Question 1

What is the Rent a Room allowance for 2025/26?

Accepted Answer

The Rent a Room threshold is £7,500 per year (£3,750 each if two people share the rental income from the same property). Income below this is completely tax-free and does not need to be declared.

Question 2

Do I need to declare rent a room income on a tax return?

Accepted Answer

If your income is below the £7,500 threshold, you don't need to declare it — the exemption is automatic. If you exceed the threshold and want to use the scheme, you must complete a Self Assessment tax return and elect for Rent a Room relief.

Question 3

Can I choose between Rent a Room relief and claiming actual expenses?

Accepted Answer

Yes — each tax year you can choose whichever method gives you a lower tax bill. If your allowable expenses (mortgage interest is not deductible, but maintenance, utilities proportioned to the lodger, etc.) exceed £7,500, the standard method may be better.

Question 4

Does Rent a Room apply to Airbnb income?

Accepted Answer

Only if you are living in the property at the same time as your guests. If you rent out your home while you're away, it does not qualify. Short-let platforms like Airbnb can qualify if you're a resident host.

Question 5

Do I need my mortgage lender's permission to take in a lodger?

Accepted Answer

Most residential mortgage lenders allow you to take in a lodger without explicit permission, but some require you to notify them. Check your mortgage terms and conditions. If your property is leasehold, your lease may also require the freeholder's permission. Sublet or short-term letting of the entire property (as opposed to a single room while you live there) is a different matter and almost always needs the lender's consent or a separate buy-to-let mortgage.

Question 6

What expenses can I claim instead of Rent a Room relief?

Accepted Answer

If you choose the standard method instead of Rent a Room relief, you can deduct a proportion of your actual costs based on the floor area or number of rooms used by the lodger: council tax, utility bills, contents insurance, repairs and maintenance, cleaning. Note that mortgage interest is not deductible on a standard residential property used partly for letting  -  this is the main limitation of the standard method compared to buy-to-let landlords. If your actual deductible expenses are less than £7,500, Rent a Room relief is almost certainly better.

Question 7

Does lodger income affect Universal Credit?

Accepted Answer

Rental income from a lodger counts as income for Universal Credit purposes if it exceeds the £7,500 Rent a Room threshold. Below £7,500 per year, the income is ignored for UC (it is classed as exempt lodger income). Above £7,500, the excess is treated as self-employed income under UC rules and reduces your UC award accordingly. DWP guidance is to report lodger income to your work coach via your online journal.

Rent a Room Calculator UK 2026/27 — Tax-Free Relief