The Abbott Government is conceding welfare cuts unveiled in the May budget are unlikely to be introduced in time for their slated starting date of July 1.

Social Services Minister Kevin Andrews told AM that welfare payments to millions of Australians - seniors, families and the unemployed - would continue for now, unchanged.

Mr Andrews said the changes, which include income and assets test thresholds for family tax benefits, and changes to unemployment benefits and Youth Allowance, would most likely be introduced to the Senate in July when the new Senate sits.

Legislation for other budget measures, such as the proposed GP co-payment or university fee deregulation, also has not been seen.

The Government announced in May it wanted to withhold unemployment benefits from under-30s for up to six months in a bid to prevent young people becoming entrenched on welfare and provide greater incentive to find work.

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The proposed changes to Family Tax Benefit Part B is set to save the government $1.9 billion by cutting the payment to families when their youngest child turns six.

Family tax benefit changes $7.5 billion in budget cuts to Family tax benefits

$7.5 billion in budget cuts to Family tax benefits Freezing FTB payments for two years from July 1, 2014 will save $2.6 billion over four years

Freezing FTB payments for two years from July 1, 2014 will save $2.6 billion over four years Limiting the FTB-B to families with children under six will save $1.9 billion from July 1, 2015

Limiting the FTB-B to families with children under six will save $1.9 billion from July 1, 2015 Dropping the primary earner income limit for FTB-B from $150,000 to $100,000 will save $1.2 billion over four years from July 1, 2015

Dropping the primary earner income limit for FTB-B from $150,000 to $100,000 will save $1.2 billion over four years from July 1, 2015 Freezing eligibility thresholds for all government payments for three years from July 1, 2014 will save $1.5 billion over four years

Freezing eligibility thresholds for all government payments for three years from July 1, 2014 will save $1.5 billion over four years Cutting the FTB-A large family supplement from July 1, 2015 will save $377.7 million over four years

Cutting the FTB-A large family supplement from July 1, 2015 will save $377.7 million over four years Cutting an add-on for additional children to the higher income-free threshold will save $211 million over four years from July 1, 2015

Cutting an add-on for additional children to the higher income-free threshold will save $211 million over four years from July 1, 2015 Trimming the end-of-year supplements and ceasing indexation from July 1, 2015 will save $1.2 billion. The payments will be $600 (down from $726) for each child for FTB-A and $300 (down from $354) for each child for FTB-B.

"It's looking unlikely that these measures will get through the Parliament before the 1st of July," Mr Andrews said.

"We will put it to the Senate once we have a new senate in July ... we will continue to press the Parliament to get these measures through.

"Life will go on as it is today until these measures are passed and we will obviously give people a new indication of when the changes will come in once we have some sense of what the Senate might do," Mr Andrews said.

Meanwhile, Prime Minister Tony Abbott will today re-introduce legislation to scrap the carbon tax, which has already been rejected twice by the Senate.

Manager of Opposition Business Tony Burke said the carbon tax was the Government's "trick pony issue" and a diversion from the budget.

"The rationale from the Prime Minister is pretty straight forward on this," Mr Burke said. "This week is anything but the budget, anything other than the pain that they're hitting lower and middle-income people on with this budget."