Let Property Campaign
Quick answer
An HMRC disclosure facility that lets UK residential landlords come forward voluntarily about undeclared rental income from earlier years. In return for disclosing before HMRC opens an enquiry, landlords self-assess a reduced penalty: as low as 0% where there is a reasonable excuse, typically around 10–20% for an unprompted careless disclosure, rising toward 100% of the tax for deliberate concealment that HMRC discovers first. After registering an intention to disclose, the landlord has 90 days to calculate and pay the tax, interest and penalty.
At a glance
- Run by
- HMRC
- For
- Undeclared rental income
- Pay within
- 90 days of registering
- Back years
- 6 (careless) / 20 (deliberate)
Full guide
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Open full guideWhy Let Property Campaign matters for landlords
HMRC now cross-references Land Registry, deposit schemes, letting-agent data and the tenancy-deposit and PRS databases, so undeclared rent is increasingly easy to spot. Coming forward unprompted through the Let Property Campaign is far cheaper than waiting for a "nudge" letter: an unprompted careless disclosure can settle at roughly 10–20% of the tax, whereas a deliberate failure HMRC uncovers itself can cost up to 100% on top of the tax and interest — and can reach back 20 years.
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Official sources
LetCompliance editorial reviews this entry every quarter against the sources above. Always confirm specific duties with a qualified solicitor or your local council.
Related terms
BTL (Buy-to-Let)
A mortgage product and business model where a property is purchased specifically to rent out. Buy-to-let landlords are subject to Section 24 of the Finance Act 2015, which replaced mortgage interest relief with a 20% tax credit. Stamp duty is higher on a second property.
Capital Allowances
Tax relief for capital spending on qualifying "plant and machinery". For a standard residential letting they are generally NOT available — furniture and appliances are covered instead by Replacement of Domestic Items Relief. Capital allowances mainly apply to equipment in the communal areas of some HMOs and to commercial property; the furnished holiday let regime that allowed them was abolished from April 2025.
Capital Gains Tax (CGT)
Tax on the profit from selling a rental property. From April 2024 the CGT annual exempt amount was reduced to £3,000 and residential property gains are taxed at 18% (basic rate) or 24% (higher rate). A CGT return must be filed and tax paid within 60 days of completion.
Furnished Holiday Let (FHL)
A short-let property meeting the FHL availability and letting tests (210 days available, 105 days actually let, etc.). Treated as a trade for tax purposes until 5 April 2025, with full mortgage interest deduction, capital allowances on furniture and fittings, and Business Asset Disposal Relief on sale. From 6 April 2025 the FHL regime was abolished by the Finance Act 2024: existing FHLs fall under standard property income rules and Section 24 mortgage interest restriction applies in full.
Rent a Room Relief
A scheme letting you earn up to £7,500 a year tax-free from letting a furnished room in your own home. The threshold halves to £3,750 if someone else (for example a partner) also receives income from the same letting. It applies to resident landlords with a lodger, not to a separate buy-to-let property.
Stamp Duty Land Tax (SDLT)
Tax on property purchases in England and Northern Ireland. Buy-to-let purchases above £40,000 incur a 5% surcharge on top of the standard rates (rising to higher in 2026). Check HMRC for current bands.