# Topping up National Insurance gaps for the State Pension

Content updated: 2026-05-26

Canonical HTML: https://moneyguide.org.uk/pensions/ni-gap-top-ups/

## In short

Voluntary National Insurance contributions can fill gaps in a NI record and increase the new State Pension. Until 5 April 2025, men born after 5 April 1951 and women born after 5 April 1953 could fill gaps back to April 2006; after that date the standard 6-year rolling window applies. Check the cost and benefit of the specific year in your NI record; not every gap increases the eventual pension.

You normally need at least 10 qualifying National Insurance years for any new State Pension. The 35-year rule for the full amount applies if your NI record started after April 2016; earlier records use transitional rules, including any contracted-out history. Check your personal forecast. Check your State Pension forecast and NI record before paying voluntary contributions. A gap does not always reduce your pension, and filling it may not increase it. Check available NI credits first; use the official service or ask the Future Pension Centre which years would help.

## Class 3 cost and value

The full new State Pension is £241.30 a week in 2026/27 (£12,547.60 over 52 weeks). Your actual amount depends on your National Insurance record. You normally need at least 10 qualifying National Insurance years for any new State Pension. The 35-year rule for the full amount applies if your NI record started after April 2016; earlier records use transitional rules, including any contracted-out history. Check your personal forecast.

There is no guaranteed payback period. Compare the confirmed annual pension increase after any tax with the payment required, and consider how many years you expect to receive it.


## Self-employed: Class 2 NICs

Some self-employed people with small profits can choose voluntary Class 2 contributions. Eligibility and the rate for the year matter; use HMRC’s current guidance rather than assuming everyone with a gap can pay the cheaper class.


## Process

- Step 1 — get a State Pension forecast at gov.uk/check-state-pension and note any 'gaps' in NI years
- Step 2 — check which gaps would actually increase the forecast; 35 years is not a universal cutoff.
- Step 3 — call the Future Pension Centre on 0800 731 0175 to confirm and get an 18-digit reference for payment
- Step 4 — pay HMRC by bank transfer using the reference; the year is then added to the NI record

## Is the 5 April 2025 deadline still relevant?

No — the extended window to top up years back to April 2006 closed on 5 April 2025. From 6 April 2025 the standard 6-year rule applies: only the most recent six tax years can normally be paid for, although exceptions exist (e.g. for contracting-out reconciliation cases).

## Should everyone top up?

No. Check your State Pension forecast and NI record before paying voluntary contributions. A gap does not always reduce your pension, and filling it may not increase it. Check available NI credits first; use the official service or ask the Future Pension Centre which years would help.

## What if I lived abroad?

There are separate rules for periods abroad, including changes from 6 April 2026. Check HMRC’s current overseas voluntary-contribution rules and contact the International Pension Centre for pension entitlement questions; do not assume that Class 2 remains available for a period abroad.

## Sources

- [GOV.UK — Voluntary National Insurance contributions](https://www.gov.uk/voluntary-national-insurance-contributions)
- [GOV.UK — Check your State Pension forecast](https://www.gov.uk/check-state-pension)
- [HMRC — Rates and allowances: National Insurance contributions](https://www.gov.uk/government/publications/rates-and-allowances-national-insurance-contributions)

Information only — not regulated financial advice.