Claim the maximum allowable home-office costs – flat rate or actual costs
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If you work from home you can usually claim something towards the extra household costs – but HMRC has several different methods, they depend on whether you're self-employed, an employee or a company director, and the rules changed from 6 April 2026. This calculator works out every method that applies to you side by side, tells you which ones you're actually allowed to use, picks the one worth the most and estimates the tax it saves. It also gives you a clear record of your hours and household bills to back up the claim.
See how it works
The sheets you will use most, in the order you will use them – shown with the sample data every workbook comes with.
Step 1
How much of your home is used for work, and the business share of each household bill (the 'actual costs' method). What you do: self-employed only: enter rooms, hours and the annual bills.
Step 2
Hours worked at home each month and the flat rate due for that month. What you do: self-employed only: enter the hours for each month.
Step 3
Step 4
Who it is for
Quick start
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Checkout takes a minute and you get a receipt by email.
Your download link arrives as soon as payment clears.
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Part of AML Finance Group
Our sister firm, AML Accountancy Solutions, is an award-winning accountancy practice helping businesses and individuals across the UK with their accounts, tax, bookkeeping and payroll.
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