If you own a rental property with your husband, wife, or civil partner, it’s important to understand how HMRC taxes rental income.

Many landlords assume they can choose how to split rental income between themselves, but HMRC has specific rules that must be followed.

Let’s look at how it works.

How Is Rental Income Normally Split?

If a rental property is jointly owned by married spouses or civil partners, HMRC will usually assume that the rental profit is split equally between them.

This means each person is taxed on 50% of the rental profit, regardless of who paid for the property or who receives the rent.

Example

John and Sarah are married and jointly own a buy-to-let property.

The property generates £10,000 of rental profit during the tax year.

HMRC will normally tax:

• John on £5,000
• Sarah on £5,000

This is known as the default 50:50 split.

What If You Own Different Shares?

Some couples own a property in unequal shares.

For example:

• Sarah owns 80%
• John owns 20%

In these cases, HMRC will still apply the 50:50 rule unless the couple takes additional steps.

What Is Form 17?

If married couples or civil partners own a property in unequal beneficial shares, they can ask HMRC to tax the rental profit according to their actual ownership percentages.

To do this, they must:

• Own the property in unequal beneficial shares.
• Usually hold the property as tenants in common.
• Complete and submit Form 17 to HMRC.
• Provide evidence of the ownership split, such as a declaration of trust.

It’s important to remember that Form 17 does not create the ownership split. It simply tells HMRC about an ownership arrangement that already exists.

Example of an Unequal Split

Let’s say Sarah is a basic-rate taxpayer and John is a higher-rate taxpayer.

They own a rental property with beneficial ownership split as follows:

• Sarah: 80%
• John: 20%

The property generates £10,000 of rental profit.

After submitting a valid Form 17, the profit may be taxed as:

• Sarah: £8,000
• John: £2,000

This could reduce the couple’s overall tax bill because more of the income is being taxed at a lower rate.

Important Things to Remember

Before changing ownership shares, keep the following in mind:

• Form 17 is only available to married couples and civil partners.
• The ownership split must reflect genuine beneficial ownership.
• You cannot choose any percentage simply to save tax.
• HMRC may ask for evidence supporting the ownership arrangement.
• Any changes should be properly documented and legally recorded.

Final Thoughts

For most married couples and civil partners, rental profits from jointly owned property are taxed on a 50:50 basis. However, if you genuinely own the property in different proportions, you may be able to have the profits taxed according to your actual ownership shares by submitting Form 17.

Because property ownership and tax rules can be complex, seeking professional tax advice before making changes can help ensure you’re fully compliant with HMRC requirements while making the most of available tax planning opportunities.

Need help with rental property tax planning? Our team can help you understand your options and ensure your property income is reported correctly.