Research · 2026-05-20
Class 3 Voluntary NI Contributions, Cost per Qualifying Year
Live comparison: cost of buying one extra qualifying NI year via Class 3 voluntary contributions, against the 1/35th additional State Pension income that year unlocks. Year-by-year break-even analysis, recalculated from the current DWP and HMRC rates.
Research period:
Anyone with gaps in their UK National Insurance record can usually fill them by paying voluntary contributions: Class 2 (cheaper, only available to those who were self-employed in the missing year) or Class 3 (universal, more expensive). Every voluntary qualifying year adds 1/35th of the full New State Pension to your future entitlement. According to DWP and HMRC, PlainPension sources the Class 2 / Class 3 weekly rates and the full New State Pension weekly and annual amounts directly from their published rate tables, and computes the year-by-year break-even from the current figures.
How the break-even is calculated
The PlainPension database covers 2 tax years from 2025/26 through 2026/27. Each row below is a live computation: (weekly Class 3 rate × 52) compared against (full New State Pension annual ÷ 35), the same two-step method for every year, no hardcoded break-even figures. See the methodology page for the full rate-sourcing chain.
For the latest tax year (2026/27), buying one Class 3 voluntary year costs £962.00 and adds approximately £358.50 per year of full New State Pension in retirement. The pure break-even is 2.68 years of pension receipt, and the pension is then indexed by the triple lock for life. Class 2 voluntary contributions for the same year cost just £187.20 with break-even of 0.52 years - always the preferred route when eligible.
Calculate your own cost
Enter how many qualifying years you're missing, using the 2026/27 rates above.
Calculated on your device from the 2026/27 rates shown above - nothing you enter is sent anywhere. This assumes the year(s) you buy will genuinely add to your qualifying total; confirm on your State Pension forecast first.
Class 3 annual cost (£) by tax year, derived from weekly rate × 52
One extra qualifying year, additional State Pension (£/year) it unlocks
Break-even table
| Tax year | Class 3 annual cost | Class 2 annual cost | 1/35th of full SP (annual) | Class 3 break-even (years) | Class 2 break-even (years) |
|---|---|---|---|---|---|
| 2025/26 | £923.00 | £179.40 | £342.09 | 2.7 | 0.52 |
| 2026/27 | £962.00 | £187.20 | £358.50 | 2.68 | 0.52 |
Who can't pay voluntary contributions
The break-even numbers above only apply if you're actually allowed to buy the year. According to HMRC, you cannot pay voluntary contributions for a tax year if:
- Your record already has no gap for that year (unless you're receiving Class 3 credits and are separately eligible to pay Class 2 instead).
- You're a married woman or widow who elected to pay the reduced-rate National Insurance available to some women before 1977.
- The payment deadline for that specific tax year has already passed - normally the last 6 tax years, per the deadline note above.
Self-employed people with specific jobs
Class 2 eligibility also extends to a few self-employed categories HMRC doesn't credit automatically, so check if you fall into one before assuming only Class 3 is available: examiners, moderators, invigilators and exam question-setters; landlords who meet the specific Class 2 criteria; ministers of religion without a salary or stipend; and investment managers working independently without fees or commissions. Confirm your own category directly on the HMRC voluntary contributions guidance, since eligibility rules are personal and change with your work history.
Important caveats
The break-even arithmetic above assumes the voluntary year actually increases your State Pension entitlement. It does so only when you would otherwise have fewer than 35 qualifying years at State Pension Age. If your record will already reach 35 years by SPA, paying voluntary contributions adds nothing. Before paying, log in to the gov.uk State Pension forecast service to see exactly which years are missing and what your forecast looks like with and without voluntary top-ups.
Class 2 voluntary contributions are only available for tax years in which you were self-employed (or treated as such by HMRC for NI purposes). Where Class 2 is available, it is essentially always the preferred route, at the prevailing Class 2 rate, the cost of a qualifying year is roughly one-fifth of the Class 3 cost. The Class 2 voluntary rate has remained low for years even as Class 3 has uprated each Spring.
For the sourcing and refresh schedule, see the methodology. For full qualification rules, including how contracted-out history affects the headline rate, see UK State Pension Qualification Rules.
Put this break-even to work
The per-year cost above is only half the decision - the other half is what a bought-back year is worth inside your full retirement picture:
- See how a bought-back year changes your full projected State Pension, workplace pot, and SIPP total, not just the break-even math in isolation. Open the full pension calculator
- See how the full New State Pension rate this break-even is measured against has changed year by year under the triple lock. See the rate history
- Confirm how many qualifying years you actually need, and how contracted-out history affects your starting amount, before assuming a gap year is worth filling. Read the qualification guide
This is general information about the published rates, not a recommendation to buy any specific year. Confirm your own gap years and entitlement on your official gov.uk State Pension forecast first.