Receiving a work bonus is exciting, but the amount that actually lands in your bank account is often significantly less than the headline figure, since bonuses are taxed just like regular income, often at your highest marginal rate. This bonus calculator shows your real take-home bonus after tax, National Insurance, and pension contributions (UK), or federal tax, FICA, and state tax (US). For UK users, it calculates the bonus as additional income on top of your existing salary, applying the correct marginal tax and NI rates that HMRC would apply through PAYE. For US users, choose between the flat 22% supplemental withholding rate most employers use by default, or the aggregate method which taxes your bonus at your true marginal rate alongside your regular salary. Use this calculator to understand what to expect before your bonus hits your account, or to negotiate a gross bonus amount that nets you a specific take-home figure.