The average Opal fare that passengers pay for using NSW's public transport has risen by 10 per cent since an overhaul of ticketing just over a year ago, delivering revenue of about $30 million a week to the state government, internal figures show.

While a regulated fare rise in July was kept to inflation, the figures obtained by the Herald under freedom of information laws show commuters have actually paid more for their travel since the changes to the fare structure in September 2016.

The average Opal fare has risen by 10 per cent to $2.37, from $2.16 in the five weeks before passengers' entitlement to free travel after eight paid journeys in a week was replaced with half-price fares. The increase in the average fare includes the 2.4 per cent rise imposed by the government on July 3.

In the three weeks to November 19 – the most recent period for which figures were released – the government collected an average of almost $30 million a week, a 16 per cent rise on the weeks immediately before the fare structure overhaul.