By political reporter Alexandra Beech.
New figures from the Department of Education show 3,600 families hit the annual cap on the childcare rebate just halfway through the financial year.
The data shows these families used up all their rebate by mid-January, leaving them with no Government support and full fees until the end of June.
The department figures show 94,000 families were expected to reach the cap by the end of the financial year.
The Government is using these figures to ramp up its calls for changes in the sector.
It wants to streamline multiple childcare subsidies into one means-tested payment, with the highest amount going to the lowest-income families.
It also wants to remove the annual cap on the amount of childcare rebate paid to most families, which is currently set around $7,500 per child for each financial year.
For families earning more than $185,000 the annual limit would be increased to $10,000.
The Government has argued those changes should be paid for by cuts to family tax benefits and it has included both moves in its omnibus savings bill.
But that bill looks unlikely to pass the Senate.
Education Minister Simon Birmingham said the new department data showed change was urgently needed.