The £127,000 Gap No One's Talking about Properly: Why the UK pension system is still failing women

There are some numbers that should stop you mid-sentence.

£127,000 is one of them.

That is the average gap between what men and women retire with in the UK. Not a rounding error. Not a marginal difference. A structural divide that has been quietly widening for over a decade.

New data from Mercer, working alongside now pensions and the Pensions Policy Institute, puts it in plain terms. By the time retirement hits, the average woman has around £105,000 in pension savings. The average man has £232,000.

That is not a gap. That is a different reality.

And it has been building in plain sight since the introduction of auto-enrolment in 2012. A policy designed to bring more people into pension saving has done exactly that, pulling over 22 million workers into the system. On the surface, it looks like progress.

Underneath, it tells a more complicated story.

Because the system was not built evenly.

To qualify for auto-enrolment, you need to earn at least £10,000 a year in a single role. Contributions also only begin after the first £6,240 of earnings. On paper, these thresholds make sense. In practice, they exclude the very groups most at risk of falling behind.

Women are far more likely to work part-time. And nearly four in five of those women earn below the £10,000 threshold. For men, that figure sits at just 9%.

So before the system even begins to work, many women are already outside of it.

Layer on top the gender pay gap, career breaks, and longer life expectancy, and the outcome becomes predictable. Women retire with less, live longer, and stretch smaller savings over more years.

By the time people reach their seventies, the divide deepens further. Among those aged 75 and above, the pension gap rises to around 74%.

It is not subtle. It is cumulative.

“If these measures had been in place from the start, women would have built up an additional £7.7 billion in pension savings,” says Patrick Luthi, Mercer UK’s Head of DC Product and CEO of now:pensions.

That figure lands differently. Because it reframes the issue. This is not just about individual behaviour or financial awareness. It is about system design.

Joanne Segars, Chair of the now:pensions Trustee Board, describes the gap as “hiding in plain sight.” And that is exactly how it has survived this long. Not ignored, but never fully confronted.

The proposed solution is not radical. Remove the £10,000 earnings trigger. Scrap the lower earnings limit. Bring more people, particularly women, into the system earlier and more consistently.

According to the data, that shift alone could add 726,000 more women into pension saving, unlocking up to £218 million in annual contributions.

But even that comes with caveats. Affordability. Timing. The broader impact on lower earners. This is not a simple fix. It is a necessary one.

Because what sits at the centre of this is not just policy. It is outcome.

Men retire with an average private pension income of £17,846 a year. For women, it drops to just over £6,000. At the same time, women are expected to live longer, spending more years in retirement with less to live on.

It is the kind of imbalance that does not announce itself loudly. It builds slowly, year by year, until it becomes impossible to ignore.

Auto-enrolment changed the conversation once. It brought millions into the system.

Now the system itself needs to catch up.

Because if the goal is financial security in later life, the current model is only working for half the population.