The State Pension you receive depends on the number of qualifying years on your National Insurance record, and gaps can usually be spotted, and sometimes filled, if you look in time. This guide explains how gaps arise, where to check, and how the price of a voluntary contribution compares with what a year may add.
Why one missing year can matter
The new State Pension is built on a National Insurance record rather than on salary. According to GOV.UK, you need 10 qualifying years to get any new State Pension, and if your record began after April 2016 you need 35 qualifying years for the full rate. GOV.UK currently gives the full new State Pension as £241.30 a week.
That figure is the ceiling, not a guarantee. Someone with 33 qualifying years is not short of a cliff edge, but they are short of the full amount, and the shortfall lasts for the whole of retirement. For readers in their forties and fifties with a patchy record, the question is less “will I get a pension?” than “is the amount I am heading for the one I assumed?”
How do gaps appear in a National Insurance record?
A qualifying year is one in which you paid National Insurance, received National Insurance credits or paid voluntary contributions. GOV.UK lists the common reasons a year can fall short:
- time spent living or working abroad;
- self-employment with annual profits below the small profits threshold, which GOV.UK gives as £7,105 in its guidance on voluntary contributions;
- periods out of work without claiming anything that carries credits;
- earning too little from employment to reach the level at which a year counts.
Credits soften many of these. GOV.UK explains that you may receive credits while claiming benefits because you are ill or unemployed, and that registering for Child Benefit can generate credits that can be transferred to a spouse or partner living with you. Not claiming, or not registering, is a common cause of avoidable gaps.
Contracting out is a separate complication. GOV.UK notes that people who were contracted out before 2016 will usually need more than 35 years for the full rate, and that voluntary contributions do not always increase the pension, for example if you were contracted out.
Where to look: the record and the forecast
Two free GOV.UK services do most of the work, and they answer different questions.
| Tool | What it shows |
|---|---|
| National Insurance record | Contributions and credits paid, gaps, which years do not count as qualifying years, and whether voluntary contributions would benefit you |
| State Pension forecast | How much State Pension you could get, when you could get it, and whether you can increase it |
The record can be viewed online after signing in, usually with photo ID, or requested as a printed statement. GOV.UK says the record shows contributions up to the start of the current tax year, which this year means 6 April 2026, and that statements cannot be requested for the current or previous tax year. The forecast is available online, through the HMRC app, or by post or phone.
The sensible order is the forecast first, then the record. The forecast reveals whether you are already on course for the full amount. If you are, filling a gap may add nothing, and GOV.UK specifically advises checking the forecast to see whether paying will benefit you before spending any money.
What does a voluntary contribution cost?
Voluntary contributions that count towards the State Pension are Class 3. GOV.UK’s rates page lists the following weekly figures:
| 2026 to 2027 | 2025 to 2026 | |
|---|---|---|
| Class 3 (voluntary) | £18.40 | £17.75 |
| Class 2 | £3.65 | £3.50 |
A full year is 52 weeks, so illustrative arithmetic gives £18.40 × 52 = £956.80 for a 2026 to 2027 year and £17.75 × 52 = £923.00 for a 2025 to 2026 year. Class 2 is the cheaper route that some self-employed people are able to use, at £3.65 × 52 = £189.80 for a year, but eligibility depends on circumstances and is explained on the GOV.UK pages.
The cost of Class 3 therefore sits at under £1,000 for a year. Whether that is good value is a separate question, and one that the next sections address.
A worked example: weighing the cost against the benefit
The new State Pension is not paid by a published formula of “one thirty-fifth per year” on GOV.UK’s pages, so this is a simplification, but it is a reasonable way to frame the maths. Suppose, for illustration, that each qualifying year contributes roughly one thirty-fifth of the full rate:
- £241.30 ÷ 35 = about £6.89 a week for each year, or around £358 a year (£6.89 × 52).
- A 2026 to 2027 Class 3 year costs £956.80.
- £956.80 ÷ £358 gives roughly 2.7 years of pension to recoup the outlay, before any increases from future uprating and ignoring tax on the pension.
On those assumptions, a gap filled at 50 would repay in its first few years of retirement, and a pension drawn for two decades would pay back several times the outlay. This is an illustration, not a prediction: your forecast gives the real figure for your record, and the real return depends on how long you live, how the pension is uprated, and whether the extra year changes your amount at all.
The same arithmetic flatters less in two cases. If you already have 35 or more qualifying years, an additional one adds nothing. If you have fewer than 10, the position is different again, because a year can be the difference between no pension and some pension.
Is there a deadline for paying?
Yes, and it is the part most easily missed. GOV.UK states that voluntary contributions can only be paid for the past six years, with a deadline of 5 April each year. For example, contributions for the 2025 to 2026 tax year can be paid until 5 April 2032. Older gaps can no longer be filled.
Readers may remember special arrangements that allowed older years to be filled. GOV.UK’s current guidance on deadlines does not mention any extension, so anyone relying on an earlier concession should confirm their position with HM Revenue and Customs rather than assume it still applies.
The practical result is a rolling window. A gap from the 2020 to 2021 year is already close to the edge, while a gap from last year has several years to run. Waiting costs something too: Class 3 rates rise from year to year, as the move from £17.75 to £18.40 shows.
Who should pause before paying?
Paying voluntarily is not always the right move, and GOV.UK lists the checks that come first:
- Check whether you qualify for credits. If credits already cover the year, you may not need to pay at all.
- Check the forecast. Voluntary contributions do not always increase the pension.
- Consider your State Pension age. GOV.UK suggests paying is most relevant if you are close to State Pension age without enough qualifying years, or expect not to build enough during your working life. Once you have reached State Pension age, GOV.UK directs you to the Pension Service instead.
- Consider the alternative uses of the money. A workplace pension contribution, an ISA or paying down debt compete for the same pounds. Our look at the Autumn Budget 2026 and pensions and ISAs sets out how quickly the surrounding rules can shift, and the piece on why cash is regaining appeal for higher earners covers one competing use of spare money.
Some groups deserve particular attention: people who have lived abroad, the self-employed with low profits, and those who took career breaks. Anyone approaching retirement with a thin record has the most to gain from a prompt look.
Where London households fit in
Longer, more varied careers, overseas postings and spells of self-employment are common among London professionals, which makes uneven National Insurance records more likely rather than less. Household income also varies widely between boroughs, as our piece on what London’s household income figures reveal explains, and a record that looks secure for one earner in a couple may be patchy for the other. Looking at both partners’ records is a sensible habit.
Conclusion: a ten-minute check with a long shelf life
A National Insurance gap is easy to overlook and, within the six-year limit, often inexpensive to fix. The steps are simple: request a State Pension forecast, review the National Insurance record, understand the credits that may already apply, and only then decide whether a voluntary contribution makes sense. The cost of a year, under £1,000 at the current Class 3 rate, is small beside a pension that may be paid for decades, but only where the forecast shows the year would change the amount.
This article is general information, not personalised financial advice. Rules, rates and deadlines change, so confirm current figures before acting.
Sources: GOV.UK
