Use of home as office: flat rate calculator
If you work from your kitchen table, there is a flat monthly amount you can claim without splitting your gas bill. It depends on how many hours you work at home.
Use of home as office: flat rate calculator
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The three bands
From 25 to 50 hours a month you can claim £10, from 51 to 100 hours £18, and from 101 hours £26. Fewer than 25 hours and the flat rate is not available.
Phone and internet are separate
The flat rate does not cover them. You can claim those separately, on actual costs, for the business share.
A choice for the year
You can instead claim a fair share of your actual household costs. The flat rate is the simple option; work out both if you are working long hours at home.
Figures for the 2026/27 tax year, checked 25 October 2026. Sources: Simplified expenses: working from home. An estimate, not advice. SideTill is not tax software.
Keep the number for every month
SideTill is the simple record of your side hustle: log the job, send the invoice, record the money when it comes in, and see whether the month actually made you money. It also shows your best month, so you can tell a bad month from a bad habit.
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Questions
Do I need a separate room?
No. The flat rate is for working at home, not for having an office. Keep a rough record of your hours.
Can I claim this and the trading allowance?
No. Using the £1,000 trading allowance means you do not claim expenses.
What if my hours change month to month?
Work out each month by its own hours.