Germany Needs €6 Trillion of Climate Investment to Reach Net Zero by 2045

Germany will need around €6 trillion of climate-related investment by 2045 to achieve climate neutrality, equivalent to approximately €290 billion a year, according to a new KfW study prepared by Prognos. Transport accounts for 45% of the required investment, followed by energy at 25%, buildings at 22% and industry at 8%. Current climate investment remains well below that level, leaving Germany with an estimated annual investment gap of around €180 billion if recent spending patterns continue.

The new estimate is €1 trillion higher than the €5 trillion investment requirement identified in KfW’s previous study in 2021. KfW attributes the increase primarily to higher prices in recent years and the country’s continuing investment backlog.

 

Current Climate Investment Is Less Than Half the Required Level

 

Germany invested an average of around €110 billion a year in climate action between 2018 and 2023 across businesses, households and the public sector. Meeting the €290 billion annual requirement would therefore mean increasing investment by roughly €180 billion each year through 2045.

The headline €6 trillion figure includes spending that would also have been required under a fossil-fuel-based development pathway. When KfW compares climate technologies only with conventional alternatives, the additional investment requirement falls to around €65 billion annually, equivalent to less than 2% of German GDP.

 

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Businesses Face Almost Half of the Investment Requirement

 

Private and public-sector companies are expected to account for just under €3 trillion of the total requirement, equivalent to around €140 billion each year. Large companies and SMEs are expected to carry broadly similar shares of that burden. Businesses spent approximately €80 billion on climate action in 2024, indicating that corporate investment will need to rise substantially.

Energy companies face the largest sector-specific requirement, at around €1.3 trillion. Spending will need to cover electricity grids, district heating networks and renewable energy generation, while industrial companies will need to invest in technologies such as hydrogen-based steelmaking and the electrification of process heat.

 

Transport, Buildings and Energy Will Drive Most Spending

 

Transport represents the largest component of the transition, accounting for 45% of total investment needs. Households will contribute through the renovation and modernisation of residential buildings as well as the shift from internal combustion vehicles to electric mobility.

The public sector is expected to provide around €33 billion of the €290 billion required annually, while private actors would contribute approximately €257 billion. Government investment will be particularly important in infrastructure such as electricity distribution networks, district heating, rail and electric vehicle charging.

 

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KfW Says Climate Investment Can Also Reduce Economic Risks

 

KfW argues that the scale of investment should be considered alongside the costs Germany would continue to face under a fossil-based pathway and the economic damage associated with climate change. The study points to more than €50 billion in losses from extreme weather events in Germany over the past five years and says the 2026 heatwave significantly reduced economic output.

Germany also has an industrial opportunity in the transition. The country is already the world’s second-largest exporter of climate technologies, according to KfW, giving domestic companies potential exposure to expanding global markets as investment in clean technologies increases.

 

Private Capital Will Be Critical to Closing the Gap

 

KfW plans to continue financing climate projects across businesses, households and the public sector, but says government and development-bank funding alone will not be sufficient. The institution has committed around €415 billion in environmental and climate finance since 2017 and is also working with the German government through the Germany Fund to support climate transformation projects and attract private investment.

"Investing six trillion euros by 2045 is an enormous effort. But this sum falls into perspective when we consider that Germany would also need to invest heavily if it stuck with fossil technologies," said KfW Chief Executive Officer Stefan Wintels. He described the transition as an "ambitious but manageable challenge." The central financing test will be whether Germany can raise annual climate investment from recent levels towards €290 billion while mobilising enough private capital to cover most of that requirement.

 

Source: KfW