When the little pop-up that says “your subscription has renewed” arrived in April for millions of Australians, a lot of people may not have noticed the fine print. What they did notice — and complained about loudly on forums, helpdesks and to regulators — was the bill: Microsoft 365 Personal and Family annual prices had jumped, and the plans now included Copilot, Microsoft’s consumer-facing AI assistant. Now Australia’s competition watchdog says that jump wasn’t explained properly — and on Monday it put Microsoft in the Federal Court.

The Australian Competition and Consumer Commission (ACCC) says Microsoft misled about 2.7 million Australian customers by telling them they would have to accept Copilot and pay higher prices to keep their Microsoft 365 Personal or Family subscriptions, or cancel — while quietly leaving in place a cheaper “Classic” plan that lacks Copilot but keeps the previous price. The regulator alleges Microsoft only showed that cheaper option deep in the cancellation flow, after a customer had already clicked “Cancel subscription.”

How big was the price shock?

According to the ACCC, after Copilot was folded into consumer plans, the annual price for Microsoft 365 Personal rose by 45% (from A$109 to A$159) and the Family plan rose by 29% (from A$139 to A$179). That’s not pocket change for many households — and, the ACCC says, consumers would have made different choices if the cheaper Classic option had been made clear from the start.

The ACCC’s concise statement says the sequence went like this:

• 31 October 2024 — Microsoft published a blog post announcing Copilot’s integration and told subscribers that price increases would apply at their next renewal.
• Early 2025 — Microsoft sent at least two emails to auto-renewing subscribers to warn of the change.
• From April 2025 — those renewals started to take effect, depending on individual customers’ renewal dates.
• 27 October 2025 — the ACCC filed its proceedings in the Federal Court.

The regulator even includes screenshots and an “example timeline” in its media release to show how a subscriber who bought a plan in April 2024 could unknowingly be charged the higher price on renewal in April 2025.

What the ACCC says Microsoft did wrong

At the heart of the ACCC’s case is the allegation that Microsoft’s external messages gave consumers a binary choice — accept the Copilot-integrated, higher-priced renewal or cancel — when in fact there was a third practical option: switch to a Classic plan for the old price. The regulator claims Microsoft’s emails and the public blog post never mentioned that Classic option; a user could only find it after starting the cancellation flow and clicking through. ACCC Chair Gina Cass-Gottlieb said the conduct appeared designed to “increase the number of consumers on more expensive Copilot-integrated plans.”

Microsoft’s response so far

Microsoft’s public response to the ACCC’s action has been measured: a spokesperson said the company is reviewing the regulator’s claim in detail. Reuters reports Microsoft is not accepting the allegations at face value and will defend itself in court. For now, Microsoft has not admitted wrongdoing in any public statement.

What the regulator is asking for — and what’s at stake

The ACCC wants a package of remedies: penalties, consumer redress (money back or other compensation), injunctions and court costs. Australian law sets stiff maximum penalties for corporations — for each breach, the fine can be the greater of A$50 million, three times the benefit obtained that is attributable to the breach, or 30% of adjusted turnover in the relevant period where benefits can’t be calculated. The ACCC says the size of any penalty will be a matter for the court to decide.

The practical stakes are also straightforward: if the court finds for the ACCC, Microsoft could be forced to refund customers and change how it presents subscription choices globally, not just in Australia. If the court doesn’t, the decision will still be watched because regulators everywhere are paying attention to how Big Tech bundles AI into existing services.

Why regulators care about bundling and “dark patterns”

This case sits at the intersection of two hot topics: consumer protection around subscription renewals and the rise of AI features being bolted onto existing software. Regulators have been warning for years about opaque flows that nudge users into expensive choices — sometimes called “dark patterns” — and adding high-value AI features into popular consumer subscriptions raises the pressure on firms to be transparent about what’s changing, and what the alternatives are. Australia’s action could be a bellwether for other jurisdictions that are tightening rules around disclosure and fair dealing.

A user’s practical question: can I get my old plan back?

The ACCC’s release notes that some subscribers who have not been renewed since 8 July 2025 may be able to revert to their previous plan by starting the cancellation flow and selecting the Classic plan when it’s offered there — but it warns that the options and prices on Microsoft’s site are under Microsoft’s control and could change. In short, some users might be able to switch back, but it’s not a guaranteed or permanent fix; the court case is where broader redress would be decided.

What happens next

The ACCC has filed its concise statement in the Federal Court — that document sets out the regulator’s legal case and the facts it relies on. Microsoft will respond in court and the matter will head into litigation unless there’s a settlement. Expect a procedural phase (document discovery, affidavits and hearings) followed by judicial decisions on whether the ACCC has proved the alleged misleading conduct. The timeline for that — and whether the ACCC will seek interim orders — will unfold in court filings.

Bigger picture

This isn’t just a fight about a few dollars on a renewal notice. It’s part of a wider moment in which regulators are testing how traditional consumer-protection laws apply to AI rollouts, subscription ecosystems, and the design of UX flows that steer millions of people. Companies that fold AI into everyday products — especially where those products are “essential” like office suites — are likely to face scrutiny about both messaging and default settings going forward. How the Australian court treats this case could influence regulatory expectations elsewhere, from the EU to North America.

Final thought

To many users, the change may have felt like an administrative bump — a new feature, a price that “just” renewed — but to a regulator watching millions of complaints and forum posts, it looked like a pattern that denied people a fully informed choice. Whether the court agrees will come down to how the communications were presented, what Microsoft knew and when, and how Australian consumer law treats disclosure in the age of AI. For now, the ACCC has put Microsoft under the microscope; the hearing will decide whether that spotlight uncovers a regulatory breach or a company misstep that can be fixed without penalty.