Employee expenses are one of those business processes that starts simple and gradually becomes a headache. A few receipts in a folder, a spreadsheet on a shared drive, and emails with "can you approve this?" in the subject line. It works until it doesn't — and when HMRC comes asking questions, "it was in an email somewhere" isn't an acceptable answer.
This guide covers everything UK small businesses need to know about expense management in 2026: HMRC rules, policy design, digital vs paper claims, and the best tools for automating the whole process.
If your employees ever spend money on behalf of the business — whether it's train tickets, client lunches, software subscriptions, or mileage — you need a system to track, approve, and reimburse those costs. Here's why it matters:
HMRC requires businesses to keep records of all expenses for at least 6 years. If you can't produce receipts and approval records during an audit, you risk penalties, disallowed claims, and additional tax assessments. A proper system ensures every claim is documented and stored.
Manual expense processing is slow. Employees fill out forms, attach receipts, email managers, wait for approval, then wait again for reimbursement. Finance teams re-enter data into spreadsheets. A study by the Global Business Travel Association found the average expense report takes 20 minutes to complete and 18 minutes to process. Multiply that by dozens of claims per month and the cost adds up quickly.
Without clear policies and approval workflows, expense fraud can creep in — inflated receipts, personal purchases disguised as business expenses, or duplicate claims. Even honest mistakes are common when the process is informal. Structured approvals and receipt requirements catch problems early.
Knowing what your team is spending — and on what — helps you budget accurately. Real-time expense tracking shows you total outstanding claims, spending by category, and trends over time.
Understanding what HMRC allows (and requires) is the foundation of good expense management. Here are the key rules for UK businesses:
For an expense to be tax-deductible (and not a taxable benefit), it must be incurred wholly, exclusively, and necessarilyin the performance of the employee's duties. This is HMRC's golden rule. A train ticket for a client meeting passes the test. A new suit for work does not — even if the employer requires formal dress.
HMRC expects businesses to retain:
If you reimburse expenses that don't meet the "wholly, exclusively, and necessarily" test, or provide benefits in kind, you must report them on the employee's P11D form by 6 July following the tax year. Alternatively, you can apply for a PAYE Settlement Agreement (PSA) to pay the tax on behalf of the employee, or register for payrolling benefits to handle it through regular payroll.
A clear expense policy protects your business and removes ambiguity for employees. Here's what to include:
Group expenses into clear categories so claims are consistent and reportable:
Define who can approve what:
Make it non-negotiable: no receipt, no reimbursement. Specify that receipts must show the date, vendor, amount, and VAT. Digital photos or scans are acceptable — there's no HMRC requirement for paper originals.
Set a clear deadline for submitting claims — for example, within 30 days of the expense being incurred, or by the 5th of the following month. Late claims should require exceptional approval.
Tell employees when they'll be reimbursed. Common approaches include:
The shift from paper to digital expense management is well underway, and for good reason:
| Factor | Paper claims | Digital claims |
|---|---|---|
| Submission | Physical form + attached receipts | Online form, photo of receipt |
| Approval speed | Days to weeks (physical routing) | Minutes to hours (notification-based) |
| Storage | Filing cabinets (6+ years) | Cloud storage, searchable |
| Audit trail | Manual logs, signatures | Automatic timestamps and user tracking |
| Reporting | Manual spreadsheet compilation | Real-time dashboards and exports |
| Lost receipts | Common, hard to recover | Rare — stored immediately on upload |
HMRC accepts digital records as long as they are legible, complete, and stored securely. There is no requirement to keep paper originals if you have adequate digital copies.
Here are the top options for small businesses in 2026:
LeaveApprove now includes a dedicated Expensesmodule alongside leave management, rotas, and performance tracking. It's built for UK SMBs who want to manage their people in one platform without juggling multiple subscriptions.
Employees submit expense claims with a description, amount, category, and receipt upload. Claims go to their manager for approval. Managers can approve or reject with one click, and approved claims can be marked as paid once reimbursed. The full history — submitted, approved, rejected, paid — is visible to both employee and manager.
Pleo provides company cards (Visa) with built-in expense management. Employees pay with the card, snap a photo of the receipt, and the expense is automatically categorised and submitted. It's popular with tech startups and remote teams.
Dext is a receipt capture and bookkeeping tool that uses OCR to extract data from receipts and invoices. It integrates tightly with accounting software like Xero, Sage, and QuickBooks.
Moss combines corporate cards, invoice management, and expense reimbursement in one platform. It's aimed at mid-sized businesses with more complex spending workflows.
Expensify is a well-known expense management tool offering SmartScan receipt capture, automatic mileage tracking, and integrations with most accounting platforms.
LeaveApprove's expense module is designed to be straightforward for both employees and managers. Here's how it works:
Employees go to the Expenses section and click New Claim. They fill in:
The claim is created with a Pendingstatus and the employee's manager is notified.
Managers see all pending claims from their team in one view. They can review the description, amount, category, and attached receipt, then Approve or Reject with a single click. Rejected claims can include a reason so the employee knows what to fix.
Approved claims move to an Approved status. Once reimbursed (through payroll or bank transfer), an admin marks the claim as Paid. The full lifecycle — Pending, Approved, Rejected, Paid — is visible on each claim with timestamps.
Managers and admins can view expense summaries by employee, category, and time period. This makes it easy to spot trends, prepare for payroll, and maintain records for HMRC.
If you're moving from informal expense handling to a proper system, here's a step-by-step approach:
Employees can claim expenses incurred wholly, exclusively, and necessarily for business purposes. Common claimable expenses include travel (mileage, train fares, parking), accommodation for overnight business trips, subsistence (meals while travelling), client entertainment, home office costs, professional subscriptions, and work-related training.
HMRC requires businesses to keep records for at least 6 years after the end of the tax year they relate to. This includes receipts, invoices, and any documentation supporting expense claims. Digital copies are accepted provided they are legible and stored securely.
You can manage expenses with spreadsheets if you have fewer than 5 employees making occasional claims. Beyond that, software saves significant time on approvals, receipt storage, reporting, and HMRC compliance. Tools like LeaveApprove include expense management from £8/user/month alongside leave, rotas, and performance.
The approved HMRC mileage rate for cars is 45p per mile for the first 10,000 business miles in a tax year, and 25p per mile thereafter. Motorcycles are 24p per mile, and bicycles are 20p per mile. These rates have remained unchanged since 2012.