IT will cost almost a dollar more to use the Clem7 Tunnel from next month.

RiverCity Motorway Group, which was taken into receivership last month with debts of $1.3 billion, has announced tolls will rise to $3.95 from April 4 - up from $3.

Motorcyclists will pay 45 cents more - $1.95 and light commercial vehicles $6.61.

Heavy commercial vehicles will be slugged $11.66

CEO Flan Cleary said the new toll for cars was still below the maximum $4.40 toll RCM was permitted to charge.

"The Clem7 continues to operate as normal providing motorists with a fast and reliable bypass of the Brisbane CBD," Mr Cleary said.

The number of vehicles using the tunnel has been averaging just under 28,000 vehicles a week, less than half the figure originally forecast by the company.

Originally published as Add another dollar to your Clem7 trip