Sole Trader Bookkeeping Responsibilities: 2026/27 Guide

A sole trader must keep accurate records of business income and expenses, retain supporting evidence, complete Self Assessment and comply with VAT, PAYE and Making Tax Digital where applicable. Hiring a bookkeeper does not transfer legal responsibility away from the taxpayer.

Core bookkeeping responsibilities

• record every sale and other business receipt;
• record allowable and non-allowable expenses separately;
• identify personal money introduced and drawings;
• reconcile bank, card, cash and payment-processor accounts;
• retain invoices, receipts, statements and contracts;
• track stock, work in progress and assets where relevant;
• maintain VAT and payroll records if registered or employing staff;
• prepare reliable profit figures; and
• keep personal-income evidence needed for Self Assessment.

Business and personal transactions

A sole trader is not legally separate from the owner, but bookkeeping must still distinguish business activity from personal spending. Use:

• capital introduced for money paid into the business;
• drawings for personal withdrawals;
• business-use proportions for mixed costs; and
• separate records for each trade.

A dedicated business bank account is not universally required by tax law for a sole trader, but it makes reconciliation and evidence much clearer. Check the bank’s account terms before using a personal account for trade.

Income records

Keep:

• sales invoices and credit notes;
• till and ecommerce reports;
• bank, cash and card receipts;
• marketplace and payment-processor statements;
• grants and other business income;
• foreign-currency calculations; and
• records of amounts received without an invoice.

Do not record only the net amount paid by a marketplace after fees. Record gross income and the fee separately.

Expense records

Capture the supplier, date, purpose, category, amount, VAT and evidence. Separate:

• routine revenue expenses;
• capital expenditure;
• private-use elements;
• client entertainment and other restricted costs;
• loan principal and interest; and
• owner drawings.

See how to record business expenses.

Cash basis or traditional accounting

From 2024/25, cash basis became the default Income Tax method for eligible sole traders unless they opt for traditional accounting or cannot use cash basis.

• Cash basis: record income when received and expenses when paid.
• Traditional accounting: record income when earned or invoiced and costs when incurred, with debtors, creditors, stock and adjustments.

Choose consistently and record the election correctly. Read the cash versus accrual guide.

Making Tax Digital for Income Tax

Qualifying sole traders with gross self-employment and property income above £50,000 entered MTD from 6 April 2026. Thresholds extend to more than £30,000 from April 2027 and more than £20,000 from April 2028.

Those within scope must use compatible software, keep digital records, send quarterly updates and submit the year-end return through the MTD process. Check eligibility even if HMRC did not write.

See our 2026/27 MTD guide.

VAT records

If VAT registered, maintain digital records of sales, purchases, VAT rates and adjustments. Reconcile each VAT Return to the ledger and HMRC account.

Watch taxable turnover against the registration threshold. Voluntary registration can be beneficial in some cases but also creates pricing, administration and filing obligations.

Payroll and subcontractors

A sole trader employing staff must register and run PAYE when required, send RTI reports, maintain payroll records and comply with pensions and employment law.

Construction businesses should also check the Construction Industry Scheme for payments to subcontractors.

Assets and mileage

Keep an asset register showing cost, business use, disposal and capital-allowance information. For vehicles, choose and apply the permitted actual-cost or simplified-mileage method consistently.

From 6 April 2026 the approved employee rate for own-car business travel is 55p for the first 10,000 miles, but self-employed simplified-expense rules must be checked separately.

Bank reconciliation

At least monthly:

1. agree the bookkeeping balance to the statement;
2. identify timing differences;
3. record missing fees, interest and receipts;
4. remove duplicates;
5. explain transfers and cash withdrawals; and
6. investigate old unmatched items.

How long to keep records

For Self Assessment, records generally need to be retained until at least five years after the 31 January filing deadline for the relevant tax year. Longer periods apply where returns are late or HMRC opens an enquiry.

VAT, PAYE, grants, assets and legal documents can have different requirements. Apply the longest relevant period.

Monthly checklist

• Issue and record every sales invoice.
• Post supplier bills and expenses.
• Upload supporting evidence.
• Reconcile all financial accounts.
• Review unpaid customers and suppliers.
• Check VAT and payroll controls.
• Review drawings and private use.
• Estimate tax and reserve cash.
• Back up and lock the period.

Frequently asked questions

Must a sole trader prepare statutory accounts?

Not like a limited company filing at Companies House, but sufficient records and profit calculations are required for Self Assessment, tax and business decisions.

Can a bookkeeper submit the tax return?

An appropriately authorised agent can assist or submit, but the sole trader remains responsible for accuracy and deadlines.

Is a spreadsheet enough?

It may be for a simple business, but MTD users need compatible submission and digital-link arrangements. Complexity may make accounting software safer.

Official source

See HMRC’s self-employed business-record guidance and current MTD eligibility rules.