Restored platforms at Moor Street Station are to open a year earlier than planned following pressure from MPs and Birmingham City Council.
The Edwardian station was refurbished two years ago at a cost of £11 million but Network Rail planned to keep the restored platforms closed until 2007/08, at the earliest.
It led to complaints in the Commons, with MPs demanding they be opened sooner, and Birmingham City Council leader Mike Whitby said waiting until 2007 would be "totally unacceptable".
The Department for Transport has now announced that the platforms are expected to open late next year. Transport Minister Derek Twigg said: "Network Rail and Chiltern Railways have worked closely to accelerate the opening of platforms three and four.
"Currently the timing for their reopening is in late 2006. This date is subject to the creation of a robust construction timetable and completion of the legal processes to allow the terminal platforms to be re-connected with the network."
John Hemming (Lib Dem Yardley) had presented a Parliamentary motion condemning the delay. This was backed by 11 MPs including Andrew Mitchell ( Con Sutton Coldfield).
Mr Hemming said he was delighted action had been taken. "It was always ridiculous to spend so much money refurbishing the platforms and then not to use them."
More than 45,000 people travel through Moor Street each year but have to use adjoining throughplatforms on the Snow Hill line, and walk several hundred yards to the original station.
Funding from the Birmingham Alliance and Chiltern Railways is also set to pay for a new cafe-bar, passenger footbridge, lifts and waiting area.