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What changes for tax when I get married?

Marriage Allowance is worth up to £252 a year and backdates four years. Transfers between spouses also become tax free, which changes capital gains and inheritance planning.

What changes for you

  1. Marriage Allowance becomes available

    If one of you earns under the personal allowance and the other is a basic-rate taxpayer, 10% of the allowance can be transferred. Up to £252 a year, and the claim backdates four tax years.

  2. Transfers between you are tax free

    Assets move between spouses on a no gain, no loss basis. That gives the couple two capital gains exempt amounts and two basic-rate bands to use, which is often worth far more than the Marriage Allowance.

  3. Inheritance tax changes entirely

    Transfers between spouses are exempt, and any unused nil-rate band passes to the survivor. A married couple can pass on twice as much before inheritance tax as two single people.

  4. The Child Benefit charge becomes a household test

    The charge is based on the higher earner of a couple, and moving in together is what makes it apply. It is one of the very few household tests in income tax.

The decisions this opens up

Each works on your own figures and shows every option with the workings. Free, and no sign-up.

Dates this puts in your diary

  • Any timeClaim Marriage Allowance — it applies to the whole tax year
  • 5 April, four years afterBackdate earlier years before they fall out of time

Run the numbers

Software that files it for you

Partner links

If you keep your own books, these are the packages that handle Self Assessment and Making Tax Digital.

FreeAgent

4.8
Free optionMTD ready

The freelancer and contractor favourite, free with some bank accounts.

  • Free forever with a NatWest, Royal Bank of Scotland, Ulster or Mettle business account
  • Built-in Self Assessment and MTD for Income Tax filing

From £0 with a NatWest, RBS or Mettle account, otherwise about £19/mo

See FreeAgent

QuickBooks

4.6
MTD ready

The big all-rounder with the deepest MTD track record.

  • Sole Trader plan built specifically for Self Assessment and MTD
  • Snap and store receipts, automatic bank feeds

From about £10/mo, frequent 90% off intro offers

See QuickBooks

Xero

4.5
MTD ready

The scale-up choice once you have staff, stock or VAT.

  • Huge app marketplace and the accountant industry standard
  • Strong for VAT, payroll and multi-user limited companies

From about £15/mo

See Xero

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