HMRC are encouraging married couples and couples in a civil partnership to sign up for Marriage Allowance worth up to £238 this year.
What Marriage Allowance does is lets you transfer some of your Personal Allowance to your husband, wife or civil partner if they earn more than you, reducing their tax outgoings.
Currently the department estimates that there are around 700,000 couples eligible for the free tax break who have not applied.
You can also backdate your claim for up to four years - the amounts which can be claimed for previous years are 2015/16 - £212, 2016/17 - £220, 2017/18 - £230 and this year £238. A nice amount for any couple looking to make some savings.
If you would like to find out more visit www.gov.uk/marriageallowance or call 0300 200 33000 for more information.