The Rent a Room Scheme lets owner-occupiers earn up to £7,500 a year tax free from letting a furnished room in their main home. The figure has been frozen since 6 April 2016 and is unchanged for 2026/27. It is one of the few residential property tax breaks that has not been narrowed in the post Section 24 era, which is why it has become more relevant as standard buy-to-let returns have tightened.
This guide focuses on the rules that the average lodger explainer gets wrong: the £3,750 joint-owner split, the one-year opt-out deadline, why you cannot claim a loss under the scheme, and how lodger income interacts with an existing buy-to-let portfolio under Section 24 and Making Tax Digital for Income Tax (MTD for ITSA), which went live on 6 April 2026 for landlords with qualifying income above £50,000.
The 2026/27 allowance at a glance
The Rent a Room allowance for 2026/27 is £7,500 of gross receipts, not net profit. Gross receipts include rent plus any service charges paid by the lodger (cleaning, meals, laundry, utilities recharged). They do not include refundable deposits held against damage.
| Item | 2026/27 | Notes |
|---|---|---|
| Standard allowance (sole receipt) | £7,500 | Frozen since 6 April 2016, not index-linked |
| Reduced allowance (joint receipt) | £3,750 each | Applies whenever more than one person receives lodger income from the same property, including spouses |
| Property allowance (separate) | £1,000 | Cannot be used on the same income as Rent a Room |
| Opt-out election deadline | 31 January 2029 | For the 2026/27 tax year (one year after the normal Self Assessment filing date) |
| Reporting required under threshold? | No | Provided you have no other reason to file Self Assessment |
The legal basis is in Part 7, Chapter 1 of the Income Tax (Trading and Other Income) Act 2005 (ITTOIA 2005), sections 784 to 802. HMRC publishes the operational detail in helpsheet HS223 (Rent a Room Scheme), which is the authoritative reference and is updated each tax year.
Who qualifies (and who does not)
To use the Rent a Room Scheme three conditions must all be met:
- The accommodation is in your only or main residence during at least part of the tax year. Holiday homes, second homes, and properties you have moved out of do not qualify.
- The accommodation is furnished. Bare-room lets do not qualify. The standard is functional furnishing (bed, storage, seating), not luxury level.
- The lodger shares living space with you (or with another permitted occupier such as your spouse). The scheme is designed for shared occupation, not for letting a separate, self-contained unit.
Common situations that do qualify include traditional lodgers, foreign exchange and language students living with a host family, paying guests in your home (B&B style), and short-term Airbnb-style lets of a room while you continue to live in the property.
Common situations that do not qualify:
- Letting an entire self-contained annexe, granny flat, or separate apartment, even if it is attached to your main home.
- Letting your whole house while you live abroad or in a different property.
- Letting to a company rather than an individual.
- Running the let from a property that is not your main residence (for example, a buy-to-let you let room by room).
- B&B or guest house activity carried on in a separate building.
The £3,750 joint-owner rule (the rule most guides get wrong)
Where more than one person receives income from letting in the same property, the £7,500 allowance is halved to £3,750 each. This applies even where the property is owned jointly by spouses or civil partners. There is no married-couple top-up, and the combined household tax-free amount stays at £7,500, not £15,000.
Many older lodger guides (and several still-live competitor pages) state that joint owners each get £7,500. That is not correct. HMRC's HS223 is explicit, and the legislation in ITTOIA 2005 s.789 sets out the apportionment.
Worked example: joint owners with one lodger
Anna and Ben own their Manchester home jointly. They take in a lodger who pays £700 a month including bills, so £8,400 over the tax year. The receipts are shared 50/50.
- Anna's share of receipts: £4,200. Anna's allowance: £3,750. Taxable: £450.
- Ben's share of receipts: £4,200. Ben's allowance: £3,750. Taxable: £450.
- Combined taxable: £900, each taxed at their marginal rate.
If Anna had taken the lodger in her sole name (say Ben was abroad for the year and she was the sole UK resident receiving the income), she would have had the full £7,500 against her £8,400 receipts, leaving £900 taxable in her hands alone. The total tax bill across the household is the same; the difference is whose personal allowance and tax band the £900 falls into.
Practical planning point
For couples where one spouse is a non-taxpayer or basic-rate taxpayer and the other is a higher-rate taxpayer, the joint-owner split can actually be useful: the £450 in the higher-rate spouse's hands is taxed at 40%, but the matching £450 in the basic-rate spouse's hands is taxed at 20%. If the property is held jointly by default, the 50/50 split is the standard HMRC treatment unless a Form 17 declaration is in place reflecting unequal beneficial ownership.
How much can you earn tax free, and how the maths works
If your gross receipts for the year are £7,500 or less (£3,750 or less per joint owner), the income is automatically exempt. No expenses, no tax, no entries on the Self Assessment return unless you file for other reasons.
If receipts exceed the threshold you choose between two methods.
Method A: use the Rent a Room allowance
Taxable income = gross receipts minus £7,500 (or £3,750 for joint receipt). No expenses are deductible.
Example: a sole occupier landlord in Bristol takes in two lodgers paying £450 each per month, total £10,800 a year. Method A taxable amount: £10,800 − £7,500 = £3,300.
Method B: opt out and use normal property rules
You declare the let on the property pages of Self Assessment, deduct allowable expenses apportioned to the let part of the home, and pay tax on the net profit. The Section 24 finance cost restriction applies in the normal way if there is a mortgage and you allocate part of the interest to the let.
Using the same Bristol example: receipts £10,800, allowable expenses (apportioned utilities, council tax, repairs, cleaning, insurance, replacement furnishings) £3,400. Method B taxable amount: £7,400.
Method A is better here by £4,100 of taxable income. As a rule of thumb, Method A wins whenever apportioned expenses are less than £7,500; Method B wins when expenses are higher (typically only when the let portion of the home has had significant maintenance spending or where the mortgage interest, even at the 20% credit, materially tilts the calculation).
The one-year opt-out deadline
You do not have to use the Rent a Room Scheme. You can elect out and use normal property income rules instead. The deadline is one year after 31 January following the end of the tax year.
| Tax year | Self Assessment filing deadline | Opt-out deadline |
|---|---|---|
| 2025/26 | 31 January 2027 | 31 January 2028 |
| 2026/27 | 31 January 2028 | 31 January 2029 |
| 2027/28 | 31 January 2029 | 31 January 2030 |
Missing the deadline locks you into the default treatment for that year (which is the scheme if receipts are above the limit, or normal rules if they are below it). You opt out by writing to HMRC or ticking the relevant box on the property pages of your return. The election only covers one tax year; you can change your mind year on year.
Losses cannot be claimed under the scheme
Under Method A (the scheme), the calculation simply cannot produce a loss: it is gross receipts minus the allowance, capped at zero. So if your apportioned expenses on the let portion of the home are very high in a particular year (a one-off repair to the let bedroom's plumbing, for example) and they exceed gross receipts, you cannot claim that excess as a loss against other property income, against your trading income, or carry it forward.
The only way to access loss relief is to opt out for that year (within the one-year window) and use normal property rules. Any loss can then be carried forward against future UK property profits under PIM4210.
Rent a Room and a buy-to-let portfolio
For landlords with an existing portfolio, Rent a Room sits alongside (not inside) the property income calculation. The two streams are taxed differently, reported differently, and tested differently for thresholds.
Section 24 interaction
Section 24 of the Finance (No.2) Act 2015 restricts mortgage interest relief on residential lettings to a basic-rate (20%) tax credit. It applies to standard residential property income reported on the property pages. It does not apply to lodger income taxed under the Rent a Room Scheme, because that income is not in the property pages at all when the scheme is used. This is a meaningful tax efficiency for higher-rate landlords with a single spare room in their main home, especially where a buy-to-let elsewhere is already maxed out under the Section 24 restriction. For the wider mechanics of Section 24 see our Section 24 complete guide.
MTD for Income Tax interaction
MTD for ITSA went live on 6 April 2026 for sole-trader landlords with qualifying income (gross trading plus gross property receipts) above £50,000. The threshold drops to £30,000 from 6 April 2027 and to £20,000 from 6 April 2028. The official sign-up checker is at gov.uk/guidance/check-when-to-sign-up-for-making-tax-digital-for-income-tax.
If you stay within the Rent a Room limit and use the scheme, that £7,500 is not property income for MTD purposes and does not count towards the qualifying income threshold. If you opt out, the gross receipts do count. So a landlord with a buy-to-let portfolio earning £45,000 in gross rents plus £6,000 in lodger receipts has two very different MTD outcomes depending on the election:
- Stay in the scheme: qualifying income £45,000. Below the £50,000 threshold. No MTD obligation for 2026/27.
- Opt out: qualifying income £51,000. Above the threshold. MTD-compatible quarterly updates required from 6 April 2026.
The election can be the difference between needing MTD software and not.
Property allowance interaction
The £1,000 property allowance cannot be claimed on the same income as Rent a Room relief. If your only property income is from a lodger, choose Rent a Room (it is 7.5 times higher). The two allowances can coexist where you have genuinely separate property income streams (e.g. £400 of garage rent on a separate property), in which case the £1,000 allowance covers the unrelated stream and Rent a Room covers the lodger.
Capital Gains Tax: Principal Private Residence Relief
Using part of your main residence for lodgers can in principle affect Principal Private Residence Relief (PPR) when you eventually sell. In practice, HMRC accepts that a lodger sharing living areas with the homeowner does not amount to exclusive business use, so PPR continues to cover the full gain on sale. The supporting HMRC guidance is in the Capital Gains Manual at CG64702.
The risk arises when:
- You convert part of the home into a self-contained unit (separate kitchen, bathroom, lockable entrance) for long-term let. The let part of the building can then fall outside PPR for the period of business use.
- The lodger has exclusive use of clearly defined rooms (more than a single bedroom) over multiple years.
- You move out entirely and let the whole property. PPR then runs only for the period you actually lived there, with a final 9 months of deemed occupation tacked on under the standard rules.
Where any of those apply, the gain is apportioned on sale, and the let portion may need to be reported and paid within 60 days of completion under the UK Property CGT service.
Mortgage, insurance and licensing
Three practical checks before a lodger moves in:
- Residential mortgage terms. Most high-street residential mortgages allow a single lodger subject to notifying the lender. A second lodger, or letting a self-contained part of the property, can push the arrangement into "consent to let" territory or, with some lenders, breach the mortgage entirely. Read the offer document or ask the lender in writing.
- Home insurance. Most buildings and contents policies require notification when a lodger lives in the property, and some insurers exclude lodger-related risks (theft by lodger, accidental damage by lodger) unless an endorsement is added. Premiums typically rise modestly rather than significantly.
- HMO licensing. A single lodger sharing facilities with the homeowner does not normally create a House in Multiple Occupation. Two unrelated lodgers in a property of three storeys or more, or in an additionally licensed area, can do. Check the local authority's additional and selective licensing scheme; central London, Manchester, Liverpool, Birmingham, and Leeds all have wide additional licensing zones.
Common mistakes that trigger an HMRC enquiry
- Counting net rather than gross receipts. The £7,500 limit is on gross receipts including service charges, not on profit. Including a £100 monthly utilities recharge can push a £7,200 rent over the limit unnoticed.
- Claiming £7,500 each as joint owners. As above, this is wrong. The allowance is halved to £3,750 each.
- Using the scheme on a buy-to-let. Letting a room in a property that is not your main home does not qualify, even if you sometimes stay there.
- Forgetting the opt-out deadline. If you wanted to use normal rules for 2025/26 (to claim a loss or claim significant expenses), the election needed to be in by 31 January 2028. After that the default treatment locks in.
- Treating Airbnb income in a separate flat as Rent a Room. Short lets in a property that is not your only or main residence do not qualify. They go on the property pages, and (since the furnished holiday lettings regime was abolished on 6 April 2025) they are now taxed as ordinary residential rental income.
When professional advice pays for itself
The Rent a Room rules are short on the face of it but interact with several larger frameworks: Section 24, MTD for ITSA, PPR on sale, the property allowance, and (for joint owners) Form 17 income-split declarations. The cases where it makes sense to involve a property tax specialist rather than file the return yourself are:
- You hold a portfolio of one or more buy-to-lets and the lodger income could tip your qualifying income across an MTD threshold.
- You and your spouse own the home jointly and want to allocate the lodger income to the lower earner via Form 17.
- You are converting part of the home into a self-contained unit and the PPR position needs documenting before sale.
- You are running a B&B or extended Airbnb operation from your main home and the line between Rent a Room, trading income, and Class 2 NIC is unclear.
- You opted out in a previous year, made a loss, and want to know whether the carried-forward loss is still usable now you are back in the scheme.
Outside those cases, Rent a Room is one of the simplest UK tax breaks to administer and one of the most generous on a per-room basis. For most homeowners with a single lodger paying market rent in a major UK city, the answer to "is this taxable?" is no, and the answer to "do I need to file?" is also no.