What does the bonus tax calculator do?
It routes a specific salary question into PayBreakdown's calculator so gross pay, take-home pay, tax, National Insurance, pension, student loan, region, and tax-code assumptions can be adjusted.
PayBreakdown - Salary Calculator & Budget Manager
Bonus tax calculator
Estimate how a bonus may affect UK income tax, National Insurance, student loan repayments, and take-home pay.
What this page helps with
Bonus searches are strong long-tail intent because one-off pay can make deductions look surprising. This page points users into the salary setup where bonus income can be included alongside normal salary.
Official sources
Income Tax rates and Personal AllowancesNational Insurance rates and categoriesStudent loan repayment thresholdsPension tax reliefNational Minimum Wage and National Living Wage ratesStatutory Maternity Pay and LeaveStatutory Sick PayFCA guidance on misleading financial promotionsOff-payroll working and IR35 guidanceUnderstanding off-payroll workingSalary sacrifice for employersNHS Employers pay scales 2026/27NHS Health Careers Agenda for Change pay ratesFrequently asked questions
Can I change the assumptions?
Yes. Open the calculator from this page to change salary, hours, pension, student loan, tax year, region, tax code, bonus, and other pay settings.
Last updated 2026-05-07. Planning estimates only. Not financial advice.