COMMUTERS will be able to top up their myki cards on buses from the end of next month.

Old Metcard devices are being removed from all metropolitan buses and replaced with myki equipment. Works are expected finish by the end of April.

The new equipment means passengers can ask their bus drivers to put up to $20 on their myki card.

Public Transport Users Association spokesman Paul Westcott said he was pleased people would finally be able to top up their myki cards on the bus.

"Now Metcard has been turned off, they have to take all the Metcard equipment out of the buses and install the myki console, where the bus driver can put money on the card for people," Mr Westcott said.

"It is a convenient system for most bus passengers because a lot of them don't have access to myki machines or the internet to top up their card," he said.

"This is an important service and we think bus users deserve to have top up facilities."

Public Transport Victoria spokesman Adrian Darwent said there were no plans to introduce top-up machines on trams, or to provide the requested short-term tickets for visitors.