Commuters and poker machine punters and venues will be slugged by the Napthine government to help the Coalition rake in more money in the face of declining revenues ahead of next year's state election.

Weekend fares on public transport will nearly double among a range of price rises, while motorists will be hit with a widened congestion tax driving up the cost of inner-city parking. From Brunswick to St Kilda, the government will charge $950 for each parking space, with a higher charge in the CBD.

Weekend fares on public transport will nearly double under the Napthine government's plan to increase revenue. Credit:Wayne Taylor

Punters will face increased losses from poker machines, with the government to allow venues to tweak their machines to reduce the minimum return to players from 87¢ in the dollar to 85¢. Tax rates for hotels and clubs will rise.

The government is on track to deliver a modest surplus next May, with Treasurer Michael O'Brien saying a $221.8 million surplus is expected. He also says it will grow to $2.7 billion in 2016-17.