In the report, the council said it continued to “experience significant financial pressures”.
It is proposing to increase short and long-stay tariffs, introduce Sunday charges, revise the tariff structure at Pin Mill car park in Chelmondiston, and increase season ticket prices.
Tariff increases would start with a 20p rise for one hour to £1.20, up to a 50p rise to £3 for four hours.
Charges at Pin Mill would double for some visits – two hours would increase to £1.20 from 60p.
The council said it would standardise parking across all its car parks between 08:00 and 18:00 every day, including bank holidays.
In September, it said there had been more visitors despite the introduction of the charges.
The latest proposed changes will be discussed at a cabinet meeting on Tuesday.