How to Claim Working From Home Tax Relief

If you work from home, you can claim tax relief on your home office expenses with HMRC — whether you're an employee, self-employed, or a company director. The relief reduces the tax you pay, either directly via your payslip or as a refund when you file your tax return. For 2025/26, you have two main options: a simple flat-rate claim (no records needed) or a detailed claim for actual expenses. Our guide on the tax implications of working from home covers the broader context; this post focuses on the mechanics of claiming relief.

Who can claim working from home tax relief?

You can claim if:

• You're an employee and regularly work from home (either by necessity or contractually required)
• You're self-employed and use part of your home as your office
• You're a company director and work from home

The word "regularly" is key — a single day WFH doesn't count, but a consistent pattern does. Two days per week is clearly sufficient. One day per week is borderline; three days and you're entirely safe.

Employees claim via their tax return or by asking HMRC to adjust their tax code. This either reduces the tax taken from your payslip or gives you a refund when you file.

Self-employed people claim on their Self-Assessment tax return, offset against profits for the year.

Directors follow the same process as self-employed — the relief sits on your corporation tax return.

How much working from home tax relief can you claim?

The amount depends on which method you use.

The flat-rate method

You claim £3 per week, or £156 per year (pro-rated for partial years). No receipts needed. No questions asked.

If you're a basic-rate taxpayer (20%), that saves you £31.20 in tax per year. A higher-rate taxpayer (40%) saves £62.40. The simplicity of the flat rate is its superpower — you don't need to track your water bills or take meter readings. It's designed to cover a reasonable estimate of your utilities, council tax, and broadband.

The actual expenses method

You calculate the real cost of running your home office — a proportional share of rent, mortgage interest, council tax, utilities, broadband, phone, buildings insurance, contents insurance, and equipment like a desk, chair, or filing cabinet.

The proportion depends on how much of your home you use for work. Example: you rent a two-bedroom flat for £1,000 per month and use one room as your office. Your annual rent is £12,000. One room out of two is 50% of your living space, so you claim 50% of rent: £6,000. At the 20% basic-rate tax relief, that's £1,200 in tax relief — far better than the flat rate.

The catch: HMRC scrutinizes actual expense claims more closely than flat rates. You must keep supporting records (council tax bills, utility statements, photos of your workspace) for at least 6 years. If HMRC asks, you need to produce them.

Which method is better? The flat rate wins if your proportional share of expenses is small (e.g. you own your home outright, or you use only one room part-time). Actual expenses win if you rent or have high utility bills. Most employees use the flat rate for speed; self-employed people and directors often use actual expenses to maximize relief.

What expenses qualify?

Flat-rate claim (£3/week)

You don't itemize anything. No list of qualifying expenses needed.

Actual expenses — the qualifying list

Does qualify:

• Rent or mortgage interest (your proportional share only)
• Council tax (proportional share)
• Utilities: electricity, gas, water (proportional share)
• Broadband and phone line (if used for work)
• Buildings insurance (proportional share)
• Contents insurance (covering work equipment)
• Furniture and equipment: desk, chair, shelving, filing cabinets, desk lamp, monitor
• Software subscriptions: accounting software, project management, web hosting (if self-employed)

Doesn't qualify:

• Groceries or food
• Entertainment subscriptions
• Clothing
• Car expenses (unless you're driving for business meetings)
• Mortgage capital repayment (only interest)
• General household furniture (unless exclusively work-related)

The principle: HMRC wants the "clear business purpose" portion of your home. If you use your home office 40 hours per week out of a 168-hour week, that's roughly 24% of your time and space — claim that proportion.

Step-by-step: how to claim working from home tax relief

For employees

1. Register for Self-Assessment (if not already registered) via HMRC's website. It's free and takes 10 minutes online.
2. Log into your HMRC account (via Government Gateway, sign in with your National Insurance number and password).
3. Navigate to "Tell us about your employment" under the Self-Assessment section.
4. Select "Add information about your working arrangements" — yes, that's the actual button HMRC uses.
5. Choose your method: flat rate (£3/week) or actual expenses.
6. Provide the dates you worked from home during the tax year (6 April to 5 April).
7. File your return by 31 January after the tax year ends. HMRC calculates your relief and either adjusts your tax code or issues a refund.

If you're not confident using HMRC's online portal, call HMRC's Self-Assessment helpline (0300 200 3310, weekdays 8am–8pm).

For self-employed people

1. Complete your Self-Assessment tax return — either via a qualified accountant, HMRC's own forms, or online software.
2. In the "profit and loss" section, add your home office claim as an allowable expense.
3. If using flat rate: Enter "home office" as a line item with £156 (or pro-rated amount for partial years).
4. If using actual expenses: Provide a detailed breakdown (rent £6,000, utilities £800, insurance £200, etc.) and keep supporting evidence.
5. Submit by 31 January following the end of the tax year. Your relief reduces your taxable profit, which in turn reduces Income Tax, National Insurance, and (if applicable) Corporation Tax.

For company directors

Follow the same Self-Assessment process as self-employed, OR claim the relief against your company's taxable profit (your accountant will advise). Some directors claim both as an employee (if they also draw a salary) and as a company expense — double-check with a tax professional to avoid over-claiming.

Common mistakes when claiming WFH tax relief

Mistake 1: Not claiming at all. Many employees don't realize they can claim. Even the flat rate of £3/week (£156/year) is better than nothing. If you've worked from home for five years without claiming, you can backdate your claim and recover relief from the past four years.

Mistake 2: Over-claiming. HMRC flags claims that are out of proportion to your income or working pattern. A £15,000 home office claim when your salary is £25,000 raises questions. Keep claims reasonable and defensible by using real expense figures.

Mistake 3: Forgetting to keep records. If you use actual expenses and HMRC asks to see your working, you must produce evidence. Digital photos of utility bills, bank statements, emails from your landlord — all are acceptable. Paper receipts are fine too, but HMRC is increasingly comfortable with digital records.

Mistake 4: Claiming too late. You can reclaim up to four years of relief via HMRC's adjustment process. Many people work from home for years without realizing they can claim. Contact HMRC to backdate your claim if you've missed years.

Mistake 5: Mixing personal and work space incorrectly. HMRC wants the "clear business purpose" portion. If your home office is one of five rooms and you use it 30 hours per week, don't claim 20% of all your home expenses (which would be 1/5). Claim based on how much time you spend working there, not just how many rooms you have.

Don't stop at WFH relief

Claiming working from home relief is just one part of tax efficiency. If you're self-employed or a director, you may also qualify for other reliefs. Read about tax-free allowances to understand your personal allowance and income tax thresholds. Professional subscriptions (memberships, training, certifications) are often overlooked but qualify for relief. If you have a partner earning less than you, the Marriage Allowance can save up to £252 per year. And if you're self-employed with higher income, pension contributions offer substantial tax relief at your marginal rate.

Frequently Asked Questions

Q: Do I need to work from home every day to claim? A: No. You need to work from home "regularly" — HMRC's guidance considers two days per week a comfortable threshold. One day per week is less clear; three days per week and you're completely safe.

Q: What if my employer already reimburses my home office costs? A: You can't claim the same costs twice. If your employer reimburses broadband and council tax, you can't claim them again via tax relief. But if they reimburse only part (e.g. broadband but not utilities), you can claim the unreimbursed portion.

Q: How do I handle a partial year? A: Pro-rate the amount. If you worked from home for six months, claim £1.50 per week (half of £3) or half your actual expenses. HMRC expects this breakdown on your return.

Q: How far back can I claim? A: Up to four years via an adjustment request to HMRC. Worked from home in 2021/22, 2022/23, 2023/24, and 2024/25? Claim all four years in one go. HMRC then calculates a combined refund.

Q: I use one room as both an office and a bedroom. What's the percentage? A: Claim only the work proportion. If you use the room as an office 9am–5pm on weekdays (40 hours) and as a bedroom at night and weekends (128 hours), that's roughly 24% work use. But HMRC typically expects conservatism — claim 30–50% to be safe and defensible.

Q: Will claiming trigger an HMRC enquiry? A: Unlikely. Flat-rate claims are low-risk because they're automated. Actual expense claims are reviewed more closely, but only if they're unreasonable or lack support. Read about what to expect from HMRC enquiries if you're worried — most are resolved by email.

Q: Can I claim as a company director? A: Yes. You claim the relief against your company's taxable profit, reducing Corporation Tax. Alternatively, if you draw a salary, you can claim as an employee separately. Your accountant will advise which route saves the most tax based on your salary and dividend strategy.

Q: What if my employer required me to work from home? A: You can still claim. The relief applies if you regularly work from home due to your job's nature. It doesn't matter whether you chose to work from home or were required to — the relief is based on the expense incurred, not the reason.

The bottom line: claiming working from home tax relief is straightforward. The flat rate is faster (no records), actual expenses can be larger (but require evidence). Either way, you're reclaiming tax on genuine work expenses. If you haven't claimed before, contact HMRC or use the online Self-Assessment portal to add a claim — you can recover up to four years of unclaimed relief in one go.