Rent-a-room scheme: when it applies and when it doesn’t

The rent-a-room scheme is set out in ITTOIA 2005, ss784–802 and the supporting HMRC guidance in PIM4001 onwards. The headline is familiar: if a host lets furnished accommodation in their own home and gross receipts are no more than £7,500 a year (£3,750 each where the income is shared with another individual), the income is automatically exempt and no return entry is required.

The detail is where firms tend to get caught. Whether a let qualifies at all, what “gross receipts” means in practice, the difference between the two methods available above the threshold, and the knock-on effect on principal private residence relief if the host moves out — each of these has its own catches. This guide walks through them in order.

The qualifying conditions (PIM4020)

PIM4020 sets out four conditions, all of which must be met for the scheme to apply. None of them is optional.

1. The accommodation must be in the host’s main residence

The property must be the individual’s only or main residence for at least some part of the relevant tax year. It need not be owned: a tenant subletting a room with the landlord’s permission can use the scheme, as can an owner-occupier. Second homes, buy-to-lets, and holiday lets do not qualify — they are not the host’s residence.

If the host moves out part-way through the year and the property ceases to be the main residence, the scheme stops applying from that point. Receipts up to the move-out date can fall inside rent-a-room; receipts after it cannot.

2. The letting must be for residential use

The lodger must occupy the room as living accommodation. The scheme does not cover:

• Office or business use. Renting a room to a consultant as a home office, or to a small business to store stock, falls outside the scheme — even if the room is inside your main residence.
• Storage. Letting garage or loft space for storing furniture, vehicles, or goods is not residential use.
• Whole-property lets where the host is absent. Renting out the entire home while you live elsewhere for a stretch — common with relocation lets or extended Airbnb arrangements — fails the main-residence test for that period.

Short-stay residential lets, including standard Airbnb bookings where guests sleep in a spare room and the host is still living there, are within the scheme provided the other conditions are met. The distinction is whether the host is actually in residence and whether the use is residential.

3. The room must be furnished

The scheme requires the let to be of furnished accommodation. An empty room let to a lodger who brings their own bed and wardrobe will not qualify; the room needs to be furnished by the host. This rarely catches anyone in practice but it is worth knowing.

4. The income must be from letting in the residence

Receipts that don’t arise from the let itself — for example, separately invoiced cleaning of areas the lodger doesn’t use, or unrelated services — are outside the scheme. Income from meals provided as part of the lodging package, charges for utilities, and laundry done for the lodger all count as part of rent-a-room receipts and need to be included in the £7,500 calculation.

The £7,500 threshold, and the £3,750 halving rule

The exemption applies to gross receipts, not profit. That means rent, plus any extras the host charges the lodger for — utilities, meals, laundry, broadband contribution. You don’t deduct expenses before testing the threshold.

Where the income is shared with another individual — typically spouses or civil partners who jointly own the home, but it also covers other co-hosts — each person’s threshold is halved to £3,750 regardless of the share they actually receive. This is set out in PIM4040 (shared sums). Two examples make the rule concrete:

• A couple jointly let a room and the host receipts total £6,000 split 50:50. Each receives £3,000. Each has a £3,750 threshold and is therefore inside the exemption.
• Same couple, but they let two rooms and receipts total £8,000 split 50:50. Each receives £4,000 — which exceeds the individual £3,750 threshold. Both are now above the limit and must choose a method (see below). The fact that they would have been inside the £7,500 combined limit if a single host had received the lot does not help them.

The default-in / opt-out mechanic

The scheme is unusual in that it applies automatically. The host does not need to claim it.

If gross receipts are at or below the threshold

If gross rent-a-room receipts are £7,500 or less (or £3,750 if halved), the income is exempt and no entry is required on the Self Assessment return. The host doesn’t tick a box or make an election. It just drops out. PIM4001 confirms this default-in position.

If the host has no other reason to file a return, they need not register for Self Assessment for the rent-a-room income alone. Where they already file — for example for other property income, self-employment, or dividends — the rent-a-room receipts are simply not reported.

If gross receipts exceed the threshold

Once gross receipts cross £7,500 (or £3,750 where halved), the host has a choice of two methods (PIM4030):

• Method A — default treatment. Stay in the scheme. The taxable amount is gross receipts minus the £7,500 threshold. Allowable expenses cannot be deducted. There is no need to make an election; this is what happens if the host does nothing.
• Method B — opt out. Compute the profit on the ordinary basis: gross receipts less allowable expenses (and less the £1,000 property allowance, where it gives a better answer). To opt out, the host must make an election under ITTOIA 2005, s799 within the time limit — by the first anniversary of the 31 January following the end of the tax year (so for 2025/26, by 31 January 2028). The election applies to that tax year only; the host can choose afresh each year.

The choice is purely arithmetic: pick whichever produces the lower taxable profit. As a rule of thumb, Method A wins when allowable expenses are modest relative to the £7,500 floor; Method B wins when costs run high — for example a host who is providing meals, paying a portion of utilities, and has a hefty repairs bill in the year.

Worked example — Airbnb host with £12,000 of gross receipts

A solo host lets a spare room in her main residence on Airbnb throughout 2025/26. She is in residence for the whole year, the let is residential, and the room is furnished. Her receipts and costs:

• Gross receipts (rent plus cleaning fees passed through): £12,000
• Allowable expenses (proportion of utilities, replacement of bedding, host platform fees): £2,800

Her gross receipts exceed £7,500 so the exemption does not apply on its own. She compares both methods:

• Method A (default — stay in scheme): taxable amount = £12,000 − £7,500 = £4,500. No expense deduction. No election needed.
• Method B (opt out): taxable profit = £12,000 − £2,800 = £9,200. An election under s799 would be required.

Method A produces a lower taxable figure (£4,500 versus £9,200), so she stays in the scheme by default and reports £4,500 as taxable rent-a-room income on her return. Had her allowable expenses been closer to £8,000 — say a year where the boiler needed replacing and she could establish the repair as revenue rather than capital — Method B would have given a lower figure and the election would be worth making.

Interaction with principal private residence relief

Letting a single room to a lodger who shares the host’s living space does not generally restrict principal private residence (PPR) relief on a future sale of the home: HMRC’s long-standing concession (and now codified practice) treats a single-lodger arrangement, where the lodger lives as a member of the family sharing meals and living space, as not generating a separate let part.

The position shifts when the let becomes more substantial — letting a self-contained part of the property, hosting multiple unrelated lodgers in separate areas, or letting the whole property during periods when the host is absent. In those cases, a portion of any future gain may fall outside PPR and into the scope of lettings relief (now very narrow) and ordinary CGT. The rent-a-room income exemption and the PPR position are separate questions and need to be considered independently.

The cleanest case is the resident host with one lodger in a spare room: rent-a-room exempt under £7,500, full PPR on sale. The messy cases involve hosts who move out, hosts who self-contain part of the property, and hosts running the arrangement as a small lodging business. Advise accordingly.

What rent-a-room doesn’t do

Three quick reminders of what the scheme is not:

• It is not the same as the £1,000 property allowance. Hosts above the rent-a-room threshold choosing Method B can still claim the property allowance against gross receipts if it beats actual expenses, but they cannot stack rent-a-room and the property allowance on the same income.
• It does not cover furnished holiday lettings of properties that are not the host’s main residence. The FHL regime itself was abolished from April 2025; that does not bring whole-property short-term lets into the rent-a-room scheme.
• It does not switch off the £7,500 limit being an annual figure. There is no carry-forward of unused threshold from a low-receipt year into a high-receipt year.