The Ultimate Small Business Record Keeping Checklist (UK)

Nobody starts a business because they love record keeping. It’s the part that gets pushed to the bottom of the list, right up until HMRC asks a question you can’t answer, or your accountant sends back a return full of gaps. The good news is that record keeping isn’t complicated once you know what you’re actually supposed to keep, for how long, and in what form. This is that list, the full one, not the version that leaves out the bits that only matter once a year.

What actually counts as a business record

HMRC’s definition is broader than most people expect. It’s not just receipts. A business record is anything that shows money coming into or going out of your business, along with anything that supports the numbers on your tax return. That covers income documents, expense documents, bank records, and, depending on your business, mileage, payroll, and VAT records too. If a document helps explain where a number on your return came from, it counts.

Income records

Every pound your business earns needs a paper trail, even the informal ones.

• Invoices you’ve issued to clients or customers
• Payment confirmations, whether that’s a bank transfer reference, a card payment receipt, or a platform payout summary
• Till receipts or daily sales summaries if you sell in person
• Records from platforms like Etsy, eBay, or Shopify if that’s where your sales happen
• Any other income the business receives, including grants, and anything you might be tempted to think of as too small to bother recording

Expense records

This is the category most people are already familiar with, but the detail matters more than the habit of just keeping receipts.

• A receipt or invoice for every expense, or a clear note explaining why one isn’t available
• The correct HMRC category is attached to each expense, not left in a general or uncategorised bucket.
• The right VAT rate applies consistently if you’re VAT registered.
• A clean split between personal and business spending, especially if you’ve ever used a personal account or card for something business-related

We’ve written in more detail about getting this part right before handing anything to an accountant worth a read if this is the part that usually slips.

Mileage and travel records

If you drive for business, whether that’s for client visits, site work, or collecting supplies, HMRC expects a mileage log to be kept at the time of travel, not reconstructed afterwards from memory. Each entry should include the date, the reason for the journey, where you started and ended, and the total miles. If you’re claiming mileage under HMRC’s approved rates rather than actual vehicle costs, this log is the only thing standing between a legitimate claim and one HMRC can’t verify.

VAT records, if you’re registered

VAT-registered businesses carry an extra layer of record-keeping on top of everything else.

• VAT invoices for anything you’ve charged VAT on
• Records of VAT paid on business purchases
• Copies of every VAT return submitted
• A consistent rate applied across similar transactions, since mismatched rates on near-identical purchases are one of the first things that get flagged in a check

VAT records need to be kept for six years, longer than the general rule for income and expenses, so it’s worth storing them somewhere they won’t get cleared out early by mistake.

Payroll records, if you employ anyone

The moment you take on staff, even a single part-time employee, a new set of records kicks in.

• Payslips and the calculations behind them
• PAYE and National Insurance records
• Statutory pay records, covering sick pay, maternity, and paternity pay where relevant
• Records of any expenses or benefits provided to employees

These sit alongside your general business records rather than replacing them, and they’re subject to their own scrutiny if HMRC ever checks your payroll compliance separately from your income tax position.

Bank statements and reconciliation

Bank statements matter for a reason beyond just proving a transaction happened. They’re the reference point you check everything else against. A monthly habit of comparing your logged expenses and income to what actually moved through your account catches duplicate entries, missing transactions, and mistakes long before they turn into a bigger problem at tax time. A dedicated business bank account makes this dramatically easier, since it removes the guesswork of separating what belongs to the business from what doesn’t.

How long do you actually need to keep everything?

This is the part people get wrong most often, usually by clearing things out too early.

• Sole traders and partnerships: at least five years after the 31 January submission deadline for the relevant tax year. For the 2024 to 2025 tax year, filed by 31 January 2026, that means keeping records until at least 31 January 2031.
• Limited companies: at least six years from the end of the financial year to which the records relate.
• VAT records: six years, regardless of business structure.
• If you file a return more than four years late, records need to be kept for a further 15 months after you file.
• If HMRC opens an enquiry, records need to be kept until that enquiry is fully resolved, however long that takes.

A lot of accountants recommend rounding everything up to six years as a safer default, since it removes the need to track slightly different deadlines for different document types.

Digital records and Making Tax Digital

HMRC doesn’t require a specific format. A photo of a receipt taken on your phone counts, provided it’s clear, and you keep the original if there’s any doubt about legibility. What it does require is that cash transactions get recorded at the time, not weeks later from memory.

This is changing gradually for a growing number of businesses. Making Tax Digitalfor Income Tax becomes mandatory from April 2026 for sole traders and landlords earning over £50,000, extending to those earning over £30,000 from April 2027, and over £20,000 from April 2028. Once it applies to you, paper records and basic spreadsheets on their own are no longer enough. You’ll need compatible software, and the traditional annual return gets replaced with quarterly updates plus a final declaration. If you’re anywhere near these thresholds, moving to digital record keeping now avoids a scramble later.

What happens if your records fall short

Incomplete or missing records don’t just create an awkward conversation with your accountant. HMRC can charge a penalty of up to £3,000 per tax year for inadequate record keeping, and if the gaps mean your reported profit looks understated, they can estimate your tax bill themselves, usually not in your favour.

Turning this into a habit rather than a checklist you dread

The list above looks long, written out in full, but almost none of it needs to happen in one sitting. Logging income and expenses as they happen, attaching receipts at the time rather than searching for them later, and doing a short monthly review keep every one of these categories covered without a single stressful weekend before a deadline.

Built For Small Business handles the income, expense, VAT, and mileage side of this list in one place, with categories and receipts attached from the moment you log something, rather than being sorted out after the fact. It’s free forever; no card required to start.

Start keeping records the easy way.