Executive director David Cresswell, a former head of communications and director of strategy, left the service last year with a pay off of £137,202.
Fellow chief operating officer Chris McDermott was also made redundant last year with a package of £141,500. His redundancy package mean he was the highest paid director for the year with a package of just over £350,000.
Redundancy payments for the 12 months ending in March 2020 showed a rise from £2.7m to £3.1m.
Figures in the report showed that the total number of staff made redundant in 2019/20 was 128 compared to 116 the previous year. In the past two years the FOS has made 244 staff redundant.
The annual report shows that chief executive Caroline Wayman received a remuneration package of £306,841, a slight increase on the previous year.
The report also reveals that two executive team members enjoy salary packages in excess of £200,000 per annum with three others just under £200,000.
Fees to board directors have been mostly frozen since 2012.
Overall staff costs fell from £159m to £149m as the impact of job cuts kicked in although there was a growth in the cost of contractor and temporary staff from £62m to over £69m.
Total average monthly staff numbers fell from 2,921 to 2,785.
FOS running costs rose from £270m to £276m and the FOS had a deficit of £33.5m after tax (£41m in 2018/19).
The report also reveals that the FOS workload has nearly halved from over 500,000 complaints received a year in 2013/14 to 273,000 last year, mostly due to a decline in PPI complaints.
Investment and pensions complaints formed 29% of the total and there was a rise in complaints about SIPPs including “disputes about due diligence.”
There were 1,558 complaints about Claims Management Companies, a new area for the FOS.
There have been some Covid-19 related complaints, the FOS said, but so far not a “significant” number.