Working From Home: What UK Creators Can Actually Claim
Many creators default to the £312 flat rate and assume that is their entire working-from-home claim. It may not be. The flat rate covers household running costs — and an identifiable proportion of fixed property costs, plus phone and broadband, can potentially be claimed alongside it.
The quick answer
A home-working claim has three parts, and only one of them involves a choice.
Household running costs — electricity, heat, light, cleaning, metered water. Here you choose: HMRC's flat rate, up to £312 a year, or the business proportion of your actual costs.
Fixed property costs — council tax, insurance, mortgage interest and rent. These can potentially be claimed separately under the normal rules whether you use the flat rate or actual running costs, provided an identifiable business proportion exists. HMRC's guidance is explicit that using the flat rate does not prohibit a separate deduction for fixed costs.
Phone and broadband — not household costs at all, and claimed separately whichever route you take.
So the real question is not "flat rate or actual costs." It is whether you have identified the fixed-cost element at all — because for a full-time creator that can be the largest of the three, and it is easily missed.
This guide covers creators operating as sole traders. The rules for company directors are different and are not covered here.
The flat rate, and what it actually covers
Simplified expenses gives a fixed monthly deduction for household running costs, based on hours worked at home.
| Qualifying hours per month | Flat rate per month | If claimed all year |
|---|---|---|
| 25 to 50 | £10 | £120 |
| 51 to 100 | £18 | £216 |
| 101 or more | £26 | £312 |
Three conditions are worth knowing precisely.
The hours are not just "time at home." They are hours spent wholly and exclusively on core business activities in the home, which HMRC defines as providing goods or services, maintaining business records, and marketing and obtaining new business. For a creator, filming, editing, writing, record-keeping, pitching and genuine marketing or community work can count. Personal browsing does not — the activity's business purpose matters, not where you sit while doing it.
You need at least 25 qualifying hours in the month for any deduction. Below that, the flat rate is unavailable and you are back to an actual-cost claim.
It is optional and independent of your accounting method. You can use the flat rate whether or not you are on the cash basis, and the choice can be revisited each year.
If you have more than one home, they are treated as a single home for counting hours.
The appeal is that no apportionment of running costs is required. Note that this does not make the whole claim receipt-free: if you also claim a proportion of fixed costs, that part still needs evidence and a calculation.
Fixed costs: the part most creators miss
These are costs you pay whether or not you work from home — council tax, insurance, mortgage interest, rent, general repairs. Where part of the home is set aside solely for trade use for a specific period, a proportion is allowable, and HMRC says it will normally be appropriate to apportion by area and time.
Rent. The proportion of rent you pay your landlord attributable to business use. A sole trader cannot charge rent to their own trade — you cannot rent property to yourself.
Mortgage interest. Interest only; capital repayments are never allowable. See the cash basis point below.
Insurance. If business use is covered by a separate policy, that policy is allowed in full and none of the household policy is. Otherwise, a proportion of the household premium.
Repairs. General household repairs are apportioned — HMRC's example is exterior painting. But where a room is used solely for the trade, redecorating that room is wholly allowable, and decorating a room you never work in is not allowable at all.
Running costs, and why creators can often claim more
Running costs vary with use: cleaning, heat and light, metered water. If you are not using the flat rate, these are apportioned by reference to the facts of usage.
Electricity is where equipment-heavy creators do better than most sole traders. HMRC's manual contrasts a trader writing up records once a week in a spare bedroom with a commercial photographer working from home using specialist studio lighting — and says the photographer will have a much higher trade expense for electricity. It directs inspectors to take into account the number and nature of the power-consuming items involved.
If you run studio lighting, a desktop editing machine, monitors and charging kit for hours a day, an apportionment that reflects that usage may be more accurate than a flat floor-area fraction. That is the manual's own reasoning rather than an aggressive position — but it needs to be reasonable and you need to be able to explain it.
Two smaller points. Cleaning follows the facts: HMRC's example is a cleaner instructed to leave the office alone, in which case none of the cost is allowable. And metered water is generally not claimable where trade use is minor, on the basis that writing up records involves no trade use of water.
Where a claim is small and trade use is minor, HMRC will accept a reasonable estimate without detailed enquiry.
Phone and broadband are separate — and there is a shortcut
HMRC is explicit that telephone and broadband do not relate to the home itself and are not household expenses. They are claimed separately whether you use the flat rate or actual costs, which a lot of people miss.
The normal approach is the business proportion of line rental and connection costs, plus business calls in full. HMRC's own example is an author who claims a third of her phone standing charge because a third of her calls are business, and two-thirds of her broadband because two-thirds of her time online is business.
There is also a simplification worth knowing: where private use is not significant, the full cost of telephone and broadband can be claimed. HMRC states this directly. "Not significant" is doing real work in that sentence and it is a question of fact — but a dedicated business line, or a connection that is overwhelmingly a work tool, is worth considering rather than reflexively splitting everything down the middle.
The cash basis point on mortgage interest
Under the cash basis — the default for sole traders since 2024/25 — relief for interest and incidental costs connected with cash borrowing is generally limited to £500 for the trade period. That can include the allowable mortgage-interest element of a home-working claim.
Two refinements matter. Within that £500, no apportionment is required: HMRC's example is a bank loan used partly privately, where the full £500 is still deductible. And interest on purchases is treated differently — supplier trade credit, hire purchase or leasing of plant and machinery, and credit card interest on allowable purchases are not subject to the cap, though mixed-use items still need apportioning. So equipment finance should not automatically be counted towards the £500.
For a homeowner with a significant home-working claim, the cap is a real reason to look at whether the cash basis is the right method rather than defaulting into it.
The Capital Gains Tax question, and why the usual advice is wrong
You will have seen the warning: use a room exclusively for business and you lose part of your Private Residence Relief when you sell. It is real, but narrower than usually described.
What the legislation restricts. Section 224(1) TCGA 1992 excludes from relief only a part of the home used exclusively for trade purposes. HMRC's Capital Gains Manual states that a room used partly for business and partly for residential purposes will qualify in full for relief, and HS283 puts it plainly for taxpayers: working from home using a room also used for non-business purposes will not prevent entitlement to full relief.
Claiming income tax relief does not itself determine the CGT position. The manual gives the example of a guest-house kitchen: a proportion of heating and lighting may be deductible for income tax, but it does not follow that a similar restriction applies to the relief. It describes a private use fraction agreed for income tax as a poor guide to the apportionment required for CGT. The two calculations are separate. HMRC also tells inspectors that the exclusive use test is a stringent one and that they should not usually seek a restriction for a room with some measure of regular residential use.
The part that corrects common advice. The tip you will read everywhere is to keep a personal item in the room — a bookshelf, an armchair — so it is not "exclusively" business. HMRC's manual addresses this and rejects it: its example is a doctor who keeps private possessions in a room used as a surgery, and it says the surgery should still be regarded as exclusively in business use. Possessions are not use. What the manual points to is regular residential use of the room, occasional and very minor use being disregarded.
For most creators this is reassuring rather than alarming. A room that is genuinely part of the household outside working hours normally will not attract a restriction. But the CGT position turns on its own facts rather than on how you apportioned for income tax, and if you are creating a permanently rigged studio with no residential function, that is a conversation to have before rather than after.
A worked example
Illustration only, following the method in HMRC's own examples. Figures rounded. Not a personalised calculation.
Priya is a full-time creator renting a flat with five broadly comparable main rooms. One room is her studio and edit suite. It is set aside solely for work from 9am to 5pm, she actively works in it around six hours a day, and her household uses it for about two hours most evenings.
Her annual costs are £15,000 of fixed costs (rent, council tax, contents insurance) and £3,000 of household running costs (electricity, heat and light).
Following HMRC's approach, she apportions by room and then by time — and the time fraction is different for the two categories, because they measure different things:
Fixed costs: £15,000 × 1/5 = £3,000 attributable to the room. The room is dedicated for 8 hours and in household use for 2, so 8/10 of that is business: £2,400.
Running costs: £3,000 × 1/5 = £600 attributable to the room. Actual use is 6 business hours to 2 household hours, so 6/8: £450.
| Part of the claim | Flat-rate route | Actual-cost route |
|---|---|---|
| Fixed costs — £15,000 × 1/5 room × 8/10 time | £2,400 | £2,400 |
| Household running costs — £3,000 × 1/5 room × 6/8 time | £312 flat rate | £450 |
| Phone and broadband | Claimed separately | Claimed separately |
| Home-working deduction | £2,712 | £2,850 |
Two things follow, and they are not what most articles suggest.
The flat-rate decision is worth £138 to her. Real, but small. If she values not tracking her energy bills, taking the flat rate is a perfectly reasonable trade.
The £2,400 of fixed costs is available either way — and that is the number a creator claiming only £312 has missed. The expensive mistake is not choosing the flat rate. It is treating £312 as the whole claim.
There is also a refinement available to her. Her studio lighting and editing machine are precisely the power-consuming items HMRC tells inspectors to consider, so an electricity apportionment based on usage rather than floor area could be higher than 1/5 — which would widen the gap between the two routes. That has to be reasonable and explicable, but it is the manual's own logic.
Making the claim stand up
Record the basis clearly. "One room of five broadly comparable rooms, set aside solely for work 9am–5pm, household use around two hours each evening" is a defensible position stated in a sentence. Apply it consistently to that year, and revisit it when your costs, workspace or working pattern changes. What is difficult to defend is changing the calculation arbitrarily without a factual reason.
Keep the bills. Fixed-cost claims need the rent statements, council tax, insurance documents and mortgage interest certificates behind the figure — including where you use the flat rate for running costs.
Log your hours if you use the flat rate. Qualifying hours on core business activities, month by month. It is the key evidence supporting the flat-rate calculation, and failing to keep it could jeopardise the claim if HMRC asks how the monthly threshold was met.
It is worth reading this alongside the full expenses guide, which covers the wider "wholly and exclusively" test and how apportionment works for other shared costs.
Where CreatorBooks fits
CreatorBooks is a UK accountancy firm built for creators. Home working is one of the areas we look at most closely, because a creator's home is usually a studio, an office and a warehouse at once — and the £312 flat rate is rarely the whole story.
Not sure where you stand? The free Creator Tax Check takes about a minute and flags the areas worth looking at.
Related questions
Can I claim council tax and rent as well as the £312 flat rate?
HMRC's guidance says using the flat rate for household running costs does not prohibit a separate deduction for fixed costs such as council tax, insurance and mortgage interest, where an identifiable proportion can be attributed to business use. Rent is classified as a fixed cost in the same guidance. You need to be able to identify and evidence the proportion.
What counts towards the 25 hours a month?
Hours spent wholly and exclusively on core business activities in the home — providing goods or services, maintaining business records, and marketing and obtaining new business. Not simply time spent at home.
Will claiming a home office cost me Capital Gains Tax when I sell?
Not by itself. The restriction applies only where part of the home is used exclusively for business, and HMRC's guidance says a room used partly for business and partly residentially qualifies in full for relief. It also treats the income tax apportionment as a poor guide to the CGT position. A permanently dedicated studio with no residential function is a different case.
Does keeping personal things in the room protect my relief?
No. HMRC's guidance gives the example of a doctor keeping private possessions in a room used as a surgery and says the room is still exclusively in business use. What matters is regular residential use of the room, not what is stored in it.
Can I claim broadband if I use the flat rate?
Yes. Telephone and broadband are not household expenses and sit outside both routes. Where private use is not significant, the full cost may be claimable rather than a proportion.
Can I claim my mortgage?
The interest element only, apportioned to business use; capital repayments are never allowable. If you are on the cash basis, relief for interest on cash borrowing is generally limited to £500 for the period.
This article provides general information only and is not tax advice. Tax treatment depends on individual circumstances, and rules and thresholds can change.