Do I Need to Tell HMRC About My Rental Income?

If you're renting out property in the UK, you may need to tell HMRC about the income—even if you don't owe any tax on it. Whether you're letting a spare room, your entire home, or an investment property, the rules depend on how much you earn and what you're renting out. This article explains when you must register, what the property allowance covers, and the consequences of not reporting.

When You Must Tell HMRC About Rental Income

You need to inform HMRC if you receive income from renting out land or property. This applies whether you advertise through an online marketplace, use an estate agent, or place an advert in the newspaper.

The requirement to tell HMRC applies to rental income from:

• A room in your main home, including bed and breakfast arrangements
• Your entire main home
• A property that is not your main home (such as a buy-to-let investment)
• Land, such as renting out your driveway

Even if your rental income falls below the tax-free threshold, you may still need to register it with HMRC depending on your circumstances.

Understanding the Property Allowance

The property allowance is a tax relief that can make your rental income tax-free up to a certain amount. While the source material confirms HMRC may need to know about your rental income even when no tax is due, the specific property allowance threshold and how it works should be verified through HMRC's checking tool.

When working out whether you need to tell HMRC, you'll need to consider:

• How much rental income you received or expect to receive during the tax year
• Whether you share this income with someone else
• Whether you receive other income from renting out other land or property

How to Check Your Reporting Requirement

HMRC provides an online tool to help you determine whether you need to declare your rental income. Before using the tool, gather information about:

• The total amount you received or expect to receive during the tax year (2025/26)
• Any income-sharing arrangements with another person
• Other rental income you receive from different properties or land

The checking tool uses this information to work out your reporting obligation. You can access it through HMRC's online services.

The same tool also helps if you need to check whether to report income from selling goods, personal possessions, or providing services.

What Happens If You Don't Report Rental Income

If you're required to tell HMRC about your rental income and fail to do so, you may face penalties. HMRC treats unreported rental income seriously because it's considered tax evasion when done deliberately.

The consequences can include:

• Penalties based on the amount of unpaid tax
• Interest charges on any tax owed from the date it should have been paid
• Investigation into your tax affairs
• Potential prosecution in serious cases

Even if you make an honest mistake, you can still face penalties, though these are lower than for deliberate non-compliance. If you discover you've failed to report rental income from previous years, it's better to tell HMRC voluntarily through their Let Property Campaign or Self Assessment system rather than wait for them to discover the omission.

Registering for Self Assessment

When you determine that you need to tell HMRC about your rental income, you'll need to register for Self Assessment if you're not already registered. This means you'll complete a tax return each year declaring your rental income and any allowable expenses.

You must register by 5 October following the end of the tax year in which you first received rental income that needs to be reported. For rental income received in the 2025/26 tax year (which runs from 6 April 2025 to 5 April 2026), you'd need to register by 5 October 2026.

Next Steps

Use HMRC's online checking tool to determine your specific reporting requirement. Have your rental income figures ready, including details of any properties or land you rent out and whether you share the income with anyone else.

If the tool confirms you need to register, set up Self Assessment through your Government Gateway account. Keep records of all rental income received and any expenses related to the property, as you'll need these for your tax return.

If you're unsure about any aspect of reporting rental income—particularly around allowable expenses, property allowances, or how your specific rental arrangement should be treated—seek professional advice before completing your registration or tax return.

Sources

• Check if you need to tell HMRC about your rental income

This article provides general guidance based on current HMRC rules. For advice specific to your situation, speak to your accountant.