Berlin’s €838 billion debt plugs budget holes

Germany's cabinet approved €838 billion in new borrowing over 2027–2030, split between defence, infrastructure and climate (BMF, DW). The question is whether this debt funds new railways, grids and defence capacity, or simply frees Berlin to move old spending off the visible budget. The early numbers point uncomfortably toward the second.

Most of the Money Isn't New

The concept that matters here is additionality: does the borrowed euro pay for a project that wouldn't otherwise exist, or does it just replace money the government would have spent anyway from regular revenue?

The ifo Institute tested this using 2025 data, the first year Germany's infrastructure special fund was active. Berlin borrowed €24.3 billion through the fund. Actual federal investment rose by just €1.3 billion compared with 2024. ifo's verdict: 95% of the new debt did not become additional investment. The IW Cologne institute calculated 86% displacement. Either way, the bulk of "infrastructure" borrowing was plugging holes in the ordinary budget.

The finance ministry's economist Armin Steinbach responded that the spending was genuinely additional because it wouldn't have happened under tighter finances. That defence cannot be tested against the accounts. The accounts show borrowing rising much faster than measured investment.

How the Debt Brake Stays Intact on Paper

Germany's debt brake (a constitutional rule capping the government's structural borrowing at 0.35% of GDP) still exists. But Berlin routes most new spending around it through two mechanisms.

The first: defence and security spending above a set threshold is exempt from the cap entirely. In 2027, that exemption covers €85.4 billion of the core budget's €118.7 billion in new debt. The brake binds on everything except the military.

The second: special funds (Sondervermögen, off-budget pots with their own borrowing authority) carry debt that doesn't appear in annual ministry budgets but still lands on the public balance sheet. Combined, Germany borrows over €200 billion in 2027 alone (BMF, Reuters via Marketscreener). Meanwhile every non-defence ministry absorbs a 1% spending cut. The transport budget falls from €27.9 billion to €26.4 billion (vergabeblog.de).

The Eurobond Contradiction

Germany can do this because its debt-to-GDP ratio sits around 62.5% (Eurostat). Italy, at 135.3% of GDP under an excessive-deficit procedure (the EU process for governments breaching deficit or debt rules), has no such room. This asymmetry makes Germany's position on common EU borrowing look increasingly self-serving: Berlin borrows at unprecedented scale nationally while still blocking eurobonds that would give other member states similar fiscal space. Italy and Spain now jointly push for shared European debt.

Delivery Is the Binding Constraint

German taxpayers inherit rising interest costs: planned debt service jumps from €33.6 billion in 2026 to €82.1 billion by 2030 (Surplus Magazin). Scope Ratings estimates the programme could add 0.3–0.4 percentage points to annual growth, conditional on projects actually being built. Bruegel warns that bigger defence budgets without coordinated procurement won't create efficient production lines.

The sharpest constraint isn't money. 36% of the 2025 modernisation budget went unspent because planning capacity and procurement speed couldn't keep up. The test for €838 billion is delivered rail, working grids and usable military capability. Budget arithmetic alone guarantees none of it.