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.