Private Residence Relief Explained

What PRR Covers

Private Residence Relief exempts the gain on your only or main residence from CGT. If you own one property and it has been your main home throughout your entire period of ownership, the full gain is exempt. You do not need to claim the relief, it applies automatically, and you are not required to report the disposal on a Self Assessment return.

The relief also covers the final 9 months of ownership, regardless of whether you are still living in the property. This grace period exists to help people who have moved out before completing the sale, for example after buying a new home and needing time to sell the old one. If you moved out 6 months before completion, those 6 months are still counted as a period of main residence. If you moved out 18 months before completion, only the last 9 months of that gap are covered; the other 9 months are potentially chargeable.

Partial PRR, Let Property and Periods of Deemed Occupation

If you lived in the property for only part of your ownership period, PRR is apportioned. The exempt fraction is the proportion of time the property was your main residence (plus the final 9 months), divided by the total ownership period. Periods of absence can be treated as periods of occupation in certain circumstances, these are called deemed occupation periods. They include the last 9 months, any period working abroad for any length of time, and any period working elsewhere in the UK (up to 4 years), provided the property was your main residence before and after the absence.

Let Property Relief used to provide a further exemption for periods when the property was let while you were absent, but the rules changed significantly from April 2020. The relief now only applies in situations where the owner is in shared occupation with the tenant, a narrow set of circumstances that does not cover standard buy-to-let periods. For most people who have let their former main home, Let Property Relief is no longer available.

When PRR Goes Wrong

Several situations can unexpectedly reduce or eliminate PRR. Using part of your home exclusively for business, a room used only as an office, not as a room that doubles as an office, means that portion of the gain does not qualify for PRR. The key word is exclusively: a room used sometimes for work and sometimes as a bedroom retains PRR, but a dedicated office that was never used as living space does not. This is a common trap for the self-employed.

Development land is another area where PRR can be challenged. If you sell your garden or grounds separately, or if the sale price reflects development potential rather than residential use, HMRC may argue that part of the gain relates to the development value rather than the residence itself. The interaction between PRR and development gains requires careful analysis. Similarly, converting a property from a main home to a buy-to-let before selling it creates a period of non-residence that is fully chargeable.

PRR and Marriage, One Main Residence Per Couple

Married couples and civil partners can only nominate one property as their main residence for PRR purposes at any given time. If both spouses own separate properties, only one can be the couple's main residence, the same property applies to both of them. There is no ability for each spouse to separately claim PRR on different properties simultaneously.

The election process allows couples who own more than one property to nominate which one is treated as the main residence. The election must be made within two years of acquiring the second property. If no election is made, HMRC looks at the facts of occupation. For couples buying a second property, a holiday home, a property for a child, understanding this election and making it promptly is essential to preserve PRR on the intended main home.