Voluntary Class 3 National Insurance 2026/27: Is £18.40 a Week Worth It?
A worked example of whether paying voluntary Class 3 National Insurance at £18.40 a week to fill a State Pension gap year pays for itself in 2026/27.
The most expensive way to fill a gap
Voluntary Class 3 National Insurance, at £18.40 a week for 2026/27, is the standard rate available to almost anyone wanting to fill a missing State Pension qualifying year — but it is roughly five times more expensive than the £3.65 a week voluntary Class 2 rate available to eligible self-employed people, making it worth checking Class 2 eligibility first before defaulting to Class 3.
National Insurance Calculator
Calculate your National Insurance contributions for 2025/26.
Open National Insurance calculatorDoing the breakeven maths
A full year filled at the Class 3 rate costs £956.80. Each qualifying year adds approximately 1/35th of the full new State Pension (£241.30 a week in 2026/27) to a person's entitlement — around £6.89 a week, or roughly £358 a year. Dividing the £956.80 cost by the £358 annual gain gives a breakeven period of a little under three years of receiving the State Pension.
State Pension Forecast Calculator
Forecast your UK State Pension based on qualifying NI years and model the impact of filling gap years with voluntary Class 3.
Open State Pension Forecast calculatorCheck the forecast before paying
Since the State Pension requires 35 qualifying years for the full amount, someone who is already on track to reach 35 years through other means — continued employment, existing credits, or other gap years already filled — gains nothing from paying voluntary Class 3 for an additional year beyond what they need. The State Pension forecast tool on gov.uk shows exactly how many qualifying years someone already has and whether filling a specific gap year would actually increase their entitlement.
Bottom line
At £18.40 a week, voluntary Class 3 National Insurance typically pays for itself within around three years of receiving the State Pension, making it a reasonable value proposition for most people with a genuine gap year and a normal life expectancy — but only after confirming, via a State Pension forecast, that filling the gap would actually increase entitlement rather than duplicate years already secured elsewhere.
Sources
- GOV.UK: Voluntary National Insurance Contributions
- GOV.UK: Check Your State Pension Forecast
- GOV.UK: The New State Pension
Frequently asked questions
How much does voluntary Class 3 National Insurance cost in 2026/27?
£18.40 a week, or £956.80 for a full year's gap, payable by anyone wanting to fill a missing qualifying year that cannot be covered by the cheaper voluntary Class 2 rate.
Who typically needs to pay Class 3 rather than Class 2?
People who were not self-employed during the gap year — for example, those who were unemployed without claiming credits, living abroad without paying UK contributions, or below the small profits threshold without opting into voluntary Class 2 — usually need the Class 3 rate to fill that specific year.
How much extra State Pension does one qualifying year add?
Each qualifying year adds roughly 1/35th of the full new State Pension. At the 2026/27 full new State Pension rate of £241.30 a week, that works out at approximately £6.89 a week extra, or about £358 a year.
How long does it take to break even on a £956.80 Class 3 payment?
At roughly £358 a year of extra State Pension, breakeven is reached in a little under three years of receiving the State Pension — meaning anyone likely to draw a State Pension for more than around three years after retirement age typically comes out ahead.
Can I only fill recent gap years, or go back further?
Normally you can only fill gaps from the past six tax years, though transitional arrangements after the 2016 State Pension reforms have at times allowed filling gaps further back — check your State Pension forecast and current filling deadlines on gov.uk before assuming a specific year is still available.
Is it ever not worth paying voluntary Class 3?
If someone already has, or is on track to reach, 35 qualifying years by State Pension age without the extra year, or has a significantly reduced life expectancy, the breakeven maths may not work in their favour — checking your own State Pension forecast first is essential before paying anything.
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Related reading
New State Pension Transitional Arrangements: Why Your Forecast Isn't a Round Number
The new State Pension started in April 2016, but everyone's 'starting amount' was calculated from their pre-2016 National Insurance record. That's why forecasts show odd figures like £198.47 instead of £241.30 — here's the COPE mechanism explained.
Gaps in Your National Insurance Record 2026/27: How to Check and Fill Them
How to check your National Insurance record for gaps and fill them with voluntary Class 3 contributions at £18.40 a week in 2026/27, with a worked example of the State Pension impact.
Specified Adult Childcare Credits 2026/27: How Grandparents Can Boost Their State Pension
Specified Adult Childcare credits let a working-age grandparent providing childcare claim the National Insurance credit that would otherwise go unused by the parent claiming Child Benefit, boosting their State Pension.