Pay gap reporting has been mandatory in the UK for companies with 250+ employees since 2017. After nearly a decade of disclosure, the actual movement in the headline numbers has been disappointingly small — but the picture beneath the headline is more nuanced.
Where the data sits in 2026
UK median gender pay gap (full-time employees only): 7.7% (2024 ONS data), down from 9.0% in 2017. All employees including part-time: 13.1%, down from 17.3%. The all-employees figure includes part-time workers, where women are disproportionately represented — driving most of the gap.
What's actually changed
Transparency. Companies must publish their gaps and explain remediation plans. Some companies have closed gaps significantly through structural changes. Pay discrimination at point of hire has reduced. Discussion of pay between colleagues is more normalised.
Sector specifics: finance and tech sectors still have the largest gaps despite high-profile commitments. Public sector and education have closed gaps faster than private sector.
What hasn't changed
Career-track penalties for maternity leave. Mothers continue to face significant lifetime earnings penalty (roughly 30% over career). The 'motherhood penalty' is now the dominant driver of the gap, more than direct discrimination.
Underrepresentation in senior positions. CEO and board-level female representation has crept upward but slowly. UK FTSE 100: 12 female CEOs in 2026, up from 7 in 2017. Material progress, still far below parity.
Sector concentration. Women remain concentrated in lower-paid sectors (caring, retail, hospitality, education) regardless of qualifications.
What evidence-based interventions have worked
Shared parental leave used by partners (not just mothers). Countries with non-transferable paternity leave (Sweden, Iceland) see smaller motherhood penalties. Pay transparency policies. When salary ranges are public, gaps close faster. Salary negotiation policies that limit negotiation entirely (set salary bands without individual negotiation). Some tech companies eliminated salary negotiation entirely and saw within-firm gaps drop.
The pay gap has narrowed but is not closing on the timeline current policies imply. Structural fixes (parental leave, pay transparency, career-track flexibility) move the needle; awareness campaigns alone don't.