This paper identifies the determinants of macroeconomic forecasts (budget balance, public debt and real GDP growth), of the governments of the 15 EU countries. We have used the forecasts of the Stability and Convergence Programmes submitted between 1998/99 and 2008/09 and the European Commission’s. Results show that, in general, economic growth forecasts submitted by European governments are more optimistic than those published by the European Commission. The lack of accuracy of government forecasts is due to “misinformation” regarding the economic situation at the time of their publication. The differences between observed and forecast changes of budget balance and public debt are explained by the output growth forecast errors and the forecasts of the changes in the two fiscal indicators. These forecast changes tend to revise downwards the changes submitted in the previous Program. Therefore, the governments’ “bad intention” seems to result from their lack of commitment to the objectives of previous programs and it explains the recurrent delays in the implementation of their fiscal consolidation plans.