Lettings Relief

Lettings Relief is a specialized Capital Gains Tax (CGT) mechanism engineered to reduce your tax exposure when selling a residential property that served as your primary home but also generated rental income.

Following sweeping legislative overhauls, the statutory boundary for this relief is exceptionally narrow. It is structured to completely exclude standard buy-to-let properties, making it applicable only to a specific, live-in residential layout.

The Co-Occupancy Qualification Threshold

To legally qualify for Lettings Relief when disposing of a property, you must satisfy a strict co-occupancy standard:

The Shared Occupancy Rule: You must have physically resided in the dwelling house as your only or main residence at the exact same time that the tenant was renting the accommodation.

This means the relief is reserved exclusively for "live-in landlord" configurations where you take a lodger into your family home. If you move out of your home entirely, pack your belongings, and let the whole property to a tenant under an Assured Shorthold Tenancy (AST), you are completely disqualified from claiming Lettings Relief on that rental block, regardless of how many years you previously lived there.

Interaction with Private Residence Relief (PRR)

Lettings Relief can never be claimed in isolation. It functions strictly as an extension of Private Residence Relief (PRR), which shields your main home from Capital Gains Tax.

When you sell a property that has been your main home, the tax system uses a pro-rata month-counting formula to separate your tax-free residential months from your taxable letting months:

• The Final 9-Month Buffer: Provided the property was your main home at some point during your ownership, the final 9 months before completion are automatically treated as tax-free deemed occupation under PRR rules, even if you were living elsewhere or a lodger was in place.
• The Exclusive Use Trap: If you take in a lodger and grant them completely exclusive, lockable use of a specific room or zone where you provide zero household services (like cleaning or communal meals), that precise square-footage percentage of the house is stripped of standard PRR. This creates a partial, taxable capital gain on that zone when you sell—and this is the exact pocket of tax that Lettings Relief is designed to offset.

How Lettings Relief Is Formally Calculated

Where your live-in lodger arrangement creates a taxable capital gain, Lettings Relief activates to reduce that specific taxable chunk. The amount of relief subtracted from your profit is capped at the lowest of three statutory caps:

1. The total amount of Private Residence Relief (PRR) already credited to the disposal.
2. The exact amount of the capital gain that is mathematically attributable to the specific period the property was let.
3. An absolute statutory ceiling of £40,000 per individual owner.

Because of the co-occupancy restriction, hitting the maximum £40,000 relief cap is rare. Most standard home-sharing setups only generate small paper gains on the lodger's bedroom, meaning the relief simply wipes out that micro-gain completely, reducing the liability to zero.

Settling Your Final Bill: 2026/27 CGT Rates

Any remaining capital gains that slip past your PRR and Lettings Relief allocations are subject to the current residential property tax bands, after you subtract your personal £3,000 Annual Exempt Amount.

The remaining taxable gain is stacked directly on top of your personal income for the year to see where it lands within the basic-rate tax band:

Key Points to Remember

• Lettings Relief is strictly restricted to shared-occupancy scenarios where the landlord and tenant live together.
• Landlords who move out completely and execute standard whole-house tenancies are entirely barred from claiming the relief.
• The relief serves as a protective buffer for main homes where a lodger's room has been disqualified from full PRR.
• The automatic final 9 months of property ownership are always tax-exempt under standard PRR guidelines.
• The maximum value of the relief is capped at the lowest of your PRR value, the letting gain, or a flat £40,000 per owner.
• Remaining residential property capital gains are taxed at 18% or 24%, subject to your personal £3,000 annual allowance.