Southeast Queensland's public transport users will be rewarded with free travel.

Queensland Transport Minister Scott Emerson says commuters who use their electronic Go Card ticket for nine journeys will be allowed to travel by ferry, bus or train for free afterwards.

But the deal only applies from Monday to Sunday.

"That means regular weekday commuters who use their go card to travel to and from work five days a week will get their journey home on Friday and travel across the weekend for free," Mr Emerson said.

The scheme offering free travel after nine journeys each week replaces an existing Labor incentive, which provided free travel after 10 journeys.