Facebook and Instagram parent Meta Platforms argued Tuesday before London’s High Court that Britain’s communications regulator has unlawfully granted itself the power to fine technology companies based on their entire worldwide earnings — a formula that could expose Meta alone to penalties approaching £15 billion (approximately $20 billion).

The Online Safety Act 2023 penalties empower Ofcom to fine in-scope platforms up to 10 percent of “qualifying worldwide revenue” or £18 million ($23.8 million), whichever figure is larger. Applied to Meta’s full-year 2025 revenue of approximately $201 billion, that formula produces a theoretical penalty ceiling of roughly £15 billion ($20 billion) — a figure without precedent in the history of UK corporate enforcement.

Meta’s challenge, filed in claim AC-2025-LON-004500, targets the secondary legislation that operationalizes that ceiling. Specifically, Meta is contesting two structural features of the Qualifying Worldwide Revenue Regulations 2025:

The global-revenue base. Ofcom’s regulations count a platform’s worldwide revenue — not only what it earns from UK users — when calculating both annual supervision fees and maximum penalty ceilings. Meta argues that Parliament never intended a national regulator to reach beyond domestic revenues when setting financial sanctions against companies that happen to be global.

Corporate group aggregation. Ofcom may pool the revenues of an entire corporate group — Facebook, Instagram, and WhatsApp treated as one — to set the fine ceiling, regardless of which individual service is in breach. Meta contends that this goes beyond what the statute allows and, in practice, concentrates extreme and disproportionate financial risk on a handful of companies.

Under Ofcom’s £88 million fee invoices issued to qualifying platforms for the 2026/27 billing cycle, a court ruling in Meta’s favor could require refunds of fees already collected.

Two Disputes, One Courtroom

The case reaches the Administrative Court of the King’s Bench Division at a moment when the legal architecture of the Online Safety Act is being stress-tested across multiple fronts simultaneously. The fee-and-fine formula challenge is the most commercially consequential, because it determines the upper bound of Ofcom’s enforcement power against every platform in scope — not merely Meta.

The £250 million supervision fee threshold is the minimum qualifying worldwide revenue required before a company becomes subject to mandatory fees. At that level, a company is subject to mandatory fees; above it, the 10 percent maximum penalty formula applies. Meta, with revenues two orders of magnitude above that threshold, has the most to gain from a ruling that shifts the calculation to UK-only income.

The distinction is not trivial. UK-derived revenue for a platform that makes most of its money from US and global digital advertising markets is a fraction of worldwide turnover. Shifting the base from global to domestic would reduce Meta’s theoretical penalty ceiling by an order of magnitude — and would do the same for every other Category 1 provider regulated under the act, including TikTok and X.

The Arguments on Both Sides

Meta’s position is unambiguous. In a public statement, a Meta spokesperson on fee penalties said: “We believe fees and penalties should be based on the services being regulated in the countries they’re being regulated in. This would still allow Ofcom to impose the largest fines in UK corporate history.”

Meta counsel Monica Carss-Frisk KC argued in court documents that Ofcom’s approach is “troubling” and leads to “a handful of companies, such as Meta, bearing the vast majority of Ofcom’s costs, despite the act making clear that it is concerned with a wide range of internet services offered in the UK.”

Ofcom’s position is that it has applied a plain reading of the statute. The regulator argues that worldwide revenue establishes only a notional ceiling, and that any actual penalty must be proportionate to the specific breach — meaning the theoretical maximum does not translate automatically into the actual fine in any given case. Ofcom says it has struck a “careful balance” in defining qualifying revenue, and that Parliament’s choice of a global-revenue metric reflects the inherently cross-border nature of internet platforms.

Who Else Has Standing

The hearing has attracted notable third-party participants on both sides, underscoring that its implications extend far beyond Meta’s balance sheet.

Supporting Ofcom is child-rights organization 5Rights Foundation, which was granted permission to intervene. The 5Rights Foundation’s intervention evidence argued that Parliament intended a global revenue base when drafting the Act, recognizing that internet platforms operate as an inherently global industry that cannot be meaningfully regulated by reference to a single country’s revenues. 5Rights stressed that robust enforcement is inseparable from meaningful protection of children online.

On Meta’s side stand tech trade body the Computer and Communications Industry Association (CCIA) and game studio Epic Games, creator of Fortnite. The CCIA and Epic Games statement confirmed: “CCIA supports Meta’s challenge and intends to apply to intervene in order to assist the court in understanding the wider potential impact on the sector.” Epic’s participation signals that the outcome matters to mid-tier platforms as much as it does to the largest — any company with worldwide revenues triggering the threshold faces equivalent structural exposure.

One Week, Three Legal Fronts

Tuesday’s hearing arrives amid acute simultaneous legal pressure on Ofcom from multiple directions.

From October 5 to 7, Meta joined TikTok and X in a separate hearing at which all three platforms challenged Ofcom’s information notices — legally binding data demands issued under the Online Safety Act in February. The platforms argued the requests exceeded what the statute permits.

The day after that hearing began, the regulator announced an Ofcom Instagram Instants investigation into Meta over Instagram Instants, a disappearing-content feature launched in May — the first formal Online Safety Act investigation targeting Meta’s Instagram directly. The fee-and-fine judicial review running this week is therefore only one front in an unusually broad legal campaign.

Meta is additionally contesting its platforms’ Category 1 designation appeal before the Upper Tribunal. WhatsApp and Instagram are among the services appealing their classification, arguing that heightened duties around fraudulent advertising and illegal-content reporting should not apply to private or small-group messaging. Roblox and Quora are separately challenging their own Category 1 status.

Ofcom has to date issued more than £7 million ($9.3 million) in fines against eleven providers since October 2025, including a £520,000 fine against 4chan of which £450,000 ($595,000) related to child protection failures. Against the £88 million in supervision fees already invoiced and the theoretical multi-billion-pound ceiling available for serious breaches, those numbers illustrate the gap between what the regulator is theoretically empowered to do and what it has so far done.

Can Britain’s Online Safety Act Actually Deter Big Tech?

The volume of litigation has not gone unnoticed in Westminster. Culture Secretary Lisa Nandy has criticized the pace of enforcement, describing it as raising genuine questions about whether the act’s ambitions can be delivered. Officials have characterized the legal challenges as a deliberate strategy to delay implementation of an act that commands broad public support.

The most candid assessment has come from inside Ofcom itself. Oliver Griffiths Lords committee evidence — Ofcom’s Group Director for Online Safety — told the House of Lords Communications and Digital Committee in September 2026 that Ofcom is hampered by operating in a “highly litigious environment.” In the same session, Griffiths stated: “If we run unnecessary risks, we are going to get absolutely clobbered legally by deep-pocketed individuals and firms.” He also confirmed: “We currently have judicial reviews being run against us on our fees regime, twice, by Meta.”

That admission — a regulator with potentially tens of billions of pounds in theoretical penalty authority describing itself as constrained by litigation risk — captures the enforcement paradox the Meta case puts on trial. A fine ceiling that is large enough to deter but small enough to be legally defensible is precisely the balance this court has been asked to adjudicate.

What Happens if Ofcom Loses?

A ruling in Meta’s favor would not affect Meta alone. Every Category 1 providers penalty formula applies equally to every regulated platform — including TikTok and X — meaning every such provider would see its theoretical maximum penalty sharply reduced.

Legal analysis UK deterrent effect suggests that cutting the revenue base to UK-only income would dilute the deterrent effect Parliament sought to create. Platforms operating in the United Kingdom generate only a fraction of their worldwide revenue from British users, meaning a UK-only ceiling could be absorbed as a cost of doing business rather than treated as a genuine compliance incentive. Parliamentary architects of the act may be forced to return to Westminster to reconstruct a penalty regime capable of deterring companies operating at global scale.

A quashing order — the most common remedy in judicial review proceedings — would not invalidate the Online Safety Act itself. It would instead send Ofcom back to remake its qualifying worldwide revenue regulations on a lawful basis, giving the regulator a second opportunity to define the fee structure in a way that survives court scrutiny. Whether Parliament’s intent could be fulfilled within the bounds the court allows would then become the central question for the regulator and legislators alike.

International Stakes

The case carries weight beyond the United Kingdom. The Online Safety Act follows the same global-revenue-as-base enforcement model established by the GDPR Article 83 administrative fines — the most widely copied enforcement template in digital regulation globally. The EU Digital Services Act penalties similarly cap penalties at 6 percent of annual global turnover.

Brussels will watch closely whether a UK regulator can enforce without relying on global revenues, where a convergent development has already arrived. In September 2025, the EU General Court DSA ruling annulled the Digital Services Act’s supervisory fee for very large online platforms on procedural grounds after Meta and TikTok challenged it. The court found that the European Commission had applied the wrong legal instrument — implementing decisions rather than the required delegated act — when setting the levy; the fees were not refunded, and the Commission was given twelve months to republish the framework on a lawful basis.

Two such rulings in the same year, on either side of the Channel, would deliver platform lawyers a powerful structural argument against revenue-based fee regimes across democratic jurisdictions. Neither ruling, taken alone, establishes a cross-jurisdictional precedent — the EU General Court decision turned on a procedural question, and the UK High Court is construing a UK statute. But the cumulative signal would be hard to dismiss: the enforcement tool regulators have converged on since GDPR is facing legal scrutiny in the world’s two largest digital regulatory frameworks, and at least one court has already found it deficient in its specific implementation.

What Comes Next

Day 2 of the substantive hearing is scheduled to proceed Wednesday, October 14, with a total time estimate of one and a half days before the Administrative Court, per the October 13-14 High Court hearing timetable. No ruling from the bench is expected at the close of arguments; written judgments in judicial review proceedings typically follow weeks or months after the hearing concludes.

Whichever way the court decides, the case will mark a pivotal test of the United Kingdom’s ambition to regulate globally scaled internet platforms through nationally anchored enforcement. If Ofcom prevails, its fee and penalty framework emerges legally validated — arguably the most powerful enforcement toolkit in any single national regulator’s hands outside the EU’s supervisory system. If Meta wins, the fight shifts to Parliament, where the act’s architects face the harder question of how to design a penalty regime that deters companies operating at a scale that dwarfs most national economies — and that survives the legal challenges those companies are now demonstrably prepared to fund.

Currency conversions in this article are approximate and reflect exchange rates at the time of publication.

Frequently Asked Questions

What is “qualifying worldwide revenue,” and why does it matter for the fine formula?

Qualifying worldwide revenue (QWR) is the financial base Ofcom uses to calculate both the annual supervision fees it charges large platforms and the maximum penalty ceiling it can impose for breaches of the Online Safety Act. Under Ofcom’s current regulations, QWR is calculated from a platform’s global earnings — not just what it makes in the United Kingdom. Because Meta’s worldwide revenue in 2025 was approximately $201 billion, 10 percent of that produces a theoretical ceiling of roughly £15 billion ($20 billion). Meta argues the statute only permits Ofcom to count UK-derived revenue, which would reduce the ceiling by an order of magnitude. The court’s answer to this question determines the enforcement ceiling for every large platform regulated under the act, not just Meta.

Can Ofcom actually fine Meta £15 billion under the Online Safety Act?

The £15 billion figure is a theoretical maximum — it sets the ceiling for the most severe breach, not a starting point for routine enforcement. Ofcom has stated that any actual penalty must be proportionate to the specific harm caused. In practice, the regulator has issued fines totaling just over £7 million ($9.3 million) against eleven providers since October 2025. The ceiling matters more for deterrence than for operations: a platform deciding whether to comply faces a different incentive structure depending on whether the worst-case penalty is £500 million or £15 billion. This case is deciding that deterrent calculus.

What does it mean that both the UK High Court and the EU General Court are scrutinizing revenue-based fee regimes in the same year?

The EU General Court’s September 2025 ruling annulled the Digital Services Act’s supervisory fee for large platforms on procedural grounds — the Commission used the wrong type of legal instrument to set the levy. That ruling does not create a cross-jurisdictional precedent, and it turned on an EU-specific procedural question rather than any finding that global-revenue-based fees are inherently unlawful. But if the UK High Court now rules that Ofcom exceeded its statutory authority by anchoring fees and fines to worldwide revenues, two of the world’s most significant digital regulatory frameworks will have faced legal setbacks on the same enforcement tool in the same calendar year. Platform lawyers would have a powerful accumulated argument to press in any jurisdiction where revenue-based tech regulation is being designed or challenged — potentially influencing how future frameworks are structured from the outset.

If Meta wins, will Ofcom have to refund the supervision fees already collected?

This was flagged as a procedural complication at the May 2026 preliminary hearing. Ofcom has already invoiced approximately £88 million ($116 million) in annual supervision fees to qualifying platforms for the 2026/27 billing cycle under the regulations Meta is now challenging. A quashing order from the court would not automatically require immediate refunds — the precise remedy would depend on the terms of any judgment — but it would force Ofcom to remake the qualifying worldwide revenue regulations on a lawful basis, and the question of what happens to fees already collected under the invalidated framework would need to be resolved, either by the court, by Ofcom, or through further litigation.