MELBOURNE commuters are getting ripped off by the cost of monthly tickets compared with daily fares, a public transport lobby group says.

Public Transport Users Association research shows that comparing the cost of monthly public transport tickets with daily fares in 16 cities around the world, Melburnians are paying too much.

''Monthly tickets are out of whack with what other cities are charging,'' association president Daniel Bowen said.

In other cities they will give you a very good discount … in Melbourne you do get a slight discount but it is not a compelling one.''

Using an average of daily tickets available in Melbourne, the association calculated a monthly ticket was priced the same as 20 daily tickets.