Community Services Minister Linda Burney says an economic impact analysis has found fees will rise by $1 to $4 a day.
Children fees will rise by up to $4 a day under a new staffing ratio to be introduced next year, the New South Wales government says.
Ms Burney says an independent survey has found more than a third of children centers already operate at a 1:4 ratio.
Our discussions with parents have found and they believe that the quality their children will get will outweigh the extra cost that comes with it, she said.
The change from the current ratio of 1:5 is being introduced ahead of a national January 2012 deadline but one year later than originally announced.
Ms Burney says that changes have been delayed to give the industry and parents time to prepare.
All center- based and mobile children's services will have to employ one staff member for every four children in care aged or under from January onwards.