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May 19, 2026Property Let Campaign Explained for UK Landlords
What Is the Property Let Campaign?
The Property Let Campaign is a disclosure facility introduced by HMRC for landlords who have not fully declared rental profits. It allows landlords to come forward voluntarily, correct previous tax returns, and settle any unpaid tax.
HMRC generally views voluntary disclosure more favourably than discovering undeclared income themselves. In many cases, penalties can be lower when landlords disclose issues before receiving direct contact from HMRC.
The campaign applies to a wide range of property-related income including:
- Buy-to-let rental income
- Holiday let income
- Overseas property income
- Renting out a room
- Short-term accommodation income
- Multiple property portfolios
Many landlords incorrectly assume HMRC cannot identify missing rental income. However, the amount of data available to HMRC has significantly increased in recent years.
How HMRC Identifies Undeclared Rental Income
One of the main reasons the Property Let Campaign has become more important is because HMRC now receives information from multiple third parties.
This can include:
Letting Agents
Letting agents may provide records showing rental payments, tenancy agreements, and landlord details.
Banks and Financial Institutions
Regular rental payments into bank accounts can indicate undeclared property income.
Tenancy Deposit Schemes
HMRC may compare tenancy deposit information with tax returns submitted by landlords.
Digital Platforms
Platforms such as Airbnb, Booking.com, and other online rental websites may share information regarding property income.
Land Registry and Property Records
Property ownership data can also be cross-checked against tax records.
Because HMRC uses advanced data-matching systems, landlords who believe their rental income is “invisible” may face serious issues later if discrepancies are identified.
Who Could Be Affected by the Property Let Campaign?
The Property Let Campaign does not only affect large landlords with extensive portfolios. Even landlords with one property can be affected.
Common situations include:
- Forgetting to register for Self Assessment
- Failing to declare rental profits
- Incorrectly claiming expenses
- Not reporting overseas rental income
- Underestimating taxable rental income
- Assuming losses remove reporting obligations
Some landlords also misunderstand the rules around allowable expenses, mortgage interest restrictions, and jointly owned properties.
In many cases, landlords may not intentionally avoid tax but still end up with incorrect filings due to misunderstanding the rules.
What Happens If HMRC Contacts You First?
If HMRC contacts a landlord before they voluntarily disclose issues through the Property Let Campaign, penalties can become significantly higher.
Potential consequences may include:
- Interest on unpaid tax
- Financial penalties
- Formal HMRC investigations
- Requests for historic records
- Extended compliance checks
The level of penalties often depends on whether HMRC believes the issue was careless, deliberate, or concealed.
Coming forward voluntarily can demonstrate cooperation and may help reduce penalties compared to waiting for HMRC to identify the issue independently.
How the Property Let Campaign Disclosure Process Works
The Property Let Campaign process generally involves several stages.
1. Notify HMRC
The landlord informs HMRC they intend to make a disclosure regarding undeclared property income.
2. Review Historic Income
Rental income, allowable expenses, and historic tax returns are reviewed carefully.
3. Calculate Tax Liabilities
Any unpaid tax, interest, and potential penalties are calculated.
4. Submit Disclosure
The disclosure is formally submitted to HMRC with supporting calculations.
5. Arrange Payment
Payment arrangements may sometimes be available depending on circumstances.
Accuracy during this process is extremely important because incomplete or incorrect disclosures can create additional problems later.
Common Mistakes Landlords Make
Many landlords unknowingly create issues by relying on assumptions or incomplete advice.
Common mistakes include:
- Assuming rental income below a certain amount does not need declaring
- Claiming private expenses as property expenses
- Forgetting overseas property income must often still be reported in the UK
- Not understanding mortgage interest relief changes
- Failing to maintain accurate records
Poor record keeping can make historic disclosures more difficult and increase the risk of errors.
How Landlords Can Stay Compliant Going Forward
Once historic issues are resolved, landlords should focus on maintaining proper compliance moving forward.
Important steps include:
- Keeping organised records
- Tracking rental income accurately
- Separating personal and property finances
- Understanding allowable expenses
- Filing tax returns on time
- Reviewing tax positions regularly
As Making Tax Digital rules continue developing, digital record keeping may become increasingly important for landlords in the future.
Final Thoughts on the Property Let Campaign

The Property Let Campaign is a reminder that HMRC continues increasing its focus on property income compliance across the UK.
With access to information from banks, letting agents, tenancy deposit schemes, and digital platforms, undeclared rental income is becoming easier for HMRC to identify.
For landlords who may have errors or undeclared profits, addressing issues proactively is often far better than waiting for HMRC to initiate contact.
At Taxes Done Right Ltd, we help landlords review their tax position, correct issues properly, and remain compliant moving forward.
Need help deciding what’s best for your situation?
📞 Call 0161 710 1901
📧 Email Tax@TaxesDoneRight.co.uk
🌐 Visit www.taxesdoneright.co.uk




