This time next week, those who park their vehicles at Perth train stations will be paying for it.

Paid parking at Transperth parking bays at train stations begins July 1, with a flat fee of $2 a day introduced, no matter whether cars are parked for an hour or all day.

Train commuters will now have to pay for parking.

The only exception are those using disabled parking bays.

As well as the traditional pay-and-display method, patrons will be able to use their SmartRiders to pay for parking.