What is the State Pension triple lock?

How the triple lock has worked since 2011

The choice between CPI and earnings was particularly dramatic in 2022-2024 when inflation outpaced earnings and the lock paid out 10.1% — adding ~£17 a week to every pensioner's payment. By contrast, in steady years (2017-2020) earnings growth or the 2.5% floor often won.

Who gets the triple lock

The lock applies to:

• New State Pension (those reaching State Pension age on/after 6 April 2016)
• Basic State Pension (older retirees) — protected at 2.5% minimum, but Additional Pension and Pension Credit have separate uprating rules
• Some related benefits — Pension Credit Standard Minimum Guarantee follows the triple lock

It does not apply to:

• State Earnings-Related Pension Scheme (SERPS) or State Second Pension (S2P) — these uprate by CPI only
• Most working-age benefits (Universal Credit, ESA, JSA) — uprated by CPI
• Private pensions or annuities (depends on the scheme rules)

The fiscal cost — why politicians keep promising to keep it

The triple lock costs HM Treasury ~£8 billion a year more than if pensions had simply uprated by CPI. Over the last decade, the cumulative cost is estimated at £40-50 billion. The State Pension is now the single largest item in UK government spending, ahead of the NHS by some measures.

Every General Election since 2010 has seen all major parties pledge to keep the triple lock. Pensioners are the most reliable voting bloc in UK elections, and any party proposing to remove the lock has historically lost vote share. As of 2026, the Labour government has reconfirmed the commitment for the duration of Parliament.

Why this matters for retirement planning

The triple lock makes the State Pension uniquely valuable as a retirement income building block. Each £1 of State Pension provides effective inflation protection that costs roughly 4-5x more to buy in the private annuity market.

For most UK retirement planning:

• Treat the State Pension as the floor. £12,547.60/yr at 2026/27 levels, inflation-protected, with longevity protection (continues for life).
• Top up via private pensions / ISAs / Drawdown for additional income.
• Check your NI record at gov.uk/check-state-pension. 35 years of contributions is required for the full new State Pension. Gaps can be filled with voluntary Class 3 contributions (~£956.80 per missing year, paying back in 3-4 years of claiming).

The State Pension forecast calculator projects your eventual entitlement based on your NI record and shows what voluntary top-ups would add.

Sources and methodology

Triple lock policy from gov.uk/state-pension and Department for Work and Pensions. Historical uprating from DWP Statistics. New State Pension qualifying years from gov.uk/new-state-pension.

UK Tax Drag is not authorised by the Financial Conduct Authority and does not provide regulated financial advice — see the content disclaimer for the full position. The methodology page documents how every calculator is built and reviewed.

Related

• State Pension forecast calculator — project your eventual weekly amount
• Should I top up state pension? — voluntary contribution decision
• What is National Insurance? — the contribution system that builds your record
• Pension calculator — how State Pension fits with workplace + private pensions
• Full UK money glossary
• FAQ library

New State Pension vs the old basic State Pension

The triple lock protects two different systems, and which one you are in depends entirely on when you reach State Pension age:

• New State Pension — for anyone reaching State Pension age on or after 6 April 2016. It is a single, flat-rate payment (£241.30 a week in 2026/27 at the full rate) built almost entirely from your own National Insurance record.
• Basic State Pension — for those who reached State Pension age before 6 April 2016. The full basic rate is lower, but many older pensioners also receive an Additional State Pension (SERPS / State Second Pension) on top, which can take their total above the new flat rate. The basic element is protected by the triple lock; the Additional element is uprated by CPI only.

This is why two neighbours can receive very different amounts. A pensioner on the pre-2016 system with a large Additional Pension may out-earn someone on the new flat-rate pension, even though the headline "full new State Pension" figure looks higher. The two systems are not directly comparable, and online "full amount" figures almost always refer to the post-2016 new State Pension.

People who built up NI before 2016 have their starting amount calculated under transitional rules: HMRC works out their entitlement under both the old and new systems at April 2016 and uses the higher "starting amount", which can then be topped up by further qualifying years until they reach the full new rate.

Qualifying years: 35 for the full amount, 10 to get anything

The State Pension is not all-or-nothing, but it does have a floor. Under the new State Pension:

• You generally need 35 qualifying years of National Insurance to receive the full new State Pension.
• You need a minimum of 10 qualifying years to receive any new State Pension at all. Fewer than 10 years and you get nothing under the new system.
• Between 10 and 35 years you receive a proportionate amount — broadly, each qualifying year is worth roughly 1/35th of the full pension.

A "qualifying year" is one in which you paid or were credited with enough National Insurance. Crucially, you do not have to be working to build one. NI credits fill gaps for many people automatically — for example while claiming Child Benefit for a child under 12, while receiving certain carer's or disability benefits, or while on Statutory Maternity Pay or Jobseeker's Allowance. A parent at home with young children is often still building a qualifying record without paying a penny of NI, provided Child Benefit is claimed (even if the payments are declined because of the High Income Child Benefit Charge).

Check your forecast and fill gaps with voluntary NI

Because the amount depends entirely on your record, the single most useful action is to read your own forecast. The government's Check your State Pension forecast service (accessed through a free Government Gateway / GOV.UK One Login account) shows three things: the amount you have built so far, the amount you are on track for, and a year-by-year breakdown of which years are complete, incomplete or missing.

Where you have gaps, you can often fill them by paying voluntary Class 3 National Insurance (the self-employed usually use cheaper Class 2). At roughly £956.80 for a full missing year, a single year typically adds about 1/35th of the full pension — in the region of £6 a week, or over £300 a year, for life. For most people that cost is recovered within three to four years of drawing the pension, after which it is pure gain, which is why topping up is often one of the highest-return uses of spare cash for those approaching retirement.

• You can normally fill gaps from the past six tax years. Older years can sometimes be bought under transitional rules, but those windows close, so it is worth checking your forecast well before State Pension age rather than at the last minute.
• Topping up is not worthwhile for everyone — if you are already on track for the full amount, or extra years will not increase your entitlement, paying more achieves nothing. Always check the forecast (or call the Future Pension Centre) before paying.

Our voluntary NI decision guide and Class 3 top-up calculator work through whether a top-up pays off in your specific case.

The frozen-allowance problem: when the State Pension meets the tax threshold

The triple lock raises the State Pension every year, but the Personal Allowance — the amount of income you can receive before paying income tax — has been frozen at £12,570 for several years. The two are now on a collision course. In 2026/27 the full new State Pension is around £12,547.60 a year, sitting just below the £12,570 tax-free threshold.

If the triple lock continues to push the pension up by more than 0% while the Personal Allowance stays frozen, the full new State Pension will eventually exceed £12,570. At that point pensioners with no other income at all would, for the first time, owe a small amount of income tax purely on their State Pension. This is fiscal drag in its purest form: the threshold does not move, so rising payments are slowly dragged into tax.

Two practical points follow:

• The State Pension is paid gross — no tax is deducted at source. If your total income (State Pension plus any private pension, employment or savings income above the relevant allowances) exceeds your Personal Allowance, HMRC usually collects the tax by adjusting the tax code on your other income, or via Self Assessment. Pensioners with only the State Pension and no PAYE source may receive a "Simple Assessment" letter instead.
• Anyone already topping up the State Pension with a private pension or drawdown is likely to be paying tax on the combined total well before the State Pension alone reaches the threshold — so the freeze affects far more pensioners than the headline "tax on the State Pension" framing suggests.