Marcus is 47, a delivery driver from Wolverhampton, and until Sunday dinner he thought his State Pension would simply sort itself out. Then his brother mentioned two missing years on his own record, found during a ten-minute check. That evening Marcus decided to check his National Insurance record online too, and there they were: two years marked “not full”, quietly shrinking his future pension. The check is free, takes about ten minutes, and this guide shows you exactly how to do it.
Your National Insurance Record at a Glance
| Official service | Check your National Insurance record on GOV.UK |
| Cost | Free |
| Time it takes | About 10 minutes online |
| What you need | A Government Gateway login, plus photo ID the first time |
| What it shows | Paid years, free credits, gap years and the cost to fill them |
| Years needed | 35 full years for the full State Pension; 10 minimum |
| Filling gaps | Usually the past 6 years only; deadline 5 April each year |
What Your National Insurance Record Actually Shows
Marcus expected a wall of jargon and got a simple list instead. The record on the official GOV.UK service shows every tax year of your working life, from 6 April to 5 April, with each one marked as full or not full. For every year you can see what you paid through wages or self-employment, any National Insurance credits you received, and, for gap years, exactly what a top-up would cost. A full year counts towards your State Pension; a “not full” year usually does not. The service sits inside the same personal tax account you use to check your tax code online, so one login covers both. Everything updates to the start of the current tax year, meaning 2025/26 is the newest year you’ll see settled.
Signing In With Government Gateway
Getting in took Marcus less time than his tea took to cool. Open the GOV.UK page, press Start now, and enter your Government Gateway user ID and password. No login yet? You can set up a Government Gateway account in about ten minutes with your National Insurance number and an email address. First-time users normally prove who they are with photo ID, usually a UK passport or a photocard driving licence, so keep one within reach. Once you’re through, the record loads on screen straight away, with nothing to print and nothing to pay. Keep your user ID somewhere safe afterwards, because the same login also opens your tax, pension and childcare services, and it will save you a recovery job later.
Why 35 Years Is the Magic Number
Counting his full years, Marcus reached 24 and understood the stakes. You normally need 35 qualifying years for the full new State Pension, worth £241.30 a week in 2026/27, and at least 10 years to receive anything at all. Each qualifying year is worth roughly one thirty-fifth of the full rate, which comes to about £358 a year for life. A year qualifies when you worked and paid National Insurance, received credits, or paid voluntary contributions. Employees build years through their payslips without thinking about it, while self-employed people add theirs through Class 2 contributions when they file Self Assessment online. Miss five years and you could lose nearly £1,800 a year in retirement, which is why the record deserves ten minutes of your attention now.
“Year Is Not Full”: Why Gaps Happen
The two gaps on Marcus’s record matched his memory: a redundancy in 2013 and six months abroad in 2018. Gaps appear for very ordinary reasons. GOV.UK lists the common ones as being employed on low earnings, being unemployed without claiming benefits, self-employment with small profits, and living or working outside the UK. Credits covering only part of a year leave a shortfall too. The trap is the middle one: people who lose work but never claim anything earn no credits for those months, while someone who did apply for Universal Credit online would have kept their record ticking over automatically. A gap year is not always a disaster, and some cost you nothing in the end, but you cannot judge that until the record shows you where they are.
Free Fixes First: National Insurance Credits
Before spending a penny, Marcus’s wife Dawn found she’d been protected for years without knowing. National Insurance credits fill gaps for free, and many arrive automatically. You get them while registered for Child Benefit for a child under 12, even if you don’t take the payments, and while receiving Universal Credit, Jobseeker’s Allowance, Employment and Support Allowance, Maternity Allowance or Carer’s Allowance. Other credits need an application: Carer’s Credit if you care for someone 20 or more hours a week, credits for Statutory Sick Pay periods, jury service, and Specified Adult Childcare credits for grandparents who mind a grandchild under 12 while the parents work. If a credit you were owed is missing from your record, contact HMRC and ask for it to be added before you consider paying anything.
The Price of a Missing Year: £18.40 a Week
Fixing a gap has a clear price tag. Voluntary Class 3 contributions cost £18.40 a week for 2026/27, or £956.80 for a full year, according to the official GOV.UK voluntary contributions pages. Since each bought year adds around £358 a year to your pension for life, the outlay typically repays itself within three years of retiring, and over £7,000 could come back across a 20-year retirement. You can usually only fill gaps from the past 6 years, with a deadline of 5 April, so in 2026/27 the oldest year you can normally buy is 2020/21. The last two years are charged at their original, often cheaper rates. Since April 2024 you can handle paying voluntary National Insurance online from start to finish, no cheques or phone queues required.
Check Before You Pay a Penny
Here Marcus nearly made an expensive mistake. GOV.UK is blunt about it: voluntary contributions do not always increase your State Pension, so paying for a gap can be money down the drain. His 2013 gap, it turned out, would add nothing, while the 2018 year was worth every pound. To find out which is which, check your State Pension forecast online first, because the forecast service now includes a step showing whether filling a specific year would actually boost your pension, and by how much. If you’re under State Pension age and want a human answer, ring the Future Pension Centre on 0800 731 0175. Anyone already at State Pension age should contact the Pension Service instead. Ten careful minutes here can save you £956.80.
The App Route and Other Ways In
Dawn did her whole check from the sofa using the free HMRC app, which shows your National Insurance record, your State Pension forecast and your National Insurance number in a few taps. Sign in once with Government Gateway and it remembers you, letting you back in with your fingerprint or face afterwards. The app even lets you save your NI number to your Apple or Google Wallet and download an official confirmation letter, handy since HMRC will not read the number out over the phone. We compared both routes in our guide to the HMRC app and the HMRC website. Prefer paper or a voice? Request a printed statement online, or call HMRC’s National Insurance enquiries line on 0300 200 3500, Monday to Friday, 8am to 6pm.
One Screen That Sorts Your Sixties
Marcus now knows exactly where he stands: 24 full years, one gap worth fixing, and a plan costing less than his monthly fuel bill. When you check your National Insurance record online, a vague worry about retirement becomes a short list of numbers you can actually act on. The service is free, official and quicker than a supermarket shop. Pick an evening this week, make a brew, sign in and count your full years. Your future self will collect the interest.
Frequently Asked Questions
How do I check my National Insurance record online?
Sign in at GOV.UK’s Check your National Insurance record service with a Government Gateway login. It’s free, and the year-by-year record appears straight away.
What does “year is not full” mean on my record?
It means that tax year doesn’t count towards your State Pension, usually because of low earnings, unemployment without benefits, small self-employed profits or time abroad.
How much does it cost to fill a gap year?
Voluntary Class 3 contributions cost £18.40 a week in 2026/27, about £956.80 for a full year, with recent years sometimes charged at cheaper original rates.
Can I check my National Insurance record on the HMRC app?
Yes. The free HMRC app shows your full record, your NI number and your State Pension forecast once you sign in with Government Gateway.
How far back can I pay missing years?
Normally 6 years, with a 5 April deadline each year. In 2026/27 the oldest gap you can usually fill is the 2020/21 tax year.
Disclaimer: This article is general information, not financial or pensions advice. Rules and figures change, so confirm your own position on the official GOV.UK service or with the Future Pension Centre before paying anything. Figures correct as of August 2026.
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