The estimated revenue from charging teachers for parking will be $8 million to $10 million a year.

This was disclosed in a written reply by Education Minister Ong Ye Kung yesterday. He was responding to a parliamentary question from Workers' Party Non-Constituency MP Leon Perera, who had asked how much revenue will be collected from the parking fees for teachers in schools.

Mr Ong said the revenue will be retained by the schools. There are 360 primary schools, secondary schools and junior colleges in Singapore.

From August, teachers will have to pay for parking at their schools. Outdoor season parking will cost $75 a month during the school term, and $15 a month during the school holidays in June, November and December.

At sheltered carparks, teachers will have to pay $100 monthly during the school term and $20 monthly during school holidays. This will add up to $720 annually for uncovered carparks and $960 for sheltered ones.

The carpark rates were imposed in line with the Public Service Division's "clean wage" policy, which stipulates that salaries are fully accounted for, with no hidden perks and privileges.

The move comes after a review of free parking in schools started in 2015 by the Ministry of Education.

An Auditor-General's Office report had in the same year faulted some educational institutions for allowing their staff to park for free, or at fees below the market rate.

Such practices "are tantamount to providing hidden subsidies for vehicle parking", it said in the annual report of financial lapses in public-sector bodies.

All five polytechnics and the Institute of Technical Education started charging for parking on their premises in October last year.