CANBERRA, Nov 12 - Analysis from the Federal Department of Education and Training has pinpointed the areas in Australia most impacted by the government changes that will result in the greatest benefits going to middle-income families in the workforce.

"The hardest working lower income Australian families will get the biggest benefits from the changes," Education Minister Simon Birmingham told Nine News on Sunday.

"The only families who miss out on getting support are families on high incomes or people who aren't meeting the activity test of working, studying or volunteering."

Close to one million families will benefit from the government's additional $2.5 billion investment and increased subsidy, new hourly rate cap and the end of the $7,613 annual rebate cap.

More than one million Australian families are expected to access childcare support next year.

The analysis predicts the changes will encourage 230,000 families to increase their involvement in the workforce.

"As long as you are a family in the work force and earning a middle income, you will see extra support," Birmingham said.

In NSW, the electorates of Greenway, Parramatta, Lindsay and Dobell will see the most families benefit from the changes.

Victoria's electorates of Lalor, McEwen, Holt and Gorton stand to receive the greatest impact, while Forde, Rankin, Fadden and Petrie are the equivalent areas in Queensland.

Pearce in Western Australia, Kingston in South Australia, Franklin in Tasmania, Solomon in the Northern Territory and Fenner in the Australian Capital Territory are further high flyers.

"Across the mortgage belts of Australia, hard-working families will be able to breathe a little easier, knowing that more support for childcare fees is just around the corner," Birmingham said in a statement.