Marriage Allowance backclaim planner
Map the current claim and four backdated tax years, estimate the couple-level gain, and choose the correct HMRC route.
Build the five-year claim map
Use taxable income for each person as a screening input. Recheck each year separately before submitting a claim.
5 potentially eligible tax years
Estimated couple-level total: £570
2022/23: £114 · Backdated claim
2023/24: £114 · Backdated claim
2024/25: £114 · Backdated claim
2025/26: £114 · Backdated claim
2026/27: £114 · Current online claim
Decision guides
Marriage Allowance eligibility checkCheck the lower earner, receiving partner and relationship conditions before claiming.Backdate up to four tax yearsMap the rolling backclaim window and exclude years before marriage or civil partnership.Estimate the couple-level refundSee the headline saving and any tax created for the transferring partner.Marriage Allowance in ScotlandFlag the separate Scottish income-tax bands before relying on an eligibility result.Marriage Allowance and Self AssessmentIdentify which partner completes the transfer section and the filing order.M and N tax codesUnderstand how HMRC normally reflects the transfer in each partner’s tax code.Backclaim after a partner diesUse the dedicated HMRC contact route and prepare the relevant years.Year-by-year evidence checklistRecord both incomes, other income, relationship dates, tax codes and claim status.
Method and limits
The engine maps the current year and four reclaimable years, checks the relationship start, and offsets the lower earner’s estimated tax against the recipient’s saving. It deliberately requires a separate basic-rate-band check and does not submit a claim.