A NIC charge on your payslip is a deduction for National Insurance Contributions, the UK’s social security tax. It funds the State Pension, several statutory benefits, and the National Health Service. If you’re employed, the deduction kicks in once your earnings pass £242 per week in the 2026/27 tax year; self-employed workers pay through Self Assessment instead. What you pay in also builds a personal record that decides what you can claim later.
Why You Pay It and What You Get Back
National Insurance works differently from income tax. Rather than disappearing into general government spending, your contributions build a record against your name that unlocks specific entitlements.
The biggest of those is the State Pension. You need at least 10 qualifying years on your record to get any State Pension at all, and 35 qualifying years for the full amount.1NI Direct. Understanding and Qualifying for New State Pension A qualifying year is one in which you earned enough, or received enough credits, for that tax year to count.
Your NIC record also affects Maternity Allowance, bereavement benefits, contribution-based Jobseeker’s Allowance, and Employment and Support Allowance. Each of these requires paid or credited contributions in specific reference periods, so a gap in your record can leave you ineligible at the moment you need help.
How Much Comes Out of Your Pay
If you’re an employee, your NIC is Class 1, deducted through PAYE alongside income tax. It has two parts: primary contributions paid by you, and secondary contributions paid by your employer on top.2GOV.UK. National Insurance Classes The line on your payslip is the primary side.
How much you pay depends on where your weekly earnings sit against a set of thresholds. For 2026/27 the numbers are:3GOV.UK. Rates and Thresholds for Employers 2026 to 2027
- Lower Earnings Limit: £129 per week (£6,708 per year). Earn at least this much and the week counts toward your NIC record, even though nothing is deducted.
- Primary Threshold: £242 per week (£12,570 per year). This is where the charge begins. Below it, you pay nothing.
- Upper Earnings Limit: £967 per week (£50,270 per year). Earnings between the Primary Threshold and this limit are charged at 8 percent.
- Above the Upper Earnings Limit, the rate drops to 2 percent.
A worked example makes it concrete. If you earn £600 a week, you pay nothing on the first £242, then 8 percent on the remaining £358, which comes to about £28.64 in NIC that week.
Notice the zone between £129 and £242. Earnings there build your pension record without costing you anything, so a modest part-time job can still add qualifying years.
The Other Classes, Briefly
Class 1 covers standard employees, but the letters go further and it’s worth knowing which apply if you don’t fit that mold.
- Class 1A is paid by employers only, on taxable benefits in kind such as company cars or private medical insurance. Nothing comes off your pay for this.
- Class 2 is a flat weekly rate for the self-employed. Since April 2024 it’s no longer mandatory, but you can still pay it voluntarily at £3.50 per week for 2025/26 to protect your record if your profits are low.
- Class 3 is voluntary and open to anyone. It lets you plug gaps in your NIC record, at £17.75 per week for 2025/26 (roughly £923 for a full year).4GOV.UK. Voluntary National Insurance – Rates
- Class 4 is the main self-employed charge, calculated on annual profits. For 2025/26 it’s 6 percent on profits between £12,570 and £50,270, and 2 percent above that. Class 4 does not itself build benefit entitlements.5GOV.UK. Self-Employed National Insurance Rates
Voluntary Class 3 is the one most people end up looking into. If you spent time abroad, took a career break, or had years of low earnings, buying qualifying years can push you closer to the 35 needed for a full State Pension, and the payback once you reach pension age is usually quick.6GOV.UK. Voluntary National Insurance – Check Which National Insurance Contributions You Can Pay
You can also get qualifying years without paying, through National Insurance credits. Credits are awarded automatically while you claim Universal Credit, Jobseeker’s Allowance, Employment and Support Allowance, Carer’s Allowance, or Maternity Allowance.7GOV.UK. National Insurance Credits – Eligibility Parents registered for Child Benefit for a child under 12 get them too, even if their income is high enough that they have to repay the benefit through the High Income Child Benefit Charge. Skipping the Child Benefit registration to avoid the paperwork can quietly cost you qualifying years.
Grandparents and other family members who regularly look after a child under 12 can claim Specified Adult Childcare credits, using a qualifying year the working parent doesn’t need for themselves.8GOV.UK. Apply for Specified Adult Childcare Credits
How the Charge Reaches HMRC
As an employee, you don’t have to do anything. Your employer runs PAYE, calculates the NIC each pay period, deducts it from your gross pay along with income tax, and sends both to HMRC.9GOV.UK. PAYE and Payroll for Employers After the tax year ends, you get a P60 summarising your total pay and deductions; hold onto it as your record of what you contributed.10GOV.UK. Your P45, P60 and P11D Form – P60
If you’re self-employed, Class 2 (if you’re paying it voluntarily) and Class 4 go through Self Assessment. You report your profits on your tax return, HMRC works out what you owe, and payment is often split into two instalments on account. The filing deadline is 31 January after the tax year ends.11GOV.UK. Self Assessment Tax Returns
Every contribution, however it’s collected, is logged against your National Insurance number, the AB 12 34 56 C identifier HMRC uses to keep your record straight.12GOV.UK. Your National Insurance Number
When You Stop Paying
Employee NIC ends at State Pension age. Your employer switches your National Insurance category letter to “C” in the payroll, and the deduction drops to zero.13GOV.UK. What to Do When an Employee Reaches State Pension Age Your employer still pays their secondary contributions on your wages. Self-employed workers similarly stop owing Class 2 and Class 4 once they reach State Pension age.
State Pension age is currently 66 and is rising to 67 between 2026 and 2028. If you were born between 6 April 1960 and 5 March 1961, your pension age falls somewhere between 66 years and 1 month and 66 years and 11 months. Anyone born on or after 6 March 1961 has a State Pension age of 67.14GOV.UK. State Pension Age Timetables
If You Think You’ve Overpaid
Overpaying NIC is more common than people expect. It happens most often when someone works two jobs at the same time, because each employer applies the thresholds independently and your combined earnings can push past the annual maximum. It also happens when an employer uses the wrong National Insurance category letter.
If HMRC writes to you saying you may be due a refund, you can claim online using the reference number on the letter.15GOV.UK. Apply for a Refund of National Insurance Contributions For contributions paid in error, you have six years from the end of the tax year in which the contribution was due to apply. There is no time limit on refunds of the amount paid above the annual maximum, and HMRC can extend the six-year window where you had a reasonable excuse for the delay.16GOV.UK. National Insurance Manual – NIM37003 – Refunds – Class 1 – Time Limits for Applications