When Do You Stop Paying National Insurance?
State Pension age in the UK is currently 66 for both men and women, rising to 67 under a phased timetable that began on 6 May 2026 for those born on or after 6 April 1960 [2] [3]. At that threshold, an employee's National Insurance contributions stop entirely, but the employer's secondary contribution at 15% continues on all earnings above £5,000 per year [4]. This distinction matters for payroll teams: the NI category letter changes, the deduction stops, and the employer bill does not.
The rule is straightforward for most employed workers. The complexity sits in the self-employed calculation (which runs to the end of the tax year rather than stopping on the birthday), in the employer's obligations under Category C, and in the impact, or lack of it, on the state pension record.
Key takeaways
- An employee stops paying Class 1 employee National Insurance on reaching State Pension age, currently 66 for most workers, transitioning to 67 from 6 May 2026 onwards.
- The employer continues to pay 15% secondary NI on the employee's earnings above £5,000 per year even after the employee stops contributing.
- Self-employed individuals stop paying Class 4 NI from 6 April (the start of the tax year) after reaching State Pension age, not on their birthday.
- The employee must notify the employer and provide proof of age. No deduction should be made from that point.
- Stopping NI does not increase the state pension: 35 qualifying years delivers the full amount regardless of how many additional years are contributed.
When an employed worker stops paying National Insurance
Employee Class 1 National Insurance stops on the day the worker reaches State Pension age [2]. The deduction should not appear on any payslip from that date forward. The employee is responsible for informing the employer; HMRC does not automatically notify the payroll. The standard way is to provide a birth certificate, passport or State Pension award letter as evidence of date of birth [4].
For employees who prefer not to share their birth certificate or passport directly, HMRC can issue a letter confirming State Pension age eligibility to show the employer instead. The request can be made by writing to HMRC's NI Contributions Office.
Once evidence is received, the employer updates the NI category letter in the payroll software. The NI category letter for employees at or above State Pension age is C. Under Category C, the employee's contribution is zero and the employer's contribution remains at 15% on earnings above the Secondary Threshold [5] [12]. HMRC-recognised UK payroll software applies the Category C rules automatically once the letter is updated, preventing accidental deductions from subsequent payruns.
What happens if the employer keeps deducting NI by mistake
If an employer continues to deduct employee NI after State Pension age, the worker has overpaid. The employee can reclaim the overpayment directly from HMRC rather than through the employer. The claim uses form CA8480 or can be made in writing to HMRC's NI Contributions Office, setting out the dates of the excess deduction and the amounts involved [3]. Payroll teams running small business payroll should build a date-of-birth alert into their onboarding and annual review process to catch approaching State Pension ages before a payrun.
When the self-employed stop paying National Insurance
The rule for the self-employed differs slightly from the employee rule. Class 4 NI, which is assessed on annual profits through Self Assessment, does not stop on the birthday [6]. It continues for the remainder of the tax year in which State Pension age is reached, then stops from 6 April of the following year.
Class 2 NI (now treated as paid for most self-employed individuals above the Small Profits Threshold) also ceases at State Pension age, without any further action needed [6].
| Contribution type | When it stops |
|---|---|
| Class 1 (employed) | On the birthday (State Pension age) |
| Class 4 (self-employed) | From 6 April of the following tax year |
| Class 2 (self-employed) | At State Pension age |
What the employer continues to pay under Category C
Reaching State Pension age changes nothing for the employer's secondary contribution. The employer continues to pay Class 1 secondary NI at 15% on the employee's earnings above the Secondary Threshold of £5,000 per year [4] [5]. The employer cannot reduce or waive this contribution on the grounds that the employee has passed State Pension age.
Accountants running multi-client payroll should flag Category C employees in their bureau records for annual review, since any birthday-triggered category change that is missed will result in an incorrect deduction on the employee's payslip. A payroll bureau platform built for multi-client management surfaces NI category discrepancies at the payrun stage rather than after the fact.
Does stopping NI affect the state pension?
An employee who has already accumulated 35 qualifying years of NI contributions will receive the full new State Pension regardless of any additional contributions made before reaching State Pension age [8] [9]. Contributions made after the 35-year minimum is reached do not increase the pension amount. This is why continued NI payments in later working life often add no pension value: the record is already complete.
Workers who have fewer than 35 qualifying years can still improve their pension entitlement before reaching State Pension age. A minimum of 10 qualifying years is required to receive any state pension at all [9]. Those with gaps in their record can also consider paying voluntary Class 3 contributions, which are available for the past six tax years and can fill gaps that would otherwise reduce the final pension amount [10].
NI credits, awarded for periods of unemployment, caring responsibilities or child benefit entitlement, count as qualifying years in the same way as paid contributions [7]. Workers can check their full NI record on the HMRC personal tax account to identify any gaps and assess whether they are worth filling before State Pension age [11].
How the state pension age timetable affects payroll
The phased increase from 66 to 67 means that workers born between 6 April 1960 and 5 March 1961 will each reach State Pension age at a slightly different point. For payroll teams, this means a growing number of workers over the next two years will have a State Pension age of 66 years and one or more months, not a clean 66. Payroll systems that trigger a Category C change on the worker's 66th birthday will be correct for those born before 6 April 1960, but incorrect for anyone born after that date.
The most reliable approach for any employer is to cross-reference each employee's date of birth against the DWP State Pension age calculator when setting up or reviewing NI categories for older workers. The underlying logic for this check is built into HMRC-recognised payroll software but is worth verifying manually for workers in the transition cohort. Platforms exposing payroll via an HMRC-recognised payroll API can surface the NI category and the date-of-birth field at the API level, allowing integrating systems to flag transition-cohort workers automatically.
Conclusion
The rule is simple at its core: an employed worker stops paying employee National Insurance on reaching State Pension age, the employer keeps paying, and the self-employed stop paying Class 4 from the following 6 April. The practical payroll action is equally clear: update the NI category letter to C, remove the employee deduction and confirm the employer bill remains in place.
What complicates the picture for payroll teams is the phased timetable for those born between April 1960 and March 1961, each of whom has a different State Pension age during the transition to 67. Workers with NI record gaps also need to weigh whether voluntary contributions before State Pension age make financial sense, which depends entirely on how many qualifying years they already hold.
Frequently asked questions
Do employees need to do anything to stop paying National Insurance when they reach State Pension age?
Yes. The employee must notify the employer of their date of birth and provide proof, typically a birth certificate, passport or the State Pension award letter from DWP. HMRC does not automatically notify employers when a worker reaches State Pension age, so the responsibility rests with the individual. Once proof is received, the employer updates the NI category letter from A to C in the payroll software and stops making employee deductions from the next pay period.
Does the employer stop paying National Insurance when an employee reaches State Pension age?
No. The employer continues to pay secondary Class 1 National Insurance at 15% on the employee's earnings above the Secondary Threshold (£5,000 per year in the 2026-27 tax year), regardless of the employee's age. Only the employee's contribution stops. The NI category letter changes to C, which sets the employee contribution to zero while leaving the employer contribution unchanged.
Does paying National Insurance for more than 35 years increase the state pension?
No. The full new State Pension requires 35 qualifying years. Any contributions made after the 35th qualifying year do not increase the pension amount. Workers who already have 35 qualifying years will receive the full pension from State Pension age regardless of how long they continue to work and pay NI. Workers with fewer than 35 qualifying years may be able to increase their pension by continuing to contribute or by paying voluntary Class 3 contributions for past tax years with gaps.
When does a self-employed person stop paying National Insurance?
A self-employed individual stops paying Class 4 National Insurance from 6 April of the tax year that begins after the year in which they reach State Pension age. This means contributions continue for the remainder of the tax year of the birthday, then cease entirely from the following 6 April. Class 2 contributions, which are treated as paid for most self-employed workers, stop at State Pension age. Both classes are reported through Self Assessment rather than payroll.
