Work from home expenses: how should I handle them here?

If you work from home, this guide explains how to think about expenses without over-claiming and how to keep the calculator input clean.

Keep the calculator input as profit after allowable expenses, not a list of costs.
Home working is often mixed use; use a consistent method and keep evidence.
Use GOV.UK as the source of truth for the current rules.

How to translate to a profit number

If you track home working costs separately, the calculator still only needs the final annual profit. Apply your method in your records, then enter profit.

Common mistakes

Overstating costs by treating personal household spending as fully business, or failing to keep a consistent approach across the year.

A safe workflow

Use the calculator for planning, then confirm the correct treatment on GOV.UK when you file.

Not tax advice. This page is an educational guide. For official rules, verify the sources below.

Open self-employed calculator How this is maintained

Last updated: 2026-04-20

FAQ

Does this tool ask for rent or bills?

No. It only needs profit.

Is the output guaranteed?

No. It is an estimate for planning.

Where should I verify home working rules?

Use the GOV.UK expenses guidance for working from home.

Sources

For official rules and definitions, verify with the references below.

https://www.gov.uk/expenses-if-youre-self-employed/work-from-home