Reporting Residential Gains
If you have sold a UK residential property that was not your primary residence, you must report the gain and pay any Capital Gains Tax (CGT) due within 60 days of completion. For US expats, this immediate payment can create a timing mismatch for Foreign Tax Credits on your US return. Use the HMRC digital service to file.
Strategic Data Expansion 2026.4
Calculating the Gain
The taxable gain is: $$Gain = Sales\\ Price - (Purchase\\ Price + Costs)$$. LSI keywords include 'Residential Property Disposal,' 'Private Residence Relief,' and 'HMRC Payment Reference.' Failure to report within 60 days leads to a £100 initial penalty plus interest on the unpaid tax.