Claim Home Office Expenses and Business Mileage as a Sole Trader
Sole traders in the UK can claim both home office expenses and business mileage to reduce their taxable profits using either simplified flat rates or actual expenses.
Yes, you can claim both use of home as an office and business mileage if you are a self-employed sole trader. HM Revenue and Customs (HMRC) permits you to claim these essential business deductions simultaneously, provided you meet the necessary eligibility criteria. You can choose to calculate these deductions using either simplified flat-rate methods or actual cost apportionments to offset your Self Assessment tax bill.
Key Takeaways
- Sole traders can deduct both home workspace costs and business travel expenses from their self-employed turnover.
- The use of home as an office can be claimed using HMRC simplified flat rates or by calculating actual household bills.
- Business mileage claims can use the flat-rate scheme (increasing to 55p per mile from 6 April 2026) or actual running costs.
- You must keep accurate business records, including mileage logs, to support your claims during an HMRC audit.
Can I claim use of home as an office and business mileage?
Yes, sole traders can claim both use of home and business mileage if they qualify under HMRC guidelines. These two expenses represent separate business costs that are wholly allowable to reduce your taxable income.
Under United Kingdom tax rules, your home serves as your administrative base, allowing you to claim home running costs. When you travel from this base to visit clients, suppliers, or temporary worksites, those journeys count as business mileage. HMRC offers simplified flat-rate scales alongside detailed actual expense calculations for both claims, allowing you to select the structure that best suits your business operations.
How do I claim use of home as an office?
You can calculate your home office claim by using the simplified flat-rate scheme or by apportioning your actual household utility bills. You must choose one method for each tax year and cannot combine both options for the same period.
The simplified expenses system for home offices is governed by Section 94H of the Income Tax (Trading and Other Income) Act 2005 (ITTOIA 2005). Under this system, you do not need to keep utility receipts. Instead, you declare a fixed monthly deduction based purely on the number of hours you work from home each month.
| Hours worked from home per month | Monthly flat rate allowable |
|---|---|
| 25 to 50 hours | £10.00 per month |
| 51 to 100 hours | £18.00 per month |
| 101 hours or more | £26.00 per month |
What are the rules for claiming actual household costs?
To claim actual costs, you must calculate the business proportion of your bills, such as electricity, heating, water, and broadband. You typically calculate this by dividing your total household expenses by the number of rooms you use, multiplied by the percentage of time those rooms are used for work purposes.
Care must be taken when designating space for work. If you dedicate a room exclusively to business use, you risk losing your Capital Gains Tax (CGT) private residence relief on that portion of the property when selling your home. Ensuring the room has a secondary domestic purpose, such as a guest bedroom or play area, helps preserve your full tax relief.
How do I claim business mileage as a sole trader?
You claim business mileage by using either HMRC simplified mileage allowances or by tracking the exact running costs of your vehicle. The chosen method must remain consistent for that specific vehicle throughout its entire business lifespan.
The statutory framework for simplified mileage rates is detailed under Sections 94D to 94F of the Income Tax (Trading and Other Income) Act 2005 (ITTOIA 2005). Mileage rates are designed to cover all vehicle expenses, including fuel, depreciation, insurance, road tax, and servicing. The rates undergo adjustment over different tax years.
| Vehicle Type | Rate for 2025/26 Tax Year | Rate from 6 April 2026 Onwards |
|---|---|---|
| Car or goods vehicle (First 10,000 miles) | 45p per mile | 55p per mile |
| Car or goods vehicle (Over 10,000 miles) | 25p per mile | 25p per mile |
| Motorcycle (All business miles) | 24p per mile | 24p per mile |
Are actual vehicle costs better than simplified mileage?
The actual cost method may yield a larger tax deduction if you run a vehicle with high fuel consumption, steep insurance premiums, or heavy repair bills. This method requires you to calculate all your annual running costs and apply the percentage of miles driven strictly for business.
However, you face statutory limitations depending on your past claims. If you have previously claimed capital allowances for a vehicle, you are legally barred from using simplified mileage rates for that vehicle. You must continue using the actual costs method until you sell or replace it.
What are the strict HMRC rules for claiming both?
To claim home office and mileage expenses, you must comply with strict HMRC rules regarding business travel, work location, and record-keeping. Failure to meet these legal parameters can lead to disallowed deductions and penalties under Self Assessment.
- The Wholly and Exclusively Rule: Under HMRC SA103F guidelines, any expense you claim must be incurred wholly and exclusively for the purposes of your trade. Personal or dual-purpose elements of an expense must be separated out and excluded from your tax return.
- Ordinary Commuting Exclusions: You cannot claim travel costs for ordinary commuting. Traveling between your domestic home and a permanent, regular place of business is disallowable, though journeys from your home office to temporary worksites or client locations are fully allowed.
- Comprehensive Record-Keeping: You must keep accurate records of your journeys and hours worked to justify your tax calculations. Even if your turnover is under the £90,000 VAT threshold and you only submit total figures, HMRC can audit and demand proof for your claims.
Can I claim both simplified expenses and actual costs for different vehicles?
Yes, you can use simplified mileage rates for one business vehicle and the actual cost method for a different vehicle. However, once you choose a method for a specific vehicle, you must stick to that method for the entire time you use it in your business.
Does claiming use of home as an office affect Capital Gains Tax when I sell my house?
It will only affect your Capital Gains Tax if you set aside a room exclusively for business use. To avoid losing your Private Residence Relief, ensure that your workspace retains a dual domestic purpose, such as acting as a library or guest room when you are not working.
Can I claim travel expenses for commuting from my home to a client's regular office?
You can only claim travel expenses if your home is your genuine base of business operations and you travel to a customer's site to perform a temporary task. Regular, predictable commuting to a single fixed client location over a long period may be treated as disallowable commuting.
Do I need to keep petrol receipts if I use HMRC simplified mileage rates?
No, you do not need to keep fuel receipts when claiming simplified mileage rates. Instead, you must maintain a journey log that documents the date, destination, purpose, and exact mileage of each business trip to validate your claim.