Advisory, Conciliation and Arbitration Service
Advisory, Conciliation and Arbitration Service has submitted data every year since 2017. 2 of 9 submissions were filed after the deadline.
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Last submission received on Monday, 15 Dec 2025 at 16:27 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 3.6%
Submitted on Monday, 15 Dec 2025 at 16:27 UTC.
In this organisation, women earned 100p for every £1 that men earned when comparing median hourly pay.
Women's median bonus pay was 16.7% higher than men's.
Women made up 56.0% of the highest paid quarter and 60.0% of the lowest paid quarter.
Pay quartile breakdown
2024 Mean pay gap 3.5% Late submission
Submitted on Wednesday, 23 Apr 2025 at 14:08 UTC.
In this organisation, women earned 99p for every £1 that men earned when comparing median hourly pay.
Women made up 56.0% of the highest paid quarter and 62.0% of the lowest paid quarter.
Pay quartile breakdown
2023 Mean pay gap 5.7%
Submitted on Thursday, 14 Dec 2023 at 14:36 UTC.
In this organisation, women earned 99p for every £1 that men earned when comparing median hourly pay.
Women made up 49.0% of the highest paid quarter and 60.0% of the lowest paid quarter.
Pay quartile breakdown
2022 Mean pay gap 7.2%
Submitted on Monday, 1 Aug 2022 at 13:15 UTC.
In this organisation, women earned 94p for every £1 that men earned when comparing median hourly pay.
Women's median bonus pay was 9.9% lower than men's.
Women made up 48.2% of the highest paid quarter and 62.8% of the lowest paid quarter.
Pay quartile breakdown
2021 Mean pay gap 7.3%
Submitted on Thursday, 13 Jan 2022 at 13:51 UTC.
In this organisation, women earned 99p for every £1 that men earned when comparing median hourly pay.
Women's median bonus pay was 11.1% lower than men's.
Women made up 49.0% of the highest paid quarter and 60.2% of the lowest paid quarter.
Pay quartile breakdown
2020 Mean pay gap 6.8%
Submitted on Tuesday, 19 Jan 2021 at 13:15 UTC.
In this organisation, women earned 88p for every £1 that men earned when comparing median hourly pay.
Women's median bonus pay was 11.1% lower than men's.
Women made up 45.9% of the highest paid quarter and 54.3% of the lowest paid quarter.
Pay quartile breakdown
2019 Mean pay gap 7.4%
Submitted on Monday, 6 Jul 2020 at 13:29 UTC.
In this organisation, women earned 88p for every £1 that men earned when comparing median hourly pay.
Women's median bonus pay was 17.5% lower than men's.
Women made up 47.2% of the highest paid quarter and 55.1% of the lowest paid quarter.
Pay quartile breakdown
2018 Mean pay gap 6.4% Late submission
Submitted on Tuesday, 19 Jan 2021 at 13:29 UTC.
In this organisation, women earned 90p for every £1 that men earned when comparing median hourly pay.
Women's median bonus pay was 26.0% lower than men's.
Women made up 46.9% of the highest paid quarter and 60.4% of the lowest paid quarter.
Pay quartile breakdown
2017 Mean pay gap 7.1%
Submitted on Wednesday, 6 Sept 2017 at 06:53 UTC.
In this organisation, women and men earned the same median hourly pay.
Women made up 48.3% of the highest paid quarter and 62.4% of the lowest paid quarter.
Pay quartile breakdown