Triple Lock
A government commitment to increase the State Pension each year by the highest of inflation, average earnings growth, or 2.5%.
The triple lock is a policy commitment by the UK government that guarantees the State Pension will increase each April by whichever is the highest of three measures: the rate of Consumer Prices Index (CPI) inflation, the growth in average weekly earnings, or 2.5%. This means the State Pension should, in theory, always keep pace with the cost of living and rising wages as a minimum.
The triple lock was introduced in 2010 and has been maintained by successive governments, though it has come under pressure at times. In 2022/23, the earnings element was temporarily suspended for one year due to distorted wage growth figures following the pandemic. The policy is popular with retirees because it provides certainty that their State Pension income will rise meaningfully each year, but it is expensive for the government and has been the subject of ongoing political debate.
For retirement planning purposes, the triple lock means you can reasonably expect the State Pension to grow in real terms over time. However, the triple lock is a policy commitment rather than a legal guarantee, and a future government could choose to change or replace it. When forecasting your retirement income, it is sensible to consider what would happen if the triple lock were modified or removed.