Keeping evidence of business expenses

Expense evidence should support both the accounting entry and the business reason for the cost. Retain the invoice or receipt, payment information and a clear explanation where the purpose is not obvious. A company card payment does not automatically make an item deductible for tax.

Distinguish ordinary costs from assets, deposits, personal items and mixed-purpose spending. Ask for a replacement invoice when evidence is missing and record what can be established. Do not invent a receipt or retrospective description that misrepresents the original transaction.

Keep evidence of what was bought and why

Retain the supplier document, payment record and business-purpose explanation. An invoice may identify the item but not why a particular journey, meal or purchase related to the company. Add the relevant project, meeting or operational context while the facts are fresh. Avoid generic descriptions such as business use where a more specific explanation is available and material to the treatment.

Check the legal recipient and payer. A director may have paid a company cost personally, or the company may have paid something belonging to another person. Record that distinction before deciding the entry. Payment by company card does not establish tax deductibility. HMRC's expenses guidance distinguishes business purpose, capital and revenue treatment and specifically disallowed costs. ^[1]

Separate recurring costs from other payments

Review whether the amount represents an expense, asset, deposit, loan or advance. A payment to reserve equipment may not have the same accounting treatment as the final purchase. An annual subscription may relate to more than one period. Keep the agreement and service dates where they help establish the substance, rather than relying solely on the payment date shown by the bank.

For mixed purchases, identify components and the evidence supporting any split. Do not create an arbitrary business percentage simply because the whole amount appears difficult to justify. Ask the accountant about the relevant accounting, tax and benefits questions. Use Director expenses and company records for director reimbursements and Capital expenditure and tax treatment where expenditure may be capital, keeping the different decisions visible in the supporting file.

Resolve missing or imperfect documents honestly

Request a duplicate invoice or receipt from the supplier where possible. Preserve booking confirmations, order details and payment evidence that help establish the transaction. Record what remains uncertain. A bank statement can show payment without proving the exact items or tax details, so do not describe it as equivalent to a complete invoice for every purpose.

Never invent a receipt, change a date or add a false business explanation to obtain a preferred treatment. If evidence cannot be recovered, give the accountant the facts and let the uncertainty be assessed. Keep the conclusion with the entry so a later reviewer understands why it was treated in a particular way and which supporting information was unavailable.

Make submission and approval easy to follow

Set a short routine for staff to submit receipts and explanations, with clear responsibility for queries. Capture documents before paper fades or supplier accounts close. Use consistent references and check that uploaded images are readable and complete. A cropped receipt missing the supplier identity or total may be difficult to use even though the expense system marks the claim as submitted.

Review unusual amounts, duplicates and claims already paid through another route. A director's reimbursement can duplicate a company card payment if the process does not identify the original payer. Keep approval proportionate to the business, with additional review for sensitive or connected transactions. Do not let a busy month become a reason to approve unsupported claims in bulk without identifying exceptions.

For Limited company bookkeeping, provide a sample of recurring costs and the uncertain items rather than only a total expenses figure. Agree evidence standards and the division between bookkeeping and tax review. GOV.UK's company record guidance provides the wider retention context. ^[2] Keep the final decision and source documents linked to the ledger, then use repeated queries to improve the collection process for the next transaction rather than reconstructing the same missing facts every year.

Preserve context for a mixed-purpose purchase

A receipt from a general retailer may show what was bought without explaining which items belonged to the company's work. Ask the purchaser to identify the business items and provide a reasonable explanation of any proposed allocation. Keep the original document and the allocation together rather than editing the receipt to remove inconvenient lines.

If the purchase includes equipment, stock or an employee benefit, flag that classification question for the appropriate review. Payment from a company card does not resolve it. Give the bookkeeper enough context to record the transaction accurately and identify any separate tax question. This approach is more reliable than asking for a generic business expense label after the person can no longer remember what the purchase contained.

Illustrative scenario

A director pays for a meal using the company card. The record needs to identify the attendees and purpose so the accountant can distinguish staff costs, client entertaining or personal expenditure. The merchant name and amount alone do not establish the correct accounting and tax treatment.

Preparation checklist

• Keep the invoice or receipt and payment reference.
• Record purpose, attendees or project where relevant.
• Identify personal or mixed elements clearly.
• Request missing evidence and track unresolved items.