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Case of the month Feb 26

February 26, 2026
Real estate ‘Sold’ sign

Capital Gains Tax on the sale of a rental property

Introduction

Mrs B had owned a buy-to-let property for several years and decided to sell when the property market improved.  While she expected there would be Capital Gains Tax (CGT) to pay, she was unsure how the gain should be calculated or what HMRC reporting obligations applied. 

The issue

Like many landlords, Mrs B assumed the gain would simply be the sale proceeds less the original purchase price. However, once the records were reviewed, additional factors needed to be considered, including legal fees, estate agent commission, and enhancements incurred during ownership. 

She was also unaware of the 60-day reporting requirement for UK residential property sales, which can result in penalties and interest if missed.  

Mrs B wanted to ensure the position was reported correctly and that all allowable deductions were claimed. 

How we solved it

We reviewed the full ownership history and prepared the CGT calculation, including checking the treatment of improvement costs and identifying allowable deductions. 

Once the figures were finalised, we prepared and submitted the 60-day CGT return and ensured the disposal was correctly reflected on her Self-Assessment return. 

Outcome

Mrs B understood exactly what tax was due and had the position reported on time, without any last-minute pressure following completion.  

The calculation was fully supported with records and workings, giving her peace of mind that the disposal had been dealt with correctly and in line with HMRC requirements.

Client Benefit

Mrs B avoided missing the 60-day deadline, claimed all appropriate deductions, and had confidence that she had paid the correct amount of tax, and no more than necessary. 

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