Portugal Races to Save €880 Million in Competition Fines From Expiring on a Deadline Loophole

Portugal's competition watchdog is warning that roughly €880 million in fines it has already imposed could simply expire — not because companies won the argument on the merits, but because the clock ran out. The Autoridade da Concorrência (AdC — Competition Authority) says cases across food retail, banking, energy, telecommunications and transport risk prescription (the legal statute-of-limitations expiry) between July 2026 and March 2027 unless Parliament clarifies the law.

The flashpoint is a technical dispute over when the prescription clock stops ticking. A 2022 reform (Law 17/2022) established that the deadline is suspended while an AdC decision is under judicial review, including appeals up to the Constitutional Court. The AdC wants unambiguous confirmation that this suspension applies to cases already pending when the reform took effect — not only to infringements committed afterwards. Without it, years of complex investigations could unravel on a calendar technicality.

The banking cartel that got away

The cautionary tale is the so-called cartel da banca (banking cartel). Over a dozen financial institutions were investigated for exchanging sensitive commercial information — including on loan spreads — over more than a decade. The AdC fined them around €225 million at first instance, and the EU Court of Justice confirmed that such systematic information-sharing breaches competition rules. Yet the Tribunal da Relação (Court of Appeal) declared the case prescribed, ruling that the deadline had not been suspended during the years the file sat with the European court. The Constitutional Court then rejected the AdC's challenge, confirming the annulment. A landmark case ended with no penalty paid.

It is not an isolated scare. A separate process saw a court declare prescription in a matter that could let energy group EDP escape a fine of around €25 million. Multiply those outcomes across the sectors now approaching their deadlines, and the AdC's €880 million estimate comes into focus.

Parliament's half-answer

Lawmakers have noticed. In April 2026, Parliament approved two bills — from the Communist Party (PCP) and from Chega — both providing that the 2022 rules apply to cases pending at the time they entered force, with the Chega text also lengthening prescription periods. But the AdC's president, Nuno Cunha Rodrigues, has pressed for speed and certainty, telling MPs he would rather not have to return to the same committee in future to discuss the same problem. His point is blunt: enforcement that collapses on timing sends a message that patient, well-resourced defendants can litigate their way past the deadline.

What This Means for Expats

• Consumer stakes: Competition fines exist to deter price-fixing and information cartels that quietly inflate what you pay for banking, fuel, mobile plans and groceries. When they lapse, the deterrent weakens — and households ultimately foot the bill.
• Business compliance: Do not read prescription risk as a green light. The AdC is actively closing the loophole, and future conduct enjoys the strengthened suspension rules with no realistic timing escape.
• Rule-of-law signal: For anyone weighing where to invest or bank, how a country enforces its own competition rulings is a quiet but real indicator of institutional reliability.

The broader picture is a regulatory state trying to modernise its tools in real time — the same impulse behind bringing crypto under the MiCA framework and ordering the energy regulator to explain sticky pump prices. Enforcement is also playing out in the courts elsewhere, from the tax-fraud trial of cruise magnate Mário Ferreira to shifting fortunes in Portugal's grocery market. On competition fines, the message from the AdC is that a ruling nobody pays is not much of a ruling at all — and the fix is now a race against the calendar.