Overview

If you鈥檙e self-employed, your business will have various running costs. You can deduct some of these costs to work out your taxable profit as long as they鈥檙e allowable expenses.聽

For example, if your turnover is 拢40,000 and you claim 拢10,000 in allowable expenses, you鈥檒l only pay tax on the remaining 拢30,000 - known as your taxable profit.

This guide is also available in Welsh (Cymraeg).

Allowable expenses do not include money taken from your business to pay for private purchases.

If you run your own limited company, you need to follow different rules. You can deduct any business costs from your profits before tax. You must report any item you make personal use of as a company benefit.

Costs you can claim as allowable expenses

These include:

You cannot claim expenses if you use your 拢1,000 tax-free 鈥榯rading allowance鈥�.

Contact the Self Assessment helpline if you鈥檙e not sure whether a business cost is an allowable expense.

Costs you can claim as capital allowances

If you use traditional accounting, claim capital allowances when you buy something you keep to use in your business, for example:

  • equipment
  • machinery
  • business vehicles, for example cars, vans, lorries

You cannot claim capital allowances if you use your 拢1,000 tax-free 鈥榯rading allowance鈥�.

If you use cash basis

If you use cash basis accounting and buy a car for your business, you can claim this as a capital allowance. However, all other items you buy and keep for your business should be claimed as allowable expenses in the normal way.

If you use something for both business and personal reasons

You can only claim allowable expenses for the business costs.

Example

Your mobile phone bills for the year total 拢200. Of this, you spend 拢130 on personal calls and 拢70 on business.

You can claim for 拢70 of business expenses.

If you work from home

You may be able to claim a proportion of your costs for things like:

  • heating
  • electricity
  • Council Tax
  • mortgage interest or rent
  • internet and telephone use

You鈥檒l need to find a reasonable method of dividing your costs, for example by the number of rooms you use for business or the amount of time you spend working from home.

Example

You have 4 rooms in your home, one of which you use only as an office.

Your electricity bill for the year is 拢400. Assuming all the rooms in your home use equal amounts of electricity, you can claim 拢100 as allowable expenses (拢400 divided by 4).

If you worked only one day a week from home, you could claim 拢14.29 as allowable expenses (拢100 divided by 7).

Simplified expenses

You can avoid using complex calculations to work out your business expenses by using simplified expenses. Simplified expenses are flat rates that can be used for:

  • vehicles
  • working from home
  • living on your business premises