Accounting Records UK Businesses Must Keep

What records you need: sole trader versus limited company

Sole traders keep business records to support their Self Assessment tax return. In plain terms, that means tracking all sales and income, all allowable business expenses, and any other relevant figures such as payroll or VAT if those apply to the business. GOV.UK’s page for self-employed records outlines the core categories and the types of proof that count, such as invoices, receipts and bank statements. The essential principle is that income and costs should be supported by contemporaneous documents and be clearly identifiable as business-related.

Limited companies must keep both company records and accounting records. The company records are the statutory details about the company itself and shareholder decisions. The accounting records show and explain the company’s transactions and financial position. The GOV.UK page on company and accounting records sets out what this includes, and the Companies House guidance explains how those records feed into preparing and filing company accounts. Company records and accounting records serve different purposes: one evidences how the company is run; the other evidences the money in and out and what the company owns or owes.

For both structures, you should be able to follow a transaction from the initial document (for example, an invoice or receipt), through to how it was paid (for example, a bank statement), and into how it is recorded in your books. Keep records in an organised way and retain them for at least the minimum period that applies. As rules vary and can change, check the GOV.UK pages linked in this guide for the up-to-date details of what must be kept and how long.

• Sole traders: records of all sales and income, business expenses, and supporting proof such as invoices and receipts, as outlined on GOV.UK for the self-employed.
• Limited companies: statutory company records (for example, director and shareholder details and shareholder decisions) and accounting records that explain transactions and balances, as set out on GOV.UK.
• Keep records that let someone else understand what happened and how figures in returns and accounts were calculated.
• Use the GOV.UK links in this guide to confirm the required content and formats for your situation.
• Retain everything for at least the minimum period stated by the official sources; if in doubt, keep it safely for longer.

Separation matters: keeping business and personal activity apart

Separating business and personal activity makes record-keeping easier, reduces errors, and helps you demonstrate that entries in your books belong to the business. A practical way to create separation is to use dedicated payment methods for the business, such as a separate current account and a card that is used only for business purchases. This keeps your statements cleaner and makes it simpler to spot missing paperwork. If you do occasionally pay a business cost from a personal account, record it promptly with clear notes and evidence so it is not forgotten or misclassified.

Separation is not just about money flows. Keep your files organised by business too: distinct folders for income, expenses, banking, payroll (if relevant), taxes and year-end documents. For limited companies, store company records (for example, shareholder decisions) separately from day-to-day accounting documents. When a document relates to multiple areas (such as a signed contract that leads to several invoices), store it once in a logical place and cross-reference it in your bookkeeping notes so you can find it later.

Even a very small business benefits from simple habits: date-stamp documents as they arrive, note how and when each invoice was paid, and match payments to invoices promptly. These small steps build a clean audit trail and help avoid time-consuming sorting later. If you are unsure whether something is business or personal, pause and document your reasoning alongside the transaction and check the GOV.UK guidance or seek advice if needed.

• Use dedicated payment methods for the business to keep statements clean and traceable.
• Organise folders by category (income, expenses, banking, taxes, year-end) and by financial year.
• Store company records separately from accounting records if you run a limited company.
• Record exceptions (such as a business purchase from a personal card) immediately with a note and proof.
• Cross-reference related items (contract, invoice, payment) so the trail is easy to follow.

Building a simple, reliable evidence trail

An evidence trail links each figure in your accounts to a source document. For income, that might mean a customer invoice and a bank receipt; for expenses, a supplier invoice and a bank payment; for cash, a daily or weekly cash log with till reports or similar. The goal is that someone unfamiliar with the business could pick up your records and see, step by step, what happened and why a number appears in your return or accounts. GOV.UK highlights typical proofs such as invoices, receipts, and bank statements. Think of these as the building blocks of your trail.

Keep documents in formats you can retrieve. Paper is acceptable if stored safely and legibly. Digital copies are often more practical: scan or photograph receipts promptly and file them with clear names. Where records are kept digitally, ensure the copy is complete, readable and accessible for the required retention period. If you adjust a figure later (for example, a credit note or refund), keep the original and the adjustment together, with a short note explaining the link. This avoids confusion at year end.

The evidence trail should also cover what the business owns and owes. For assets, keep purchase documents, warranties and any finance agreements. For amounts owed to suppliers or by customers, keep statements and correspondence that show the agreed amounts and any settlements. Inventory-based businesses should maintain stock records that reconcile to purchases, sales and period-end counts. The exact level of detail expected varies by business and structure; the GOV.UK pages in this guide explain the core categories and expectations.

• For each sales invoice: keep the invoice, proof of delivery or service where relevant, and the bank receipt.
• For each expense: keep the supplier bill or receipt and the bank payment (or petty cash log if paid in cash).
• For adjustments (credit notes, refunds): keep the original, the adjustment document, and a short explanatory note.
• For assets and loans: keep agreements, schedules and related correspondence in one place.
• For stock: maintain purchase records, sales records and periodic counts that reconcile.

Day-to-day bookkeeping mechanics that make year-end straightforward

Daily and weekly routines are what keep records accurate. Record sales and income promptly, ideally in a simple ledger or software, and file matching documents. For expenses, capture the receipt while it is fresh. If you operate with cash, maintain a cash log that records takings and cash payments with dates and descriptions; regularly count the cash and reconcile it to your log and till reports. For bank transactions, set a rhythm to check statements and match each entry to an invoice, receipt or note so nothing is left unexplained.

Reconciliation is the heart of dependable records. Match customer invoices to receipts from the bank. Match supplier bills to bank payments. Unmatched items need attention: either the document is missing, the date differs, or the amount changed (for example, due to a partial payment). Investigate and annotate the record so the resolution is captured. Where you hold customer deposits, staged payments or retainers, document the terms (for example, a contract or booking confirmation) and keep a running list that shows how each payment relates to delivered work or goods.

For limited companies, bookkeeping mechanics also connect to statutory accounts. Keep schedules for key balances that are likely to appear in the accounts (for example, trade debtors and creditors), and keep them reconciled to supporting documents such as statements and remittances. For sole traders, similar schedules help you complete your Self Assessment figures with confidence. The Companies House overview in this guide explains how good underlying records support the preparation and filing of accounts for companies.

• Make entries regularly and file the matching proof at the same time.
• Reconcile bank, card and cash activity to invoices and receipts on a set schedule.
• Maintain simple schedules for amounts owed by customers and to suppliers, and keep them in step with statements.
• Investigate unmatched or unusual items promptly and document the outcome.
• Keep clear notes for deposits, part payments and refunds so the story is obvious later.

Company records and year-end: how the pieces fit together

Limited companies keep company records that show how the company is run, alongside accounting records that show what the company did financially. Company records can include details of directors and shareholders and shareholder decisions (resolutions). These should be kept up to date and stored safely. The accounting records need to show and explain transactions, assets and liabilities, and they underpin the company’s annual accounts. GOV.UK’s page on company and accounting records sets out what the law expects companies to keep, and the Companies House overview explains the annual accounts process.

At year end, tidy bookkeeping makes preparing accounts more straightforward. Ensure income and expenses are complete, bank and cash are reconciled, customer and supplier lists agree to statements, and any year-end counts (such as stock) are documented. Keep the working papers you use to finalise figures, as they form part of the evidence trail from documents to accounts. When the statutory accounts are prepared, store the final signed set with the year’s working papers and the supporting records. If your company makes shareholder decisions that affect the accounts, keep the relevant minutes or written resolutions with the year’s file and cross-reference them in your working papers.

Sole traders do not keep company records, but the same discipline applies at year end: ensure your income and expenses are fully captured, your bank and cash reconcile, and you retain the workings used to complete your Self Assessment. The GOV.UK page for self-employed records provides the categories you should track, and those figures should be supportable from your saved documents.

• For companies: maintain statutory company records and keep them separate but cross-referenced to accounting records.
• File signed year-end accounts with the supporting working papers and evidence for that year.
• Document any shareholder decisions (resolutions) that affect the accounts and store them with the year’s file.
• For both structures: complete reconciliations and year-end counts and keep the workings.
• Use the GOV.UK and Companies House links in this guide to confirm formal requirements and timelines.

What to do, in order

1. 1

   Map your record categories

   List the categories you need to track based on the GOV.UK pages in this guide: for example, sales and income, expenses, bank and cash, assets and liabilities, and (for companies) statutory company records.

2. 2

   Set up simple storage

   Create folders for each financial year and subfolders for income, expenses, banking, taxes and year-end. For companies, add a company records folder for director and shareholder details and decisions.

3. 3

   Capture documents at source

   When you raise an invoice or receive a bill or receipt, save it immediately with a clear file name that includes the date, amount and counterparty. If paper, scan or photograph it while it is fresh.

4. 4

   Reconcile routinely

   On a weekly or monthly cycle, match bank and card entries to invoices and receipts. Investigate and document any unmatched items or partial payments so there are no loose ends.

5. 5

   Prepare for year end early

   Keep running lists for customers and suppliers that reconcile to statements. Schedule any stock counts and ensure deposits, part payments and refunds are clearly documented. File the final accounts or Self Assessment workings with that year’s records.