Buying three NI gap years at age 62: a worked example
A top-up can look attractive on paper, but the decision depends on whether each specific year actually increases your official State Pension forecast.
Written and source-checked by Muhammad Asif, ACA Affiliate (ICAEW) · Source and wording review: 28 October 2026
Short answer
In this worked example, three full Class 3 years at £956.80 each cost £2,870.40 and could add about £20.68 a week if every year counts in full. That is about £860 a year after 20% tax, which repays the cost in about 3.3 years after the pension starts. The result only holds if each year raises your official forecast.
The example assumptions
Age 62, with three full missing years confirmed as payable.
Each year costs £956.80, using the illustrative 2026/27 Class 3 rate of £18.40 for 52 weeks.
Each purchased year produces the simplified one-thirty-fifth increase and there is enough forecast headroom for all three years.
The person pays 20% income tax on the added pension and starts receiving it at State Pension age.
These assumptions are deliberately simple. An actual gap can cost less, and a purchased year can add less—or nothing—because of transitional rules, contracted-out history, future qualifying years or an existing full forecast.
Illustrative result
Total purchase cost
£2,870.40
Estimated weekly uplift
£20.68
Estimated annual uplift before tax
£1,075.51
Estimated annual uplift after 20% tax
£860.41
Estimated break-even after pension starts
About 3.3 years
The calculation is £2,870.40 divided by £860.41. It measures payback from the date pension income begins, not from the date the contributions are paid.
What could change the answer
Do not treat the worked result as a recommendation. Before paying, check whether all three years improve the official forecast, whether future contributions may fill the headroom anyway, the exact price HMRC quotes for each year, and how tax or means-tested benefits affect the net value.
Run your own scenario
Use the NI gap calculator with the figures from your official record. Then confirm the exact years with the relevant government pension service or HMRC before making payment.
Buying three years is not automatically three times the value of buying one. If only one and a half normal increments fit below the full-rate ceiling, the last useful modelled year is partial and a further year adds nothing. Price, useful uplift and the number of gaps are different inputs.
For a fictional baseline of £238.30 a week and three available gaps, the model has £3 of weekly headroom. It models one purchase at the entered price, producing £156 a year before tax. It does not charge for all three gaps when the model gives the other two no uplift. This is an illustration of headroom, not confirmation of which real tax year to buy.
Age 62 does not establish pension age
The age field is context, not an eligibility calculation. Obtain your own State Pension age from the official service. Recovery starts when pension payments begin; years spent waiting between purchase and receipt do not count as recovery years in this model.
Before committing, compare no further contributions with realistic expected future years. Keep the same earned-to-date amount in both scenarios. Confirm the specific years with the relevant pension service and retain the quoted prices.
Who to ask: HMRC for your NI record, the price of a gap and payment references; the Future Pension Centre (below State Pension age) or the Pension Service (at State Pension age) for whether a payment would increase your pension. See who to contact about NI and State Pension. Do not send us your NI number, login, bank details or pension records.