Costco sells more than 157 million rotisserie chickens every single year. That’s roughly one chicken for every two people in the entire United States, annually. And at just $4.99 a pop, it’s one of the most iconic grocery deals in the country. But a new proposed class-action lawsuit alleges that the label on those birds has been misleading customers — and the dollar figure attached to the claims is staggering.
So what’s actually in the chicken?
Here’s the short version: two women in California filed a lawsuit on January 22 in the U.S. District Court for the Southern District of California, accusing Costco of falsely advertising its Kirkland Signature Seasoned Rotisserie Chicken as containing “no preservatives.” The complaint claims the chicken actually contains two ingredients that function as preservatives — sodium phosphate and carrageenan. Both were listed on the packaging, but the plaintiffs argue they were buried in the fine print on the back of the label, while the big, bold “no preservatives” signage was front and center in stores and online.
Sodium phosphate is used to control pH levels and slow down fat oxidation, which basically means it helps prevent spoilage. Carrageenan, meanwhile, is a thickening agent derived from seaweed that’s commonly used in processed foods. Whether or not these technically count as “preservatives” in a regulatory sense is likely going to be one of the central arguments in this case. But according to the lawsuit, their presence makes Costco’s prominent “no preservatives” marketing misleading at best.
Costco’s response was pretty quick
To their credit, Costco didn’t just stonewall this one. The company issued a statement to media outlets within days, acknowledging the ingredients in question and explaining their purpose. According to Costco, both sodium phosphate and carrageenan are used “to support moisture retention, texture, and product consistency during cooking.” The company also pointed out that both ingredients are approved by food safety authorities. Fair enough — nobody’s claiming the chicken is unsafe to eat.
But the more significant move? Costco said it has already removed the signage about preservatives from its warehouses and online presentations. That’s a notable concession. They framed it as maintaining “consistency among the labeling,” which is corporate-speak for “we’d rather just take the signs down than keep fighting about this.” It doesn’t necessarily mean they’re admitting fault. But pulling the signs does suggest they recognized the optics weren’t great.
The “tens of millions” claim
The lawsuit doesn’t hold back on the financial accusations. The complaint states that Costco “has systemically cheated customers out of tens — if not hundreds — of millions of dollars” through the allegedly false advertising. That sounds dramatic, and it kind of is. But when you consider the volume of chickens Costco moves — again, 157 million per year — even small per-unit damages add up fast at scale. If a court determined that each customer overpaid by even a dollar because they were influenced by the “no preservatives” claim, the math gets real serious, real quick.
The plaintiffs are requesting unspecified monetary damages. They’re also asking the court to certify the class to include anyone in the United States who purchased Costco’s rotisserie chicken, plus a subclass of California buyers specifically. That’s potentially an enormous group of people. Whether the court actually certifies a class that broad remains to be seen, but the scope of the request tells you something about how the plaintiffs’ attorneys are framing this.
Wait, the plaintiffs still want to buy the chicken?
This is the part that made me do a double-take. Both women who filed the lawsuit said they plan to purchase Costco’s rotisserie chicken again in the future. One of them added a caveat — she said she “cannot rely on Costco’s preservative-related representations for the product unless those representations are accurate and consistent with the product’s ingredients.” Which is a very lawyer-y way of saying “I still want the chicken, I just want the label to be honest.”
And honestly? That’s kind of the whole point of these consumer protection lawsuits. It’s not that anyone thinks the chicken is dangerous or tastes bad. It’s about the principle that when a company makes a claim — especially one it splashes across in-store signage and website pages — that claim should actually be true. The chicken is still $4.99. It’s still convenient. People clearly love it. They just don’t want to be misled about what’s in it.
The fine print problem
One of the more interesting legal angles here is the argument about where the ingredient information appeared. The complaint specifically calls out the fact that sodium phosphate and carrageenan were listed on the back of the packaging in “smaller and less prominent” print. Meanwhile, the “no preservatives” claim was displayed prominently on in-store signage and the Costco website. The plaintiffs argue that even if the ingredients were technically disclosed, the large-print marketing effectively overrode what was on the label.
This is actually a pretty common tactic in false advertising cases. The legal standard often looks at the “overall net impression” a consumer would walk away with. If somebody sees a giant sign that says “NO PRESERVATIVES” and then buys the chicken without pulling out a magnifying glass to read every ingredient on the back, can you really blame them? The lawsuit is betting that most courts — and most jurors — would say no, you can’t.
Are sodium phosphate and carrageenan actually preservatives though?
This is where things get a little gray, and it’s probably where Costco’s defense will focus. Sodium phosphate does extend shelf life by controlling pH and reducing oxidation. That sure sounds like a preservative function. But Costco’s argument is that they use it primarily for moisture retention and texture — not to preserve the product. It’s a dual-purpose ingredient, which makes the classification tricky.
Carrageenan is similar. It’s widely used as a thickener and stabilizer. WebMD describes it as a “commonly used preservative,” but the food industry often categorizes it differently depending on context. If Costco can argue that these ingredients serve a functional purpose unrelated to preservation — and that food safety regulators don’t classify them as preservatives — that could undercut the lawsuit’s core claim. But the plaintiffs clearly have their own experts ready to argue otherwise. It’ll come down to definitions, and definitions in food labeling law are anything but simple.
This isn’t Costco’s first rotisserie chicken controversy
The $4.99 rotisserie chicken has been a lightning rod before. Over the years, Costco has faced scrutiny over its poultry supply chain, animal welfare practices, and the environmental impact of its chicken operation in Nebraska. The company has gone to extraordinary lengths to keep that price point — including building its own poultry processing plant in Fremont, Nebraska, which opened in 2019. That $4.99 price tag is essentially a loss leader, designed to get people through the door so they’ll spend money on everything else in the store.
So the chicken has always carried a certain amount of baggage despite being one of the most popular prepared foods in America. This latest lawsuit adds another layer. And while the legal outcome is uncertain, the PR hit is already done. When your signature product — the thing people literally plan their Costco trips around — ends up in a court filing, that’s not a great look regardless of the verdict.
What the lawsuit is really asking for
Beyond the money, the plaintiffs want class certification. That’s the big one. If a court agrees to certify this as a class action, it opens the door for potentially millions of Costco shoppers to be included. The proposed class would cover anyone in the U.S. who bought the rotisserie chicken, and there’s a separate subclass for California purchasers. California has some of the strongest consumer protection laws in the country, which is probably why the case was filed there.
The complaint also accuses Costco of violating unfair competition laws by “tricking Plaintiffs and members of the California Subclass into purchasing or alternatively paying a premium for its rotisserie chicken.” Now, calling $4.99 a “premium” price for a whole cooked chicken is a stretch by most people’s standards. But legally, the argument is that customers paid more than they would have if they’d known the “no preservatives” claim wasn’t accurate. Maybe they would’ve bought a different brand. Maybe they would’ve cooked their own. The point is that the false advertising allegedly influenced their purchasing decision.
Should you actually be worried about your Costco chicken?
Let’s be real for a second. Nobody is saying Costco’s rotisserie chicken is unsafe. Sodium phosphate and carrageenan are approved by food safety authorities and are found in tons of processed foods you probably already eat. The FDA hasn’t flagged either ingredient as a health concern at the levels used in food products. This lawsuit is about labeling accuracy and consumer trust — not food safety.
That said, if you’re someone who specifically seeks out foods without preservatives — maybe for dietary reasons, maybe because you just prefer it — then this matters to you. You were making a purchasing decision based on information that may not have been accurate. And that’s exactly the kind of thing consumer protection laws exist to address. The chicken is still delicious. The price is still unbeatable. But the next time you grab one, it’s worth flipping the package over and reading what’s actually in it — because the sign above the warmer might not tell you the whole story.
