Renting a Room to Your Business: Home Office Expenses the Self-Employed Can Claim

A sole trader cannot rent a room in their own home to their own business, because a sole trader and the business are the same legal person and no rent can pass between them. Home office expenses for the self-employed are claimed instead as a deduction from trading profit, using either HMRC's simplified flat rate or a proportion of your actual household running costs. The rental agreement idea does work, but only for a director letting space to their own limited company, which is a separate legal entity. Blue Tick Accountants, a Guildford-based UK tax advisory and accountancy practice, sees this confusion regularly, and the cost of getting it wrong is usually a claim far smaller than it should be. This guide explains why the rent route fails for sole traders, sets out the two methods HMRC permits, works through the numbers on a real household, and shows when the licence agreement approach genuinely applies.

Key Takeaways

• A sole trader cannot charge rent to their own business, because an unincorporated business has no legal identity separate from its owner.
• HMRC's simplified flat rate for working from home is £10 a month for 25 to 50 hours, £18 a month for 51 to 100 hours, and £26 a month for 101 hours or more in 2026/27.
• The actual cost method apportions household running costs by number of rooms and by business use, and usually produces a larger deduction than the £312 annual flat rate ceiling.
• A director of a limited company can grant a licence to occupy and charge the company rent, but that rent is taxable property income on the director's own tax return.
• Sole traders with qualifying income above £50,000 have been inside Making Tax Digital for Income Tax since 6 April 2026, which raises the standard of home office record keeping.

Can a self-employed person rent a room to their own business?

No. A sole trader and their business are one and the same person in law, so any rent charged would be money moving from one pocket to another with no tax consequence. HMRC will not accept a deduction for it, and there is no corresponding property income to declare because no transaction has occurred. Partnerships sit slightly differently: a partner who personally owns premises can charge the partnership rent, though that has consequences for Business Asset Disposal Relief on a later sale and is rarely worth it for a spare bedroom.

What HMRC does allow, under the use of home as office rules, is a deduction for the additional costs you incur because you work from home. That deduction sits alongside the other expenses a sole trader can deduct and reduces both income tax and Class 4 National Insurance. The mechanism is a deduction, not rent, and the distinction changes the evidence you need to keep.

What are the two ways to claim home office expenses if you are self-employed?

HMRC permits two methods: the simplified flat rate based on hours worked at home, and the actual cost method based on a fair proportion of household bills. You may use whichever gives the better result and may switch between them from one tax year to the next, but you cannot mix the two within a single year for the same costs.

The flat rate is £10 a month for 25 to 50 hours of home working, £18 a month for 51 to 100 hours, and £26 a month for 101 hours or more, a maximum of £312 for a full tax year to 5 April. It covers heat, light and power only, so business telephone and broadband use can be claimed on top. The actual cost method needs better evidence but captures council tax, insurance, water and a share of mortgage interest as well, which is why it almost always wins for anyone working from home full time.

How do you calculate the actual cost method, with a worked example?

The actual cost method divides household running costs by the number of rooms in the property, then reduces the result to reflect how much of the time that room is used for business. Take a six-room house where one room is used as an office five days a week.

Annual running costs are council tax £2,100, buildings and contents insurance £360, gas and electricity £1,680 and water £480, a total of £4,620. Divided by six rooms, the office share is £770. Reduced to five days in seven, the claim becomes £550. Broadband costs £420 a year and is used half for business, adding £210. The total home office claim is £760.

Against the £312 flat rate, the actual cost method is £448 better. For a basic rate taxpayer paying 20% income tax and 6% Class 4 National Insurance, that extra £448 is worth £116.48 in tax, for no cost beyond keeping the bills.

When does the licence agreement route actually work?

The rent route works only when occupier and owner are genuinely different people, which in practice means a director letting space to their own limited company. The company pays rent under a written licence to occupy, deducts it against profits before corporation tax, and the director declares the rent as property income, offsetting the associated household costs. Set at a commercial level the net effect is close to neutral for the director and a real deduction for the company.

Anyone weighing this up is usually weighing up trading structure more broadly, and the wider comparison between operating as a sole trader and incorporating matters far more to the overall tax bill than the treatment of one room. Do not incorporate for a home office deduction alone.

How does Making Tax Digital change home office record keeping?

Making Tax Digital for Income Tax applies to sole traders and landlords with qualifying income above £50,000 from 6 April 2026, falling to £30,000 from 6 April 2027 and £20,000 from 6 April 2028. Qualifying income is gross turnover and rent before expenses, not profit, so a sole trader billing £52,000 and taking home £31,000 is already in scope.

For those inside the regime, home office costs must be captured in digital records and reported through quarterly updates due on 7 August, 7 November, 7 February and 7 May, with a final declaration by 31 January. Annual apportionments can be finalised at the declaration stage, but a shoebox of receipts opened the following January no longer works. A spreadsheet or bookkeeping app updated monthly also makes the actual cost method much easier to defend, as our guide to quarterly reporting for sole traders explains.

Frequently Asked Questions

Can I charge my own business rent for using a room at home?

Not if you are a sole trader. A sole trader and the business are the same legal person, so rent between them has no tax effect and HMRC will refuse the deduction. A director of a limited company can charge rent under a licence to occupy, because the company is a separate legal entity, but that rent is taxable property income for the director personally.

How much can I claim for working from home in 2026/27?

HMRC's simplified flat rate is £10 a month for 25 to 50 hours of home working, £18 a month for 51 to 100 hours and £26 a month for 101 hours or more, a maximum of £312 a year. The actual cost method has no cap and typically produces a larger figure, often £600 to £900 for someone working from home full time.

Does claiming a home office affect capital gains tax on my house?

Only if a room is used exclusively for business, which removes that part of the property from private residence relief. Claiming a proportion of costs for a room also used privately in the evenings or at weekends preserves the relief in full. Most self-employed people should deliberately keep some private use of the room.

Can I claim mortgage interest as a home office expense?

A proportion of mortgage interest is allowable for a self-employed home working claim under the actual cost method, apportioned by rooms and business use. Capital repayments are never allowable. Rent paid on a property you do not own is allowable on the same apportioned basis, as are council tax, insurance, water, heat and light.

How Blue Tick Can Help

Blue Tick Accountants advises sole traders across the UK on home working claims, comparing the flat rate against a full actual cost calculation and documenting the result so it stands up to scrutiny. Where incorporation genuinely makes sense, the practice also drafts the licence to occupy and sets a defensible commercial rent. Head to our website and book a meeting now.

Conclusion

The rent a room idea fails for sole traders for a simple legal reason, but the deduction it was reaching for is available anyway and is usually worth more. Run the actual cost calculation once, compare it against the £312 flat rate ceiling, and claim whichever is higher. With Making Tax Digital live above £50,000, the records supporting the claim need to exist as you go.

About the Author

This guide was written by Leon, founder of Blue Tick Accountants, a Guildford-based UK tax advisory and accountancy practice that helps self-employed people, landlords and limited company owners across the UK. It was last reviewed for the 2026/27 tax year.

This article is intended for general informational purposes only and does not constitute tax, legal, or financial advice. Tax rules are subject to change and their application will depend on your individual circumstances. You should always seek advice from a qualified professional before taking action. Blue Tick Accountants accepts no liability for decisions made on the basis of this content.

Related reading: Home Office Costs and Capital Gains Tax: The Risk of Claiming Too Much.