From transfer pricing policy to VAT exposure: the Stellantis wake-up call

On 13 May 2026, the ECJ handed down its decision in Stellantis Portugal (C 603/24), and it is not the clean answer the industry was hoping for. The ECJ confirmed that a year-end transfer pricing adjustment is not, by default, consideration for a VAT-taxable service. But what it opened up on the other side may matter considerably more.

No automatic VAT trigger, but that is only the starting point

A year-end transfer pricing adjustment is not automatically a VAT trigger. No requalification, no deemed service. But that is not where the story ends.

The ruling turns on a foundational VAT principle: a direct link must exist between a specific supply and the payment received. In Stellantis, that link simply was not there. The adjustments were driven by overall margin alignment, calculated across multiple cost elements, and only indirectly, if at all, connected to any identifiable service. No link, no supply, no VAT. So far, so good. But the ECJ was careful not to close every door.

The same adjustments, the ECJ noted, may still constitute corrections to the original price of the goods. And that recharacterization carries a completely different set of consequences, ones that many MNCs have historically treated as an afterthought.

• VAT adjustments on the underlying supply
• Corrections to declared customs value
• Documentation that must hold up consistently across all three regimes

This is the real shift. Stellantis Portugal does not resolve the interaction between transfer pricing, VAT and customs. It forces those three disciplines to be read together, not in isolation, not sequentially, but as one coherent value chain where the same economic story must be told consistently across all three.

One economic story across transfer pricing, VAT and customs 

Year-end transfer pricing adjustments are no longer technical clean-up entries. They are a VAT question, a customs valuation question, and increasingly an audit trigger. All at once.

For years, the default posture was to treat these adjustments as internal accounting corrections. Stellantis Portugal makes that posture untenable. The ruling signals clearly that tax authorities will look at the full picture, and that inconsistencies between a group's transfer pricing policy, its VAT treatment, and its customs declarations create exactly the kind of exposure that invites scrutiny.

The question every MNC should now be asking is not whether Stellantis Portugal applies to them. It almost certainly does. The question is whether they can tell a consistent economic story across transfer pricing, VAT and customs that stands up to that scrutiny.

If they cannot, the tax authority will tell it for them.

What to do now?

Review your year-end transfer pricing adjustment policy against your VAT treatment of intercompany supplies and your customs valuation methodology. If these three do not tell the same story, close the gap before someone else notices it.

More information?

At aaff, we like to be meaningful, by sharing knowledge, providing insight and offering practical advice. Please feel free to contact our specialists if you want learn more or how to prepare. 

You can also read our previous article on this topic here 'Year-end transfer pricing adjustments: why VAT and customs are suddenly in the room'.