The new rail line between Edinburgh and the Borders could cost more than twice the original estimate (link below.)
http://news.bbc.co.uk/1/hi/scotland/south_of_scotland/7277768.stm The project's completion date has also slipped from 2011 to 2013, Transport Minister Stewart Stevenson confirmed.
A non-profit making company will be set up to pay for the bulk of the costs - a move criticised by Labour.
Mr Stevenson said the original date put forward was "never achievable", given the decisions taken on the project by the previous Holyrood government.
The capital costs of the railway, between £235m-£295m, are to be funded by a "non-profit distributing vehicle" (NPD), meaning the cash will be borrowed from the financial markets.
It is to be repaid by annual charges met from the budgets of the national agency Transport Scotland, and with contributions from councils.
Despite opposition party concerns, Mr Stevenson insisted it was a cost-effective borrowing method which avoided high interest rates associated with private finance initiatives and would keep the project in public ownership.
The original estimate for the rail link stood at £129m, at 2002 prices, and its final cost will be negotiated during the procurement process.