The Queensland budget has revealed Brisbane commuters will get discounts on public transport if they buy more than one trip at a time.

The budget shows a $371.1 million spend over four years for a new public transport ticketing system.

In the future, people will be able to use wearable devices, such as smartphones and smartwatches, to buy tickets, along with credit and debit cards.

There is also $8 million dedicated over three years, starting next year, for trials and pilots of the new system.