Two HMRC rules can boost the Personal Tax-Free Allowance to a whopping £21,330 for UK households. The Marriage Allowance and the Rent-a-Room scheme, administered by the Labour Party government's tax department, can significantly increase people's take-home income.
Rent-a-Room Scheme
The Rent-a-Room scheme allows you to earn up to £7,500 with no tax on the earnings. On top of the standard £12,570 Personal Tax-Free Allowance, this adds another £7,500, bringing the total to £20,070. If you earn less than your threshold, the scheme is automatic and you do not need to do anything. If you earn more, you must complete a tax return and opt into the scheme to claim your tax-free allowance. Alternatively, you can choose not to opt in and instead record your income and expenses on the property pages of your tax return.
Marriage Allowance
Marriage Allowance lets you transfer £1,260 of your tax-free Personal Allowance to your husband, wife, or civil partner. To qualify, the lower earner must have an income below their Personal Allowance, while the higher earner must pay tax at the basic rate. This cuts the couple's tax bill by up to £252 a year and can be backdated for up to four previous tax years. Even if your partner has since died, you may still be able to claim.
HSBC UK provides an example: "Tom works part-time as a caretaker at a local school and earns £10,000 a year. This is below the standard personal allowance of £12,570, so he doesn't pay any income tax. His wife Susie has a full-time job as a graphic designer on an annual salary of £25,000. That's more than the £12,570 personal allowance, but lower than the £50,270 threshold for the 40% higher rate. So, she pays income tax at the basic rate of 20%. Tom can transfer £1,260 of his ‘unused’ tax-free allowance to Susie, so her personal allowance goes up to £13,830. As a result, an extra £1,260 of what she earns is now tax-free, which means she pays £252 less in tax."
Combining both schemes, a household could effectively enjoy a total tax-free allowance of £21,330: £12,570 standard allowance plus £7,500 from Rent-a-Room plus £1,260 transferred via Marriage Allowance. This can make a substantial difference to household finances.
