Keep business records as a sole trader

As a sole trader, you are legally required to keep accurate business records. Good record-keeping helps you complete your Self Assessment tax return correctly and protects you if HMRC investigates your affairs.

Why record-keeping matters

Your records must be sufficient to:

• Calculate your taxable profit accurately
• Support all figures on your Self Assessment tax return
• Demonstrate your tax affairs are correct if HMRC asks questions

Failing to keep adequate records can result in penalties of up to £3,000 per tax year. It also makes it harder to claim all your allowable expenses, potentially costing you more in tax.

What records you must keep

Your records fall into three main categories: income, expenses, and financial position.

Digital vs paper records

You can keep records on paper or digitally. Digital records have several advantages:

• Easier to search: Find specific transactions quickly
• Less storage space: No boxes of receipts to store
• Backup options: Cloud storage protects against loss
• MTD ready: You will need digital records when Making Tax Digital applies to you

Acceptable digital formats:

• Photos or scans of receipts
• Spreadsheets tracking income and expenses
• Accounting software (QuickBooks, Xero, FreeAgent, etc.)
• Receipt capture apps that store images with transaction data

If you photograph receipts, ensure the image is clear and legible. Thermal paper receipts fade over time, so scanning them soon after receipt is advisable.

How long to keep records

The retention period is calculated from the Self Assessment deadline, not the end of the tax year.

Examples of retention periods

If HMRC opens an enquiry: Keep all records until the enquiry concludes or HMRC loses the power to investigate. Do not destroy any records while an enquiry is ongoing.

Organising your records

A simple, consistent system works best. Consider:

By tax year

• Create a folder for each tax year (e.g., "2024-25")
• Within each year, separate income and expenses
• Keep bank statements with their matching month's transactions

By category

• Income: Sales invoices, till records, bank deposit slips
• Expenses: Receipts organised by type (travel, materials, office, etc.)
• Assets: Purchases of equipment, vehicles, computers
• VAT: Separate folder if VAT registered
• PAYE: Separate folder if you have employees

Reconciliation: Regularly check your records against bank statements. This catches errors early and makes year-end much simpler.

Preparing for Making Tax Digital

Making Tax Digital for Income Tax (MTD for ITSA) requires sole traders above certain income thresholds to keep digital records and submit quarterly updates to HMRC.

What MTD means for your record-keeping

When MTD applies to you, you must:

• Keep business records digitally using MTD-compatible software
• Submit income and expense summaries to HMRC each quarter
• Submit a final declaration (replacing your traditional tax return)

Start using accounting software before MTD becomes mandatory for you. This gives you time to:

• Learn the software without deadline pressure
• Set up your chart of accounts properly
• Develop consistent data entry habits
• Identify any issues with your current record-keeping

What happens if records are inadequate

If HMRC finds your records are not sufficient to support your tax return, several consequences may follow:

• Penalties: Up to £3,000 per tax year for inadequate records
• Estimated assessments: HMRC may estimate your income if you cannot prove it
• Additional tax: Estimated figures typically favour HMRC, increasing your tax bill
• Longer enquiries: Investigations take longer without proper records

The cost of an accountant or bookkeeper to help organise your records is almost always less than the penalties and additional tax from poor record-keeping.