For the 2020-2021 tax year, the first $18,200 you earn is tax-free. You'll then pay 19% on earnings between $18,201 and $45,000, 32.5% on earnings between $45,001 and $120,000, and 37% on earnings between $120,001 and $180,000. Anything you earn above $180,001 is taxed at 45%.