Do I Need to Declare Rental Income to HMRC?

Last updated 24 June 2026 · 9 min read · By the LandlordTaxAi Editorial Team

The short answer

If your gross rental income for the year is over £1,000, you must declare it to HMRC. Under £1,000 it is covered by the property allowance and you usually need not report it. If you must declare and are not already in Self Assessment, register by 5 October after the tax year ends. Not declaring is tax evasion — and HMRC now gets your data from agents, banks and the Land Registry.

It is one of the most-searched questions in UK property — and the stakes are real, because getting it wrong can mean penalties going back years. The rules are actually simple once you separate the gross income test from the question of whether any tax is due. Here is the clear version, including the deadline most accidental landlords miss. For the mechanics of the return itself, see our landlord tax return guide.

The thresholds at a glance

Gross property income	What you must do
£1,000 or less	Covered by the property allowance — usually nothing to report
Over £1,000	Declare it — register for Self Assessment and file an SA105
Over £50,000	Also brought into Making Tax Digital from April 2026 (quarterly updates)

The tests use gross income — total rent received, before expenses. A property making a loss can still be over the £1,000 threshold and therefore reportable.

The deadline that catches accidental landlords

If you need to declare and are not already registered, you must tell HMRC by 5 October following the end of the tax year in which you started receiving the income. Inherited a property, moved in with a partner and let your old home, or took in a lodger above the threshold? The clock is already running. Miss it and a failure-to-notify penalty can be added on top of the tax.

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Estimate the tax on your rental income for 2026/27

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Result

Taxable profit (rent − expenses): £11,200
Income Tax at 40%: £4,480
Less mortgage interest credit (20%): − £1,000
Tax due on this property: £3,480
Income after tax: £7,720

Estimate based on verified 2026/27 UK rates. Informational only — not personal tax advice.

New to declaring rental income?

LandlordTaxAi turns your bank statements into a clean, HMRC-ready record of rents and expenses — so your first return is right, and you are ready for Making Tax Digital.

See how it works

How to declare, step by step

1
Add up your gross rental income for the tax year
Take the total rent and other property income you received between 6 April and 5 April — before deducting any expenses. This gross figure is what the thresholds are measured against.
2
Check it against the £1,000 property allowance
If your gross property income for the year is £1,000 or less, it is covered by the property allowance and you usually do not need to tell HMRC. Above £1,000 you must declare it.
3
Register for Self Assessment by 5 October
If you need to declare and are not already in Self Assessment, register by 5 October following the end of the tax year in which you started receiving the income. Miss this and you risk a failure-to-notify penalty.
4
Report the income and claim your expenses
Complete the SA105 UK property pages with your rents, allowable expenses and mortgage interest (in the Section 24 box), or use the £1,000 allowance instead of expenses if that gives a better result.
5
Pay your tax — and get ready for MTD
Pay any tax due by 31 January. If your qualifying income is over £50,000 you will also be brought into Making Tax Digital for Income Tax from April 2026, with quarterly digital updates replacing the once-a-year return.

Behind on declaring? Don’t panic — disclose

If you have rental income you should have declared in earlier years, coming forward voluntarily through HMRC’s Let Property Campaign almost always means lower penalties than waiting for HMRC to find you — and they increasingly do, using data from agents, deposit schemes and banks. We cover the process in our Let Property Campaign disclosure guide.

Frequently asked questions

Do I have to declare rental income under £1,000?

Usually not. The £1,000 property allowance means that if your gross property income for the tax year is £1,000 or less, it is automatically covered and you do not need to report it to HMRC. The moment your gross rents exceed £1,000, you must declare — and you can still choose to deduct the £1,000 allowance instead of your actual expenses if that produces a lower taxable profit.

When do I need to tell HMRC about rental income?

If your property income is more than £1,000, you must notify HMRC and register for Self Assessment by 5 October following the end of the tax year in which the income arose. For example, income first received in the 2026/27 tax year must be registered by 5 October 2027. Telling HMRC late can lead to a failure-to-notify penalty on top of the tax.

What happens if I don't declare rental income?

Undeclared rental income is tax evasion, even if accidental. HMRC receives data from letting agents, deposit schemes, the Land Registry and banks, so unreported lettings are increasingly easy to spot. If you have rents you should have declared, the Let Property Campaign lets you come forward voluntarily, usually with lower penalties than if HMRC finds you first. The longer it is left, the further back HMRC can go — up to 20 years in cases of deliberate behaviour.

Is rental income taxed even if I make a loss?

You only pay tax on a profit, but you still have to declare the income if it is over £1,000 — the loss is established through your return. Rental losses can be carried forward and set against future profits from the same property business, so declaring a loss year is worthwhile even though no tax is due.

Do I declare rental income if I let a room in my own home?

The Rent a Room scheme lets you earn up to £7,500 a year tax-free from letting furnished accommodation in your only or main home (£3,750 each if shared). Below that threshold it is automatic and you need not declare it; above it, you report it and can choose to pay tax only on the excess. The £7,500 Rent a Room threshold is separate from the £1,000 property allowance.

How does Making Tax Digital change this from April 2026?

From 6 April 2026, landlords with qualifying income over £50,000 must keep digital records and send HMRC quarterly updates through compatible software, with the threshold dropping to £30,000 and later £20,000. It does not change whether you must declare — it changes how. If your rents are over £50,000 you move from one annual return to four quarterly updates plus a final declaration.

Written and reviewed by the LandlordTaxAi Editorial Team. Our guides are reviewed against current HMRC guidance and updated when the rules change. Operated by LandlordTaxAi, United Kingdom. Follow us on LinkedIn.

Last reviewed: 24 June 2026 · Based on HMRC’s “Renting out your property” and “Tax-free allowances on property and trading income” guidance: the £1,000 property allowance, the 5 October Self Assessment registration deadline, the £7,500 Rent a Room scheme, the Let Property Campaign and the April 2026 Making Tax Digital thresholds. This article is informational only and does not constitute tax advice. Check the latest details on GOV.UK or with a qualified accountant.