Public transport patrons paying their bus fare in cash will be charged up to 20 cents more from January 20.
Fares for MyWay smart card holders will increase 2.6 per cent on the same date, Transport Canberra announced on Thursday.
The slight price increase means MyWay users will pay $3.14 for a week day single trip compared to $3.06 in 2017. Student and concession fares will rise from $1.53 to $1.57.
Patrons paying in cash will pay $4.90 for a single trip (including a 90 minute transfer) and $9.40 for a daily fare, up 10 cents and 20 cents respectively.
Seniors and concession card holders using MyWay cards will continue to travel free in off-peak periods while that initiative is reviewed.
The price increase will increase revenue by $500,000 this financial year.
Transport Canberra operations executive director David Matthews said the fares were competitive against the price of parking in Civic or the Parliamentary Triangle.
"I encourage Canberrans to consider using MyWay cards, as discounts apply to cardholders as well as monthly and daily fare caps," he said.
Canberra Liberals leader Alistair Coe accused the ACT government of failing to give notice of the fare increases until after they were raised by his party.
"The government is either very sloppy in notifying people or it hoped to sneak through the changes without telling people," he said.
"Regardless, it's pretty ordinary."
The ACT government will this year expand the Rapid bus network, with projected investments in new buses, the development of a third bus depot in Woden, extra services for some growing areas and upgrades to bus shelters.