Private Residence CGT Relief: rules for Capital Gains Tax on your main home in 2026/27
Private Residence CGT Relief is one of the most important Capital Gains Tax reliefs available to homeowners in the UK. It can remove or reduce a Capital Gains Tax liability when you sell a property that has been your main home. In most cases, selling your main residence does not result in a Capital Gains Tax charge because the gain is covered by Private Residence Relief. However, the rules are more complex where a property has been rented out, used partly for business purposes, owned alongside another home or not occupied as the owner’s main residence throughout the ownership period. Understanding the Private Residence Relief rules is essential because a property that qualifies fully for relief may have no CGT liability, while a property that only qualifies partially may create a taxable gain. Any taxable portion is then charged under the wider CGT and Income Tax rules explained in our ultimate guide to personal tax in the UK. This guide explains how Private Residence Relief CGT works, when relief applies, situations where only partial relief is available and how the rules affect Capital Gains Tax on main home disposals.What is Private Residence CGT Relief?
Private Residence CGT Relief, also known as Private Residence Relief or main residence relief, applies when an individual sells a property that has been their only or main home. The purpose of the relief is to prevent homeowners from paying Capital Gains Tax on increases in value of their genuine family home. Where relief doesn’t fully apply, the wider rules on tax when you sell property determine how any remaining gain is calculated. Where full relief applies, the entire gain from selling the property is exempt from CGT. However, the relief depends on how the property has been used during ownership. A property purchased purely as an investment, such as a buy-to-let property that has never been occupied as the owner’s home, will not normally qualify.When does Private Residence Relief apply?
Homeowners will usually qualify for full Private Residence Relief CGT where all the required conditions are met. The property must generally have:- Been the owner’s only or main residence throughout the ownership period.
- Been occupied as a genuine home rather than acquired mainly to make a gain.
- Not been used exclusively for business purposes.
- Had grounds and buildings within the permitted area limits.
Private Residence Relief rules and qualifying conditions
The main Private Residence Relief rules focus on how the property has been occupied and used.The property must be your main residence
You can only claim main residence relief on a property that has genuinely been your home. Factors that may indicate a property is your main residence include:- The address used for official correspondence.
- Where you are registered to vote.
- Where your personal belongings are kept.
- The length and quality of occupation.
- Your intention when occupying the property.
The property must not have excessive private grounds
Private Residence Relief can include gardens and grounds that are considered appropriate for the size and character of the property. Generally, relief applies where the total area of land, including buildings and grounds, does not exceed 5,000 square metres unless a larger area is required for the reasonable enjoyment of the property.The property must not have exclusive business use
Using part of your home occasionally for work does not usually prevent you from claiming relief. For example, working from a spare bedroom occasionally or using a room as a temporary office would not normally affect your claim. However, if part of the property has been used exclusively for business purposes, there may be a restriction on the relief available for that part.When Private Residence Relief may not apply
Private Residence Relief may not be available or may only apply partially where:- The property was bought as an investment.
- The owner never lived there as their main residence.
- A part of the property was used exclusively for business.
- The property was rented out for periods after the owner moved away.
- The property was not occupied as a genuine home.
Capital Gains Tax on main home with partial relief
Not every homeowner receives complete exemption. In some situations, only part of the gain may qualify for relief. This can happen where:- You lived in the property for only part of the ownership period.
- You rented out the property after moving elsewhere.
- You owned another property and nominated a different main residence.
- A section of the property had exclusive business use.
The final 9 months ownership exemption
One important part of main residence relief is the final period exemption. If a property has been your main residence at some point during ownership, the final nine months of ownership are generally treated as exempt for CGT purposes, even if you were not living there when it was sold. This rule helps homeowners who have moved into another property but have not yet completed the sale of their previous home.Extended final period exemption rules
In limited circumstances, the final period exemption can be extended beyond nine months. A longer exemption period may apply for certain homeowners who:- Are disabled.
- Move into long-term residential care.
- Meet specific HMRC conditions.
Letting your home and Private Residence Relief
Renting out a former main residence can affect the amount of relief available. Historically, some landlords benefited from wider Letting Relief rules, but these have been significantly restricted. In most cases today, Letting Relief is only available where the homeowner has also lived in the property while letting part of it to a lodger. Simply moving out and renting the whole property does not usually create entitlement to Letting Relief. For a fuller explanation of exactly when this narrower relief still applies, our guide on how PRR works alongside Lettings Relief sets out the conditions in more detail.Business use and Private Residence Relief CGT
Using your home for work does not automatically prevent you from claiming relief. The key distinction is whether part of the property is used exclusively for business purposes. Examples:- A spare bedroom occasionally used for working from home would normally remain part of the exempt residence.
- A room used only as a business office with no private use may restrict relief on that part.
Joint ownership, spouses and civil partners
Married couples and civil partners can only have one main residence for Private Residence Relief purposes at any one time. Where a couple owns more than one property, they may need to consider which property qualifies as their main residence. Joint owners generally calculate their own share of the gain and apply relief based on their individual ownership and occupation history.Example of Private Residence Relief CGT
James buys a home for £300,000 and later sells it for £500,000. During the entire ownership period, the property was his only main residence and there was no exclusive business use. The gain is £200,000, but the full amount qualifies for Private Residence Relief, meaning no Capital Gains Tax is payable. In contrast, if James had lived in the property for only part of the ownership period and rented it out afterwards, only the qualifying period may benefit from relief.Common mistakes with main residence relief
Homeowners often make mistakes when applying Private Residence Relief CGT rules. Common issues include:- Assuming every property sale is automatically exempt.
- Failing to keep evidence of occupation.
- Ignoring periods where the property was rented out.
- Assuming a short occupation period automatically creates main residence status.
- Not reviewing ownership before buying an additional property.
Key takeaways
Private Residence CGT Relief can remove Capital Gains Tax when selling a genuine main home, but eligibility depends on how the property was owned and used. The main Private Residence Relief rules require the property to have been your only or main residence, with restrictions applying to investment properties, exclusive business use and certain letting situations. Understanding the rules before selling can help homeowners identify whether they qualify for full relief, partial relief or need to plan for a potential Capital Gains Tax liability. Where any tax is due, it’s important not to forget to report property gains within the 60-day deadline that applies to UK residential property sales.Case Study: Checking Main Residence Status Before Selling a Property
A homeowner visited our Wimbledon office before selling a property that had been their home for several years before becoming a rental property. They wanted to understand whether they could claim Private Residence CGT Relief and how the period of personal occupation and letting would affect their potential Capital Gains Tax liability.
During the consultation, we reviewed the property’s ownership history, occupation periods, rental arrangements and available records to determine how much of the gain could qualify for Private Residence Relief CGT. We explained how main residence relief is calculated where a property has mixed use, including the impact of the final nine months exemption, restricted Letting Relief rules and the importance of keeping evidence that the property was genuinely used as a main residence.
Following the review, the homeowner understood which parts of the gain could be exempt, what potential CGT exposure remained and the steps required before completing the sale. This allowed them to plan the disposal with greater confidence and ensure any taxable gain would be calculated correctly under the 2026/27 rules.
