If you are self-employed, claiming all of your allowable business expenses can reduce your taxable profit and, in turn, the amount of Income Tax you pay. Allowable expenses are costs that are incurred wholly and exclusively for the purposes of your business.

Typical business expenses that can be claimed include office costs such as stationery and telephone bills, travel expenses, business insurance, advertising and marketing, staff costs, stock and raw materials, and the running costs of your business premises. You may also be able to claim the cost of training courses that help you maintain or improve the skills needed for your business.

Where an expense is used for both business and personal purposes, you can only claim the business element. For example, if you use your mobile phone for both work and personal calls, only the business proportion of the bill is allowable.

If you work from home, you may be able to claim a proportion of household costs such as heating, electricity, internet, rent or mortgage interest, provided they relate to business use. Simplified expense allowances allow qualifying claimants to use flat rates for certain expenses, including working from home and business mileage, instead of calculating the actual costs.

If you purchase equipment, machinery or business vehicles, the cost may qualify for tax relief through capital allowances, depending on the accounting method you use.

If you claim the £1,000 trading allowance, you cannot also claim allowable business expenses. Keeping accurate records throughout the year will help ensure you claim all the tax relief you are entitled to while making it easier to complete your tax return.