THE INSTITUTION OF OCCUPATIONAL SAFETY AND HEALTH
THE INSTITUTION OF OCCUPATIONAL SAFETY AND HEALTH has submitted data every year since 2021, with all 5 submissions on time.
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Last submission received on Thursday, 2 Apr 2026 at 20:23 UTC.
Overall workforce composition
Deviation from a 50:50 gender split, averaged across all four pay quartiles per year. 0% represents an equal split of men and women; positive values mean more women, negative means fewer women.
Hourly pay gap over time
Positive values indicate women's hourly pay is lower than men's by that percentage. A value of 0 indicates equal pay; negative values indicate women earn more.
Pay quartile breakdown
Each band shows the percentage of that quartile that is male vs female.
Lower quartile bottom 25% of earners
Lower-middle quartile 25–50th percentile
Upper-middle quartile 50–75th percentile
Top quartile top 25% of earners
Bonus pay
Percentage of each gender who received a bonus payment.
Bonus pay gap — positive values indicate women's bonus pay is lower than men's.
Year by year
Each year's submission in full. Most recent year shown first.
2025 Mean pay gap 9.9%
Submitted on Thursday, 2 Apr 2026 at 20:23 UTC.
In this organisation, women earned 88p for every £1 that men earned when comparing median hourly pay.
Women's median bonus pay was 33.5% higher than men's.
Women made up 59.7% of the highest paid quarter and 67.2% of the lowest paid quarter.
Pay quartile breakdown
2024 Mean pay gap 13.2%
Submitted on Thursday, 3 Apr 2025 at 22:45 UTC.
In this organisation, women earned 85p for every £1 that men earned when comparing median hourly pay.
Women made up 56.3% of the highest paid quarter and 80.0% of the lowest paid quarter.
Pay quartile breakdown
2023 Mean pay gap 14.1%
Submitted on Monday, 1 Apr 2024 at 21:54 UTC.
In this organisation, women earned 86p for every £1 that men earned when comparing median hourly pay.
Women made up 55.8% of the highest paid quarter and 86.5% of the lowest paid quarter.
Pay quartile breakdown
2022 Mean pay gap 8.2%
Submitted on Tuesday, 28 Mar 2023 at 13:25 UTC.
In this organisation, women earned 87p for every £1 that men earned when comparing median hourly pay.
Women made up 57.1% of the highest paid quarter and 79.2% of the lowest paid quarter.
Pay quartile breakdown
2021 Mean pay gap 12.1%
Submitted on Friday, 1 Apr 2022 at 08:43 UTC.
In this organisation, women earned 83p for every £1 that men earned when comparing median hourly pay.
Women made up 53.8% of the highest paid quarter and 81.3% of the lowest paid quarter.
Pay quartile breakdown