The vote in the Bundesrat, which represents Germany's 16 states, is the last major hurdle the package has to clear before being signed into law, unleashing billions of euros into an economy that has contracted for two consecutive years.

Germany's parliament approved plans for a massive spending surge on Tuesday, throwing off decades of fiscal conservatism in hopes of reviving economic growth and scaling up military spending for a new era of European collective defence.

Germany's would-be next chancellor, Friedrich Merz, won lawmakers' approval to loosen strict debt rules for higher defense spending as doubts mount about the strength of the trans-Atlantic alliance.