Ontario's opposition parties are telling the Liberal government to reject a call to drastically cut insurance payouts for serious car-crash injuries.

The Financial Services Commission of Ontario is recommending that medical and rehabilitation costs for non-catastrophic injuries be capped at $25,000, down from the current $100,000.

NDP Leader Andrea Horwath said slashing benefits without cutting car insurance premiums is a bad deal for motorists.

Horwath said the insurance industry made a profit of 7.5 per cent last year, and should not be allowed to offset its losses on financial markets on the backs of Ontario drivers.

The Progressive Conservatives failed to get the government to extend Friday's deadline for public comment on the proposed changes.

Finance Minister Dwight Duncan said he wants to strike the right balance when he follows up on all 39 recommendations for changing car insurance.

Duncan said a decision will be made by June, but he wouldn't speculate on whether the government intends to accept or reject any of the recommendations.

Someone with a catastrophic injury would not be affected by the recommended changes and would remain eligible for up to $1 million for rehab costs.