Fiscal councils can improve the sustainability of public finances. They can increase transparency and accountability of fiscal policymaking by providing unbiased information to the public and stakeholders in the budget process. The design of their mandates, independence, and their public role are key conditions determining effectiveness. The new European Advisory Fiscal Board (EAFB) can be a valuable addition but is unlikely to be a game changer. Far-reaching reforms on the Union’s fiscal framework remain contingent on political will. Independence is crucial for fiscal councils to have an impact. This holds for both the EAFB and national fiscal councils. In addition, cooperation between the new EAFB and national bodies is a necessary requirement for a “European System of Fiscal Boards” to work effectively.