The research is based on Office for National Statistics (ONS) figures analysed by age and sector.
It reveals the average salary for senior managers and directors between 40- and 49-years-old is £67,232. For employees at a similar level aged 50- and 59-years-old, it drops down to £63,565.
Average earning power only rises after 50 in three sectors – teaching, healthcare and secretarial. For all three areas salaries are the highest for employees over 60-years-old.
Healthcare professionals 60 or older earn on average £50,418, compared to £44,298 in their 40s.
The average salary across all sectors peak at £33,459 between 40 and 49. This drops off to £33,059 at 50 and £31,059 at 60.