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Iran War Shaves 50 Billion Off German Output Institutes Cut Growth Forecasts, Berlin Prepares Response
At a glance
- •The Gemeinschaftsdiagnose now forecasts 0.6% GDP growth for Germany this year and about 1% for 2027.
- •The downgrade implies approximately €50 billion less in value added compared with the previous projection.
- •The Iran war and higher oil and gas prices are the primary drivers of the weaker outlook.
- •The joint forecast was prepared by RWI Essen, DIW Berlin, Ifo Munich, IWH Halle and the Kiel Institute.
- •Berlin indicates it will react, but concrete policy measures were not yet announced.
- •Energy-price volatility and geopolitical shocks remain the key macroeconomic risks for firms and policymakers.
Economic outlook weakens as energy prices bite
Berlin Germany's leading economic research institutes have sharply downgraded their growth outlook, warning that the fallout from the Iran war and higher energy prices will leave a lasting mark on the economy. Insiders told Handelsblatt the consolidated "Gemeinschaftsdiagnose" projection now expects gross domestic product (GDP) to expand by only 0.6 percent this year. For 2027 the institutes see growth of roughly 1 percent.
The joint forecast compiled by RWI Essen, DIW Berlin, the Ifo Institute in Munich, the IWH in Halle and the Kiel Institute for the Federal Ministry for Economic Affairs will be presented officially on Wednesday. It replaces a projection made about six months ago, when the same group had expected GDP growth of 1.3 percent this year and 1.4 percent next year. Taken together, the weaker outlook implies roughly €50 billion less value added than previously anticipated.
Researchers attribute most of the downgrade to the economic effects of the Iran war and the steep rise in oil and gas prices that followed. Higher energy costs have squeezed businesses' margins and depressed demand in energy-intensive sectors, while uncertainty from the geopolitical shock has weighed on investment and trade. The institutes caution the figures could still be adjusted before the formal reveal.
Federal Economic Affairs Minister Katherina Reiche (CDU) said on Monday that the cooling of the economy is visible "very, very clearly." Berlin says it will respond to the new data, though officials have not yet detailed the specific policy measures under consideration. Finance Minister Lars Klingbeil (SPD) has also been involved in discussions, underscoring the government's awareness of the downside risks.
Policy makers will be watching whether the energy-driven slowdown proves temporary or signals a broader loss of momentum. If energy prices remain elevated, consumption could falter further and companies may delay hiring and investment, increasing the risk of a prolonged period of weak growth. On the other hand, if supply shocks ease and prices retrace, the institutes expect some rebound albeit to a lower trend than previously assumed.
For markets and businesses, the message is clear: geopolitical shocks and commodity-price volatility remain central macro risks. The imminent release of the Gemeinschaftsdiagnose will give firms and investors updated baseline scenarios for planning, but uncertainty around oil and gas prices means contingency planning remains essential.
The full report will offer more detail on sectoral impacts, labour-market implications and recommended policy responses. Until then, analysts will be parsing any early signals from energy markets and government briefings for clues about the depth and duration of the slowdown.
