Mainz's €1.1 billion budget plan rejected as regulators demand cuts
Mainz Receives Another Financial Blow as Supervisory Authority Slashes Budget Plans
Last week, the city of Mainz once again suffered a harsh rebuke for its financial planning from the supervisory authority ADD (Aufsichts- und Dienstleistungsdirektion), leaving Mayor Nino Haase (independent) and Finance Commissioner Daniel Köbler (Green Party) visibly chastened—yet cautiously satisfied. While they acknowledged the outcome was manageable, they made it clear the worst was far from over. In fact, they meant it quite literally: Haase and Köbler compared the battle over the budget to the grueling stages of the Tour de France.
The ADD had approved Mainz's 2026 budget last week—but with severe restrictions. The authority slashed planned investments from the requested €306 million down to just €75 million, citing "unacceptable overbudgeting on a significant scale." And this was not the first time.
The criticism went further: Given Mainz's current personnel resources and the fact that it is already mid-April, the ADD deemed it "completely unrealistic" for the city to implement all the planned investments. It demanded far more realistic financial planning in the future. The authority also cut back new borrowing and debt, even declaring the city's projections for subsequent years entirely unapprovable. In short, it was another stinging rebuke for Mainz's financial management.
Haase & Köbler: Mainz Faces a "Grueling Mountain Stage" Ahead
So how did Mainz's leadership respond? Mayor Haase and Finance Commissioner Köbler—who also serves as deputy mayor—"view the approval as a success in the city's consolidation efforts," according to a statement released through their press office. "The fact that Mainz was able to submit an approvable budget to the supervisory authority is the result of a joint effort by both politics and administration," they emphasized at a press conference last week. Yet the ADD had made one thing abundantly clear: the budget was not, in fact, fully approvable as it stood.
The authority only greenlit the budget to avoid rejection by the state interior ministry, which—just ahead of the late March state elections—apparently sought to prevent turmoil in local governments. The official reasoning? Due to special federal funds, municipalities urgently needed approved budgets. Ensuring their financial capacity was of "the highest priority," the ADD explained in its letter to Mainz, which is why it had proceeded with the approval despite its reservations.
One thing is certain: the ADD is far from satisfied with Mainz's austerity measures, contrary to how city leaders have framed it. At a press conference last Wednesday, Haase and Köbler admitted that the real challenges still lie ahead. "The finance commissioner won't be satisfied until the budget is balanced," said Köbler, who only recently took over the post from his predecessor, Günter Beck (Green Party). Together with Haase, he drew a parallel to the Tour de France: "We've just reached the summit of a tough mountain stage—but we all know: tomorrow brings another brutal climb," Haase remarked.
Mainz Plans €1.1 Billion in New Debt by 2029
And the next stage, Köbler added, starts "right back in the valley"—facing another steep ascent. The numbers speak for themselves: Mainz's financial projections include staggering new borrowing of around €395.4 million in 2026 alone, totaling roughly €1.1 billion by 2029. This would catapult the city back to its pre-pandemic debt levels in record time—erasing the financial boost it once received from BioNTech's billion-euro windfall.
In its letter, the ADD warned of "barely justifiable new debt," while the city pointed to its "comprehensive consolidation and efficiency package." "Mainz will do everything in its power to stabilize the budget," Haase reiterated. Beyond that, however, the mayor shifted responsibility upward, calling for "fundamental reforms" from the state and federal governments. These, he argued, must include "a critical review of mandated tasks, a freeze on expanding public-sector positions, and efficiency improvements at the state level." Without such changes, Haase implied, Mainz's financial struggles will only deepen.
Mayor Köbler sounded the same alarm: "Despite strong economic growth and a favorable labor market, the city of Mainz is also affected by the nationwide municipal financial crisis," he stated. "We now expect the state government to reform the municipal fiscal equalization system in a way that provides tangible relief for the state capital." At the same time, he urged the federal and state governments to implement fundamental reforms: "Germany needs a fair distribution of funds between the federal government, the states, and the municipalities," Köbler demanded.
"For the Dignity of Our Cities" Alliance: Plea to Merz
Last week, top officials from numerous German cities—including Mainz—once again turned to Chancellor Friedrich Merz (CDU) in a letter. Their message: "We lose a piece of our ability to act every day." Their demand: €32 billion in net relief for local governments. Mainz is a founding member of the "For the Dignity of Our Cities" action alliance, through which municipalities nationwide are drawing attention to the dire financial situation facing cities and towns.
In their renewed appeal, the alliance states that cities' deficits surged to a record €31.9 billion nationwide last year, according to calculations by the Federal Statistical Office—a figure reached in just three years. "At the same pace, local governments are losing their capacity to act," the alliance warns, with serious consequences: "It is no coincidence that populists and extremists achieve their strongest election results in areas where municipal financial distress is most severe."
There is a direct, scientifically proven link between a municipality's budgetary situation and its residents' tendency to vote for extremist parties. The €31.9 billion deficit illustrates just how much funding local governments lack to fulfill their responsibilities—which is why the alliance is calling on the federal and state governments to take immediate action and provide net relief on the same scale.
Mainz's "Kenia Coalition" Demands "Fundamental Reforms" from Federal and State Governments
The three faction leaders of Mainz's "Kenia Coalition"—comprising the CDU, SPD, and Greens—also backed this narrative. The conditional approval of the budget, they said, was "first and foremost a positive signal," while the 2026 budget would remain "solid even with the attached conditions." Jonas König (Greens), Claudia Siebner (CDU), and Kathleen Herr (SPD), the coalition's parliamentary group leaders, emphasized that "significant efforts and initial consistent consolidation measures" had been necessary to secure budget approval in the first place.
Meanwhile, city officials stated they could work with the requirements set by the ADD (State Supervisory and Service Directorate): "The ADD has tightened the reins, but with €75 million in investments, we can operate effectively," city spokesperson Andreas Behringer said in an interview. Authorities are now reviewing the exact implications of the conditions, but he acknowledged: "Before May, we couldn't carry out many investments at all." The sums in recent years had not been significantly higher anyway. "If we find that essential projects are still missing, we will apply for additional funds," Behringer added—a path the ADD had explicitly left open.
