UK State Pension Forecast: How to Check Yours and Fill the Gaps in 2026

Quick answer

The UK State Pension is paid weekly (or 4-weekly) once you reach State Pension Age. For 2025/26:

• Full new State Pension: £230.25/week = £11,973/year.
• State Pension Age: currently 66, rising to 67 between April 2026 and March 2028.
• Tax treatment: taxable as income, but not subject to NI.

To maximise your State Pension, you need to ensure you have 35 NI qualifying years by your State Pension Age. Most UK adults reach this automatically through employment, self-employment, or NI credits for carers/parents.

But many people have gap years — periods without qualifying contributions. Those gaps can be filled with voluntary Class 3 NI contributions.

How to check your forecast

The single most useful 5 minutes in UK personal finance:

1. Go to gov.uk/check-state-pension.
2. Sign in with Government Gateway (or HMRC app).
3. The tool shows:
   • Your forecast amount at State Pension Age (in today's money).
   • Total qualifying years so far.
   • Years to State Pension Age (e.g. "12 years to go").
   • Whether your forecast is affected by gaps.
   • Gap years that can be filled.
   • Cost to fill each gap year (typically £907.40 for a full year).

Save the forecast PDF. Recheck annually.

What counts as a qualifying year

You get a NI qualifying year if any of these apply for the tax year:

• You paid Class 1 NI as an employee (earning above the Primary Threshold).
• You paid Class 2 NI as self-employed (now auto-credited if profits over £6,725).
• You received NI credits for:
  • Receiving Child Benefit for a child under 12.
  • Caring for someone disabled (Carer's Credit / Carer's Allowance).
  • Receiving Universal Credit / Jobseeker's Allowance / ESA.
  • Being on Statutory Sick Pay or Maternity Pay below Primary Threshold.
  • Jury service.
  • 16-18 year-olds in education (auto-credited).

Common gap-year causes:

1. Living abroad (especially in non-reciprocal countries).
2. Stay-at-home parent with a child over 12 (NI credits stop).
3. Part-time work below Primary Threshold (currently £12,570/yr).
4. Self-employed with profits below SPT (£6,725) who didn't pay voluntary Class 2.
5. University/training years before age 16.

Worked example — Sarah at age 50

Sarah checks her State Pension forecast at age 50:

• Forecast: £8,950/year (about £172/week).
• Qualifying years so far: 27.
• Years to State Pension Age (67): 17.
• Gap years 2006/07–2011/12 (when she stayed home with young children before NI credits caught up): 6 years.

Without intervention: if she works the next 17 years, she'll add 17 more qualifying years → 44 total. But the maximum is 35 — so 9 are wasted. Her forecast £8,950 is the result of not filling the 6 gap years; she's projected to reach 35 qualifying years already but has them in the wrong place.

Wait, more carefully: her forecast of £8,950 = (27/35) × £11,973 ≈ £9,235 → actually projected with 27 years giving roughly £9,200. The 17 future years bring her to 44, but cap at 35 = full £11,973.

Better strategy: if Sarah's forecast says "full" once she works to State Pension Age, she doesn't need to fill gaps. If it says less than £11,973, she should fill cheapest available years.

Always read the forecast text carefully — it tells you whether your future contributions will get you to the maximum.

The voluntary Class 3 calculation

Voluntary Class 3 NI lets you buy missing years.

• Cost (2025/26): £17.45 per week, or £907.40 for a full year.
• Benefit: roughly 1/35th of the full State Pension per qualifying year added.
• 1/35 × £11,973 = £342/year added to your eventual State Pension.

Slightly different headline numbers depending on the exact rate of CPI uplift, but ~£329-£342/year per year purchased is the typical benefit.

Payback period: £907.40 / £342 = 2.65 years of receiving State Pension before you're net positive. After that, every year of life is pure profit.

Anyone living past their 70th birthday wins (State Pension Age 67 + 2.65 years).

The deadline extension to April 2027

A 2023 announcement extended the window to fill historic gap years back to 6 April 2006. The deadline:

• Originally: 5 April 2025.
• Extended: 5 April 2027.

After 5 April 2027, you can only fill the most recent 6 years.

So in 2026, you have until April 2027 to fill any gap year between 2006/07 and 2019/20. After April 2027, only 2020/21 onwards becomes fillable in the standard 6-year window.

For someone with 5-10 gap years in their 30s/40s, this is a once-in-a-lifetime opportunity.

When NOT to buy voluntary contributions

Some scenarios where buying isn't worth it:

1. You're already projected for the full State Pension

If your forecast already shows £11,973/yr (or projected to reach it with future working years), buying more years adds £0 — extra qualifying years above 35 are wasted.

2. You expect a short retirement

If you have a serious health condition reducing life expectancy below State Pension Age + 3 years, payback might not materialise. (Bleak but real consideration.)

3. You're moving abroad to a non-reciprocal country

State Pension is frozen when you live in some countries (Australia, Canada, NZ, etc.). It doesn't get triple-lock uplifts. Less valuable to maximise.

In countries with reciprocal agreements (EU/EEA, US, etc.), it continues to uplift annually.

4. You can use the money better elsewhere

A £907.40 voluntary contribution returns ~£342/year (forever). That's a ~37% annual yield in retirement, plus inflation protection. Hard to beat anywhere — but if you have:

• £20,000 of credit card debt at 23%: clear the debt first.
• A 30+ year horizon and prefer market-return investing: SIPP/ISA may grow faster.

For most people, voluntary Class 3 is exceptional value.

The triple lock

State Pension rises annually under the triple lock: the higher of:

1. CPI inflation.
2. Average earnings growth.
3. 2.5%.

For 2025/26: earnings growth was the highest at ~4.1% — pension rose to £230.25/week from £221.20.

For 2026/27: forecasts suggest CPI ~3% will be the binding measure — projected rise to roughly £237/week (£12,344/year).

The triple lock is confirmed through 2029/30 by current government. Long-term reviews are ongoing but no change announced.

Tax treatment

The State Pension is taxable as income but not subject to NI. It uses your Personal Allowance like any other income.

• £11,973 State Pension alone: no tax (within PA).
• £11,973 + £15,000 other pension drawdown = £26,973 taxable income. Income tax:
  • PA £12,570: £0.
  • Basic rate 20% on £14,403: £2,881.

HMRC manages this through PAYE if you have another pension or job — your tax code is reduced to offset the untaxed State Pension.

How to pay voluntary Class 3

Once you've identified which years to fill:

1. Confirm via gov.uk/check-state-pension the cost (it varies by year).
2. Phone the Future Pension Centre (0800 731 0175) for personalised advice on whether each year is worth filling. Free service. They'll check your forecast holistically and flag if a year wouldn't help your final pension.
3. Pay via gov.uk using the reference they provide. Bank transfer is fastest.
4. Allow 8-12 weeks for HMRC to credit the year to your NI record.
5. Re-check your forecast to confirm uplift.

The Future Pension Centre is genuinely helpful — call them before you pay anything to avoid wasting money on years that wouldn't help (e.g. years before you have 10 qualifying years total, which don't unlock any State Pension entitlement).

Common mistakes

1. Never checking the forecast — even 5 minutes once a year would catch most issues.
2. Buying years without calling Future Pension Centre — wasting money on years that don't help.
3. Assuming employer NI = qualifying year — it does, but only if you earned above the Primary Threshold.
4. Missing the 5 April 2027 deadline for filling historic gap years.
5. Forgetting that part-time workers below £12,570 don't accrue qualifying years through pay alone.

Practical action plan

Before 5 April 2027:

1. Check your forecast at gov.uk.
2. Identify gap years the system flags.
3. Call Future Pension Centre to confirm which years would actually help.
4. Pay for the worthwhile years via gov.uk.
5. Re-check forecast in 2-3 months.

For someone with 5-8 gap years from 2006/07 onwards, this can permanently add £1,500-£2,500/year to retirement income — for a one-off outlay of £4,500-£7,200.

Sources

• gov.uk: Check your State Pension forecast
• gov.uk: Voluntary National Insurance contributions
• DWP: The new State Pension
• HMRC: National Insurance: credits
• HM Treasury: triple-lock policy