The Triple Lock Explained
Each spring the State Pension goes up. The amount of the increase is set by a rule called the triple lock. This page explains what the rule is, how the figure for any given April is chosen, and the limits and quirks that change the answer.
The rule, in one sentence
The triple lock raises the State Pension each April by the highest of three numbers: the rise in average earnings, the rise in consumer prices, or 2.5%. Whichever of those three is largest in the relevant measurement period becomes the percentage uplift applied to the weekly amount.
The three measures
Each measure uses a specific definition. Substituting a different one — using the Retail Prices Index instead of CPI, for example, or using year-on-year wage growth from a different month — would produce a different answer. The current definitions are:
- Earnings growth: the headline annual change in average weekly earnings (regular plus bonus pay) for the May to July period, published by the Office for National Statistics. The September release feeds into the autumn uprating decision.
- Price inflation: the year-on-year change in the Consumer Prices Index (CPI) for the September that immediately precedes the April when the uplift takes effect.
- Floor: 2.5%. This is a fixed number written into the policy.
The Secretary of State for Work and Pensions is required to review State Pension uprating annually. The number announced in the autumn (usually around the time of the Budget) takes effect from the following 6 April.
What the triple lock applies to
Both the basic State Pension (paid to people who reached pension age before 6 April 2016) and the new State Pension (paid to people reaching pension age on or after that date) are uprated by the triple lock. Specifically, the standard rates of those pensions are uplifted: the full new State Pension and the basic-rate component of the old system.
It does not apply to every component of every pension award. The additional State Pension (SERPS / S2P) elements that some older retirees have are uprated separately, normally in line with CPI rather than the triple lock. The Graduated Retirement Benefit, paid to people who contributed before 1975, also has its own rule.
A worked example
Suppose September CPI comes in at 4.1%, the relevant earnings figure is 5.6%, and the floor is 2.5%. Earnings growth is the highest of the three, so the State Pension rises by 5.6% the following April. If the full new State Pension was £230.25 per week beforehand, the calculation looks like this:
- £230.25 × 1.056 = £243.14 (rounded to the nearest 5 pence by convention)
- Annualised, that is roughly £12,643 per year.
If, in another year, both inflation and earnings come in below 2.5%, the floor kicks in and the increase is exactly 2.5%. The point of the floor is to stop the State Pension lagging during periods of low inflation and low wage growth.
Why the triple lock exists
Before 2010 the basic State Pension was uprated in line with prices. Over decades, prices generally rose more slowly than earnings, so the State Pension fell as a percentage of average wages. The triple lock was introduced in 2010 to halt that erosion and has lifted the State Pension's value relative to wages in most years since.
Where it gets messy
Two episodes show that the rule is not always applied mechanically.
- Pandemic distortion (2021). Earnings figures were temporarily inflated by the unwinding of furlough. Parliament passed a one-year amendment using a "double lock" (CPI or 2.5%, whichever was higher) for the April 2022 increase.
- Smoothing or capping proposals. Reviews have repeatedly suggested smoothed earnings, or a "double lock" without the 2.5% floor, to make long-run costs more predictable. As at 2026 the headline triple lock remains in place, but expect the policy to be revisited.
How it interacts with tax
The State Pension is taxable income. The personal allowance — the amount of income you can receive each year before paying income tax — has been frozen for several years, while the State Pension has risen with the triple lock. The arithmetic is therefore catching more pensioners in the tax net even when their real income is unchanged. Our guide to State Pension and tax walks through what that means in practice.
What it does and doesn't promise you
The triple lock is a rule about the headline rate paid to people receiving the standard State Pension. It is not a guarantee of your personal income for several reasons:
- You only get the full new State Pension if you have at least 35 qualifying years on your National Insurance record. With fewer years, your pension is a proportional fraction (see how it's calculated).
- If you have a contracted-out deduction, it reduces your starting amount; the triple-lock uplift then applies to the reduced figure.
- If you live in a country where the UK does not uprate (see living abroad), the triple lock may not reach you. Your weekly amount is frozen at the rate that applied when you first qualified abroad.
- If you defer, the deferral uplift (around 5.8% per year of deferral under the new system) is calculated on whatever the headline rate is at the time you start receiving payments. See our deferral guide for the trade-offs.
How to follow the announcement each year
Three signposts make it easy to track: the September CPI release from the Office for National Statistics (mid-October), the September average earnings release (mid-November), and the autumn fiscal event where the Secretary of State announces the figure that will take effect the following April. Our news page records each year's uplift.
Common questions
Does the triple lock apply to Pension Credit?
The Standard Minimum Guarantee in Pension Credit is uprated alongside the State Pension under the same earnings link, so in practice it tracks the triple lock. Other Pension Credit elements are uprated by CPI.
If I'm under State Pension age, does the lock affect my future entitlement?
The headline rate that will eventually be paid to you is uplifted each April. The number printed on your forecast today is in current-year money. By the time you actually retire, the figure will have moved with the lock. This is one reason a forecast checked at age 50 looks small compared to what you'll actually receive at age 67.
Could the triple lock be removed?
Yes. It is a policy commitment, not statute that survives a change of government. Both major parties have at various points been asked whether they would commit to keeping it for a full Parliament, and the answer has shifted with fiscal conditions. Long-range financial planning should not assume the rule is permanent.