Home office costs

Partial

If you do some of your business admin from home (invoicing, quotes, emails), you can claim a proportion of household costs. The simplest method is HMRC's flat rate, but you must work at least 25 hours per month from home to use it: £10/month (25-50 hours), £18/month (51-100 hours), or £26/month (101+ hours). Alternatively, calculate actual costs based on the proportion of rooms and time used for business. The flat rate does not include telephone or internet. Claim those separately on actual business use.

Key thresholds

Flat rate (minimum 25 hrs/month): £10/month (25-50 hrs), £18/month (51-100 hrs), £26/month (101+ hrs). Actual method: proportionate share of mortgage interest/rent, utilities, council tax.

Common questions

I do my quoting and invoicing from home. Can I claim anything?
Yes. Even occasional admin use qualifies. Use the flat rate (minimum £10/month) for simplicity, or calculate your actual costs.
I have a dedicated room I use only for my business. Can I claim more?
Yes. Actual costs based on that room's proportion of the total house are deductible. But be careful: exclusive business use of a room can trigger Capital Gains Tax on that proportion of the property when you sell.

Watch out for

—Exclusive business use of a room can affect Capital Gains Tax relief when you sell your home. Mixed-use rooms avoid this.
—If you rent, check your tenancy agreement. Some prohibit business use.

Exclusive business use of a room may affect Capital Gains Tax. Take advice before claiming on this basis.

HMRC sources

https://www.gov.uk/expenses-if-youre-self-employedhttps://www.gov.uk/simpler-income-tax-simplified-expenses/working-from-home

Last verified: May 2026 · Tax year 2026/27

Related expenses

Phone and internet costs
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This guidance is for general information only. Tax rules change. Verify with HMRC or a qualified accountant before filing.