Most people in the UK have a standard tax code, like 1257L, which means you can earn £12,570 without paying tax (as of the 2024/25 tax year). However, your tax code may change if you earn money from other sources, receive certain benefits, or change jobs during the year. Knowing what your code means—and if it’s cumulative or non-cumulative—is important to avoid surprises from HMRC. https://clarkwell.co.uk/cumulative-vs-non-cumulative-tax-codes-uk/