Franklin Greens MHA Nick McKim has proposed spending $10 million a year to give around 17,500 small businesses an annual electricity rebate averaging more than $500 each,

Mr McKim said the state budget had not done enough to support small businesses.

"The Liberals are a government for big business and it is small business that is the engine room of the state's economy," he said.

All businesses employing less than 20 people and working out of their own premises would be eligible for the rebate, Mr McKim said.

Meanwhile, the Denison Greens MHA has proposed spending $50 million to build up to 300 new public houses, and $10 million on energy efficiency upgrades for low income families.

Both proposals would be funded from the $220 million set aside for future infrastructure spending.

Premier Will Hodgman accused the Greens of being financially irresponsible.

"Thankfully, the Greens won't be getting their hands on our budget, as they did with Labor, because the result of that was $1.1 billion in deficits," he said.

Opposition Leader Bryan Green said his budget reply speech stood in contrast to what he described as a lack of compassion from the state government.

"This week is not about what we could do or might do, it's about what we will do in 2018," Mr Green said.

"Labor has already made significant policy announcements around education, preventative health and infrastructure investment."

Mr Hodgman said it was "lazy" for Labor not to put out an alternative budget.