You work from your spare bedroom three days a week. Your heating bills have doubled since you started freelancing. A client mentions they claim tax relief for working from home. You wonder: can you do the same? And if so, how much?
The answer is yes — but the amount you can claim depends on which method you choose, how many hours you work from home, and whether you are a sole trader or a limited company director.
Use of home as office is a tax relief that lets UK freelancers claim a portion of household running costs when you use your home for business. You can use HMRC's simplified flat rate (£10-£26 per month based on hours worked, no receipts needed) or calculate actual costs (proportion of heating, electricity, rent, mortgage interest, council tax, insurance — usually higher but needs more admin). Limited company directors use a different route: the company can pay you £6 per week tax-free or claim actual costs as a business expense.
This guide explains who can claim use of home as office (sole traders, partners, and limited company directors, but not employees from 2026/27 onwards), covers the two methods in detail (flat rate and actual costs), shows worked full-year GBP examples comparing both methods for a designer at an invented studio, breaks down what counts as household costs (heating, electricity, council tax, rent, mortgage interest, insurance, water) vs what you claim separately (broadband, phone, business equipment), explains mixed-use vs exclusive-use and the capital gains tax risk, walks through the limited company director route (£6/week employer-paid or actual costs via the company), includes a copyable monthly hours log template and record-keeping requirements, provides a quick decision checklist (when to pick flat rate vs actual costs), lists common mistakes (forgetting to claim broadband separately, claiming exclusive use without understanding CGT risk, not keeping an hours log), and finishes with FAQ and official sources.
Who can claim use of home as office
Sole traders and partners
If you are self-employed (sole trader or partner in a partnership) and you do genuine business work from home, you can claim use of home as office.
You qualify if:
✓ You work from home regularly (at least 25 hours per month for the flat rate method)
✓ You do core business activities at home (client work, admin, invoicing, planning)
✓ You incur additional household costs because of working from home
You do not need:
✗ A dedicated home office room (mixed-use spaces qualify)
✗ To use a room exclusively for business (though you can, with caution — see capital gains tax warning below)
Examples of qualifying work:
✓ A graphic designer working on client projects from a spare bedroom
✓ A web developer coding from the kitchen table
✓ A consultant preparing reports and proposals at home
✓ A photographer editing photos and managing admin from a home studio
Source: GOV.UK — Simplified expenses for working from home
Limited company directors
If you run a limited company and you are a director who works from home, you cannot use the simplified flat rate for sole traders.
Your options:
Option 1: Your company pays you £6 per week (£26 per month, £312 per year) tax-free under HMRC's homeworking allowance. No receipts needed. This is tax-free for you and corporation tax deductible for the company.
Option 2: Your company claims a proportion of actual household costs as a business expense. You will need receipts and must apportion costs by area and time used for business. The company pays you or reimburses the bills.
You cannot use both methods at the same time for the same costs.
Employees (removed from April 2026)
Important change: From 6 April 2026, employees can no longer claim the £6/week tax relief from HMRC for working from home.
What this means:
✗ If you are an employee (not self-employed or a director), you cannot claim use of home as office relief from HMRC for 2026/27 onwards
✓ Your employer can still pay you up to £6 per week tax-free for homeworking costs (this is not a statutory entitlement — employers choose whether to offer it)
✓ You can still claim retrospectively for tax years 2022/23 to 2025/26 (deadlines: 5 April 2027 to 5 April 2030)
Source: GOV.UK — Working from home tax relief removed from 6 April 2026
This guide focuses on sole traders and limited company directors. If you are an employee, speak to your employer about whether they offer the £6/week payment.
The two methods: flat rate vs actual costs
You can choose between two methods to claim use of home as office. Pick one method for the full tax year — you cannot switch halfway through.
Method 1: HMRC simplified flat rate (easiest)
How it works:
You claim a fixed amount per month based on the number of hours you work from home. HMRC sets the rates. You do not need receipts or bills.
Flat rate bands (2025/26 and 2026/27):
| Hours worked from home per month | Flat rate per month |
|---|---|
| 25 to 50 | £10 |
| 51 to 100 | £18 |
| 101 or more | £26 |
Maximum annual claim: £312 (£26 x 12 months)
What the flat rate covers:
✓ Heating
✓ Electricity
✓ Water
✓ General household running costs
What the flat rate does NOT cover:
✗ Broadband and internet
✗ Telephone and mobile phone
✗ Business equipment (laptop, desk, chair)
You must claim broadband and phone separately by working out the business proportion of those bills (see "What you can claim separately" below).
Example:
You work from home 70 hours per month for 10 months, and 40 hours per month for 2 months (quieter months).
- 10 months at 70 hours = 51-100 band = £18/month x 10 = £180
- 2 months at 40 hours = 25-50 band = £10/month x 2 = £20
Total flat rate claim: £200
Pros:
✓ Simple and fast — no receipts, no calculations
✓ HMRC rarely challenges flat rate claims
✓ No risk of capital gains tax on property sale
✓ You can work in any room (no need for exclusive use)
Cons:
✗ Fixed amounts may be lower than your actual costs (especially if you heat/power a large home office space)
✗ Does not include broadband or phone (claim those separately)
Source: GOV.UK — Simplified expenses: working from home
Method 2: Actual costs (higher but more admin)
How it works:
You calculate the business proportion of your household bills based on the area and time your home office uses. You need receipts and must keep records.
What you can claim:
✓ Heating (gas, electricity, oil)
✓ Electricity
✓ Water (if metered)
✓ Council tax
✓ Rent (if you rent your home)
✓ Mortgage interest (not capital repayments — interest only)
✓ Buildings and contents insurance
✓ General repairs and maintenance (decorating, roof repairs)
How to calculate the proportion:
Step 1: Work out the business proportion by area
If you use one room in a four-room house, the business proportion is 1/4 (25%).
Step 2: Adjust for time used
If you use that room for business 3 days per week, adjust the proportion: 25% x (3 days / 7 days) = 10.7% business use.
Step 3: Apply this percentage to your household bills
- Annual heating and electricity: £1,800
- Business proportion: 10.7%
- Claimable amount: £1,800 x 10.7% = £193
Do this for each bill (council tax, rent, mortgage interest, insurance, water, repairs).
Example calculation (full year):
| Bill | Annual cost | Business proportion | Claimable |
|---|---|---|---|
| Heating & electricity | £1,800 | 10.7% | £193 |
| Council tax | £1,400 | 10.7% | £150 |
| Mortgage interest | £6,000 | 10.7% | £642 |
| Buildings insurance | £300 | 10.7% | £32 |
| Water | £400 | 10.7% | £43 |
| Total | £1,060 |
Pros:
✓ Usually higher than the flat rate (especially if you have high bills or use a large portion of your home)
✓ Reflects your actual costs
Cons:
✗ Requires receipts and detailed records
✗ You must calculate the proportion every year
✗ HMRC may query your calculations during an audit
✗ If you claim exclusive use of a room, you may face capital gains tax when you sell your home
Source: HMRC Business Income Manual BIM47820 — Use of home for business
Which method should you pick?
Pick the flat rate if:
✓ You want simple bookkeeping (no receipts, no calculations)
✓ You work from home part-time or in a small space
✓ Your household bills are low
✓ You want to avoid capital gains tax risk
Pick actual costs if:
✓ You work from home full-time in a large space (e.g. dedicated home office room)
✓ Your household bills are high (large house, high heating costs, expensive mortgage)
✓ You are comfortable keeping detailed records and receipts
✓ You want to maximise your claim
Quick comparison:
If your actual costs calculation comes to more than £312/year, actual costs will save you more tax. If it is less than £312, stick to the flat rate (simpler and safer).
Use HMRC's simplified expenses checker to compare both methods before choosing (note: this tool is for vehicles, business premises, and use of home — select "use of home" option).
Worked example: flat rate vs actual costs (full tax year)
Here is a side-by-side comparison showing how much a UK freelance designer can claim using both methods.
Scenario
Freelancer: Harper at Northline Studio (sole trader, not VAT registered)
Home: 3-bedroom house in Manchester, rents £950/month
Home office: Spare bedroom (one of four main rooms)
Work pattern: Works from home 3 days/week (Tuesday, Wednesday, Thursday), around 75 hours/month
Tax year: 2026/27
Harper's household costs (annual)
| Bill | Annual cost |
|---|---|
| Rent | £11,400 |
| Council tax | £1,600 |
| Gas & electricity | £1,900 |
| Water | £420 |
| Contents insurance | £180 |
| Broadband | £360 |
| Mobile phone | £240 |
| Total household costs | £16,100 |
Method 1: Flat rate claim
Harper works 75 hours/month from home for all 12 months.
Hours band: 51-100 hours = £18/month
Annual flat rate claim: £18 x 12 = £216
Plus broadband and phone (business proportion):
Harper uses broadband 60% for business, 40% personal.
Harper uses mobile 80% for business, 20% personal.
- Broadband: £360 x 60% = £216
- Mobile: £240 x 80% = £192
Total flat rate claim: £216 + £216 + £192 = £624
Method 2: Actual costs claim
Step 1: Calculate business proportion by area
Harper uses 1 room out of 4 main rooms = 25%
Step 2: Adjust for time
Harper works 3 days per week = 3/7 = 43% of the week
Business proportion = 25% x 43% = 10.75%
Step 3: Apply percentage to household bills
| Bill | Annual cost | Business proportion | Claimable |
|---|---|---|---|
| Rent | £11,400 | 10.75% | £1,226 |
| Council tax | £1,600 | 10.75% | £172 |
| Gas & electricity | £1,900 | 10.75% | £204 |
| Water | £420 | 10.75% | £45 |
| Contents insurance | £180 | 10.75% | £19 |
| Subtotal household costs | £1,666 |
Plus broadband and phone (business proportion):
- Broadband: £360 x 60% = £216
- Mobile: £240 x 80% = £192
Total actual costs claim: £1,666 + £216 + £192 = £2,074
Comparison
| Method | Total annual claim | Tax saved (20% rate) | Tax saved (40% rate) |
|---|---|---|---|
| Flat rate | £624 | £125 | £250 |
| Actual costs | £2,074 | £415 | £830 |
Difference: £1,450 more claimed using actual costs
Winner: Actual costs saves Harper £290 more tax (at 20% rate) or £580 more (at 40% rate).
Why actual costs is better for Harper:
✓ Harper pays high rent (£950/month)
✓ Harper works from home regularly (75 hours/month, 3 days/week)
✓ The business proportion (10.75%) applied to high household costs produces a much larger claim than the flat rate
When flat rate would be better:
If Harper worked fewer hours (e.g. 30 hours/month), had lower household costs, or wanted to avoid keeping receipts, the flat rate would be simpler and possibly sufficient.
What counts as household costs vs business costs
Understanding what you can and cannot claim under "use of home as office" avoids mistakes and HMRC queries.
Household running costs (covered by flat rate or claimable under actual costs)
These are the costs the flat rate is meant to cover, or that you can claim a proportion of under actual costs:
✓ Heating (gas, oil, electricity for heating)
✓ Electricity (lighting, power for household use)
✓ Water (metered water charges if you pay them)
✓ Council tax (the property tax on your home)
✓ Rent (if you rent your home)
✓ Mortgage interest (interest only, not capital repayments — see below)
✓ Buildings and contents insurance (home insurance)
✓ General repairs and maintenance (redecorating, roof repairs, boiler service)
Mortgage interest vs capital repayments:
You can claim mortgage interest (the cost of borrowing), but not capital repayments (paying off the loan).
Example:
Your monthly mortgage payment is £800.
£600 is interest, £200 is capital repayment.
You can claim a proportion of the £600 interest only.
Source: HMRC BIM47820 — Use of home expenses
What you must claim separately (not covered by flat rate)
These costs are NOT included in the flat rate. You must calculate the business proportion and claim them separately, whether you use flat rate or actual costs:
✓ Broadband and internet
✓ Telephone and mobile phone
How to calculate the business proportion:
Broadband:
Estimate the percentage of time you use broadband for business vs personal use.
Example: You use broadband 60% for business (client work, email, research), 40% personal (streaming, social media).
Annual broadband cost: £360
Business proportion: £360 x 60% = £216 claimable
Telephone and mobile:
Claim the business proportion of line rental and the cost of business calls.
Example: You use your mobile 80% for business, 20% personal.
Annual mobile cost: £240
Business proportion: £240 x 80% = £192 claimable
HMRC guidance: If private use is not significant (e.g. you have a dedicated business mobile), you can claim the full cost.
Source: HMRC BIM47820 — Telephone and broadband
Business equipment and furniture (separate capital allowances)
These are NOT "use of home" costs. They are business equipment and you claim them under capital allowances or as business expenses:
✓ Laptop, computer, monitor
✓ Desk, chair, shelves
✓ Printer, scanner
✓ Stationery, software subscriptions
How to claim:
If the item costs less than £1,000 and you use it wholly for business, you can claim the full cost as an expense in the year you buy it.
If the item costs more than £1,000, you claim capital allowances (annual writing down allowance, typically 18% per year).
Mixed-use items (e.g. laptop used 70% business, 30% personal): Claim the business proportion only.
For more on equipment and capital allowances, see GOV.UK — Capital allowances for business equipment.
Mixed-use vs exclusive-use: the capital gains tax warning
This is the most important caution when claiming use of home as office.
Mixed-use (safe — no CGT risk)
Mixed-use means the room or space is used for both business and personal purposes.
Examples:
✓ Spare bedroom: you work during the day, guests sleep there sometimes
✓ Dining table: you work there in the morning, eat there in the evening
✓ Living room: you take client calls there, but also watch TV and relax
HMRC view: If the space has some personal use, it is not exclusively a business premises. You can claim a proportion of costs with no capital gains tax (CGT) risk when you sell your home.
This is the safest approach for most freelancers.
Exclusive-use (higher claim but CGT risk)
Exclusive-use means a room or space is used only for business, with no personal use at all.
Examples:
✓ A room you have converted into a dedicated office, never used for anything else
✓ A studio or workshop in your home used solely for business
HMRC view: If a room is exclusively business premises, that portion of your home is treated as a business asset. When you sell your home, you may face capital gains tax on the business proportion of the gain.
CGT calculation example:
You bought your house for £200,000, sell it for £400,000. Gain = £200,000.
You claimed 10% of your home as exclusive business use.
CGT applies to 10% of the gain = £20,000.
CGT at 18% (basic rate) or 24% (higher rate) = £3,600 to £4,800 owed.
Your main residence is normally CGT-free under Private Residence Relief. But if part of your home was used exclusively for business, that part loses the relief.
Source: GOV.UK — Private Residence Relief and business use
How to avoid CGT risk
Option 1: Use the flat rate method — no need to claim exclusive use, no CGT risk.
Option 2: Ensure some personal use of the space. Even occasional personal use (guests sleeping in the spare room once a month, eating dinner at the desk sometimes) is enough to prevent exclusive business use.
Option 3: Claim actual costs but apportion by time, not exclusive use. Calculate business use as a percentage of time (e.g. 3 days/week = 43%) rather than claiming a whole room is exclusively business.
Most UK freelancers avoid claiming exclusive use to protect their CGT exemption.
Limited company directors: the £6/week route and alternatives
If you run a limited company and you are a director who works from home, you cannot use the simplified flat rate for sole traders. Here are your options.
Option 1: Company pays £6 per week (simplest)
How it works:
Your company pays you £6 per week (£26 per month, £312 per year) for the additional household costs of working from home.
Key points:
✓ Tax-free for you (no income tax, no National Insurance)
✓ Corporation tax deductible for the company (reduces company profit)
✓ No receipts required — HMRC allows this flat rate without evidence
✓ The company records it as "homeworking allowance" in the payroll or as a director's expense
How to set it up:
- Your company board (or you, if you are the only director) approves the payment in a board minute
- The company pays you £26/month or £312 as a lump sum once a year
- Record it in the company accounts as "director homeworking allowance"
This is the most common method for small limited company directors.
Source: GOV.UK — Employment Income Manual EIM32760
Option 2: Company claims actual costs (higher but more complex)
How it works:
The company calculates the business proportion of your household costs (same method as sole traders — see "Actual costs" above) and either:
A) Pays you the calculated amount as a reimbursement (tax-free, corporation tax deductible), or
B) Pays the bills directly (e.g. company pays a portion of your rent or utility bills)
What the company can claim:
✓ Proportion of rent, council tax, utilities, mortgage interest, insurance (same as sole traders)
✓ Broadband and phone (business proportion)
Key caution:
If you rent a room to your own company (e.g. formal rental agreement, company pays you rent), HMRC may treat the room as a business premises. This can trigger:
✗ Business rates liability (instead of council tax)
✗ Capital gains tax when you sell the property
✗ Income tax on the rent you receive from your company
Most accountants advise against formal rental agreements between directors and their own companies. Stick to option 1 (£6/week) or a simple reimbursement of a proportion of costs without a formal tenancy.
Source: HMRC Business Income Manual BIM47800 — Use of home by directors
Can you claim both?
No. You cannot claim the £6/week payment and claim actual costs for the same household expenses. Pick one method for the tax year.
Example:
If your company pays you £6/week (£312/year), you cannot also claim a proportion of rent, council tax, and utilities on top. You have already claimed the flat rate.
However: You can claim the £6/week flat rate and claim broadband and phone separately (because the flat rate does not cover those).
Record-keeping and monthly hours log
HMRC requires you to keep records to support your use of home as office claim. What you need to keep depends on which method you use.
Records for flat rate method
You must keep:
✓ A log of hours worked from home each month (to prove you qualify for the flat rate band)
✓ Records of broadband and phone bills (to claim business proportion separately)
You do NOT need:
✗ Receipts for household bills (heating, electricity, rent, council tax) — the flat rate covers these without evidence
Records for actual costs method
You must keep:
✓ Receipts and bills for all household costs you claim (rent, mortgage statements, council tax, utility bills, insurance, repairs)
✓ A calculation showing how you worked out the business proportion (area used, time used, percentage applied to each bill)
✓ Floor plan or room count (to show the proportion of your home used for business)
✓ Records of broadband and phone bills (business proportion)
Copy-paste monthly hours log
Use this template to track your home working hours each month. Keep it in a spreadsheet or notebook.
Monthly Hours Log — Tax Year 2026/27
| Month | Hours worked from home | Flat rate band | Monthly claim |
|---|---|---|---|
| April 2026 | 80 | 51-100 | £18 |
| May 2026 | 95 | 51-100 | £18 |
| June 2026 | 110 | 101+ | £26 |
| July 2026 | 70 | 51-100 | £18 |
| August 2026 | 40 | 25-50 | £10 |
| September 2026 | 85 | 51-100 | £18 |
| October 2026 | 100 | 51-100 | £18 |
| November 2026 | 105 | 101+ | £26 |
| December 2026 | 50 | 25-50 | £10 |
| January 2027 | 90 | 51-100 | £18 |
| February 2027 | 75 | 51-100 | £18 |
| March 2027 | 88 | 51-100 | £18 |
| Total | 988 hours | £216 |
How to fill it in:
- At the end of each month, count the total hours you worked from home (include client work, admin, invoicing, planning — not lunch breaks or personal time)
- Check which band you fall into (25-50, 51-100, or 101+)
- Record the monthly claim
- Add up the total at the end of the tax year
If you use time-tracking software (like SoloPad, Toggl, or Clockify), you can export monthly reports showing hours worked from home. This counts as acceptable evidence for HMRC.
How long to keep records
Sole traders: Keep records for at least 5 years after the 31 January Self Assessment deadline for the relevant tax year.
Example: For tax year 2026/27, deadline is 31 January 2028. Keep records until at least 31 January 2033.
Limited companies: Keep records for at least 6 years from the end of the financial year.
Source: GOV.UK — Keeping records for Self Assessment
Decision checklist: which method and how to claim
Use this checklist to pick the right method and set up your claim.
Step 1: Who are you?
✓ Sole trader or partner → Use flat rate or actual costs (your choice)
✓ Limited company director → Use £6/week company payment or actual costs via company
✓ Employee → You cannot claim from HMRC from 2026/27 onwards (but your employer may pay £6/week)
Step 2: Pick your method (sole traders)
Pick flat rate if:
✓ You work from home part-time (25-101+ hours/month)
✓ You want simple bookkeeping (no receipts needed)
✓ Your household costs are low or average
✓ You want to avoid CGT risk
Pick actual costs if:
✓ You work from home full-time in a large space
✓ You have high household costs (rent, mortgage, heating)
✓ You are happy keeping detailed records and receipts
✓ You want to maximise your claim
Quick test: If your actual costs calculation comes to more than £312/year, use actual costs. If less, use flat rate.
Step 3: Set up record-keeping
Flat rate:
✓ Start a monthly hours log (see template above)
✓ Track hours worked from home each month
✓ Keep broadband and phone bills
Actual costs:
✓ Start a monthly hours log (if you want to apportion by time)
✓ Keep all receipts and bills for household costs
✓ Calculate the business proportion (area and time method)
✓ Keep broadband and phone bills
Step 4: Claim on your Self Assessment (sole traders)
When you complete your Self Assessment tax return:
- Go to the Self-employment (full) section
- Under Expenses, find Use of home as office
- Enter your total claim for the year
Flat rate example: You claimed £18/month for 10 months and £26/month for 2 months = £216. Enter £216 in "Use of home as office".
Actual costs example: Your household costs claim was £1,666 + broadband £216 + phone £192 = £2,074. Enter £2,074 in "Use of home as office".
Step 5: Record in company accounts (limited company directors)
If your company pays £6/week:
- Record it in the company accounts as "director homeworking allowance" or "use of home reimbursement"
- Deduct it as an expense in the company's Corporation Tax return
- You do not pay income tax or NI on this amount
If your company claims actual costs:
- Calculate the business proportion of household costs
- Record the payment or reimbursement in company accounts as "director expenses — use of home"
- Keep receipts and the calculation on file
- Deduct it as an expense in Corporation Tax return
Speak to your accountant if you are unsure how to record this correctly.
Common mistakes to avoid
Mistake 1: Forgetting to claim broadband and phone separately
What people think: "I claim the flat rate, so I cannot claim anything else."
The truth: The flat rate covers household running costs only. You can (and should) claim the business proportion of broadband and phone separately.
Fix: Add up your annual broadband and phone costs, work out the business percentage, and add that to your flat rate claim.
Mistake 2: Not keeping an hours log for flat rate
What people think: "The flat rate is £26/month, so I just claim £312 for the year without tracking hours."
The truth: HMRC expects you to track hours worked from home each month and claim the correct band (£10, £18, or £26). If you always claim the maximum without evidence, HMRC may challenge it.
Fix: Keep a simple monthly hours log (see template above).
Mistake 3: Claiming exclusive use without understanding CGT risk
What people think: "I have a dedicated office room, so I claim 25% of all household costs as exclusive business use."
The truth: If you claim a room is used exclusively for business, you may face capital gains tax on that proportion when you sell your home.
Fix: Ensure some personal use of the space, or use the flat rate method (no CGT risk).
Mistake 4: Claiming mortgage capital repayments
What people think: "My mortgage payment is £800/month, so I claim 10% of that (£80) under actual costs."
The truth: You can only claim mortgage interest, not capital repayments. Check your mortgage statement to see the split.
Fix: Only claim the interest portion of your mortgage payment.
Mistake 5: Switching methods halfway through the year
What people think: "I used flat rate for six months, then switched to actual costs because I realised it was higher."
The truth: You must pick one method for the full tax year. You cannot switch partway through.
Fix: Choose at the start of the tax year (April) and stick with it until the following April.
Mistake 6: Limited company directors claiming the sole trader flat rate
What people think: "I am a director and I work from home 80 hours/month, so I claim £18/month like sole traders."
The truth: Limited company directors cannot use the simplified flat rate for sole traders. You must use the £6/week company payment or actual costs via the company.
Fix: Set up a £6/week homeworking allowance payment from your company, or claim actual costs through company expenses.
Use of home as office and SoloPad
SoloPad tracks time worked on projects, exports monthly hours reports, and helps you log home working hours for HMRC flat rate claims.
Features:
✓ Time tracking by project and client
✓ Export monthly hours worked from home
✓ Attach hours log to your Self Assessment records
✓ Track which projects were worked on from home vs on-site
✓ Evidence your flat rate claim with exported reports
Pricing: Starter £5/month, Solo £12/month, Pro £29/month.
Questions? info@solopad.io
This is a short optional mention — you do not need time-tracking software to keep an hours log. A spreadsheet or notebook works fine.
FAQ
Can I claim use of home as office if I also rent a studio or co-working space?
Yes. You can claim use of home for the days you work from home, and claim rent for the studio separately. Just make sure you do not double-count the same costs (e.g. claiming both home office and studio rent for the same day).
What if I work fewer than 25 hours from home per month?
You cannot use the flat rate method. You can still use the actual costs method, but you must calculate the business proportion of your bills based on the area and time you use your home for business.
Can I claim if I live in a one-room flat?
Yes. Use the actual costs method and calculate the proportion of time you use the flat for business. For example, if you work 8 hours per day, 5 days per week, that is 40 hours out of 168 hours per week = 24% business use. Apply this to your rent, council tax, and utilities.
Do I need a separate business phone line to claim phone costs?
No. You can claim the business proportion of your personal phone line. If you use your mobile 80% for business, claim 80% of the cost. If you use it almost entirely for business, claim the full cost.
Can I claim if I occasionally work from a cafe or client site?
Yes. Use of home as office is for the hours you work from home. If you work 50 hours from home, 20 hours at a cafe, and 10 hours at a client site in one month, you claim the flat rate for the 50 home hours (£18 for the 51-100 band).
What if I claim the flat rate but my actual costs are lower?
That is fine. HMRC allows the flat rate as a simplification, even if your actual costs are lower. You do not need to prove your costs are higher than the flat rate.
Can my partner and I both claim use of home as office if we both work from home?
Yes, if you are both self-employed (each running your own business). Each of you calculates your own business proportion and claims separately. Do not double-count the same costs — apportion them between both businesses.
What counts as "working from home" — does admin and invoicing count?
Yes. HMRC counts any core business activity: client work, admin, invoicing, planning, marketing, bookkeeping. Lunch breaks, personal phone calls, and watching TV do not count.
Can I backdate my claim if I forgot to claim in previous years?
Yes. You can amend previous Self Assessment returns to add use of home as office claims, as long as you are within the four-year deadline from the 31 January submission date. For example, you can amend 2022/23 until 31 January 2027.
Does claiming use of home as office trigger a HMRC investigation?
No. It is a standard expense claim. HMRC may query your claim if the amounts are unusually high or you have no records, but legitimate claims with proper records are routine and low-risk.
Related guides
Use of home as office is one piece of managing your freelance finances. For the full picture, see:
- How to set freelance rates UK — Day rates, project rates, and hourly rates with worked examples
- Freelance time tracking software — UK time-tracking tools compared (with free options)
- Timesheet template UK — Copy-paste weekly and monthly timesheet templates
- When to register for VAT UK freelancers — The £90,000 threshold and when to register
- Freelance invoice template examples — Copy-paste UK invoice templates with GBP, VAT, and sort code
- Invoice payment terms UK — Net 14, Net 30, due dates, and late payment rights
If you work from a rented studio or co-working space, you can claim the rent and running costs of that space as a separate business expense (not "use of home"). Keep rent agreements and invoices.
Sources and references
This guide was written using the following official UK sources and keyword research:
- GOV.UK — Simplified expenses: working from home — Current flat rate bands (£10, £18, £26) for 2025/26 and 2026/27, confirmed 9 October 2026
- HMRC Business Income Manual BIM47820 — Use of home for business — Detailed guidance on actual costs method, what expenses are allowable, fixed vs running costs, council tax, mortgage interest, rent, repairs, telephone and broadband
- HMRC Business Income Manual BIM75010 — Simplified expenses: use of home — How simplified flat rate works, hours bands, optional vs mandatory
- GOV.UK — Tax relief for employees: working from home — Confirmation that employee relief removed from 6 April 2026 (no longer available for 2026/27 onwards)
- GOV.UK — Income Tax removal of tax relief on non-reimbursed homeworking expenses — Detail on removal of £6/week employee self-claim from 6 April 2026
- HMRC Employment Income Manual EIM32760 — Homeworking allowance for employees and directors — £6/week employer-paid amount, tax treatment, corporation tax deductibility
- GOV.UK — Tax when you sell your home (Private Residence Relief and business use) — Capital gains tax implications of exclusive business use
- GOV.UK — Keeping records for Self Assessment — 5-year record retention requirement for sole traders
- Ubersuggest UK keyword data (location ID 2826, 8 October 2026): "use of home as office" (720/mo, SD 24), "use of home as office allowance" (480/mo, SD 17), "allowance for use of home as office" (260/mo, SD 28), "hmrc use of home as office" (210/mo, SD 17), "use of home as office allowance 2025/26" (210/mo, SD 21), "use of home as office limited company" (110/mo, SD 19), "self employed use of home as office" (90/mo, SD 8), "simplified expenses" (390/mo, SD 32)
- Google Trends UK (12 months to October 2026): "use of home as office" flat baseline with January spike (Self Assessment deadline); top related queries: use of home as office allowance, hmrc use of home as office, limited company variant
Method note:
SERP competitors reviewed (not copied): GOV.UK simplified expenses page (only flat-rate table and one example), ACCA 2018 technical note (generic tax treatment), GOV.UK employee working from home page (employee relief only), Sigma Chartered lead-gen article (overview only, no worked examples), FreeAgent blog (August 2024, one room-count example), Crunch blog (overview), MSA Accountants (generic guidance), Ross Martin calculator (tool, no explanation). None provide:
✓ Side-by-side worked full-year GBP example comparing flat rate and actual costs for a UK freelancer (designer/developer)
✓ Detailed calculation of business proportion with area and time adjustment
✓ Explanation of what counts as household costs vs business costs (broadband, phone, equipment separate)
✓ Limited company director route (£6/week employer-paid vs actual costs via company, caution on renting a room to your own company)
✓ Capital gains tax warning with worked example of CGT on exclusive use
✓ Copyable monthly hours log template in table format
✓ Decision checklist for sole traders and directors
✓ Common mistakes (not claiming broadband separately, mortgage capital vs interest, switching methods mid-year)
All content, worked examples (Harper at Northline Studio), decision trees, monthly hours log template, calculations, and mistake list are original SoloPad editorial content. Invented studio names (Northline Studio) used in examples. All tax figures and flat rate bands verified against current GOV.UK and HMRC sources (9 October 2026).
This article is for general education. It is not tax, financial, or accounting advice. HMRC rules, simplified expenses rates, and capital gains tax treatment may vary by individual circumstances. When in doubt, consult an accountant or tax adviser. For HMRC queries, visit GOV.UK or call the Self Assessment helpline on 0300 200 3310.