A supplier can build the best battery system on the market, price it competitively, deliver it on time, and still be locked out of Europe's fastest-growing industrial demand. It’s all because of where the inputs came from.

That’s what supply chain leaders need to absorb about the EU's Industrial Accelerator Act, unveiled in March, 2026. Most executives are still working through the Inflation Reduction Act — the content thresholds, supplier qualifications and compliance timelines that have absorbed bandwidth since 2022. Fewer have registered that Europe has moved in a parallel but structurally different direction, one that could prove more disruptive to global supply chain strategy than anything the IRA introduced.

The difference comes down to mechanism. The IRA uses money to pull investment in: Meet the criteria, collect the incentive. The IAA attaches "Made in EU" and low-carbon requirements directly to public procurement and state aid, as thresholds that determine whether you can compete. A globally optimized supply chain that fails those tests may not have the opportunity to bid at all.

For anyone who runs a supply chain, this creates a fundamentally different category of risk. A tariff changes your cost structure — you can model it, price around it, absorb it. An eligibility rule removes the option entirely. The math you're good at solving no longer applies.

The IAA bites hardest in the sectors where Europe feels most strategically vulnerable: electric vehicle batteries, grid equipment, industrial automation, low-carbon steel and semiconductor packaging. These are also, not by accident, sectors where Chinese producers have advanced most aggressively. China, rather than the U.S., is the real target. But the localization standards, carbon thresholds and investment-screening provisions written to contain Chinese supply chains will apply to any non-European participant whose footprint falls short. American manufacturers are collateral, but operationally, the distinction won't matter much.

The rules aren’t finished. France wants strict EU-origin definitions. Germany and the Netherlands want flexibility and World Trade Organization (WTO) compatibility. Final adoption may be more than a year out. That uncertainty gives executives a reasonable-sounding case for waiting.

Waiting is the expensive move. Industrial ecosystems consolidate around whoever shows up first: strategic sites, preferred suppliers, joint-venture partners and incentive pools. By the time the framework is codified, the best positions tend to be taken. Companies that defer until the rules are certain often discover the map was redrawn while they were waiting for it to hold still.

The right moves now are diagnostic. Three are worth starting immediately:

• Map European exposure honestly. Identify which revenue streams and supplier relationships touch Europe, and where eligibility requirements could choke access. Most organizations will surface dependencies they have never fully mapped.
• Pressure-test traceability. The IAA runs on proof of origin and carbon intensity, exactly what most supply chain systems cannot yet produce on demand. Building that capability takes time, and is a prerequisite no matter how the political fight resolves.

• Preserve optionality on footprint. Companies with real European ambitions should be scoping localization scenarios and the partnerships that could support them—not committing capital but keeping doors open before they close.

Step back, and the IAA reads as a marker of something larger. The single, globally integrated, efficiency-maximizing supply chain is giving way to parallel regional models, each with its own industrial policy, compliance regime and eligibility rules. The premise modern supply chain management was built on — that global optimization minimizes cost — now competes with a world where the rules of the game can change at every border.

The definition of global supply chains is widening. Cost and reliability still matter. So now do origin traceability, carbon compliance and geopolitical alignment—variables that no procurement team can manage on its own, and that belong on the leadership agenda well before regulation is finalized.

The IAA is still being drafted, but the industrial map it will produce is already forming.

Florent Nanse and John Jullens are partners at Arthur D. Little.