Here’s some actual financial guidance (as opposed to advice: ie, you can’t sue me it it’s wrong, I refer you to our regulator). If you’re married and one of you is a non-taxpayer, the latter can pass some of their tax allowance to the taxpayer. This is often the case with retired couples and maternity leave Mums (or Dads, sorry). My clients read about this in Saga Magazine (I could, but I don’t, yet) and we agreed it was worth a ‘phone call to HMRC; They had a rebate of £460 within a few days and, lesson learned, I’ll be telling the tale to all to whom it’s relevant.