National Insurance Calculator 2025/26
Calculate your National Insurance contributions for 2025/26. Works for employees (Class 1), self-employed (Class 2 and Class 4), and shows your employer’s NI cost — plus how much salary sacrifice into a pension saves on NI.
National Insurance rates 2025/26
National Insurance is calculated on earnings above certain thresholds. For 2025/26 the key Class 1 rates and thresholds are:
| Band | Annual earnings | Employee rate | Employer rate |
|---|---|---|---|
| Below Lower Earnings Limit | Up to £6,396 | 0% | 0% |
| Lower Earnings Limit to Primary Threshold | £6,396 – £12,570 | 0% (NI credit only) | 0% |
| Primary Threshold to Upper Earnings Limit | £12,570 – £50,270 | 8% | 13.8% |
| Above Upper Earnings Limit | Over £50,270 | 2% | 13.8% |
Primary Threshold: £12,570/yr (£1,047.50/mo) · Upper Earnings Limit: £50,270/yr (£4,189/mo) · Secondary Threshold (employer): £9,100/yr (£758/mo)
Class 2 and Class 4 NI for the self-employed
Self-employed individuals pay two classes of NI: Class 2 is a flat rate of £3.45 per week (£179.40/year) if profits exceed the Small Profits Threshold of £12,570. Class 4 is charged on profits at 9% between £12,570 and £50,270, and 2% above £50,270.
Note: Class 2 NI was originally abolished in 2024 but reinstated for state pension credit purposes. For 2025/26, self-employed people with profits over £12,570 pay Class 2 voluntarily or mandatorily via Self Assessment.
How salary sacrifice saves NI
When you pay into a pension via salary sacrifice, your employer reduces your contractual salary and pays the equivalent directly into your pension. Because your reported salary is lower, both you and your employer pay less NI. This is different from a standard pension contribution, where you still pay NI on the full salary.
On a £40,000 salary with £2,000 of salary sacrifice, the employee saves £160 in NI (8% of £2,000) and the employer saves £276 (13.8% of £2,000). Some employers pass on their NI saving to employees, effectively boosting the pension contribution for free.