What Is the State Pension Triple Lock?
The triple lock is a government policy that guarantees the State Pension increases each April by whichever is the highest of three measures: the growth in average earnings, the rise in prices as measured by the Consumer Prices Index (CPI), or 2.5 per cent. This mechanism was introduced in 2011 by the Coalition government and has been retained by successive administrations ever since.
The purpose of the triple lock is straightforward: to ensure that the State Pension keeps pace with the cost of living or rising wages, whichever is higher, and to guarantee a minimum increase even when both inflation and earnings growth are very low. Before the triple lock was introduced, pension increases were linked only to the Retail Prices Index (RPI), and before that, to earnings, leading to periods where pensioners saw their incomes fall behind in real terms.
For the 2026/27 tax year, the full new State Pension stands at £230.25 per week (£11,973 per year) following a 4.1% increase applied in April 2026. This increase was triggered by the average earnings growth figure, which was the highest of the three measures for this uprating cycle.
How the Triple Lock Calculation Works
Each autumn, the government looks at three figures to determine the following April’s pension increase:
- Average earnings growth – The year-on-year percentage change in average weekly earnings for the May–July quarter, published by the Office for National Statistics (ONS)
- CPI inflation – The Consumer Prices Index reading for September, published by the ONS in October
- 2.5 per cent – A fixed floor, guaranteeing a minimum increase regardless of the other two figures
The government selects whichever of these three figures is highest and applies that percentage increase to the State Pension the following April. The Secretary of State for Work and Pensions confirms the uprating in a parliamentary statement each autumn, and the new rates take effect from the first Monday on or after 6 April.
Triple Lock Increases Since 2011
The table below shows how the triple lock has driven State Pension increases over the years. Notice that different measures have been the determining factor at different times, demonstrating why all three elements of the lock matter.
| Tax Year | Increase | Driven By | Full New SP (weekly) |
|---|---|---|---|
| 2020/21 | 3.9% | Earnings | £175.20 |
| 2021/22 | 2.5% | 2.5% floor | £179.60 |
| 2022/23 | 3.1% | CPI inflation | £185.15 |
| 2023/24 | 10.1% | CPI inflation | £203.85 |
| 2024/25 | 8.5% | Earnings | £221.20 |
| 2025/26 | 4.1% | Earnings | £230.25 |
| 2026/27 | 4.1% | Earnings | £230.25 |
The 2022 Controversy: When the Triple Lock Was Suspended
The triple lock was temporarily modified for the 2022/23 tax year. Average earnings growth had spiked to over 8% due to distortions caused by the pandemic – when millions of workers came off furlough, the statistical measure showed an artificially large rise in average pay. The government argued that applying an 8% increase to State Pensions would be unfair to working-age taxpayers, and instead applied a “double lock” based on the higher of CPI inflation or 2.5%.
This decision was controversial. Many pensioner groups argued that the triple lock was a commitment that should not be broken, regardless of statistical anomalies. The government reinstated the full triple lock from April 2023 onwards, and subsequent increases have been significant – the 10.1% rise in 2023/24 was the largest State Pension increase in decades.
Which Parts of the State Pension Does the Triple Lock Cover?
The triple lock does not apply equally to every component of the State Pension system. Understanding which parts are covered is important for planning your retirement income.
Covered by the Triple Lock
- The full new State Pension – For anyone who reached State Pension age from 6 April 2016 onwards
- The old basic State Pension – For anyone who reached State Pension age before 6 April 2016
- Protected payments – If your starting amount in 2016 exceeded the full new State Pension rate, the excess is a protected payment which also rises by the triple lock
Not Covered by the Triple Lock
- Additional State Pension (SERPS/S2P) – This is increased only by CPI inflation, not the triple lock
- Graduated Retirement Benefit – Also increased by CPI only
- Pension Credit – The Guarantee Credit element has traditionally been increased in line with earnings, not the triple lock, though in practice rises have broadly matched
Why the Triple Lock Matters for Your Retirement
The triple lock has a compounding effect that makes a significant difference over a long retirement. Even small differences in the annual increase rate add up substantially over 20 or 30 years of retirement. To illustrate this, consider how the full new State Pension might grow under different scenarios over the next 20 years:
| Scenario | Annual Increase | Weekly SP After 10 Years | Weekly SP After 20 Years |
|---|---|---|---|
| Triple lock (avg 4%) | 4.0% | £340.83 | £504.62 |
| CPI only (avg 2.5%) | 2.5% | £294.71 | £377.04 |
| Flat 2.5% floor | 2.5% | £294.71 | £377.04 |
| No increase | 0% | £230.25 | £230.25 |
As this table demonstrates, the triple lock can potentially result in a State Pension that is over £100 per week higher after 20 years than it would be under a CPI-only approach. Over a full year, that equates to more than £5,000 in additional income.
The Cost of the Triple Lock
The triple lock is expensive for the government. State Pension spending is the single largest item of welfare expenditure in the UK, costing over £130 billion per year. The Office for Budget Responsibility (OBR) has estimated that the triple lock adds billions of pounds to annual spending compared to a CPI-only or earnings-only approach.
This cost is one reason why the triple lock’s long-term future is uncertain. As the population ages and the ratio of pensioners to working-age adults increases, the fiscal pressure will grow. Several think tanks and policy bodies have suggested alternatives, including:
- A “double lock” based on earnings and CPI only (removing the 2.5% floor)
- A “smoothed earnings link” using a multi-year average of earnings growth
- Linking pension increases to a measure of pensioner living costs rather than general CPI
- Setting a target replacement rate (the proportion of average earnings that the State Pension represents) and adjusting increases accordingly
What Happens If the Triple Lock Is Changed?
If a future government were to weaken or scrap the triple lock, the impact would depend on what replaces it. Moving to a CPI-only link would mean the State Pension keeps pace with general inflation but could fall behind wages over time. Removing the 2.5% floor would matter most in periods of very low inflation and low wage growth, as happened in the early 2010s.
For anyone relying primarily on the State Pension in retirement, the triple lock provides valuable protection. However, financial advisers generally recommend not relying solely on the State Pension. Building private pension savings through workplace pensions, personal pensions, or SIPPs can help ensure you have a comfortable retirement regardless of future policy changes.
How the Triple Lock Interacts With Tax
One consequence of the triple lock is that it pushes the State Pension closer to – and in some cases above – the Personal Allowance (the amount you can earn before paying income tax). The Personal Allowance has been frozen at £12,570 since 2021 and is expected to remain frozen until at least April 2028.
With the full new State Pension now at £11,973 per year, there is very little room before pensioners start paying tax on their State Pension income alone. Any additional income from private pensions, savings interest, or part-time work could push you over the threshold. For more on this, see our guides on tax on the State Pension and State Pension and the Personal Allowance.
How to Maximise Your State Pension Under the Triple Lock
The triple lock benefits everyone who receives the State Pension, but you can take steps to ensure you receive the maximum possible amount:
- Build up 35 qualifying years – You need 35 years of National Insurance contributions to receive the full new State Pension. Each missing year reduces your pension proportionally.
- Fill any NI gaps – If you have gaps in your NI record, consider paying voluntary contributions to fill them. The cost of filling a gap is far less than the lifetime pension gain.
- Check your State Pension forecast – Use the State Pension forecast service to see what you are on track to receive and whether you need to take action.
- Consider deferring – If you can afford to delay claiming your State Pension, you receive an increase of approximately 5.8% for each full year you defer, on top of the triple lock rise. See our deferral guide for details.
- Claim NI credits – If you are caring for children, looking after an elderly relative, or claiming certain benefits, make sure you are receiving the NI credits you are entitled to.
The Political Future of the Triple Lock
The triple lock has become one of the most politically significant pension policies in the UK. It is popular with voters – particularly older voters, who make up a disproportionately large share of the electorate – and parties are reluctant to be seen as weakening it. The current Labour government has committed to maintaining it for the duration of this Parliament.
However, the long-term fiscal pressures are real. The number of people over State Pension age is growing, life expectancy (despite recent stagnation) is higher than when the triple lock was introduced, and the State Pension age is rising to 67 between 2026 and 2028. The review of the State Pension age, due to report in 2026, may also influence the debate about how pensions are uprated.
For now, the triple lock remains in place and continues to deliver meaningful real-terms increases to the State Pension. The best approach for anyone planning their retirement is to factor in the triple lock as it currently stands, while also building private pension savings that do not depend on government policy decisions.