NOT financial advice - seek advice from a professional for your specific situation

    TaxKilnUK tax guidance
    TaxKilnUK tax guidance

    Marriage Allowance

    Marriage Allowance lets the lower-earning spouse or civil partner transfer £1,260 of their Personal Allowance to the higher earner, reducing the higher earner's tax bill by up to £252 per year. Eligibility: lower earner must have income below £12,570 (Personal Allowance unused); higher earner must be a basic-rate taxpayer with income between £12,571 and £50,270 (higher-rate + additional-rate taxpayers cannot receive the transfer). Claims can be backdated up to 4 previous tax years, potentially generating over £1,000 in rebates for couples who didn't realise they were eligible.

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    What this relief is, in plain English

    Marriage Allowance is the UK's transferable Personal Allowance for married couples + civil partners. The mechanic is straightforward: if one spouse earns below the £12,570 Personal Allowance + the other is a basic-rate taxpayer, the lower earner can transfer £1,260 (10%) of their unused PA to the higher earner. This reduces the higher earner's taxable income by £1,260 → saves £252 per year (20% × £1,260). Marriage Allowance is one of the most under-claimed reliefs in the UK. HMRC has run multiple awareness campaigns because around 2 million eligible couples don't claim. The 4-year backdating window means new claimants can recover up to £1,000+ in historical rebates on a single claim. For business owners whose spouse is below the PA threshold (common for owner-managed Ltd Co structures or sole-trader families with one parent at home), the allowance is a straightforward annual saving worth claiming the moment eligibility is met.

    How it works

    £1,260 transfer from lower to higher earner

    The lower-earning spouse / civil partner transfers £1,260 of their £12,570 Personal Allowance to the higher earner. The lower earner's PA reduces from £12,570 to £11,310; the higher earner's PA increases from £12,570 to £13,830. The higher earner's tax bill reduces by 20% × £1,260 = £252 per year (assuming basic-rate position). The transfer is fixed at £1,260, you cannot transfer partial amounts.

    Eligibility, strict income bands

    Lower earner: income BELOW the £12,570 Personal Allowance threshold (so the PA is unused or partially unused). Higher earner: BASIC-RATE TAXPAYER with income between £12,571 and £50,270. Higher-rate + additional-rate taxpayers (income above £50,270) cannot receive the transfer. Both partners must be married or in a civil partnership (cohabiting couples excluded). Both UK resident, or the non-resident partner receives a UK Personal Allowance.

    Claim process

    The LOWER-earning partner makes the claim online via gov.uk/marriage-allowance. Required: both NI numbers + identity verification (P60, bank account details, or Government Gateway). Once accepted, the allowance transfers automatically each tax year until cancelled. The higher earner's PAYE tax code changes (e.g. from 1257L to 1383M) reflecting the increased PA. Self-employed higher earner: the £252 reduction applies on their Self Assessment calculation.

    Backdating up to 4 previous tax years

    Marriage Allowance claims can be BACKDATED up to 4 previous tax years (currently 2021/22 onwards as of 2025/26). For a couple eligible across all 4 years who haven't claimed, the backdated rebate is 4 × £252 = £1,008. Backdating is handled automatically when the claim is submitted online, HMRC checks eligibility for each year + issues the rebate as a payment OR reduction in current-year tax. The backdating window is the most under-utilised aspect, many newly-aware couples recover £1,000+ on a single claim.

    Who qualifies

    Interactions with other reliefs

    Personal Allowance taper (£100k+)

    Marriage Allowance eligibility uses TAXABLE INCOME (not adjusted net income for HICBC purposes). A higher earner whose income is above £50,270 from gross figures but reduced below via pension contributions may still fail Marriage Allowance eligibility because gross income is the test. Pension planning helps HICBC + tapered PA + tapered annual allowance, but NOT Marriage Allowance, which is binary basic-rate/higher-rate.

    Married Couple's Allowance (legacy)

    Different + older relief for couples married/CP'd before 5 December 2005 where ONE partner born before 6 April 1935. Largely historical population. Marriage Allowance + Married Couple's Allowance are mutually exclusive, claim whichever produces bigger saving (usually Marriage Allowance for newer couples). HMRC's eligibility tool defaults correctly.

    Personal Savings Allowance + Dividend Allowance

    These are separate per-individual allowances. Marriage Allowance transfers PA only; PSA + Dividend Allowance stay with each individual. The higher earner who receives the £1,260 PA transfer still has their own £1,000 PSA (basic-rate) + £500 Dividend Allowance. The reliefs stack independently.

    Dividend extraction timing for Ltd Co directors

    If a Ltd Co director's spouse is below PA, timing dividend extraction to stay basic-rate (under £50,270 total) preserves Marriage Allowance eligibility. Pushing into higher rate by extracting £55,000 in salary + dividends loses the £252/year + creates a higher dividend tax cost. Spread extraction across years to stay basic-rate where possible, particularly valuable for retiring owners whose spouse has zero income.

    Common mistakes + audit triggers

    Worked example

    Marcus + Liam, Manchester - Marcus (sole trader graphic designer, basic-rate) + Liam (civil partner, recently career-broken, zero income) (2025/26 + backdated to 2021/22)

    Marcus runs sole trader graphic design business 2025/26 with profit £35,000, basic-rate taxpayer (£35,000 between £12,571 and £50,270). Liam took career break to care for elderly parent + has £0 income for the tax year (well below £12,570 PA). They've been in civil partnership for 6 years but have NEVER claimed Marriage Allowance.

    Calculation: **Current-year 2025/26 claim:** - Liam (lower earner, £0 income) transfers £1,260 PA to Marcus - Marcus's PA increases from £12,570 to £13,830 - Marcus's taxable profit reduces by £1,260 effectively → tax saving 20% × £1,260 = **£252** **Backdated claim covering 2021/22 + 2022/23 + 2023/24 + 2024/25:** Liam has been a stay-at-home carer for all 4 previous tax years. Marcus has been a basic-rate sole trader in all 4 years. All 4 years pass eligibility test. - Backdated rebate: 4 × £252 = **£1,008** - Issued as cash payment from HMRC OR reduction in current-year tax **Total recoverable on this single claim: £1,260 (£252 current year + £1,008 backdated)** **Process:** 1. Liam goes to gov.uk/marriage-allowance + claims online (lower earner makes the claim) 2. Provides both NI numbers + Liam's identity proof (bank details or P60) 3. HMRC processes claim + backdate within 6-8 weeks 4. Marcus's tax code updates to 1383M (PA increased) 5. Annual saving continues each tax year automatically until cancelled **Strategic note:** As Marcus's business grows + approaches £50,270, monitor whether dividend extraction (if he incorporates) would push him into higher rate + lose Marriage Allowance. Below £50,270 = retain the £252/year + the £1,260 PA flexibility. Above £50,270 = lose Marriage Allowance entirely.

    Statute reference: Income Tax Act 2007 + Finance Act 2014 (Marriage Allowance provisions) ITA 2007 ss.55A–55E. HMRC manual: PA1010.

    Frequently asked questions

    What happens if I miss the Self Assessment deadline?+
    The Self Assessment deadline is 31 January (online filing) for the previous tax year. Miss it and HMRC apply an automatic £100 penalty. Beyond that: £10 per day from 3 months late (capped at £900), 5% of tax due at 6 months late, and another 5% at 12 months late, under Schedule 55 of the Taxes Management Act 1970. If you have a genuine reason (serious illness, bereavement, technical issue with HMRC's systems) you can appeal with evidence; HMRC accepts reasonable excuse appeals in most genuine cases.
    Do I need an accountant or can I file Self Assessment myself?+
    Legally you can file Self Assessment yourself via gov.uk for free, most simple sole-trader returns (single income source, basic expenses) are realistic to self-file. An accountant adds real value when: your trading profit is above £40,000 (extraction-strategy decisions matter), you have multiple income streams (PAYE + self-employment + property + dividends), you've crossed the £90,000 VAT threshold, you're considering incorporation, or you have an HMRC enquiry. Expect to pay £400-£1,500/year for a typical sole-trader accountant; the cost is itself a deductible expense.
    How do payments on account work?+
    When your Self Assessment tax bill exceeds £1,000 for the first time, HMRC requires payments on account toward NEXT year's tax. Half the current bill is due 31 January (alongside the current bill); the other half is due 31 July. So your first January after crossing the threshold can hit with a double-bill: last year's balance + first payment on account. Adjust via Form SA303 if you expect next year's income to drop substantially. Payments on account don't apply if more than 80% of your tax is collected via PAYE.
    I'm a sole-trader with profits around £15,000 + my spouse is a stay-at-home parent earning nothing, can we claim Marriage Allowance?+
    Yes, perfect candidate scenario. Your spouse (lower earner, £0 income, well below £12,570 PA) transfers £1,260 of PA to you (higher earner, £15,000 income, basic-rate taxpayer between £12,571 and £50,270). You save 20% × £1,260 = £252 in income tax annually. If you've had this household structure for 4+ previous tax years + never claimed, backdate the claim for an immediate £1,000+ rebate (4 × £252 = £1,008). Claim online at gov.uk/marriage-allowance using both NI numbers + proof of identity (P60 or bank account details).
    My Ltd Co dividend extraction puts me in the higher-rate band, can I still claim Marriage Allowance?+
    No, higher-rate + additional-rate taxpayers cannot RECEIVE the Marriage Allowance transfer. The receiver must be a basic-rate taxpayer with income £12,571-£50,270. If your Ltd Co salary + dividend extraction puts your total income above £50,270, you fall into higher rate + lose Marriage Allowance eligibility for that year. Strategy: time extraction to stay basic-rate in years your spouse is below PA, keep the £252 annual saving + the £1,260 PA usage flexibility. Pension contributions reduce 'adjusted net income' for HICBC purposes but DON'T affect Marriage Allowance eligibility (which uses total taxable income, not adjusted).
    We got divorced last year, can we still claim Marriage Allowance for the years we were married?+
    Yes, backdating claims for previous tax years remains available even after marriage ends. If you + ex-spouse were eligible across past 4 tax years (lower earner below PA; higher earner basic-rate) but never claimed, you can still backdate-claim now. The lower earner makes the claim covering the historical years. For current-year onwards: you must be married or in a civil partnership on at least one day of the tax year being claimed for. Year of divorce is the cutoff.
    If my spouse + I are unmarried but cohabiting + have kids together, can we claim Marriage Allowance?+
    No, Marriage Allowance is restricted to married couples + civil partnerships. Cohabiting couples (even with children together + long-term relationships) do NOT qualify. The eligibility test is strictly legal marriage/civil partnership status at some point during the tax year. The policy choice has been criticised but the eligibility rule is settled. Many cohabiting couples informally consider Marriage Allowance as a benefit worth marrying for (£252/year for 30+ years = £7,500+ over a lifetime, before backdating).

    Last reviewed: