What This Calculator Estimates
This calculator estimates UK National Insurance from the salary and NI rate you enter. It is intended for simple planning estimates only.
How to Use This Calculator
- Enter annual gross salary.
- Enter an estimated NI rate.
- Click Estimate National Insurance.
- Review the annual and monthly NI estimate.
- Verify official UK rules before relying on the result.
Related Calculators
Salary Calculator UK · Income Tax Calculator UK · Payroll Tax Calculator
Frequently Asked Questions
What does this UK National Insurance calculator estimate?
It estimates annual and monthly National Insurance contributions from the salary and rate you enter.
Are official UK NI thresholds built in automatically?
No. This version uses the rate you enter for a planning estimate.
Can NI class or employment type change the result?
Yes. Different classes and employment circumstances can change actual NI.
Is this official tax advice?
No. It is an estimate only and you should verify current official rules.
When should I recalculate?
Recalculate whenever salary or NI assumptions change.
This calculator provides UK National Insurance estimates only. Official thresholds, classes, and rates can change, so verify current rules before relying on the result.
Last updated: May 11, 2026