2026/27 National Insurance guide

How does National Insurance work with two jobs?

Unlike Income Tax, employee National Insurance is normally worked out separately for each employment. That difference can materially change your combined take-home pay.

Updated for the 2026/27 UK tax year

Separate calculationsEach employer normally applies NI thresholds to the pay from that employment.

8% main rateStandard category A employee NI is 8% in the main band for 2026/27.

2% upper rateThe standard employee rate falls to 2% above the Upper Earnings Limit.

Why two jobs are different from one combined salary

Income Tax follows your overall taxable income, but Class 1 employee National Insurance normally follows each employment separately. Each employer runs payroll using the earnings in that job and the relevant pay-period thresholds.

Can two jobs mean less National Insurance?

Yes, in some earnings splits. If part of your pay in each job sits below an NI threshold, the combined NI can be lower than if the same gross income were paid by one employer. Other splits can produce a different result. This is why simply combining both salaries before calculating NI can be misleading.

2026/27 employee NI rates

For most standard category A employees, the employee rate is 8% between the Primary Threshold and Upper Earnings Limit, then 2% above the Upper Earnings Limit. Exact payroll calculations use pay-period thresholds and rounding.

See the split-job effect

The NetSlip Two Jobs Calculator calculates NI for each employment separately and compares the result with the NI that would arise if the same earnings were treated as one job.

Related NetSlip tools & guides

Two Jobs Tax Calculator →Second Job Tax →Second Job Tax Codes →NI With Two Jobs →Student Loans With Two Jobs →Salary Sacrifice & Student Loans →£100k Tax Trap →Adjusted Net Income →

FAQs

Is National Insurance based on combined income from two jobs?

Usually not for ordinary unrelated employments. Each employer normally calculates Class 1 employee NI separately.

Can I pay no NI on a second job?

Potentially, if earnings from that employment are below the relevant NI threshold for the pay period.

Do Income Tax and NI treat two jobs the same way?

No. Income Tax ultimately reflects combined taxable income, while employee NI is normally assessed separately by employment.