Figures verified against HMRC guidance on 28 July 2026. gov.uk, HMRC Employment Income Manual, legislation.gov.uk and Acas checked at source on 29 July 2026.
Almost everything written under this heading is really about software. It describes a product, calls the description a process, and skips the part where you have to decide how long a colleague on £12.71 an hour should fund your travel budget out of their current account.
This page is about the process. Software is one answer to it, and a good one past a certain size, but it is not the subject. If you have already decided you want a system, what expense management software is and how it works cover that ground, and whether you need it at all is a separate question with a real answer. What follows is what you have to get right whether or not you ever buy anything.
The four jobs an expense process has to do at the same time
Ask a finance director what the expense process is for and you get one answer. Ask a field engineer and you get a different one. Both are right, and the reason expense processes are so consistently bad is that nobody writes down all four objectives and admits they conflict.
The four objectives, and what each one costs the others
| Objective | What it means in practice | What it pulls against | The failure mode |
|---|---|---|---|
| Reimburse accurately and quickly | The right amount reaches the right person soon enough that they never had to think about it. | Control and evidence. Every check adds elapsed time. | People stop claiming small amounts, then stop doing the small things that generate them. |
| Stay compliant with HMRC | Reimbursements that are genuinely expenses are not taxed as pay, and the ones that are not get reported. | Speed. Compliance wants receipts, purposes and dates before payment. | A reimbursement is reclassified as earnings years later, with interest and penalties on top. |
| Produce evidence that survives audit | In three years, someone can reconstruct who claimed what, who approved it, on what evidence, against which version of the policy. | Speed and goodwill. Evidence is administrative work someone has to do. | The process was fine and you cannot prove it, which is the same as it not being fine. |
| Control spend without policing | Out of policy spend is caught before it is paid, and in policy spend goes through without an argument. | Everything. Control is the objective that expands to fill the space it is given. | Controls so heavy that people route spend around them, usually onto a personal card and a late claim. |
Where the four objectives actually collide
The collisions are specific, and if you have run an expense process you will recognise all of them.
Receipt thresholds. Requiring a receipt for everything is good for compliance and evidence and terrible for speed, because the claims that hold up a run are almost always a £3.40 car park with a faded ticket. Setting a threshold below which no receipt is needed buys speed and gives away evidence. There is no correct number, only a number you have decided on and can defend.
Approval depth. A second approver above a value catches things a line manager will not. It also adds a person who can be on annual leave. Every layer of approval is a trade of elapsed days for the chance of catching something.
Policy specificity. A detailed policy controls spend and generates rejections. A vague policy reduces rejections and controls nothing. Rejected claims are usually blamed on employees, and they are usually a symptom of a policy that cannot be followed from memory at 9pm in a service station.
Payment timing. Reimbursing through payroll is cheap, clean and slow, because a claim approved the day after cut-off waits a full month. Reimbursing by separate bank run is fast and creates a second payment process to control and reconcile.
You cannot optimise all four. You can decide, deliberately, which one you are underweighting this year, and check that the answer is not always the same one.
Check your own expense process against all four
Most process reviews score a single dimension, usually cost, and call the result an assessment. This one scores all four objectives separately, which is the only way to see the shape of the problem. Plenty of organisations turn out to be strong on control and poor on reimbursement speed, because control has a budget holder arguing for it and reimbursement speed has nobody. It is allowed to tell you that your process is fine and you do not need to buy anything.
Expense process health check
Eight questions about how your process actually runs, not how it is written down. It scores the four objectives separately so you can see which one you have been paying for the others with. Nothing is sent anywhere, there is no email gate, and the arithmetic is described below the result so you can argue with it.
38HMRC compliance
55Audit evidence
43Spend control
79
Two of the four objectives are being traded away to fund the other two. That trade is usually invisible until an audit or a resignation makes it visible.
Reimbursement is the objective you are trading away. It is the one with no regulator behind it, so it loses every argument about priorities, and it is the only one your staff can feel. Fix the elapsed time before you buy anything that improves control.
Watch item: some of your claimants are paid at or near the minimum wage and are funding work costs from their own pocket for more than two weeks. Unreimbursed expenditure in connection with the employment reduces pay for minimum wage purposes. That is an enforcement risk, not only a morale one.
Fix these first, in this order
- Attach the receipt image to the claim line at the moment of capture. Evidence that lives in an inbox is evidence you will not find in three years.
- Stop moving claim data by hand. Re-keying is where the errors, the delays and the broken digital links all come from.
- Cut the elapsed time from submission to payment. Every extra week is a week of your staff’s money funding your working capital.
- Publish the policy where the claim is made, not on the intranet. A rule nobody reads at the moment of spending is not a control.
How it scores. Each objective starts at 100 and loses points for the specific things that damage it. Elapsed days and rejection rate cost reimbursement. Missing or scattered evidence and hand re-keying cost compliance and audit evidence hardest, because those are the two that have to be reconstructed later. An absent policy and an absent checker cost control. A rejection rate above 15% also costs control, on the argument that a process rejecting one claim in six is not controlling spend, it is generating work. Nothing here is a benchmark handed down by anyone, it is a way of making the trade visible.
The employee’s side, which almost nobody writes about
Search this subject and you get page after page written for the employer. Reduce processing cost, increase policy compliance, gain visibility. The person who paid £186 for a train ticket to Leeds out of their own account gets a sentence about morale.
How long reimbursement takes, and why that is not a soft issue
When an employee pays for something the business needs, they are lending the business money on an unsecured, interest free basis, with no agreed repayment date. Framed like that, most finance teams would not accept the terms if they were on the other side of them.
The size of the loan matters less than who is making it. The National Living Wage from 1 April 2026 is £12.71 an hour for workers aged 21 and over, £10.85 for 18 to 20 year olds and £8.00 for under 18s and apprentices. A 37.5 hour week at £12.71 is £476.63 gross before tax and National Insurance. A single £186 rail fare is roughly two fifths of that person’s gross weekly pay, held for however long your process takes. The same £186 charged by a sales director on £90,000 is a rounding error in their current account.
This is why an average reimbursement time is close to useless as a management number. The average conceals exactly the cases that matter. What you want to know is the elapsed time for your slowest decile, and whether the people in it are the ones who can least afford to wait.
The predictable consequences of a slow process are not moral, they are operational. People stop claiming small amounts, which quietly destroys your spend data. People delay claiming until they have enough to make it worth the admin, which is how you end up with a claim in March for a taxi in November and a receipt nobody can read. People decline the trip. And people put it on a personal credit card and pay interest on your working capital, which they will remember.
Expenses and the National Minimum Wage
This is the part almost no expense guide covers, and it is the one with an enforcement body attached to it.
Under regulation 13 of the National Minimum Wage Regulations 2015, the following are treated as reductions in a worker’s pay for minimum wage purposes: “deductions made by the employer, or payments paid by or due from the worker to the employer, as respects the worker’s expenditure in connection with the employment”, and “payments to any person (other than the employer) on account of the worker’s expenditure in connection with the employment unless the expenditure is met, or intended to be met, by a payment paid to the worker by the employer”.
Read the second limb again. Money a worker spends with a third party, in connection with their employment, reduces their minimum wage pay unless the employer reimburses it or intends to.
HMRC’s guidance on calculating the minimum wage is blunter still. “Any deduction from a worker’s pay by you in respect of specific expenses that are actually incurred in connection with their employment will always reduce pay for minimum wage purposes.” On required clothing: “Where the worker instead pays for the work wear by making a purchase either from you or a third party, then this will also reduce minimum wage pay unless you reimburse, or intend to reimburse, the cost.” On equipment: “Deductions or unreimbursed payments made by a worker for any Personal Protective Equipment, or any other required equipment, will reduce the worker’s pay for minimum wage purposes.” And the definition is wide: “An expense includes any requirement imposed on the worker by you, contractually or otherwise.”
The practical exposure sits in a specific set of situations, and none of them look like expense fraud:
- A care worker or a delivery driver paid at or just above the minimum wage who buys their own uniform items, safety boots or DBS check and is either not reimbursed or reimbursed late.
- A worker required to buy their own tools, hand equipment or PPE for a role paid near the wage floor.
- A worker paying for travel between assignments out of their own pocket, where the travel is a requirement of the job rather than ordinary commuting.
- Any of the above where the reimbursement lands in a later pay reference period than the spend. The regulation works pay reference period by pay reference period, so timing is not a technicality.
The point is not that every unreimbursed expense is an underpayment. It is that an organisation which thinks of slow reimbursement as an inconvenience has misread the risk. For a workforce paid comfortably above the wage floor this section does not apply. For a workforce with people near it, reimbursement speed stops being a service level and becomes a compliance control, and it should be measured by that population rather than by an average.
What happens when someone leaves with a claim outstanding
Almost every published expense policy is silent on this, and it is the moment the process is most likely to fail.
Start with the legal position, because it is counter intuitive. An unpaid expense claim is not an unlawful deduction from wages. Section 27(2) of the Employment Rights Act 1996 excludes from the definition of wages “any payment in respect of expenses incurred by the worker in carrying out his employment”. So the quick, free, well trodden route an employee would normally take to recover money from an employer is closed to them.
What is left is a contract claim. An employment tribunal can hear a breach of contract claim from an employee whose employment has ended, but article 10 of the Extension of Jurisdiction Order 1994 caps what it can award at £25,000. Below that ceiling and outside the tribunal route, the claim is a county court matter.
Two things follow. First, for an employee still in post the practical remedy is poor, which is exactly why an employer should not rely on it as the reason the process works. Second, an expense claim outstanding at termination is a live contractual debt with a six year limitation period, and it does not go away because somebody left on bad terms.
Acas is clear that a worker should get their final pay on the date they are normally paid and that employers “should make sure the person leaving understands how their final pay was calculated”. Expenses are not final pay, which is precisely why they get forgotten: they sit outside the payroll leaver process that everyone follows.
The fix is a leaver rule in the policy, not a system feature. Name a deadline for submitting outstanding claims after the last working day, commit to a payment date for anything valid, and put the check into the leaver checklist alongside the P45 and the laptop. Cutting off system access on the last day and then refusing claims because they were not submitted through the system is a position that survives exactly one tribunal.
Time limits, in both directions
There is no statutory deadline by which a UK employer must reimburse an expense. There is also no statutory deadline by which an employee must claim. Both are contractual, which means whatever your policy says, provided the policy was communicated.
A submission deadline is legitimate and worth having. Claims arriving five months late are unverifiable, they wreck period comparisons, and they are where duplicate and inflated claims hide. Sixty days from the date of spend is a common and defensible line. What makes it enforceable is a matching commitment in the other direction: if you require a claim within 60 days, commit to paying a valid one within a stated number of days. A deadline that only binds one party reads as what it is.
What the employer has to do, by expense type
This is the table most guides gesture at. The general rule is that reimbursing an employee for money they properly spent on the business is not pay, and does not have to be reported, because of the exemption for paid or reimbursed expenses that replaced the old dispensation regime. The exceptions to that rule are what generate P11D entries, Class 1A liabilities and compliance visits.
Employer obligations by expense type, 2026-27
| Expense type | Tax and NIC treatment when handled correctly | What you report | HMRC reference |
|---|---|---|---|
| Business mileage in the employee’s own car or van | Free of tax and NIC up to the approved rates: 55p for the first 10,000 miles and 25p above, plus 5p per passenger per mile. Anything paid above the approved amount is taxable. | Nothing at or below the approved amount. Excess goes through payroll for NIC and is reported for tax. | Business travel mileage, rules for tax |
| Actual cost of qualifying business travel, reimbursed against a receipt | Covered by the exemption for paid or reimbursed expenses. No tax, no NIC. | Nothing, provided the expense would have qualified for a deduction. | Exemption for paid or reimbursed expenses |
| Subsistence paid at HMRC benchmark scale rates | Exempt where the qualifying travel test is met. Current rates are £5 (5 hours), £10 (10 hours) and £25 (15 hours and ongoing at 8pm), plus a £10 supplementary rate. The £15 late evening figure still circulating online is superseded. | Nothing, but you must be able to show the qualifying travel test was applied. | EIM30240 |
| Subsistence at a bespoke rate agreed with HMRC | Exempt within the terms of the approval notice. A checking system is still required, and “your employees cannot check their own expenses”. | Nothing while the approval notice is live. Evidence of the checks has to exist. | EIM30270 |
| Round sum allowances paid with no receipts and no approval notice | Earnings. PAYE and Class 1 NIC apply through payroll. | Through payroll, as pay. | Expenses and benefits A to Z |
| Ordinary commuting to a permanent workplace | Not a business expense at all. Reimbursing it is pay. | Through payroll, as pay. | Travel and subsistence |
| Entertaining clients and customers | Reimbursement to the employee is generally covered, but the cost is not deductible for corporation tax and the VAT is not recoverable. | Nothing for the employee. Disallowed in the accounts and blocked for VAT. | Entertainment |
| Annual staff event | Exempt up to £150 per head per year. It is a cliff edge, not an allowance: £151 makes the whole cost taxable, not the excess. | P11D and Class 1A at 15% if the exemption is breached. | Social functions and parties |
| Trivial benefits | Exempt at £50 or under per benefit where the conditions are met, with a £300 annual cap for directors of close companies. | Nothing when the conditions are met. Everything when they are not. | Trivial benefits |
| Professional subscriptions and fees | Exempt where the body is on HMRC’s approved list. Not exempt where it is not, however work related it looks. | Nothing if approved. P11D or payroll if not. | Subscriptions and professional fees |
| Tools, work clothing and PPE the employee is required to buy | Reimbursing the actual cost is exempt. Leaving it unreimbursed reduces minimum wage pay for anyone near the wage floor. | Nothing if reimbursed against evidence. | Uniforms, work clothing and tools |
| Employee’s own mobile contract, business calls reimbursed | Reimbursing itemised business calls is exempt. Paying the whole bill on a contract in the employee’s name is a taxable benefit. | P11D or payroll where the whole bill is met. | Mobile phones |
| Homeworking costs | Additional household costs can be paid free of tax and NIC at HMRC’s flat rate, or above it against evidence. | Nothing at the flat rate. Above it, evidence has to support the amount. | Homeworking |
Two things about that table are worth stating plainly. The mileage row says 55p, not 45p. The approved rate for cars and vans rose from 45p to 55p for the first 10,000 miles on 6 April 2026, the first change since 2011-12. Most UK pages on business mileage still say 45p, including pages edited this year. Note also that gov.uk’s “Rates and thresholds for employers 2026 to 2027” page shows 45p, because that is the National Insurance figure and the tax figure sits on the business travel mileage page. Our post on HMRC mileage rates for 2026-27 works through both.
The subsistence row says £25, not £15. HMRC’s older page at EIM05231 still serves the superseded 2009 to 2016 scale rates and several accountancy sites cite it. The current page is EIM30240.
P11D, P11D(b) and Class 1A
Where a benefit or expense falls outside the exemption and is not payrolled, it goes on a P11D. The deadlines are fixed and the penalties are mechanical. Expenses and benefits are reported by 6 July after the end of the tax year, employees get their copy by the same date, the P11D(b) declaring total Class 1A National Insurance goes in by 6 July, and the Class 1A payment is due by 22 July (19 July if paying by cheque). A late P11D(b) attracts “a penalty of £100 per 50 employees for each month or part month” it is late. Class 1A for 2026-27 runs at 15%.
A PAYE Settlement Agreement is the other route for minor, irregular or impracticable items, with the amounts due by 22 October. It is a way of the employer picking up the tax so the employee does not see it, and it is not a way of avoiding the question of whether the spend should have happened.
Payrolling, and what changes in April 2027
Payrolling benefits means taxing them through the payroll in real time instead of reporting them after the year end. As of 6 April 2026 you can no longer register for the service, and you can only payroll benefits you registered before that date. Payrolling becomes mandatory from April 2027, which removes the P11D route for most benefits and changes the cash timing rather than the amount.
What that means for an expense process is narrower than the headlines suggest. Properly evidenced reimbursements of business expenses are exempt, so they are not affected either way. What is affected is everything you have been treating as an expense that is really a benefit, and mandation removes the twelve month gap in which those used to be quietly discovered and fixed. Our posts on payrolling benefits in kind and the phased approach to it go through the mechanics.
What you have to keep, and for how long
Three retention clocks run at once and they do not agree.
- PAYE and expenses records: three years after the end of the tax year they relate to. HMRC requires “the date and details of every expense or benefit you provide”, the information needed for the end of year forms, and “any payment your employee contributes to an expense or benefit”. That is the expenses and benefits record keeping rule.
- VAT records: six years. VAT Notice 700/21 also confirms that an image of a receipt can replace the paper original, which is the point most finance teams are actually asking about. Our post on whether HMRC accepts digital receipts covers the conditions.
- Company accounting records: six years from the end of the accounting period for a limited company.
Keep to the longest clock that applies rather than running three schedules, and be careful about the one trap in this area: VAT Notice 700/22 is clear that cut and paste is not an acceptable digital link. A workflow of photograph, retype into a spreadsheet, retype into the ledger does not satisfy Making Tax Digital, however carefully the retyping is done. HMRC record keeping and the UK expense compliance guide go further.
Policy, approval and control
The policy is the input to everything else. If the policy does not decide something, the approver decides it, differently, every time, and you have no basis to reject anything.
What the policy actually has to decide
Most published expense policies are two pages of principle and no decisions. A policy that does its job answers, in writing, at least the following:
- What is claimable and what is not, by category, with the awkward categories named rather than avoided: alcohol, tips, laundry on long trips, personal calls, fines and penalty charge notices, spouse or partner travel.
- The receipt threshold, and what is acceptable when a receipt genuinely does not exist.
- Class of travel, by journey length and by grade, and whether the cheapest available fare is required or the cheapest practical one.
- Meal limits, and whether they are per meal or per day. Per day is easier to follow and harder to game.
- The mileage rate you pay and what happens if you pay below the approved amount, in which case the employee can claim Mileage Allowance Relief for the difference.
- The submission deadline, and the reimbursement commitment that balances it.
- What happens on leaving.
- Who approves what, and who approves the people at the top.
We publish a company expense policy template and an expense policy checklist, and the question of whether you need one at all has a shorter answer than you would think.
Approval, in one paragraph
Approval design is a subject in its own right and it is covered properly in automated expense approvals: who approves what at which value, why the line manager and the cost centre owner and the budget holder are usually three different people, how delegation works when someone is on leave, and what an approval trail has to record. The single rule worth repeating here is HMRC’s, from the guidance on bespoke scale rates: “your employees cannot check their own expenses”. That is segregation of duties written into tax guidance, and organisations fail it most often at the top, where the person who signs off everybody else’s claims has nobody signing off theirs.
Enforcement without policing
There are three ways to enforce a rule and most organisations only use the harshest.
A hard block stops the claim being submitted. It is right for things that are never claimable under any circumstances, and wrong for anything requiring judgement, because a blocked claim does not become a compliant claim, it becomes a claim recoded to a category that goes through.
A soft warning tells the claimant they are outside policy and lets them proceed with a reason. It produces something more valuable than compliance, which is a list of the rules people override and why. If the same rule is overridden forty times a month with the same good reason, the rule is wrong.
A silent flag passes the claim and marks it for review. Right for pattern detection, wrong as a substitute for telling people the rules.
The failure mode of hard blocking everything is not non compliance, it is invisibility. People do not stop spending. They stop telling you.
Cards, reimbursement, or a mix
Whether employees spend their own money or the company’s is the single biggest structural decision in the process, and it changes the shape of everything downstream.
What each funding model does to the process
| Reimbursement | Company expense cards | A mix | |
|---|---|---|---|
| Who is out of pocket | The employee, from spend to payment. | Nobody. The company pays the merchant directly. | Depends on the category, which is the point of the split. |
| Cash flow effect | Positive for the employer, negative for the employee. You are financed by your staff. | Neutral to negative for the employer, depending on settlement terms. | Mostly neutral. The out of pocket tail is small and manageable. |
| When you see the spend | When it is claimed, which can be months. | At the point of authorisation, near enough live. | Live for card spend, delayed for the rest. |
| Where the control sits | After the money is spent. You can refuse to pay, which is an argument, not a control. | Before and during. Limits, merchant categories and per transaction caps stop it happening. | Preventive on cards, detective on claims. |
| VAT evidence risk | High. The receipt is in someone’s coat pocket. | Different, not lower. You have a card line without a VAT receipt, which reclaims nothing. | Two evidence problems to solve rather than one. |
| Month end work | Approve and pay claims. | Reconcile every transaction to a receipt and chase the ones without. | Both, so process design matters more. |
| Best fit | Low volume, occasional travel, salaried staff who can carry it. | Frequent travel, fuel and parts, anyone paid near the wage floor. | Most organisations above about 50 claimants. |
The argument that usually decides it is not cost, it is who can afford to wait. Giving expense cards to the people with the highest spend and the highest salaries is the common pattern and it is exactly backwards. The person who should never be out of pocket is the field engineer buying £60 of parts on a Tuesday, not the director whose company card mostly buys lunch.
Cards do not remove the compliance work, they move it. An unmatched card transaction is worse than a missing claim, because the money has already gone and you are now reconstructing what it was for. That is the argument for pairing cards with capture at the point of spend rather than at the end of the month, and it is what the card reconciliation side of a system is for.
Fraud and error are not the same problem
Expense fraud gets the attention because it makes a better story. Error costs more, and the two need opposite responses.
Deliberate fraud is a small number of people doing a repeatable thing: the same receipt submitted twice across two periods, claims dated during booked annual leave, mileage for journeys that did not happen, personal spend recoded as a business category, splitting a purchase to stay under a receipt threshold. It is detected by pattern, over time, across a population. It is not detected by a manager looking at one claim, because one claim looks fine, which is the whole point.
Error is most people, occasionally: the wrong VAT rate, the wrong cost centre, a category chosen from a dropdown by whoever was closest alphabetically, a mileage claim from the office when the journey started at home, a claim for something the policy has never covered and the claimant did not know. It is prevented at the point of entry, not detected afterwards.
Confusing the two is expensive in both directions. Treating error as fraud means investigating decent people for making a mistake your form invited them to make. Treating fraud as error means adding another mandatory field, which the person committing fraud completes correctly.
Why treating everyone as a suspect costs more than it saves
Every additional check has a cost, and it is paid by the compliant majority. If a control adds four minutes to every claim to catch the 1% that are wrong, you are spending ninety nine people’s time to find one. Sampling exists precisely because reviewing everything to the same depth is not a control, it is a cost with a control shaped hole in it.
The second, larger cost is behavioural. A process that treats claims as suspicious until proven otherwise produces defensive claiming: people claim less than they are entitled to, or they stop claiming and quietly resent it, or they inflate a claim they know is unverifiable because they feel owed. None of that shows up in the fraud numbers and all of it shows up in the culture.
The workable position is narrow rules enforced consistently, applied to everyone including the executive team, with sampling behind them and a fast route for anything ordinary. We cover the detail in examples of business expense fraud, detection and prevention, and, for the part nobody wants to do, how to confront an employee about it.
Measuring the process
Most expense reporting measures spend. Almost none measures the process that produced it. Four numbers tell you nearly everything, and none of them requires software to calculate.
Four process metrics, how to calculate them, and what good looks like
| Metric | How to calculate it | What good looks like | What moves it |
|---|---|---|---|
| Cost per claim | Fully loaded time of everyone who touches a claim (claimant, approver, finance) at their actual hourly cost, plus any software cost, divided by claims processed. | Falling year on year, and below the value of the claims you are choosing not to check. If it costs more to process than the claim is worth, stop checking that band. | Number of touches, re-keying, chasing missing receipts. |
| Time to reimburse | Working days from submission to cleared funds. Report the median and the 90th percentile, not the mean. | A median inside your pay cycle, and a 90th percentile that is not three times the median. The gap between them is where your problems live. | Approval delay, payroll cut-off, batch frequency, claims stuck pending evidence. |
| Rejection rate | Claims returned or rejected as a percentage of claims submitted. Split by reason code, or the number tells you nothing. | Low and falling for the same reason. A steady 15% for missing receipts is a form problem, not a people problem. | Policy clarity, what the submission form asks for, whether the rules are visible at the point of claim. |
| Evidence completeness | Percentage of claim lines above your receipt threshold that have a legible receipt attached, measured at payment, not later. | Above 95%. Below that, your VAT reclaim is leaking and your audit position is weak. | Capture at the moment of spend versus capture at month end. |
Two warnings about measuring this. First, resist a single composite score. The moment you average the four together you can hide a catastrophic reimbursement time behind excellent control, which is precisely the failure the health check above is designed to expose. Second, cost per claim and time to reimburse move in opposite directions under most interventions, so any change that improves both is worth understanding properly, and any vendor claiming both without a mechanism is describing a benefit rather than a change.
Our posts on expense reporting metrics and metrics for growing businesses go wider, and the true cost of managing employee expenses unpacks the cost side.
When the process needs software, and when it does not
Plenty of organisations do not need expense software, and are told otherwise by everyone including us. The honest test is not headcount, it is whether any of the following is true.
- Volume. Below roughly 30 to 40 claims a month, a shared inbox, a template and a disciplined person will beat a system, and the system will cost more than it saves. Spreadsheets against expense software works through where the line sits.
- Evidence. If receipts are routinely missing at payment, no amount of policy fixes it, because the problem is the gap between spending and recording. This is the strongest single case for software, and it is really a case for capture at the moment of spend.
- Distribution. A workforce in one building can walk a receipt to finance. Field engineers, care workers, drivers and site teams cannot, and a paper process taxes exactly the people least able to absorb it.
- VAT. If you are reclaiming VAT on employee expenses and cannot evidence it line by line, you are either losing reclaim or carrying a risk. Reclaiming VAT on employee expenses covers what a valid claim needs.
- Audit. Grant funding, public money, rebilling to clients or a regulator in the picture all raise the evidence bar past what an inbox can hold.
If none of those is true, your process is probably fine and the money is better spent elsewhere. If two or more are true, the arithmetic usually works, and what expense software actually costs plus our ROI calculator will get you to a number. For smaller organisations, expense management for small business is the more useful starting point.
What this looks like in Capture Expense
Capture Expense is a UK built, UK hosted expense platform, and expenses are the whole product rather than a module inside a wider finance suite. It is part of PSSG, the same group as Cintra payroll, which matters here for one specific reason: reimbursement usually runs through payroll, and the payroll cut-off is the deadline that actually binds your time to reimburse.
Against the four objectives, the pieces that do the work are the mobile app with full desktop equivalence and capture through WhatsApp, Slack and Teams, which attacks evidence completeness at the point of spend rather than at month end; receipt scanning and OCR so the data is read rather than retyped, which is what keeps the digital link intact; vehicle mileage tracking at the current approved rates; approvals and policy enforcement with soft warnings as well as hard blocks; expense cards and automated card reconciliation for the spend you do not want anyone funding personally; and reimbursements paid alongside salary or by a separate bank file when payday is too far away. We hold Cyber Essentials and are listed on the G-Cloud Digital Marketplace.
Two honest limits. Our own reimbursements page describes what the product does without publishing a target time to reimburse, which is the number this article argues you should be managing, and we should. And below about ten claimants none of this configuration pays for itself: a shared inbox and a spreadsheet is genuinely the better answer, and any vendor telling you otherwise is selling. If you want to test the rest, the software checklist is a better preparation for a demo than a feature list, and you can book a demo when you have one. The buyer’s guide sits above all of it.
Frequently asked questions
How long does an employer have to reimburse expenses in the UK?
There is no statutory deadline. Reimbursement timing is contractual, so it is whatever your policy or contract says, provided that has been communicated. In practice most employers reimburse through the next payroll run, which means anything between a few days and six weeks depending on when the claim lands relative to cut-off. The absence of a legal deadline is not the same as an absence of risk: where a worker is paid at or near the minimum wage and has funded a work cost themselves, unreimbursed expenditure in connection with the employment reduces their pay for minimum wage purposes under regulation 13 of the National Minimum Wage Regulations 2015.
Are reimbursed expenses taxable in the UK?
Not if they are genuine business expenses reimbursed properly. The exemption for paid or reimbursed expenses covers amounts that would qualify for a tax deduction, so a receipted business travel cost reimbursed at actual cost is not taxable and does not need reporting. What is taxable is anything outside that: reimbursing ordinary commuting, round sum allowances paid with no receipts and no approval notice, and mileage paid above the approved amount of 55p for the first 10,000 miles and 25p above that.
Can an employer refuse to pay an expense claim?
Yes, where the claim falls outside the policy, lacks the evidence the policy requires, or was submitted after a communicated deadline. What an employer cannot safely do is refuse a claim on a rule that was never published, apply a deadline nobody was told about, or reject claims inconsistently between people. Because expenses are excluded from the definition of wages by section 27(2)(b) of the Employment Rights Act 1996, a disputed claim is a contract matter rather than an unlawful deduction from wages, which changes the employee’s route but not the employer’s obligation.
Do I still get my expenses if I leave the company?
A valid expense claim is a contractual debt and does not disappear on termination. Acas guidance is that a worker should get their final pay on the date they are normally paid, but expenses are not final pay, so they sit outside the leaver payroll process and get missed. An ex employee can bring a breach of contract claim in an employment tribunal once employment has ended, capped at £25,000 by article 10 of the Extension of Jurisdiction Order 1994, or in the county court. The practical answer is to put a claim deadline and a payment commitment in the policy and a check in the leaver checklist.
Do unreimbursed expenses count towards the minimum wage?
They reduce it. Regulation 13 of the National Minimum Wage Regulations 2015 treats payments a worker makes to a third party in connection with their employment as reductions in minimum wage pay, unless the expenditure is met, or intended to be met, by a payment from the employer. HMRC’s guidance says an expense “includes any requirement imposed on the worker by you, contractually or otherwise”, and specifically names required work wear, tools and PPE. For a workforce paid well above the wage floor this is academic. For one paid near it, reimbursement speed is a compliance control.
What is the difference between expense management and spend management?
Expense management deals with money employees spend on behalf of the business and the reimbursement, tax treatment and evidence that follows. Spend management is broader and covers procurement, supplier contracts, purchase orders and invoices as well. The distinction matters when buying, because a spend management platform treats expenses as one module among several, and the expense workflow tends to be the shallowest part of it.
Should we give staff company cards instead of reimbursing them?
It depends who is currently out of pocket and for how long. Cards remove the employee financing problem entirely and move control from after the spend to before it, which is a genuine improvement. They do not remove the evidence problem, they change it: instead of a claim with no receipt you get a card transaction with no receipt, and the money has already left. Give cards to the people with frequent, unavoidable, immediate spend rather than to the most senior people, and pair them with capture at the moment of spend.
How do you prevent expense fraud without treating everyone as a suspect?
Separate fraud from error first, because they need opposite treatments. Error is prevented at the point of entry with a clear form and visible rules. Fraud is detected by pattern across a population over time, not by a manager reviewing a single claim, because a single fraudulent claim looks ordinary. That means narrow rules applied consistently to everyone including the executive team, sampling rather than reviewing everything to the same depth, and a fast route for the ordinary claims that make up most of the volume.
What should we measure to know whether our expense process is working?
Cost per claim, time to reimburse reported as median and 90th percentile rather than mean, rejection rate split by reason, and evidence completeness at payment. Resist averaging them into a single score: the point of measuring four things is to see when one is being sacrificed for another, which is the most common failure in this area and the one a composite number hides.
Do small businesses need expense management software?
Often not. Below roughly 30 to 40 claims a month a template and a disciplined person will beat a system on cost. The tests that actually matter are whether receipts routinely go missing before payment, whether your claimants are distributed rather than in one building, whether you are reclaiming VAT you cannot evidence line by line, and whether grant funding, public money or client rebilling raises the audit bar. If none of those is true, your process is probably fine.
Related reading
- What is expense management software and how it works, if you have decided the process needs a system.
- Automated expense approvals, for approval routing, thresholds, delegation and the audit trail.
- Expense reimbursement law in the UK and whether reimbursed expenses are taxable.
- Out of pocket expenses, for the employee’s side of a claim.
- HMRC mileage rates 2026-27, for the 55p change and what it means for what you pay.
- Expense policy and compliance and the Capture Expense platform.