Costco's $4.99 Rotisserie Chicken Is at the Center of a Heated Legal Battle Over What "No Preservatives" Actually Means
It sits in a heated display case near the exit of virtually every Costco warehouse in America, spinning behind glass in its familiar golden-brown glory: the Kirkland Signature Seasoned Rotisserie Chicken. Priced at $4.99 since 2009, it has become one of the most iconic food items in American retail — a loss-leader that drives foot traffic, a dinner staple for millions of households, and now the unlikely centerpiece of a federal class action lawsuit that goes straight to the heart of how the food industry defines its own ingredients. The dispute, which pits two California shoppers against one of the world's largest retailers, raises questions that matter well beyond Costco's warehouse walls: When a company labels a product "No Preservatives," what legal and scientific obligations does that claim actually carry?
The Lawsuit That Started It All
The proposed class action was filed on January 22 in the U.S. District Court for the Southern District of California. The complaint alleges that Costco's Kirkland Signature Seasoned Rotisserie Chicken contains two added preservatives — sodium phosphate and carrageenan — in direct contradiction of the product's prominent "No Preservatives" marketing. The two named plaintiffs, Bianca Johnston and Anatasia Chernov, are represented by the Almeida Law Group and are seeking to represent a sweeping national class.
The proposed class alleges that Costco "has systemically cheated customers out of tens — if not hundreds — of millions of dollars by falsely advertising its Kirkland Signature Seasoned Rotisserie Chicken as containing 'no preservatives.'" It is an ambitious legal target. If certified by the court, the class would include anyone in the United States who purchased Costco's rotisserie chicken, with the plaintiffs' attorneys also asking the court to approve a subclass consisting of customers who bought the chicken specifically in California.
According to the lawsuit, the rotisserie chicken contained carrageenan and sodium phosphate despite the "no preservatives" label, which the suit argues violates Washington's Consumer Protection Act, California's Consumers Legal Remedies Act, and other statutes. In addition to accusing Costco of violating false advertising and consumer protection laws, the complaint says the retailer broke unfair-competition laws by engaging in "unfair business acts and practices by tricking plaintiffs and members of the California Subclass into purchasing or alternatively paying a premium" for the product.
As proof, the complaint includes a photo of an in-store advertisement for Costco's Kirkland Signature Seasoned Rotisserie Chicken, which says the $4.99 food product contains no preservatives, no artificial flavors or colors, no MSG and no gluten. That signage, combined with online product listings making similar claims, forms the evidentiary backbone of the plaintiffs' case.
What Are Sodium Phosphate and Carrageenan, Exactly?
To understand what is actually being argued, it helps to know what these two ingredients do — and why their classification is genuinely contested territory.
Carrageenan: Seaweed With a Complicated Reputation
Carrageenan, derived from seaweed, is commonly used in processed foods as a thickener and stabilizer. It appears in everything from deli meats to salad dressings to infant formula and has been approved for food use by the FDA for decades. FDA regulations classify carrageenan as an emulsifier, stabilizer, or thickener rather than a preservative — a technical distinction that sits at the core of Costco's defense. That said, the ingredient has a history of controversy. Some nutrition researchers and consumer advocacy groups have raised concerns about its potential to promote inflammation in the gastrointestinal tract, though regulatory bodies in the United States have consistently maintained its safety for consumption.
Carrageenan is an additive made of seaweed that thickens and preserves processed foods — and that dual-function nature is exactly what makes it legally ambiguous. The plaintiffs argue that because it can, in certain applications, slow spoilage, it effectively acts as a preservative regardless of how the FDA categorizes it. Costco's legal team fires back that consumer-label claims must be grounded in regulatory definitions, not alternative scientific interpretations.
Sodium Phosphate: The Workhorse Additive
Sodium phosphate serves multiple functions in food production, including thickening, curing, leavening, and emulsifying. Sodium phosphate is often used to extend shelf life and help meat maintain moisture. That shelf-life function is what the plaintiffs latched onto. The complaint alleges the chicken contains sodium phosphate, a preservative that controls pH and reduces fat oxidation, effectively slowing microbial growth and spoilage. It is a reasonable-sounding argument on its surface — but it runs directly into the FDA's own ingredient classification system, which does not list sodium phosphate among substances defined as preservatives.
What we are really watching here is a collision between two very different ways of defining a word. The food industry, backed by federal regulators, draws sharp categorical lines between functional ingredient classes: preservatives, emulsifiers, stabilizers, thickeners, flavor enhancers. Plaintiffs' attorneys — and an increasingly label-conscious consumer base — are pushing back and saying that function, not category, should define a claim. If an ingredient slows spoilage, does it matter what box the FDA puts it in?
Costco Fires Back: "Fatally Flawed"
In a motion filed June 4 in the U.S. District Court for the Southern District of California, Costco argued that plaintiffs Bianca Johnston and Anatasia Chernov failed to plausibly allege that consumers were misled by signage advertising the rotisserie chicken as containing no preservatives.
Charles Sipos, the attorney representing the Issaquah-based warehouse club, called the plaintiffs' argument about false advertising "fatally flawed" because carrageenan and sodium phosphate are not categorized as preservatives by the U.S. Food and Drug Administration's regulations. Sipos argued that the two additives are not defined as preservatives in FDA regulations, and that they are "unambiguously" mentioned in the ingredients list as part of the meat's seasoning.
The motion also takes aim at the economic injury claims underpinning the lawsuit's class action viability. According to the motion, the lawsuit relies on a "price premium" theory, claiming consumers paid more because of the "No Preservatives" statement. Sipos systematically dismantled that argument with a pointed observation: "They allege that Costco's 'No Preservatives' statement enabled the company to charge more for Rotisserie Chicken," Sipos wrote in the motion. "Yet, the Amended Complaint does not identify a single 'competitor' who prices a whole rotisserie chicken for sale for less than $4.99." In other words, if Costco's "clean label" claim were truly inflating the price, there would presumably be cheaper alternatives on the market. There aren't — and that undercuts the entire price-premium theory.
Costco said that claim is further contradicted by the plaintiffs' own allegations that the company removed the disputed language after the lawsuit was filed while maintaining the chicken's $4.99 price. Sipos countered that claim in the latest filing, saying that the long-standing price of $4.99 didn't change after Costco removed the "no preservatives" label in the wake of the lawsuit. If the label were propping up a premium price, logic suggests its removal would have led to a price reduction. The sticker stayed the same.
The Standing and Pleading Challenges
Costco also contended the plaintiffs failed to meet heightened pleading standards for fraud-based claims, did not adequately allege reliance on statements appearing on Costco's website, and lack standing to seek injunctive relief because they are now aware of the ingredients they challenge. This last point is a nuanced but important one in class action law. Injunctive relief — court-ordered cessation of the behavior — generally requires that a plaintiff face a real and ongoing threat of harm. Once a plaintiff acknowledges they know what is in the product and still plan to buy it, courts have historically questioned whether they have standing to demand the labeling be changed.
And on that note, the plaintiffs' own admissions make for fascinating reading. According to USA Today, the two customers who initiated the lawsuit said they still plan to purchase the rotisserie chicken again, yet one noted that she "cannot rely on Costco's preservative-related representations for the product unless those representations are accurate and consistent with the product's ingredients." It is the kind of admission that Costco's legal team will likely exploit — if the product genuinely harmed or defrauded these consumers, why would they return to buy it?
The company asked the court to dismiss the amended complaint with prejudice, arguing further amendment would be futile. A dismissal with prejudice would mean the plaintiffs cannot refile the same claims — the case would be dead on arrival. A hearing on the motion is scheduled for August.
Costco Quietly Pulled the Signage Anyway
Before the legal back-and-forth reached its current fever pitch, Costco made a quiet but telling move. Costco said in a statement to USA Today on January 28 that the company had removed the signage. "To maintain consistency among the labeling on our rotisserie chickens and the signs in our warehouses and online presentations, we have removed statements concerning preservatives from the signs and online presentations," the company said.
Costco stated: "We use carrageenan and sodium phosphate to support moisture retention, texture, and product consistency during cooking. Both ingredients are approved by food safety authorities." The statement is measured and deliberate. Costco is not conceding that the ingredients are preservatives — far from it. Rather, the company is choosing to sidestep the label fight entirely by removing the claim rather than defending it in every aisle. It is a practical move, but plaintiffs' attorneys will almost certainly argue it signals an implicit acknowledgment that the advertising was misleading. Costco will equally certainly argue it was a voluntary housekeeping measure with no legal significance.
The Broader "Clean Label" Wars
This lawsuit does not exist in a vacuum. It is one front in a much larger legal and cultural battle over what the food industry calls "clean label" marketing — the practice of affixing positive attribute claims like "natural," "no preservatives," "no artificial ingredients," or "minimally processed" to products to capture the wallets of health-conscious consumers.
While the plaintiffs attest Costco falsely capitalized on consumer demand for a "clean label," the company maintains the substances are merely part of the chicken's seasoning. That framing reflects a real tension in the food marketplace. Clean label marketing has exploded over the past decade as consumers — particularly younger, more affluent shoppers — prioritize perceived food quality and ingredient transparency. Brands have responded by reworking recipes and reformulating products, but also, critics argue, by applying feel-good labels to products that do not fully earn them.
The plaintiffs' legal team has articulated this consumer concern directly. "Consumers reasonably rely on clear, prominent claims like 'No Preservatives,' especially when deciding what they and their families will eat," Almeida Law Group partner Wesley M. Griffith said in a statement after the lawsuit was initially filed. It is a rhetorically effective argument — and it resonates because it is largely true. Most Americans are not reading ingredient lists cross-referenced with FDA classification schedules when they grab a rotisserie chicken on their way out of Costco. They are reading the big, bold claim on the sign and trusting it.
The question is whether that trust, when it turns out to be technically misplaced, constitutes a legally actionable wrong — especially when regulators have not defined those ingredients as preservatives and the company's full ingredient list was always disclosed on the product's packaging.
The Economics of the World's Most Famous $4.99 Chicken
Any serious look at this case has to grapple with the peculiar economics of Costco's rotisserie chicken program. Costco has held the price of its rotisserie chicken at $4.99 for over fifteen years, absorbing losses on the product because it generates foot traffic and memberships. The retailer reportedly sells tens of millions of these birds annually and has even built its own poultry farming operation in Nebraska to better control the supply chain and keep the price pegged where it is.
That context makes the plaintiffs' price-premium theory look particularly shaky under scrutiny. The plaintiffs' attorneys, Almeida Law Group, allege the "no preservatives" claim allowed Costco to charge a premium price. Costco, however, disputes that argument. Sipos stated in the filing that the amended complaint does not identify a single competitor who prices a whole rotisserie chicken for sale for less than $4.99. Costco is not charging a premium for this product — by virtually any measure, it is selling it below market cost as a strategic loss-leader. The argument that a "no preservatives" sticker on a $4.99 item represents unjust enrichment is an uphill climb in any courtroom.
Costco said the plaintiffs' own sources and FDA regulations undermine their argument. The company noted that neither sodium phosphate nor carrageenan appears among substances commonly identified as preservatives and that FDA regulations classify carrageenan as an emulsifier, stabilizer, or thickener rather than a preservative. Costco also argued the product's label clearly identifies both ingredients as components of the seasoning blend. This points to another inconvenient reality for the plaintiffs: if a shopper had any genuine concern about these additives, the full ingredient list was printed on the product the entire time.
What Happens in August — and What It Means Going Forward
The hearing scheduled for August will be a pivotal moment. Federal district courts assess dismissal motions under Rule 12(b)(6) of the Federal Rules of Civil Procedure, asking whether the complaint, taken as true, states a plausible claim for relief. Costco's team is arguing the answer is no on multiple grounds: no misleading label under regulatory definitions, no demonstrable economic injury, no valid price premium theory, and no standing to seek injunctive relief. If the judge agrees on any one of those grounds — let alone all of them — the case could be wiped from the docket entirely, especially given the motion for dismissal with prejudice.
In a statement after filing the lawsuit in January, the plaintiffs' attorneys also accused Costco of having "systemically cheated customers out of tens — if not hundreds — of millions of dollars" by advertising their Kirkland Signature Seasoned Rotisserie Chickens as being preservative-free. That language is pointed toward media coverage and class certification optics as much as it is toward a federal judge. Class action suits targeting major consumer brands live and die by public perception as much as legal precision — and a headline about Costco misleading shoppers on health claims is damaging regardless of how the legal arguments ultimately resolve.
If the court allows the case to proceed, discovery could get messy for Costco. Internal communications about the decision to add carrageenan and sodium phosphate to the seasoning mix, marketing strategy documents discussing the "no preservatives" claim, and financial data on the chicken program's economics could all become fair game. That exposure often drives companies toward settlement even when their legal position is strong.
If the case is dismissed, it will be cited by food companies across the country as a precedent for the proposition that "no preservatives" claims, when grounded in FDA classification rather than informal ingredient function, are legally defensible. That would be a significant win not just for Costco, but for the broader food industry's ability to use clean-label marketing without fear of litigation over every ingredient that could theoretically slow spoilage in a secondary context.
The Consumer Takeaway
For the millions of Americans who pick up a Costco rotisserie chicken on a regular basis, the practical implications are limited. The bird has not changed. The price has not changed. The ingredients have been disclosed on the label throughout the entire controversy. What has changed is the in-store signage, which no longer makes any claims about preservatives one way or the other — a quiet acknowledgment that the cleanest path forward, legally speaking, is to let the ingredient list speak for itself.
The deeper takeaway, though, is worth sitting with. "Consumers reasonably rely on clear, prominent claims like 'No Preservatives,' especially when deciding what they and their families will eat," Almeida Law Group partner Wesley M. Griffith said. That reliance is real, widespread, and largely unexamined. Most Americans lack the regulatory literacy to know that "no preservatives" on a food label is a claim defined not by common sense but by a federal classification system that has its own internal logic — and its own gaps.
Whether carrageenan and sodium phosphate are "really" preservatives depends entirely on who you ask and which framework they are using. A food scientist might give one answer, an FDA regulator another, a plaintiff's attorney a third. The federal court in San Diego will soon have to pick one — and whichever way it lands, the food industry will be watching closely. The Costco rotisserie chicken has survived price pressures, supply chain disruptions, and a pandemic. It may well survive this lawsuit too. But the questions it has raised about ingredient transparency, label integrity, and consumer trust are not going anywhere.
