From budget crisis to special fund: the remaking of Germany's public finances
The 2023 Karlsruhe ruling, the end of the traffic-light coalition and the 2025 constitutional amendment: a detailed analysis of how Germany's debt rules changed.
The debt brake has been enshrined in Germany's Basic Law since 2009, limiting the federal government's structural new borrowing to 0.35 percent of GDP. Between 2023 and 2025 it became the centre of arguably the most important fiscal dispute in decades.
The Karlsruhe ruling
On 15 November 2023 the Federal Constitutional Court declared the Second Supplementary Budget Act 2021 void. The government had shifted €60 billion in unused pandemic borrowing authorisations into the Climate and Transformation Fund. The court found this breached the debt rules, including the principles of annuality.
Budget gaps and coalition collapse
The ruling tore a large hole in fiscal planning. The SPD, Greens and FDP coalition had to rework the 2024 budget fundamentally. The dispute over the 2025 budget contributed significantly to the coalition's collapse in November 2024, leading to early elections in February 2025.
The 2025 constitutional amendment
In March 2025 the outgoing Bundestag passed a constitutional amendment with the required two-thirds majority, approved by the Bundesrat. Key points: a €500 billion special fund for infrastructure and climate neutrality, including €100 billion for the Climate and Transformation Fund; an exemption of defence spending above 1 percent of GDP from the debt brake; and limited borrowing room for the federal states.
Assessments
The Bundesbank had earlier backed a moderate, stability-oriented reform. Economists were divided: supporters saw a chance to clear the investment backlog in bridges, rail and digital networks; critics warned of rising interest burdens and the risk of funds flowing into consumption.
The European level
Reformed EU fiscal rules took effect in 2024, focusing on multi-year, country-specific expenditure paths. The Commission also allowed a national escape clause for higher defence spending. Germany must align its fiscal policy with these rules.
What it means for companies
For construction, infrastructure and defence firms, the special fund opens up substantial order potential over many years. Much depends on how fast planning and permitting proceed and whether construction capacity suffices.
Assessment
In less than eighteen months German fiscal policy changed fundamentally – from a strict reading of the debt brake to much greater investment room. The ruling and legal texts are linked below.