The UK gender pay gap is not constant across a working life. ONS data for 2025 shows that the full-time hourly pay gap is very small among workers aged 22 to 29 and becomes much wider in older age groups. The published figures are 0.9% for ages 22–29, 3.9% for 30–39, 9.1% for 40–49, 12.5% for 50–59 and 12.6% for workers aged 60 and over. That pattern is important for recruiters and employers because it shows that a single national pay-gap figure can hide major differences by age. It also needs careful interpretation: the gender pay gap is not the same thing as an equal-pay test between two people doing the same job. It is an aggregate comparison across the workforce, affected by occupation, seniority, hours, career breaks and many other factors.
The age profile shows a clear widening pattern
The most striking feature of the ONS age breakdown is the distance between younger and older full-time workers. At ages 22 to 29, the gender pay gap is 0.9%, close to parity in aggregate terms. By ages 30 to 39, it rises to 3.9%. It then more than doubles to 9.1% for ages 40 to 49 and reaches 12.5% for ages 50 to 59.
The figure for workers aged 60 and over is 12.6%, broadly similar to the 50–59 group. This suggests that the largest widening occurs through the middle stages of working life rather than continuing indefinitely with age.
For recruiters, the advantage of the age breakdown is that it makes the aggregate pay gap more interpretable. A national full-time gap of 6.9% does not describe every part of the workforce equally well. The disadvantage is that age groups still contain many different occupations, sectors and career histories.
The data therefore identifies where gaps are larger, but not why they are larger. It should be used to focus questions rather than to assign a single cause.
That distinction matters because a simple age trend can otherwise invite overconfident explanations. The statistics show association, not a complete causal model.
Career progression and occupational mix can widen the gap
One plausible reason aggregate pay gaps become larger with age is that career paths diverge over time. Senior roles tend to pay more, and representation in those roles can differ by gender. ONS occupational data provides some supporting context.
For professional occupations, the median hourly pay figure cited in the study pack was £20.54 for ages 22–29 and £28.76 for ages 50–59, a difference of £8.22 or roughly 40%. At the same time, women represented 52% of professional workers aged 22–29 but 42.7% of those aged 50–59.
Those figures do not prove that falling female representation causes the age-related pay gap. They do show why progression and occupational structure deserve attention. If higher-paid senior positions are distributed differently across groups, the aggregate pay gap can widen even without direct unequal pay for identical work.
For employers, the benefit of examining progression is that it points towards practical interventions: promotion processes, leadership pipelines, return-to-work support and access to development opportunities.
The drawback is that occupational averages can still hide differences within roles. A good analysis should therefore combine aggregate patterns with internal job-level and grade-level data rather than treating the national statistics as a diagnosis of one employer.
Career breaks and working patterns complicate the interpretation
Age also captures life-stage differences. Career breaks, caring responsibilities and changes in working hours can affect earnings trajectories. Women are more likely than men to experience some forms of career interruption or reduced hours associated with caring, although the exact effect varies by household, occupation and individual circumstances.
These patterns can influence promotion timing, accumulated experience and access to roles that reward continuous tenure or long working hours. Over many years, relatively small differences can compound into larger average pay gaps.
The advantage of recognising life-stage effects is that it shifts the discussion beyond starting salary. Employers may have strong entry-level pay equality but still develop wider gaps later if progression systems are inflexible or if returning workers face barriers.
The disadvantage is that broad explanations can become stereotypes if applied to individuals. Not every woman has caring responsibilities, not every man has uninterrupted employment, and personal career choices vary widely.
Recruiters and employers should therefore treat life-stage factors as population-level context, not assumptions about candidates. The practical focus should remain on transparent pay bands, flexible progression routes and fair access to opportunities.
Why the national pay-gap measure is not an equal-pay test
This distinction is essential. The gender pay gap compares average or median earnings across groups. Equal pay law concerns whether men and women receive equal pay for equal work or work of equal value, subject to the legal framework.
An employer can have a gender pay gap even if every man and woman in the same role and grade is paid identically, simply because more men occupy higher-paid positions. Conversely, a small aggregate pay gap does not prove there are no unequal-pay issues within particular jobs.
For recruiters, the benefit of understanding this distinction is accuracy. It prevents the misuse of national statistics in hiring discussions and helps employers focus on the right questions.
The drawback of the headline gap is that it is easy to communicate but easy to oversimplify. A single percentage can attract attention while hiding the distribution of occupations, grades, hours and seniority underneath.
A stronger employer analysis therefore separates three questions: are people in comparable roles paid fairly, are men and women represented similarly across grades, and do progression patterns differ over time?
What employers and recruiters should do with the age pattern
The age profile suggests that pay equity should be monitored as a career-lifecycle issue rather than only at entry. Employers should look at hiring salaries, promotion rates, access to leadership roles, return from career breaks, part-time progression and retention by age and gender.
Recruiters can support this by using clear salary ranges, reducing unnecessary reliance on previous salary, and challenging vague requirements that may exclude candidates with non-linear careers. They can also help clients distinguish between a market salary benchmark and internal pay equity.
The benefit of acting on the age pattern is that it addresses structural issues before they become larger. The drawback is that interventions can become superficial if they focus only on headline percentages without examining job architecture and progression.
The ONS data does not tell every employer what its internal problem is. It does show where national gaps are most pronounced. That makes it a useful benchmark and a prompt for deeper investigation.
The clearest conclusion is that the full-time gender pay gap is small among workers in their twenties and much wider in later age groups. Employers should not interpret that as proof of one cause. They should interpret it as evidence that career progression, representation and working patterns deserve sustained attention across the whole employment lifecycle.
Source: ONS, Gender pay gap in the UK: 2025.