National Insurance (NI) is a UK tax on employment earnings and self-employed profits that funds the State Pension, the NHS, and other welfare benefits. It is entirely separate from income tax — it uses different thresholds, different rates, and is assessed on a pay-period basis rather than annually. If you are an employee in the 2026/27 tax year, this guide explains exactly how much NI you pay, when it kicks in, and what it entitles you to. Understanding NI is essential because it represents a significant portion of your overall deductions and directly affects your take-home pay.[1]
How much National Insurance do I pay in 2026/27?
Most employees fall under NI Category A. Under this category, you pay nothing on the first £1,047.5 of annual earnings. Once your income exceeds that Primary Threshold, you pay 8% on every pound up to the Upper Earnings Limit of £4,189.17. Beyond £4,189.17, the rate drops to just 2%. This structure means NI is not a flat tax — it is progressive up to the UEL, then becomes regressive above it, which is why high earners pay a smaller percentage of their total income in NI than middle-income workers.
For example, on a salary of £35,000, your annual employee NI contribution would be approximately £2,716 — that is 8% of the £33,952.5 that falls between the Primary Threshold and your salary. You can see the precise monthly figure using our calculator for a £35,000 salary.
| Annual Earnings | Monthly Earnings | NI Rate |
|---|---|---|
| Up to £1,047.5 | Up to £87 | 0% |
| £1,047.5–£4,189.17 | £87–£349 | 8% |
| Over £4,189.17 | Over £349 | 2% |
What is the NI Primary Threshold?
The Primary Threshold is the point at which you start paying employee NI. For 2026/27 it is set at £1,047.5 per year, which works out to £87 per month. This is not the same as the Personal Allowance for income tax (which is £12,579). The misalignment between these two thresholds means there is a small band of earnings between £12,579 and £1,047.5 where you pay income tax but not NI, or vice versa, depending on which threshold is higher in a given year.
There is also a Lower Earnings Limit (LEL) of £533 per year. Earnings between the LEL and the Primary Threshold do not attract NI charges, but they do count as a qualifying year for State Pension purposes. This is important for people on very low salaries — they build pension entitlement without paying any NI. Company directors often set their salary at the Primary Threshold to maximise pension credits while paying zero employee NI.
What is the Upper Earnings Limit?
The Upper Earnings Limit (UEL) for 2026/27 is £4,189.17 per year (£349 per month). It is aligned with the income tax Higher Rate threshold (Personal Allowance + Basic Rate band). Earnings above the UEL are charged at just 2%, a significant drop from the 8% main rate. Unlike income tax, where the higher rate of 40% applies above this threshold, NI actually decreases — this is one of the quirks of the UK tax system that benefits higher earners disproportionately.
In practice, the UEL means someone earning £80,000 pays the same NI on the slice between £1,047.5 and £4,189.17 as someone earning £4,189.17, plus only 2% on the excess. The combined marginal rate of income tax plus NI rises from 28% (basic rate band) to 42% (above the UEL), rather than the 48% it would be if the main NI rate continued.
How is National Insurance calculated each month?
Unlike income tax, which is calculated cumulatively across the tax year, National Insurance is assessed on each individual pay period in isolation. If you are paid monthly, HMRC compares your earnings that month against the monthly Primary Threshold (£87) and the monthly UEL (£349). If one month you earn significantly more than usual — for example due to a bonus — that entire month is assessed at the higher rate with no smoothing across the year.
This pay-period approach means a one-off bonus of £10,000 in a single month can attract more NI than the same £10,000 spread evenly across 12 months. Our bonus tax calculator handles this month-specific assessment accurately, while the main calculator annualises the monthly NI calculation for regular salaries.
There is no annual reconciliation for NI like there is for income tax. If you are over-deducted NI in one month and under-deducted in another, these do not cancel out. This is a key difference from PAYE income tax, where the cumulative system adjusts each month to ensure the right total by year-end.
What are NI categories and which one am I?
Your NI category determines which rate table applies to your earnings. Most employees are Category A — the standard category. Your category letter appears on your payslip and determines both the employee and employer NI rates. Here are the most common categories:
- Category A — standard employees aged 21 to State Pension age. This is the most common category and the rates described above apply.
- Category B — married women or widows who chose to pay a reduced rate before 1977. Very few people remain on this category today.
- Category C — employees over State Pension age. No employee NI is due at all, regardless of earnings.
- Category H — apprentices under 25. The employee rate is the same as Category A, but the employer pays less on earnings up to the apprentice upper threshold.
- Category M — employees under 21. Same employee rates as A, but reduced employer NI up to the upper secondary threshold.
- Category V — veterans in their first year of civilian employment. Reduced employer NI, same employee rates as A.
Our calculator defaults to Category A. If your payslip shows a different letter, you can select it in the advanced options to see the precise deduction — though in most cases only the employer contribution differs, not the employee rate.
What does National Insurance pay for?
National Insurance contributions fund the State Pension, the NHS, contributory benefits such as Jobseeker's Allowance and Employment and Support Allowance, Statutory Maternity, Paternity, and Sick Pay, and Bereavement Support Payment. Unlike general taxation, NI creates an entitlement link — you need a certain number of qualifying years to receive the full State Pension. Currently you need 35 qualifying years for the full new State Pension and a minimum of 10 years to receive anything at all.
The link between contributions and entitlement is why NI is technically called “insurance” rather than a tax, though in practice the distinction is increasingly blurred. The NI Fund is separate from general taxation revenue, but transfers are made when the fund runs low. For most people, thinking of NI as a second income tax that also builds pension entitlement is the most accurate mental model.
Does Scottish income tax affect my NI?
No. National Insurance is a UK-wide tax administered by HMRC and is not devolved to the Scottish Parliament or any other devolved government. Whether you live in Scotland, England, Wales, or Northern Ireland, you pay exactly the same NI rates and thresholds. Scottish income tax only affects the income tax portion of your deductions — your NI bill is identical regardless of where in the UK you reside. See our Scottish income tax guide for details on what is and is not devolved.
How can I reduce my NI bill?
The most effective way to reduce employee NI is through salary sacrifice arrangements. When you sacrifice salary into a pension, the sacrificed amount is never treated as earnings for NI purposes — saving you 8% on every pound sacrificed within the main band. Unlike pension relief (which only saves income tax), salary sacrifice saves both income tax and NI. This also reduces your employer's NI bill, which is why many employers pass on some of the saving.
Other forms of salary sacrifice — such as Cycle to Work or electric vehicle schemes — also reduce your NI-able earnings. However, you cannot sacrifice below the National Minimum Wage. See our salary sacrifice guide for a detailed comparison of the tax and NI savings.
Voluntary NI contributions (Class 3) are available if you have gaps in your record. Paying to fill gaps is usually worthwhile if you are within six years of the gap and need additional qualifying years for your State Pension. Each qualifying year currently adds about £6.30 per week to your State Pension — a very strong return on a Class 3 contribution of around £17 per week.
Sources
- HMRC — National Insurance rates and categories. Accessed July 2026.