New research has revealed Brisbane motorists are paying the highest rates for short-term CBD parking in the country.

The RACQ's annual parking report revealed half hour and hourly rates were far more expensive in the river city than in Sydney or Melbourne.

The average hourly rate is $28.71 for an hour or $16.98 for 30 minutes, nearly double the cost in Melbourne and 37 per cent more than Sydney.

While on-street parking rates were much cheaper, the RACQ feared that was part of the problem.

"People are electing to try and get those elusive on-street parks and they're circling and causing congestion," RACQ’s Rebecca Michael told the ABC.