Abstract
Offshore wind power has become a cornerstone of global decarbonization strategies, yet its expansion depends not only on technological progress but also on access to affordable finance. This study shows how the financial structure of offshore wind projects has evolved as the technology matured, offering important insights for policymakers, investors, and society. By analyzing 86 offshore wind projects across nine countries, we find that investors increasingly perceive offshore wind as a low-risk, reliable infrastructure asset. This is reflected in three key trends: projects reach financial close earlier in their development cycle, they rely more heavily on debt (i.e., lower-cost capital), and they attract a growing share of international investment. Together, these trends indicate rising investor confidence and a transition toward a more standardized, “commoditized” asset class. These findings have direct societal relevance. Lower perceived risk reduces the cost of capital, which in turn lowers electricity prices and accelerates the deployment of clean energy. This makes offshore wind more accessible and affordable for consumers while supporting climate goals. At the same time, the increased participation of global investors highlights the importance of stable and transparent policy frameworks, such as long-term revenue support schemes, to continue attracting capital at scale. For emerging offshore wind markets, the results provide a blueprint: policy certainty, well-designed auctions, and credible pipelines can unlock private finance and accelerate industry growth. More broadly, the financing model observed here may inform the deployment of other capital-intensive clean technologies, such as hydrogen and energy storage. Understanding how investor structures evolve is therefore critical, not only for scaling offshore wind but also for shaping the wider transition to a low-carbon energy system.