Sign up to FREE email alerts from our Money Saving Club Newsletter Money Saving Expert Martin Lewis has issued an urgent message to millions of married couples in the UK.
Writing in his weekly newsletter on MoneySavingExpert, he explained how couples who have been married for four years or more only have a few days left to apply for Marriage Tax Allowance - a little-known perk from HMRC.
The allows a person to share their personal tax-free allowance with their partner every year - and it can be backdated up to four years.
Through it, a spouse with an income of £12,500 or less can transfer 10% - up to £1,250 - of their allowance to their husband, wife or civil partner - if their income is higher. "This can be backdated up to four years -
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