How to Check Your State Pension Forecast and Fill NI Gaps

Your State Pension is likely to be one of the most valuable assets you own in retirement. At £221.20 per week in 2026/27, a full State Pension paid from age 66 to age 86 is worth over £230,000 in total payments. Yet millions of UK workers have gaps in their National Insurance record that will reduce this figure — often without realising it. This tutorial walks you through checking your forecast and deciding whether to fill any gaps.

Step 1: Check Your State Pension Forecast Online

The quickest way to see your projected State Pension is through the government's official service.

How to Access Your Forecast

1. Go to check.gateway.gov.uk (or search "Check your State Pension forecast" on GOV.UK)
2. Sign in with your Government Gateway account (or create one — you'll need your National Insurance number)
3. Your personalised forecast will show:
   • Your current projected weekly State Pension amount
   • Your current NI qualifying years
   • How many more years you need for the full amount
   • Any gaps in your record

If you prefer, you can request a paper State Pension statement by calling the Future Pension Centre on 0800 731 0175 (free, Monday to Friday, 8am–6pm).

What the Forecast Tells You

Your forecast will show one of three scenarios:

Step 2: Review Your NI Record

Your NI record shows every tax year from age 16. Each year is categorised as:

• Full year: Qualifies fully — counts towards your 35 years
• Year with a gap: Incomplete — does not qualify unless you fill it
• Year that cannot be filled: Too old to purchase, or already maximum

Gaps appear for various reasons:

• Low earnings (below the Lower Earnings Limit of £6,396 in 2026/27)
• Self-employment periods where Class 2 NI wasn't paid
• Career breaks (caring for children or elderly relatives)
• Time living or working abroad
• Periods on certain benefits (though many benefits award NI credits automatically)

NI Credits: Free Qualifying Years

Before buying voluntary contributions, check whether you may be entitled to NI credits — which fill gaps at no cost:

Many parents who stay at home with children are entitled to NI credits via Child Benefit — but only if Child Benefit was claimed in their name. If your partner claimed Child Benefit in their name while you were the non-working parent, you may have missed years of credits. Contact HMRC to investigate and retrospectively claim credits where eligible.

Step 3: Understand the Voluntary Contribution Rates

If you have genuine gaps that cannot be covered by credits, you can purchase voluntary Class 3 National Insurance contributions.

2026/27 Rate

Class 2 contributions are only available to self-employed individuals who had small profits (below the Small Profits Threshold) in a given year. They are far cheaper than Class 3. If you were self-employed during a gap year, check whether Class 2 applies before paying Class 3 rates.

Step 4: Work Out the Break-Even Point

Is it worth paying £824.20 to fill a gap? The maths is straightforward:

Benefit of one qualifying year:

• Full State Pension: £221.20/week ÷ 35 years = £6.32/week extra per qualifying year
• Annual increase: £6.32 × 52 = £328.64/year

Break-even calculation:

• Cost: £824.20
• Annual gain: £328.64
• Break-even: 824.20 ÷ 328.64 = 2.5 years of pension receipt

In practice, allowing for inflation and the triple lock (which increases State Pension annually by the highest of earnings growth, CPI inflation, or 2.5%), the break-even is typically 3–4 years.

Given State Pension age is currently 66, and average life expectancy at 66 is approximately 85–87, most people will receive their pension for 19–21 years — making gap-filling an excellent investment for most circumstances.

When It May Not Be Worth It

• You are already projected to receive the full State Pension (35+ qualifying years)
• You have a serious health condition that significantly reduces life expectancy
• You have fewer than 10 qualifying years and the gap is so large it would cost many thousands to bridge (though even then, additional pension per year for a lifetime often justifies the cost)

Step 5: How to Pay Voluntary Contributions

Once you've decided which years to fill:

1. Contact HMRC first — call 0300 200 3500 and ask them to confirm the cost and eligibility for specific years before paying
2. Get a reference number — HMRC will give you a payment reference for each year you wish to fill
3. Pay online or by bank transfer — through your Government Gateway account or BACS
4. Allow 6–8 weeks for the NI record to update after payment

Important: Always confirm with HMRC before paying. The forecast tool shows a snapshot and may not reflect recent employment or credits that haven't yet been processed.

The Six-Year Window: What You Can Still Fill

Since April 2025, you can only buy back gaps from the past six complete tax years. In 2026, this means you can fill gaps back to 2020/21 (the 2019/20 year became ineligible after April 2025).

Each April, another year drops off the back of this rolling six-year window. If you have gaps in 2020/21, you have until 5 April 2027 to fill them before that year becomes inaccessible.

Deferring Your State Pension

If you reach State Pension age (currently 66) and continue working, you do not have to claim your State Pension immediately. Deferring adds to your weekly payment:

There is no lump sum option for those who defer under the New State Pension rules (unlike the old Basic State Pension). The enhancement is simply added to your weekly payment for life.

Deferral makes sense if you do not need the income immediately and have other sources of retirement income to draw on in the meantime. It is less beneficial if you have health concerns affecting life expectancy.

Overseas Residents and NI Contributions

If you've lived or worked abroad, your situation may be more complex:

• EU/EEA: Social security periods from other EU/EEA countries may count towards your State Pension entitlement under UK-EU Social Security coordination agreements (post-Brexit rules apply from 2021)
• Countries with reciprocal agreements: The UK has agreements with some countries (e.g., USA, Japan) that allow NI years to be combined
• No agreement countries: Periods working in countries without a reciprocal agreement do not count — but you can pay voluntary Class 2 or Class 3 contributions from abroad

If you've spent significant time abroad, contact the International Pension Centre (0191 218 7777) for personalised guidance.

Summary: Your Action Plan

1. Check your forecast at check.gateway.gov.uk
2. Identify gaps and check whether NI credits cover any automatically
3. Calculate break-even for gaps you're considering filling (£824.20 ÷ annual pension increase)
4. Act before each April 5 when the rolling six-year window advances and older gaps become unfillable
5. Contact HMRC to confirm costs before paying — always get a reference number first

The State Pension is inflation-proofed (triple lock), guaranteed by the government, and lasts your entire life. Filling NI gaps is one of the most risk-free, high-return investments available to UK residents approaching retirement age.