For private operations there is no limits only your medical.
For commercial operations it's 65 and over 60 one pilot has to be under 60
With the retirement age moving higher with the new 60s becoming the old 50s and people being healthier and living longer it seems an archaic attitude which wouldn't stand up well in the EU courts of human rights and age discrimination!
Especially when governments are encouraging people to carry on working into their 70s if they wish and protecting their rights to do so
Pace