UK guide

How to keep records as a UK sole trader (before you buy any software)

Software cannot fix records that were never kept. Whether you file from a spreadsheet or a full accounting app, the underlying habit is the same: capture every sale and expense, keep the evidence, and store it so you can find it years later. This page covers what HMRC expects, a minimal system that takes minutes a week, and the point where record keeping becomes a Making Tax Digital question.

What HMRC expects you to keep, and for how long

As a sole trader you must keep records of your business income and expenses for your Self Assessment return. HMRC's general rule is to keep them for at least 5 years after the 31 January submission deadline of the relevant tax year, longer if you file late or HMRC opens an enquiry. Check current HMRC guidance for your situation.

• All sales and income, including invoices, till rolls, and platform payout statements.
• All business expenses, with receipts or digital copies that show what, when, and how much.
• Bank statements and, if you use one, your separate business account records.
• VAT records if registered, and PAYE records if you employ anyone.
• Records of personal income you took from the business, and any grants (such as historic support payments).

Paper vs digital

• HMRC accepts digital copies for most records, a clear photo or scan of a receipt is usually fine; you do not need to keep the paper original in most cases.
• Paper fades and gets lost; thermal receipts can be unreadable within a year. Digitise as you go, not in a January panic.
• Digital-only comes with its own duty: back up. One copy on one laptop is not a record-keeping system.
• Whichever you choose, the test is the same, could you show what this transaction was, months or years later?

→ Business vs personal bank account (why separation makes records easier)

A minimal folder and naming system

You do not need software to be organised. This five-part system works in any cloud drive and scales from a side hustle to a full-time business.

1. Step 1

   One top-level folder per tax year (e.g. 2026-27), created on 6 April, not at filing time.

2. Step 2

   Inside it: income/, expenses/, bank-statements/, correspondence/, four folders cover most sole traders.

3. Step 3

   Name files date-first so they sort themselves: 2026-07-06_client-name_invoice-014.pdf.

4. Step 4

   Save receipts weekly. A ten-minute Friday habit beats a lost-receipt hunt in January.

5. Step 5

   Export platform statements (Stripe, PayPal, marketplaces) monthly, old data can become harder to retrieve later.

When records become an MTD problem

• Making Tax Digital for Income Tax began April 2026 for many sole traders, affected businesses must keep digital records and send quarterly updates from software.
• A shoebox of paper receipts cannot produce a quarterly update. If MTD applies to you, digital record-keeping stops being optional.
• Even below the threshold, quarterly-shaped records (income and expenses categorised as you go) make the eventual transition a rename, not a rebuild.
• Spreadsheets can work under MTD only with bridging software, check before assuming your current system qualifies.

→ Making Tax Digital for Income Tax: sole trader checklist (2026)

→ Spreadsheet vs accounting software (when either is enough)

Handoff checklist for an accountant

If you hand your year to an accountant, arriving organised is the cheapest thing you can do, most charge for time, and sorting a carrier bag of receipts is time.

1. Item 1

   A list of income sources and roughly what each earned in the year.

2. Item 2

   Categorised expenses, even rough categories save billable hours of sorting.

3. Item 3

   Bank statements for the full year, ideally from a dedicated business account.

4. Item 4

   Anything unusual: new equipment, use-of-home claims, mileage logs, money you put in or took out.

5. Item 5

   Your HMRC references (UTR, Government Gateway), kept somewhere you can actually find.