How do I know which CGT rate I'll pay?

Your CGT rate depends on your total income for the year, including the gain itself. Here's how it works: first, work out your total taxable income (salary, self-employment, rental, dividends) and subtract your Personal Allowance (£12,570 for most people). What's left is your taxable income. Any remaining space in your basic-rate band (up to £37,700 of taxable income) gets taxed at 18%. Any gain that pushes you above that threshold is taxed at 24%. For example, if your taxable income is £20,000 and you make a gain of £30,000, the first £17,700 of the gain falls in the basic-rate band at 18%, and the rest is at 24%. We calculate this precisely for every client.