UK / PAYROLL PLANNING
UK Tax Calculator
Estimate Income Tax, National Insurance, pension contributions, and annual or monthly take-home pay with the assumptions shown on the page.
Set UK tax inputs
Update the allowance when your scenario uses a different assumption.
Annual take-home
Your UK estimate will appear here
Enter salary and the pension and allowance assumptions you want to compare.
What this UK estimate includes
The current script subtracts pension from salary, applies a simplified 20% basic and 40% higher Income Tax model after personal allowance, estimates National Insurance with 8% and 2% bands, and reports annual and monthly net pay.
Visible assumptions
Personal allowance and pension percentage are editable. The Income Tax and National Insurance bands are fixed in the script and are not selected by tax year.
Accuracy boundary
The model does not include tax codes, Scottish rates, benefits, student loans, salary sacrifice rules, or every pension and payroll detail.
Frequently Asked Questions
What does this UK tax calculator estimate?
It estimates UK Income Tax, National Insurance, pension contributions, and annual or monthly take-home pay from the salary and assumptions you enter.
Which assumptions can I change?
You can change annual salary, pension contribution percentage, and personal allowance. The simplified tax bands and National Insurance bands are fixed in the current model.
Does it include National Insurance?
Yes. The result includes a simplified National Insurance estimate alongside Income Tax and pension deductions.
Does this cover every UK region and tax year?
No. There is no tax-year or Scottish-band selector in this version. Verify the relevant year, location, tax code, benefits, and pension method before relying on a result.
Is this an official HMRC calculation?
No. It is an educational planning estimate, not an HMRC payroll calculation or tax advice.