More than two-thirds of Sydneysiders will end up paying more for their weekly commutes on public transport, analysis of a proposed overhaul of fares claims.

The Independent Pricing and Regulatory Tribunal has recommended sweeping changes to the fare structure for the state's Opal ticketing system. It wants to halt the common practice of commuters taking short, unnecessary trips early in the week in order to later qualify for free journeys that would otherwise be more expensive and longer.

In releasing its draft report just before Christmas, the tribunal said the proposed changes would result in more than 60 per cent of passengers paying less in 2016 for using public transport.

However, an analysis of more than 12,000 journeys by comparison service Finder reveals 68 per cent of Sydney commuters would be charged more for their weekly trips.