The consumer group says Qantas' credit card surcharges may be costing travellers $100 million more than the airline pays to process the payments.

The Reserve Bank of Australia Payments System Board meets today and is expected to introduce new surcharge limits designed to limit excess rip-offs.

"Our analysis shows that the Qantas group may be charging consumers at least $100 million more each year than it needs under the guise of covering processing costs," Matt Levey, Choice head of campaigns, says.

Qantas charges $7.70 for credit card payments on domestic bookings and $30 for credit card payments on international flights.