UK Married Couple's Allowance Calculator
For couples where one was born before 6 April 1935. Reduces tax bill by up to £1,108 (2024-25).
⚠ 2024-25 UK tax-year figures. Estimates only — consult HMRC or a tax adviser.
About this tool
UK Married Couple's Allowance Calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Tax & Government — UK. Browse more Tax & Government — UK tools.