Home Office Tax Deductions: What Sole Traders Can Claim
August 10, 2026 • 6 min read
If you work from home as a UK sole trader, you can claim tax relief on your household bills. Here's what you need to know about home office deductions.
Can You Claim Home Office Tax Deductions?
Yes — if you use part of your home "wholly and exclusively" for business purposes. This doesn't mean your entire home, just the area you use for work.
You can claim if:
- You work from home regularly (not just occasionally)
- You have a dedicated workspace (even if it's a corner of a room)
- Your workspace is used only for business (not personal use)
Two Ways to Claim
HMRC offers two methods for claiming home office costs. Choose whichever gives you the higher deduction:
Method 1: Simplified Expenses (Flat Rate)
Use HMRC's flat rate based on the number of hours you work from home:
- 25-50 hours/month: £10/month
- 51-100 hours/month: £18/month
- 101+ hours/month: £26/month
Pros: No receipts needed, simple to calculate
Cons: May not be the highest deduction
Method 2: Actual Costs
Claim a proportion of your actual household bills based on the space you use for work:
- Rent or mortgage interest
- Electricity and gas
- Water rates
- Council tax
- Home insurance
- Repairs and maintenance (proportionate)
Pros: Higher deduction if you have a large workspace
Cons: Requires calculations and record-keeping
How to Calculate Your Claim (Actual Costs)
- Calculate your total household costs for the tax year (bills, rent, etc.)
- Measure your workspace — calculate the floor area of your workspace as a percentage of your total home
- Apply the percentage to your total costs
- Example: If your workspace is 10% of your home, claim 10% of your bills
Example Calculation:
Total household costs: £5,000
Workspace: 12% of home
Claim: £5,000 × 12% = £600
What You Can't Claim
- Personal use: Only the business portion is claimable
- Capital costs: Renovations or extensions (claim capital allowances instead)
- Mortgage capital repayments: Only the interest portion is claimable
- Personal bills: Food, clothing, personal entertainment
Record Keeping Requirements
To support your claim, keep:
- Bills and receipts for all household costs
- Floor plan measurements showing your workspace
- Calculation records showing how you worked out the percentage
- HMRC records for at least 5 years
How Censitio Helps You Track Home Office Costs
- Import CSV bank statements — track all household bill payments
- Assign categories — separate home office costs from other expenses
- Export HMRC-ready Excel — include home office deductions on your Self Assessment
- Works offline — desktop version auto-categorizes with HMRC rules
No signup needed for web app • Windows desktop available