How much tax will I pay on a £10,000 bonus?
It depends on your salary, because the bonus is taxed at the top of your income. In the UK you keep £7,200 of a £10,000 bonus on a £30,000 salary, £5,800 on £80,000 and just £3,800 on £110,000, where the whole bonus lands in the Personal Allowance taper. The tables on this page show more salaries for the UK and Ireland.