The Principles of Capital Gains Tax for Married Couples
When you own a buy-to-let property with a spouse or civil partner, the default position for HM Revenue and Customs (HMRC) is that you own it in equal shares. This applies to both the rental income you receive while you own the property and any capital gain you realise when you sell it. Capital Gains Tax (CGT) is the tax paid on the profit made from the increase in value of an asset. For residential property that is not your main home, the rates are currently set at 18% for basic rate taxpayers and 24% for higher or additional rate taxpayers.
The calculation of the gain starts with the difference between the price you paid for the property and the price at which you sold it. Each individual has a personal annual exempt amount, which is a small tax-free allowance for the year. After this allowance is deducted, the remaining profit is added to your other taxable income for that tax year to determine which CGT rate applies. If one spouse earns significantly more than the other, their portion of the gain may be taxed at the 24% rate, while the lower-earner might still have some of their basic rate band available to pay at 18%.
Joint Tenants vs Tenants in Common
To understand how to adjust your tax liability, you must first understand the way the property is legally held. Many couples purchase property as joint tenants. This means you both own the whole property together, and if one person dies, the ownership automatically passes to the survivor. From a tax perspective, joint tenants are always treated as having a 50/50 split of the income and gains.
To change the proportion of ownership for tax purposes, you must first ensure you hold the property as tenants in common. This legal arrangement allows you to own specific, separate shares of the property, such as 70/30 or 90/10. If you currently hold the property as joint tenants, you can usually sever the joint tenancy to become tenants in common by using a formal notice and updating the Land Registry. This is a common step for couples where one partner is in a higher tax bracket and they wish to allocate more of the gain to the partner in the lower bracket.
The Declaration of Trust and Form 17
A Declaration of Trust is a legal document that confirms the actual beneficial interest each person has in a property. While the Land Registry might show both names, the Declaration of Trust provides the evidence of how the value of the property is truly divided. This is the document HMRC requires to see that you have moved away from the standard 50/50 split.
However, simply having a Declaration of Trust is not enough for married couples and civil partners. HMRC will still assume a 50/50 split for tax purposes unless you formally notify them using Form 17 (Declaration of income for joint property and income). This form must be submitted alongside evidence of the unequal split, such as the Declaration of Trust. It is important to note that Form 17 can only be used if the beneficial interest actually matches the income split. You cannot claim a 90/10 split for tax if you are actually sharing the proceeds 50/50.
Scenario: Higher Rate vs Basic Rate Taxpayer
Consider a couple selling a buy-to-let property with a total capital gain of £60,000. Under a standard 50/50 split, each spouse is responsible for £30,000 of the gain. If Partner A is a higher-rate taxpayer, they will pay 24% CGT on their £30,000 (minus their allowance). If Partner B has no other income or is a basic rate taxpayer, they might pay only 18% on their £30,000 (minus their allowance).
If the couple had a Declaration of Trust in place for a 90/10 split in favour of Partner B, the higher-earner (Partner A) would only be liable for £6,000 of the gain. The lower-earner (Partner B) would be liable for £54,000. This could result in a much larger portion of the total profit being taxed at 18% rather than 24%, potentially saving thousands of pounds in tax. This strategy must be implemented and the Form 17 submitted to HMRC while you still own the property; you cannot apply it retrospectively after the sale has completed.
Deductible Costs and Allowances
Before calculating the final tax bill, it is essential to subtract all allowable expenses. These costs can significantly reduce the taxable gain. Common deductions include:
- Purchase costs: Professional fees for solicitors, surveyors, and Stamp Duty Land Tax paid at the time of acquisition.
- Improvement costs: Capital expenditure on the property, such as building an extension or installing a new central heating system, provided these were not simple repairs or maintenance.
- Sale costs: Estate agent fees, legal fees for the sale, and advertising costs.
Each spouse also applies their own annual exempt amount. For the current tax year, this sits at £3,000. While this allowance has been reduced in recent years, it still provides a useful deduction for each person named on the title.
Common Pitfalls and HMRC Compliance
One common mistake is failing to submit Form 17 within the 60-day time limit after signing the Declaration of Trust. If the form is sent late, HMRC will not recognise the unequal split for any period before the notification. Another pitfall is the failure to report and pay the CGT within the 60-day window following the completion of the sale. This is a mandatory requirement for UK residents selling residential property; you cannot simply wait for your end-of-year Self Assessment tax return.
Furthermore, any shift in ownership must be genuine. If a couple changes the ownership split purely for a sale and then moves it back immediately after, HMRC may view this under anti-avoidance rules. There are also Stamp Duty Land Tax implications to consider if there is a mortgage on the property; transferring a share of a property with a mortgage can sometimes trigger a stamp duty charge if the portion of the debt being taken on exceeds certain thresholds.
Practical Next Steps for Landlords
If you are planning to sell a jointly owned buy-to-let, start by reviewing your current legal ownership. If you are joint tenants, you will need to discuss severing that tenancy with a solicitor to become tenants in common. You should then have a Declaration of Trust drawn up to reflect the desired ownership proportions based on your respective income tax bands.
Once the legal work is done, ensure Form 17 is completed and sent to HMRC with the supporting deed. Remember that this change will also affect how you report your rental income on your annual tax returns from that point forward. Finally, as the sale approaches, gather all records of your original purchase price and any capital improvements made over the years to ensure you are only paying tax on the true profit. Taking these steps early allows for a much more efficient tax position when the time comes to dispose of the asset. Following asset.