The state pension triple lock is the government’s promise that the annual rise in payments will always be at least the highest of three benchmarks: inflation as measured by the Consumer Prices Index (CPI), average wage growth, or a flat 2.5 per cent. Introduced in 2011, the mechanism was designed to reverse the long decline in the value of the state pension relative to earnings. Between the 1980s and the 2000s, when pensions rose only with prices and wages grew faster, the basic pension fell from 26 per cent of the average wage to just 16 per cent. The triple lock was intended to steer it back in line with national living standards and address pensioner poverty.
The triple lock explained
Each year the Department for Work and Pensions calculates the increase using the highest of the three measures. For the 2026/27 tax year, average wage growth was the deciding factor, delivering a 4.8 per cent rise. This means the full new state pension – for those who reached pension age after April 2016 – now stands at £241.30 a week, or £12,548 a year. Pensioners on the older basic system, who reached state pension age before that date, receive £184.90 a week, equivalent to £9,614.80 a year. The triple lock applies to most state pension payments, but not to the Additional State Pension or extra amounts for deferring the pension, both of which rise only with CPI.
The promise has been kept almost without exception. The government has wriggled out of the commitment only once. After the Covid-19 pandemic, when the furlough scheme ended and employment rebounded, average wage growth hit 8.4 per cent while CPI stood at 3.1 per cent. Few begrudged the decision that year to use inflation instead, citing exceptional circumstances. The following year the differential was almost as dramatic, but this time in the opposite direction: in 2022 the post-pandemic inflationary shock was at its height, so in April 2023 pensioners received a 10.1 per cent rise when wage growth was only 5.4 per cent. The government did not intervene.
A safety net that works – for now
By the numbers, the triple lock has worked. Since 2011 state pensions have risen by 89 per cent in nominal terms. If they had risen only with inflation, the increase would have been 60 per cent; if only with wages, 66 per cent. The new state pension is now worth about 30 per cent of full-time median earnings. To put that in perspective, if a 66-year-old wanted to buy an annuity that escalated by 2.5 to 5 per cent a year – a proxy for the triple lock – it would cost between £215,000 and £283,000, according to analysis by Jonathan Guthrie in the Financial Times. The median level of private pension wealth for the 65-74 age band is £146,000. Unsurprisingly, the state pension makes up the bulk of poorer pensioners’ income, but the striking figure is that even among the richest fifth of UK pensioners it accounts for almost 30 per cent of single incomes and 16 per cent for couples after housing costs. Only 12 per cent of households rely solely on the state pension, but it is a basic plank of retirement planning for all but the properly wealthy.
Yet the safety net is not as generous as it might appear. Internationally, the UK’s state pension has a low gross replacement rate – the percentage of pre-retirement salary it replaces. Despite the triple lock, around 16 to 17 per cent of UK pensioners still live in relative poverty, a figure that rises for those aged 85 and over. In a 2026 Pension Breakeven Index the UK ranked thirteenth out of 28 European countries, with pension income only 26 per cent above the cost-of-living benchmark, leaving a much smaller buffer than in countries such as Luxembourg, Norway and Spain.
The rising cost and the political inertia
The principal challenge is not whether the triple lock works for pensioners but whether the country can afford it. According to the Office for Budget Responsibility, the triple lock has pushed state pension spending up by £12 billion a year more than if pensions had been uprated solely with average earnings. By 2030 that extra cost is forecast to reach £15.5 billion a year. The Institute for Fiscal Studies estimates the total state pension bill at £146 billion in 2025, and reckons the triple lock could add another £40 billion annually (in today’s terms) by 2050. Spending on the basic state pension currently amounts to about 5 per cent of GDP; the OBR projects that will rise to between 8 and 10 per cent over the next four decades, and to 8-10 per cent of GDP by 2070. The volatility of the current regime has been described as “insane” by Tom Calver in The Sunday Times, because it makes long-term cost projections virtually impossible.
The demographic arithmetic is unforgiving. In 2025 there are 3.5 people of working age for every pensioner. By 2050 that ratio is expected to fall to 2.2, meaning fewer taxpayers to support a growing cohort of retirees. The state pension age is already rising: it will increase from 66 to 67 in stages between April 2026 and April 2028, with a further rise to 68 legislated for between 2044 and 2046, though reviews could accelerate that timetable – any change would require at least ten years’ notice. Raising the age further is contentious: losing a year of state pension hits poorer people hardest because of their lower life expectancy, while wealthier retirees enjoy an indexed pension into their nineties.
Why has the triple lock not been scrapped already? Politicians from all major parties admit it is fiscally unsustainable once they are safely out of office, but they are terrified of the backlash from the most reliable voting bloc. Until recently Reform UK had pledged to abolish it on grounds of fiscal sustainability, but then U-turned, bringing them into line with Labour, the Conservatives and the Liberal Democrats. The Liberal Democrats say they are proud to have introduced the triple lock and will protect it. The Conservatives have indicated they are “going to look at” means-testing the triple lock, and Labour has not ruled it out. The only party with a modestly sensible reform is the Greens, who propose ending the lock by dropping the 2.5 per cent floor – a policy that draws support overwhelmingly from younger voters, not the elderly.
What could replace the triple lock?
Several alternatives have been floated, none of which commands broad support. Means-testing the indexation would be technically very complex and politically explosive. A more likely reform is a double lock – linking rises to the higher of earnings or inflation, but removing the 2.5 per cent floor. Another is a simple link to earnings alone. Heidi Karjalainen of the Institute for Fiscal Studies has proposed an Australian-style “smoothed earnings link”, where the government sets a permanent target for the pension as a share of average earnings and uprates annually by whichever measure keeps it on track to hit that proportion. The Tony Blair Institute has also proposed replacing the triple lock after 2030 with a smoothed earnings link as part of a broader “Lifespan Fund” model.
Whatever happens, state pensions are likely to become less generous relative to earnings in future. As Jonathan Guthrie has put it: invest what you can and rely on the state as little as possible. “It is big, clumsy and it cares a lot less about your financial wellbeing than you do.”
