The government has also kept the cost of all-day travel for holders of Gold Opal cards capped at $2.50.

In announcing the fare rise, Transport Minister Andrew Constance said commuters could be "guaranteed increases will mirror inflation while ensuring we can continue to provide more services".

"The impact on an average customer is roughly 50¢ a week, and means taking the train, bus, ferry or light rail is still a much cheaper option than driving," he said.

Last year, the state's pricing regulator recommended the government increase overall public transport fares by an average of 4.2 per cent annually over a three-year period, well above the current rate of inflation.

But Mr Constance said it was important price shocks were not too drastic for commuters and the changes in Opal fares from July 3 was a "modest increase".

Last year he announced a freeze on fares until this July and kept in place existing fare bands for the state's Opal ticketing system. It helped offset opposition to the government ending from last September passengers' entitlement to free travel on public transport after eight paid journeys in a week, which was replaced with half-price fares.

Despite the latest changes, Adult Opal card holders will still gain a $2 "transfer discount" when they switch modes of transport within an hour, while holders of Child and Youth, and Concession cards will retain a $1 discount.

The Independent Pricing and Regulatory Tribunal has estimated that only a quarter of the cost of providing public transport is covered by customers, while the remainder is from taxpayers.