Question: how much can you earn before you have to pay income tax?
Answer: you pay 0% on earnings up to £12,500* for 2020-21. then you pay 20% on anything you earn between £12,501 and £50,000. you'll pay 40% Income Tax on earnings between £50,001 to £150,000. if you earn £150,001 and over you pay 45% tax.