What Expenses Can a Sole Trader Claim in the UK?

As a sole trader, you are taxed on your business profit rather than your total sales. In simple terms, profit is your business income minus allowable business expenses. Recording those expenses accurately helps you calculate the right profit and avoid paying more tax than necessary.

HMRC's basic rule is that an expense must be incurred wholly and exclusively for the purpose of your trade. If a cost has both business and personal use, you can normally claim only the identifiable business proportion.

Common allowable expenses for sole traders

The exact costs depend on what your business does, but many sole traders regularly claim expenses in the following areas:

• Office and stationery: postage, printer ink, software subscriptions, business phone costs and small office items.
• Travel: business mileage, parking, train fares and accommodation for qualifying business trips. Ordinary travel between home and a permanent workplace is generally not allowable.
• Stock and materials: goods bought for resale and raw materials used to create products.
• Professional costs: accountancy, bookkeeping, legal fees and relevant business insurance.
• Marketing: website costs, online advertising, printed materials and other promotional activity.
• Staff costs: employee wages, employer National Insurance, pension contributions and subcontractor costs where relevant.
• Training: courses that update or develop skills used in your existing business. Training for an entirely new trade is usually treated differently.

Working from home

If you work from home, you may be able to claim a reasonable business share of costs such as heating, electricity, Council Tax, mortgage interest or rent, internet and telephone use. The calculation should reflect how much of the home you use for business and for how long.

HMRC also offers simplified expenses for certain home-working and vehicle costs. These use flat rates instead of detailed calculations. The simplest option is not always the most tax-efficient, so it is worth comparing the methods before choosing.

Vehicles and business travel

For a car or van used for both work and personal journeys, you can generally use either actual vehicle costs with a private-use adjustment or HMRC's simplified mileage method. Once you choose a method for a particular vehicle, restrictions can apply to switching, so consistency matters.

Costs you usually cannot claim

Personal drawings are not a business expense. You also cannot normally claim the private part of mixed-use purchases, fines for breaking the law, ordinary clothing or everyday food. Specialist clothing such as uniforms or protective wear may qualify, but normal clothes do not become allowable simply because you wear them for work.

Some larger purchases, such as equipment, machinery or a business vehicle, may be dealt with through capital allowances rather than deducted in the same way as day-to-day running costs.

What records should you keep?

Keep invoices, receipts, bank records and calculations that support the figures in your tax return. Your records should make it possible to see what you bought, when you bought it, how much it cost and why it related to the business. Digital copies are acceptable if they are complete, accurate and readable.

A separate business bank account is not legally required for every sole trader, but it makes record keeping and reconciliation much clearer. Reviewing transactions monthly also means missing receipts and unusual payments can be resolved while they are still fresh.

A simple monthly routine

1. Upload or file every business receipt.
2. Match expenses to bank transactions.
3. Separate any personal element from mixed-use costs.
4. Add notes for unusual or one-off purchases.
5. Review uncategorised transactions before closing the month.

Good expense records do more than support a tax return. They show where the business is spending money and make cash-flow decisions easier throughout the year.

This article provides general information, not personalised tax advice. Allowability depends on your circumstances and HMRC rules can change. Check current guidance or speak to a qualified adviser before making a decision.