MPs are to be asked to agree to an earlier sitting of the House of Commons next Tuesday, so the Budget can be held at the earlier time of 1230 BST.
Leader of the Commons Sir George Young has put down a motion that the day's business begins three hours early for a Tuesday, at 1130 BST.
This would mean that after an hour of ministerial questions Chancellor George Osborne would deliver his first Budget.
Mr Osborne had been expected to start speaking at 1530 BST.
The Tories pledged before the election to hold a Budget within 50 days of coming to power to show their intention to get to grips with the deficit.