The government says just one in three people has a private, occupational or workplace pension.
Douglas Central MHK Chris Thomas put a question for written reply to Treasury Minister Alex Allinson about the figures.
Dr Allinson said 33 per cent had claimed tax relief for such pensions in 2023, the last year data was available for.
He added almost 38 per cent of women and 30 per cent of men had declared payments into pensions in their tax returns.
Manx Care doctor survey to be discussed by Tynwald
Weather warning for snow tonight
MHK queries safety at primary school in Ballabeg
Gales put two ferry sailings at risk tonight
Should the Island throw a birthday party for Barry Gibb?
Warning issued over icy roads
High ground could see 4 inches of snow on Saturday night
Mountain Road unlikely to open before Monday