SoftBank Plans to Invest Up to €75 Billion in Building Computing Cluster in France
Miles Bennett
SoftBank has committed up to €75 billion to build a 5GW AI compute cluster in France — Europe's largest planned data center project — but the funding gap remains wide open.
How big is this deal?
SoftBank pledged up to €75 billion (roughly $87 billion) to build an AI compute cluster in France with a total planned capacity of 5 gigawatts.
This would be the largest AI investment by Masayoshi Son's group outside the United States, and the biggest AI data center project in Europe.
In plain terms = at full capacity, this single campus would consume roughly as much electricity as New York City at peak demand.
Why France?
The deal traces back to a dinner between President Macron and Son in Tokyo this April, where Macron pitched two key advantages.
First: France has abundant nuclear power, offering stable baseload electricity for hyperscale data centers.
Second: France has created a fast-track permitting process for AI facilities. This means → France used energy and policy together to pull SoftBank away from competing locations.
What does the build timeline look like?
Phase one: SoftBank will lead a €45 billion investment to build 3.1 GW of compute capacity in the Hauts-de-France region by 2031.
Sites include Dunkirk, Bosquel, and Bouchain — positioned to serve London, Brussels, and Amsterdam.
A later phase adds another 2 GW, bringing the total to 5 GW. At the Dunkirk site, SoftBank will partner with Schneider Electric to create a combined AI infrastructure and robotics manufacturing hub.
Is €75 billion enough?
Industry rule of thumb: building 1 GW of data center capacity costs roughly $50 billion, covering land, construction, power, and IT equipment.
For 5 GW, that implies a total cost around $250 billion — far more than SoftBank's €75 billion (≈$87 billion) commitment.
This reflects a clear need for additional, as-yet-undisclosed partners to co-finance the project. In plain terms = SoftBank is supplying the starting gun and the brand; most of the money still has to come from others.
How does SoftBank typically fund these projects?
Historically, SoftBank contributes only a small share of initial equity capital.
The bulk of financing comes through project finance structured as debt. This means → leverage, not SoftBank's own cash, is what moves the project forward.
The risk: if the build schedule slips or market conditions shift, the stability of the financing chain will determine whether the project survives.
Content is for reference only, not financial advice.