The EU Article 102 guidelines adopted on 3 September 2026 are the first binding framework the Commission has ever issued on exclusionary abuse by dominant firms, and they land with real timing pressure. Published on 9 September, they take effect thirty days later, and the 2009 enforcement priorities guidance that governed the field for almost two decades is withdrawn by 10 October 2026. Competition counsel across the single market are now rereading conduct they had assumed was safe.
## Why the Commission replaced its 2009 enforcement guidance
The 2009 paper was never a statement of law. It described which cases the Commission would prioritise, and it leaned heavily on proof of consumer harm through effects analysis. Courts in Luxembourg spent the following fifteen years building a body of case law that the guidance did not fully track.
The new EU Article 102 guidelines close that gap by codifying the judgments rather than the enforcement appetite. That is a meaningful shift: guidance about priorities binds nobody, while guidance that claims to restate the case law shapes what national competition authorities and national judges do every week.
## What changes in the evidentiary burden
The most consequential change is the lowering of what the Commission must demonstrate. Under the 2009 approach, an effects-based showing was the practical default for most exclusionary theories. The 2026 text instead sorts conduct into categories, with some forms treated as presumptively capable of exclusion and the burden shifting to the dominant undertaking to rebut.
For pricing conduct, the analytical anchor survives. Predatory pricing, margin squeeze and conditional rebates are still assessed by asking whether a hypothetical equally efficient competitor could match the conduct, using price-cost tests built from the dominant firm’s own contemporaneous internal data rather than reconstructed estimates.
## How dominance itself is assessed
The guidelines keep a familiar safe harbour: dominance is generally unlikely below a 40 percent market share. That threshold is a presumption, not a shield, and the text is explicit that lower shares can still support a dominance finding.
Digital and platform markets get particular attention. Network effects, data advantages and multi-sided structures are treated as factors that can sustain market power at share levels which would look unremarkable in a conventional goods market.
## The resilience argument dominant firms can now make
A further novelty is the room the Commission has left for firms to justify conduct by reference to broader policy goals. Companies may argue that restrictive behaviour contributes to public health, product safety, or the ability to withstand supply shocks, and thereby rebut a finding of abuse.
That opening reflects the political mood in the current Commission, where competitiveness and supply-chain resilience have moved to the centre of the economic agenda. It also creates a live risk. Objective justification has historically been a narrow door, and widening it invites every dominant firm with a plausible industrial-policy story to walk through.
### The dates that matter
– Adopted: 3 September 2026
– Published: 9 September 2026
– In force: thirty days after publication
– 2009 guidance withdrawn: by 10 October 2026
– Dominance safe harbour: below 40 percent market share
## What happens next for national regulators and defendants
National competition authorities apply Article 102 directly, so the guidelines will reach far beyond the Commission’s own caseload. Smaller agencies with thin economic teams have every incentive to lean on a presumption-based framework, which is precisely why the rebuttal standards will be tested quickly.
The first serious test will come from litigation. Guidelines cannot bind the Court of Justice, and a defendant that loses on a presumption the Court has not endorsed in those terms will appeal. Expect the resilience justification and the category-based presumptions to be the two battlegrounds.
## Key takeaways
The EU Article 102 guidelines give the market something it has asked for since 2009: a single document setting out how the Commission reads exclusionary abuse. The price is a framework that is easier for enforcers to deploy and harder for dominant firms to resist at the threshold stage.
Whether that trade produces better outcomes depends on how seriously the rebuttal routes are taken in practice. A presumption that can be displaced with credible evidence is workable. A presumption that functions as a verdict is not, and the Luxembourg courts will eventually say which one the Commission has built.
