Martin Lewis is warning employees with an ‘X’ on their payslips to double check they're on the correct tax code.
Appearing on his ITV Money Show Live, the finance guru answered a question from viewer Tina, who said she had been overtaxed and wanted to know if she was entitled to a tax rebate.
Tina said: “I’m on a 16 hour contract, and last month, I did lots of overtime. I was put on the basic rate temporarily and overtaxed by more than £800.
