The Rent a Room Scheme UK is one of the most underused tax reliefs available to homeowners and tenants. It allows you to earn up to £7,500 per year tax-free by renting a furnished room in your home. For a homeowner with a spare room in a city, that can mean covering a significant portion of the mortgage with no tax liability at all. Here is everything you need to know about qualifying, the two tax options above the threshold, and the practical obligations you take on when you take in a lodger.
What Is the Rent a Room Scheme?
Introduced in 1992 and made permanent in 1997, the Rent a Room Scheme is a government incentive to increase the supply of private rented rooms in occupied homes. The current threshold — £7,500 per year (2024/25 tax year) — has been frozen at this level since April 2016.
The relief is automatic: if your gross receipts from letting a furnished room are at or below £7,500, you do not need to declare the income on a Self Assessment tax return (unless you already file one for other reasons). If you are above the threshold, you must register for Self Assessment and choose between two options.
Who Qualifies?
- Owner-occupiers who let a furnished room in their main home
- Tenants who sublet a furnished room, provided their own tenancy agreement permits subletting (always get your landlord's written permission first)
- The room must be furnished
- The property must be your main home — holiday lets or buy-to-let properties do not qualify
- Joint ownership: the £7,500 threshold is split, so each owner can only claim £3,750
The scheme does not apply to:
- Renting to a business rather than an individual
- Letting an entire flat within a larger property you own
- Rooms in properties not being used as your main residence
Option A vs Option B: Above £7,500
If your gross rental receipts exceed £7,500, you must opt into the scheme (or out of it) via your Self Assessment return.
Option A — Rent a Room Relief: You pay income tax on the amount by which your receipts exceed £7,500. Your expenses are irrelevant under this option.
Option B — Standard Rental Profits: You calculate your rental profit in the normal way (receipts minus allowable expenses including wear and tear, insurance, direct costs) and pay tax on the profit. This is better if your allowable expenses are high.
Worked Example: £800/Month Lodger (£9,600/Year)
Assume the landlord is a basic-rate (20%) taxpayer. They charge £800/month, which is £9,600/year gross. They have allowable expenses of £1,800/year (share of utilities, cleaning, insurance uplift).
| Option A | Option B | |
|---|---|---|
| Gross receipts | £9,600 | £9,600 |
| Deduction | £7,500 (threshold) | £1,800 (actual expenses) |
| Taxable amount | £2,100 | £7,800 |
| Tax at 20% | £420 | £1,560 |
| Tax at 40% (higher rate) | £840 | £3,120 |
At basic rate, Option A saves £1,140 versus Option B. Option B only wins when your actual allowable expenses exceed £7,500 — which for a single furnished room in a shared home is extremely unlikely.
More Income Scenarios
| Monthly Rent | Annual Gross | Option A Tax (20%) | Option B Tax (20%, £1,800 expenses) |
|---|---|---|---|
| £500 | £6,000 | £0 (below threshold) | £0 (below threshold) |
| £625 | £7,500 | £0 (at threshold) | £0 (at threshold) |
| £700 | £8,400 | £180 | £1,320 |
| £800 | £9,600 | £420 | £1,560 |
| £1,000 | £12,000 | £900 | £2,040 |
| £1,200 | £14,400 | £1,380 | £2,520 |
Option A is almost always the better choice for single-room lettings in a shared home.
Your Lodger's Legal Rights
This is the most important practical point for anyone considering the scheme. A lodger is an excluded occupier, not an assured shorthold tenant (AST). This means:
- The Protection from Eviction Act 1977 does not apply in the same way — you can evict a lodger by giving reasonable notice (usually the rent period, e.g. one month) without a court order, provided you live in the property
- The lodger has no right to challenge rent increases
- Deposit protection schemes (TDS, DPS, MyDeposits) do not legally apply — though using one is good practice
- The lodger cannot sublet without your permission
HMO licensing caveat: If you have 5 or more people from 2 or more households living in your property (including yourself), it becomes a House in Multiple Occupation (HMO) and may require a mandatory HMO licence from your local council. See our complete guide to HMO licensing for the three licence tiers, room size standards, and penalties. Check before you take in a third or fourth lodger.
Mortgage Lender Consent
Your mortgage terms may require you to notify your lender before taking in a lodger. Most residential lenders permit lodgers under the Rent a Room Scheme, but some buy-to-let mortgages explicitly prohibit owner-occupation and would be breached if you are also living there. Check your mortgage offer document's standard conditions. For more on buy-to-let obligations, see our guide to adding value to a buy-to-let property.
If you do not notify your lender when required, you risk a technical breach of contract — although in practice lenders rarely take action for undisclosed lodgers. The prudent approach is a quick call or letter to confirm.
Insurance Obligations
Your home insurance provider must be told you have a lodger. Failure to disclose can render your buildings and contents policy void in the event of a claim. Most standard home insurers will cover a single lodger for a modest premium uplift (typically £25–£75/year). Some specialist providers offer dedicated lodger insurance policies.
If your lodger has their own contents, they will need their own renters insurance — your policy will not cover their belongings.
Conclusion
The Rent a Room Scheme UK is a genuinely straightforward way to generate tax-efficient income from an underused asset in your own home. For most landlords taking a single lodger, Option A (paying tax only on the amount above £7,500) delivers the best outcome, and for receipts at or below the threshold there is nothing to report at all. Notify your lender, tell your insurer, give your lodger a simple written lodger agreement, and the scheme runs itself.
For a fuller picture of landlord obligations and income strategies, see our guide to how to deal with difficult landlord-tenant issues and the HMO licensing guide if you are considering taking in multiple lodgers.