An economic forecasting company from the UK has been employed to help Guernsey prepare for major tax reforms. This year the States will debate whether to abolish corporation tax in 2008 to keep the island attractive to offshore investment companies.
But if the plans go ahead an estimated �48m will have to be raised through other taxes and charges.
Oxford Economic Research Associates (Oxera) says it can complete its assessment by the end of February.
It will report to a panel under the leadership of former Deputy John Roper.
The company has previously advised Jersey on the same issue.