What is the 36 month rule?

The 36-Month Rule: What Homeowners Need to Know

For years, the so-called "36-month rule" offered a significant tax advantage to homeowners in the UK. It allowed individuals to sell their primary residence and be exempt from Capital Gains Tax (CGT) on any profit, provided they had lived in the property as their main home for at least part of the ownership period. Crucially, the rule granted a 36-month final period exemption — meaning even if you weren’t living in the property during the last three years before selling, that time would still count as tax-free.

This rule was particularly beneficial for people who rented out their homes or moved for work, as it reduced the CGT liability when selling property that hadn’t been continuously occupied. However, the landscape changed significantly after April 2020. The government revised the final period exemption, reducing it from 36 months to just 9 months for most property sales — a move aimed at tightening tax reliefs in the housing market.

Further updates came into effect from 6 April 2023, when the reporting and payment deadlines for CGT on property sales were also tightened. Now, taxpayers must report and pay any due CGT within 60 days of completion, down from the previous 30-day window.

It’s important to note that while the 36-month rule no longer applies broadly, certain exceptions remain — such as for individuals with disabilities or those in care homes. Also, anyone who sold their property before April 2020 may still benefit from the original 36-month exemption under the rules in place at the time.

With tax rules continually evolving, understanding how these changes impact your property sale is crucial. Always consult a tax professional to ensure compliance and to take full advantage of available reliefs.