Answers · UK 2025/26

Should I pay voluntary National Insurance contributions to boost my State Pension?

Paying voluntary Class 3 National Insurance (£18.40 a week for 2026/27) to fill gaps in your record is usually worthwhile if you are short of the 35 qualifying years needed for a full State Pension and have a normal life expectancy, since each year typically pays for itself within a few years of retirement. Always check your State Pension forecast first to confirm you actually have a gap worth filling.

Last updated: 1 July 2026Last reviewed: 1 July 2026How we verify

Full answer

Whether voluntary National Insurance contributions make financial sense depends on your individual circumstances, but for most people with genuine gaps and a normal life expectancy, the maths tends to favour paying. **Step one: check you actually need to pay** Before paying anything, check your free online State Pension forecast, which shows exactly how many qualifying years you already have, how many more you need for the full new State Pension (usually 35), and specifically which past tax years show as gaps. Some people assume they have gaps when they do not (for example, years covered by Child Benefit credits, Carer's Credit, or other automatic NI credits still count as qualifying years even without direct contributions). **The basic value calculation** Each additional qualifying year typically adds around 1/35th of the full new State Pension rate to your eventual weekly pension -- at the 2026/27 rate of £241.30 a week, this is roughly £6.89 a week, or around £358 extra a year, for life. Against a cost of roughly £957 for a full year of Class 3 contributions, this means the cost is usually recovered within about 2.5-3 years of drawing the increased pension, assuming you live at least that long into retirement. **When it makes less sense** Voluntary contributions are less clearly worthwhile if: you already have (or are on track to reach) the full 35 qualifying years without paying anything extra, you have a significantly reduced life expectancy for health reasons, you are close to or past State Pension age with limited time left to benefit from the increase, or you might qualify for Pension Credit in retirement anyway (in which case a higher State Pension could, in some cases, simply reduce a means-tested top-up you would otherwise have received, partially offsetting the benefit). **Class 2 vs Class 3 -- check which applies** Some self-employed people with gaps may be able to pay the much cheaper Class 2 rate (£3.65 a week voluntary rate) rather than Class 3 (£18.40 a week) for certain gap years, if they were self-employed with profits below the small profits threshold during those years -- this is a significantly better deal if it is available to you, so check with HMRC or a pension specialist which class applies to each specific gap year before paying. **Worked example** Someone aged 45 discovers via their State Pension forecast that they have 4 gap years from time spent living abroad, and are currently on track for only 31 qualifying years. Paying Class 3 voluntary contributions for the 4 gap years costs roughly £3,828 in total. This increases their eventual State Pension by roughly 4/35ths of the full rate, worth about £1,432 extra a year for life from State Pension age -- meaning the cost is recovered within about 2.7 years of receiving the increased pension, a strong return for anyone with a typical life expectancy. **Practical tip** Contact the Future Pension Centre (a free government service) before paying anything, to get a written confirmation of exactly how much your pension would increase by filling specific gap years -- this removes any guesswork about whether the sums genuinely add up in your specific case.