Money saving expert Martin Lewis has helped millions of people use their cash wisely over the last decade.
And he's back with yet another tip in a bid to potentially save every employee in the UK thousands of pounds.
Speaking on Good Morning Britain today, the money guru issued some urgent advice about your tax code.
It may just seem like a random set of digits, but according to Martin Lewis, they might just be costing you a chunk of cash, as the Liverpool Echo reports.
He said that millions of codes written on either your payslips, P45s, P60s and coding notices are wrong and could cost you big.
Martin Lewis reveals the one bit of money advice that applies to EVERYONE
Martin said that with the new tax year starting last Saturday (April 6) everyone will have received a new tax code, which effects your take-home pay, so if it is wrong it can lead to a nasty surprise.
However, it is your responsibility to check if the tax code is right - not your employers.
The basic code is 1250L – which when you add an extra zero on the end shows the amount you can earn before paying tax (£12,500).
But if you’ve changed jobs, have more than one job, get employee benefits or are receiving more than one pension, you may have the wrong tax code.
The best way to check is by using a free online calculator.
