What is the marriage tax allowance uk 2026 and how does it save tax?

Marriage Allowance allows a spouse or civil partner who earns less than the Personal Allowance (£12,570) to transfer £1,260 of their personal allowance to their higher-earning partner. This reduces the higher earner's taxable income by £1,260, saving them up to £252 in tax each year.

How can I transfer personal allowance spouse to reduce our joint tax bill?

To transfer the allowance, the lower-earning partner must apply online via HMRC's portal. Once approved, HMRC will adjust the tax codes for both partners. The lower earner's code will end with the letter N, and the higher earner's code will end with the letter M, adjusting their monthly pay packet automatically.

What are the marriage allowance eligibility requirements for couples?

To claim, you must be married or in a civil partnership. One partner must earn less than £12,570, and the other partner must be a basic-rate taxpayer (earning between £12,571 and £50,270). You cannot claim if either partner is a higher-rate (40%) or additional-rate (45%) taxpayer, or if you are living together but not married.

Can I claim marriage tax allowance online and backdate my claim?

Yes. You can apply online through your HMRC Personal Tax Account. You can also backdate your claim to include any tax year since 6 April 2022, provided you met the eligibility requirements in those years. Backdated claims are paid as a lump sum refund by cheque or bank transfer.

Does Marriage Allowance apply if one partner is self-employed?

Yes. You can claim if one or both of you are self-employed. The allowance transfer is processed when the self-employed partner submits their annual Self Assessment tax return, which reduces their final tax bill.

What happens to the Marriage Allowance if one partner dies?

If your partner dies after you have set up the Marriage Allowance, the allowance will continue until the end of the tax year. If the recipient partner dies, the estate will keep the benefit of the transferred allowance, and the tax code will revert back at the start of the next tax year.

Is Marriage Allowance different from the Married Couple's Allowance?

Yes. Married Couple's Allowance is a separate, older tax relief available only if at least one partner was born before 6 April 1935. Marriage Allowance is the standard scheme open to all qualifying married couples and civil partners regardless of age.

Can I cancel my Marriage Allowance if our incomes change?

Yes. You can log into your online tax account or call HMRC to cancel the transfer. If you cancel, the transfer will stop at the end of the current tax year. If you separate or divorce, you should cancel the allowance as soon as possible to prevent incorrect tax deductions.

Marriage Allowance Calculator UK (2026/27) – Claim £252 to £1,258 Tax Relief

Marriage Allowance Calculator

✓ Verified for 2026/27

Couple Incomes & Settings

Partner A (Lower Earner) Annual Income

Must earn under £12,570 to transfer £1,260 of Personal Allowance.

Partner B (Higher Earner) Annual Income

Must be a basic-rate taxpayer (£12,571 to £50,270 in England/Wales/NI).

Tax Region

Backdate Previous Years (HMRC 4-Year Rule) Max £1,258

Select eligible prior years you were married and met criteria to calculate your total cash refund cheque:

2026/27 (£252) 2025/26 (£252) 2024/25 (£252) 2023/24 (£252) 2022/23 (£250)

2026/27 Tax Saving

£252.00

£21.00 / month off Partner B tax

Total HMRC Refund

£1,258.00

Lump-sum bank transfer + PAYE

Transferred Allowance

£1,260

10% of Personal Allowance

Eligibility Status

100% Eligible

Meets all statutory rules

Partner A (Transferor) Code: 1131N

Standard Allowance £12,570

Allowance Transferred -£1,260

New Personal Allowance £11,310

Partner B (Recipient) Code: 1383M

Standard Allowance £12,570

Allowance Received +£1,260

New Personal Allowance £13,830

Calculation & Claim Summary

Partner A transfers £1,260 of their tax-free allowance to Partner B. This increases Partner B's Personal Allowance to £13,830, saving exactly 20% on the transferred slice (£252.00/year).

🛡️

Verified for Accuracy (2026/27 Tax Year)

Fact-checked and audited by David Vance, CTA FCA, Chartered Tax Advisor & Accountant. Verified against official HMRC rules.

How We Calculated This

Confirm Eligibility Conditions: Verify that both partners meet the eligibility criteria. One partner must be a non-taxpayer (earning less than the Personal Allowance of £12,570 for 2026/27). The other partner must be a basic-rate taxpayer (earning between £12,571 and £50,270 in England, Wales, or Northern Ireland). Neither partner can be a higher-rate or additional-rate taxpayer.
Transfer Personal Allowance Portion: Under the rules, the non-taxpaying partner can transfer exactly 10% of their standard Personal Allowance to their spouse or civil partner. For the 2026/27 tax year, this transfer personal allowance spouse amount is set at £1,260 (rounded to the nearest £10 from 10% of £12,570).
Reduce Low Earner's Allowance: Subtract the transferred £1,260 from the low-earning partner's Personal Allowance. Their tax-free threshold is reduced to £11,310 (£12,570 - £1,260). If the low earner's actual income is below £11,310, they pay no tax, making the transfer highly efficient.
Increase High Earner's Allowance: Add the transferred £1,260 to the basic-rate taxpayer's Personal Allowance, raising their tax-free threshold to £13,830 (£12,570 + £1,260). This means they can earn an extra £1,260 before they begin paying basic-rate income tax at 20%.
Calculate the Marriage Tax Allowance Savings: Compute the tax savings for the couple. The basic-rate taxpayer pays 20% tax on the extra £1,260 of tax-free income, which creates a tax saving of exactly £252.00 (£1,260 * 0.20) for the tax year.
Submit the Claim Online: Claim the allowance. To secure the savings, the couple must claim marriage tax allowance online through the HMRC portal or by contacting HMRC. Once processed, HMRC updates the tax codes (appending suffix M to the recipient and suffix N to the transferor), applying the savings through payroll or Self Assessment.

Real-World Examples

Detailed Math for Partner A earning £8,500 and Partner B earning £35,000

This scenario details the calculations for a married couple in England where Partner A works part-time and Partner B has a full-time salary, demonstrating the standard Marriage Allowance savings.

Step 1: Verify Eligibility:
        Partner A (Low earner) = £8,500.00 (Non-taxpayer, below £12,570)
        Partner B (High earner) = £35,000.00 (Basic-rate taxpayer, between £12,571 and £50,270)
Step 2: Transfer 10% of Personal Allowance:
        Transfer Amount = £1,260.00
Step 3: Adjust Partner A's Personal Allowance:
        New Allowance = £12,570.00 - £1,260.00 = £11,310.00
        (Partner A still pays £0 tax because their income of £8,500 is below the new £11,310 allowance.)
Step 4: Adjust Partner B's Personal Allowance:
        New Allowance = £12,570.00 + £1,260.00 = £13,830.00
Step 5: Calculate Partner B's Tax Savings:
        Old Taxable Income = £35,000.00 - £12,570.00 = £22,430.00
        New Taxable Income = £35,000.00 - £13,830.00 = £21,170.00
        Reduction in Taxable Income = £1,260.00
        Tax Savings = £1,260.00 * 20% = £252.00 per year

Detailed Math for Backdating a Claim for Three Previous Tax Years

This scenario demonstrates the calculations for a couple who backdate their Marriage Allowance claim to cover the previous three tax years in addition to the current year.

Step 1: Current Year (2026/27) Savings = £252.00 (Allowance transferred: £1,260 at 20%)
Step 2: Year 1 Backdate (2025/26) Savings = £252.00 (Allowance transferred: £1,260 at 20%)
Step 3: Year 2 Backdate (2024/25) Savings = £252.00 (Allowance transferred: £1,250 at 20%)
Step 4: Year 3 Backdate (2023/24) Savings = £252.00 (Allowance transferred: £1,260 at 20%)
Step 5: Sum Total Refund:
        Total Cumulative Savings = £252.00 * 4 years = £1,008.00
        (HMRC will issue a bank transfer or cheque for the backdated years, and apply the current year savings through your monthly PAYE tax code.)

Related Calculators

Frequently Asked Questions

What is Marriage Allowance and how does it work?

Marriage Allowance lets you transfer £1,260 of your Personal Allowance to your husband, wife, or civil partner. This reduces their taxable income by £1,260, saving them up to £252 in tax per year.

Who is eligible to claim Marriage Allowance?

You qualify if you are married or in a civil partner status, one partner has income below the personal allowance (£12,570), and the other partner is a basic rate taxpayer (earning between £12,571 and £50,270).