Is a majority vote of a quorum of the municipal governing body sufficient to adopt the annual municipal budget?
Yes, unless a local ordinance provides
otherwise. No extraordinary vote is required to formally adopt the
annual budget. However, after the budget has been adopted, a two-thirds
vote of the entire membership of the governing body (not just those
attending and voting) is necessary to effect any change in the budget
(i.e., the amount of the tax to be levied or certified, the amounts of
the various appropriations and the purposes for such appropriations
stated in the budget). Wis. Stat. sec. 65.90(1) and (5).