In March 2026, the German government and investors are anxiously watching developments in the government bond market. The yield on German ten-year government bonds has just crossed the 3 percent threshold, the highest level since 2011. Before the outbreak of the conflict with Iran, it hovered around 2.7 percent. As experts from the Centre for European Economic Research ZEW and Landesbank Baden-Württemberg emphasize, this trend is no longer just a temporary market fluctuation. It signals a real increase in public debt servicing costs, which could soon reach 120-150 billion euros annually across all levels of government — from the federal level through the states to the municipalities.
For years, Germany benefited from its image as the safest debtor in the eurozone, and its bonds were considered a safe haven in times of crisis. Today, however, the situation has reversed. German government securities now carry an additional risk premium, raising the costs of new issuance and rolling over existing debt. Bundesfinanzagentur plans a record issuance of 512 billion euros in 2026, of which 115.5 billion euros is earmarked for the second quarter alone. Each new tranche of bonds issued at higher yields means higher interest payments that ultimately fall on the shoulders of taxpayers.
A key factor driving debt growth is the special fund for infrastructure and climate neutrality launched in 2025. The federal government opted for credit-financed spending totaling 500 billion euros, which required a constitutional amendment and circumvention of the traditional debt brake. The fund, divided into three pillars — 300 billion for the federal level, 100 billion for the states, and 100 billion for climate and transformation — is intended to modernize the country: building roads, railways, schools, hospitals, digital infrastructure, and accelerating the energy transition. The funds have already been largely deployed. In 2025, 24 billion euros were spent from the fund, and 58 billion are planned for 2026.
As a result, Germany's total public debt is heading toward four trillion euros. The primary beneficiaries are private and institutional investors who purchase Bundesanleihen at higher yields. Just a few years ago, such bonds offered near-zero returns; today they yield over 3 percent while maintaining the highest AAA credit rating. For pension funds, insurers, and individual investors, this is an attractive alternative to riskier assets, especially in times of geopolitical uncertainty.
The situation is made all the more difficult by the fact that, alongside higher government bond yields, financing costs are also rising at the state and municipal levels, which do not enjoy the same creditworthiness as the Bund. As a result, the entire public finance system is becoming increasingly expensive. Elmar Völker of LBBW stresses that the effects are difficult to estimate precisely, but persistent supply chain disruptions and potential interest rate hikes by the European Central Bank will only deepen the problems.
In summary, the rise in German government bond yields is not merely a technical phenomenon in the capital markets. It is a direct signal of growing costs across the entire German debt model, amplified by the ambitious special funds program for infrastructure and climate. The 500 billion euros in additional debt issued through bonds will benefit investors seeking safe and increasingly well-yielding securities, but for the state it means a multi-year budget burden on the order of 120-150 billion euros annually.
