Married couples and those in civil partnerships could receive a minimum of over £200, and a maximum of over £1,200 by signing up for Marriage Allowance. HM Revenue and Customs (HMRC) states that Marriage Allowance allows couples to 'share their personal tax allowances if one partner earns below the Personal Allowance threshold of £12,570, and the other is a basic rate taxpayer'.
Marriage Allowance is free to apply for. More than two million couples currently claim the Allowance, but thousands more could be eligible to claim.
Couples who have been together a long time can still apply, and can backdate their claims for up to four years. If a spouse or civil partner has died since 5 April 2018, the surviving person can still claim by contacting the Income Tax helpline.