The deal jointly proposed by the center-right CDU, whose leader Friedrich Merz is likely Germany's next chancellor, and center-left Social Democrats also calls for a €500 billion special fund for infrastructure spending.

Germany's Greens may refuse to back plans by likely next chancellor Friedrich Merz for a massive increase in state borrowing, with a party source on Monday warning "approval is becoming less likely with each passing day".

Germany's chancellor-in-waiting and leader of the Christian Democratic Union party (CDU) Friedrich Merz speaks during an extraordinary meeting of the German Bundestag to discuss a €500-billion infrastructure fund and a revamp of borrowing rules aimed at modernizing the military and stimulating economic growth ahead of the formation of a new parliament at end of March,

German conservative leader Friedrich Merz reached a tentative agreement with the Green party on a debt-funded spending package for defense and infrastructure, people familiar with the discussions said.