Costco Rotisserie Chicken Lawsuit Explained: Does It Really Contain Preservatives?

Costco’s famous rotisserie chicken is inexpensive, convenient and consistently juicy. But in 2026, the popular $4.99 chicken became the subject of a proposed class-action lawsuit over one short advertising claim: “No Preservatives.”

The U.S. product discussed in the lawsuit contains sodium phosphate and carrageenan. The plaintiffs argue that these ingredients perform preservative functions and that Costco’s former advertising could therefore have misled reasonable consumers.

Costco disputes that interpretation. The company says the ingredients are used for moisture retention, texture and cooking consistency—not as preservatives.

So, does Costco rotisserie chicken actually contain preservatives?

The ingredients are not illegal, and the lawsuit does not establish that the chicken is unsafe. The unresolved question is whether Costco’s former “No Preservatives” advertising could have misled reasonable consumers.

Has Costco settled the lawsuit?

Key Facts at a Glance

  • The lawsuit was filed in California federal court on January 22, 2026.
  • It challenges Costco’s former “No Preservatives” advertising.
  • The ingredients at issue are sodium phosphate and carrageenan.
  • Costco and the plaintiffs disagree about whether those ingredients perform preservative functions.
  • No court has ruled that Costco’s advertising was false, and no settlement has been announced.

What Is the Costco Rotisserie Chicken Lawsuit About?

Two California consumers filed the case Johnston et al. v. Costco Wholesale Corporation in the U.S. District Court for the Southern District of California.

According to the complaint, Costco previously promoted its Kirkland Signature Seasoned Rotisserie Chicken using “No Preservatives” language on warehouse signs and in online presentations.

The plaintiffs allege that this wording could have led reasonable consumers to believe that the chicken contained no added ingredients performing a preservative function.

Their claims focus primarily on two disclosed ingredients:

  • Sodium phosphate
  • Carrageenan

The plaintiffs argue that these substances can help preserve qualities such as moisture, texture or stability. On that basis, they claim the former “No Preservatives” message was misleading.

These claims remain allegations and have not been proven in court.

What Is the Current Status of the Lawsuit?

The original complaint was filed on January 22, 2026, and the plaintiffs later filed an amended complaint.

Costco filed a motion to dismiss the amended complaint in June 2026. As of July 23, 2026, the court had not ruled that Costco’s advertising was false.

  • No consumer class had been certified.
  • No settlement had been announced.
  • No consumer claims process had opened.

This is a pending advertising lawsuit, not a final judgment against Costco.

Why Did Costco Remove the “No Preservatives” Wording?

Costco removed preservative-related statements from its warehouse signs and online presentations.

The company said it made the change to maintain consistency between its product labeling, warehouse signs and online information.

The removal does not, by itself, establish that Costco’s earlier advertising violated any law or regulation. It also does not amount to an admission of wrongdoing.

It confirms only that Costco chose to discontinue the disputed wording while the legal and labeling issues remain unresolved.

Which Costco Chicken Ingredients Are Being Disputed?

The lawsuit does not allege that Costco secretly added unlisted ingredients. Instead, the dispute concerns whether two disclosed ingredients were consistent with the separate “No Preservatives” advertising claim.

Sodium Phosphate

Sodium phosphates are widely used in processed meat and poultry products.

According to the U.S. Department of Agriculture’s Food Safety and Inspection Service, phosphates can provide two important effects in meat and poultry:

  • Moisture retention
  • Flavor protection

Meat naturally loses water during cooking as heat causes its proteins to contract. Phosphates can improve water-binding capacity, helping the meat retain more moisture.

This may contribute to juicier meat, less moisture loss and a more consistent texture.

However, the fact that an ingredient helps retain moisture or protect flavor does not automatically determine whether it must legally be described as a preservative. Its regulatory classification and intended function in the specific product may also matter.

Carrageenan

Carrageenan is derived from certain types of red seaweed.

Under U.S. federal regulations, carrageenan may be used in food as an:

  • Emulsifier
  • Stabilizer
  • Thickener

In food production, carrageenan can help bind water, stabilize a mixture and support a more uniform texture.

In cooked meat products, those properties may help retain moisture and maintain consistency during cooking or while the food is held warm for sale.

The lawsuit focuses on whether Costco’s former “No Preservatives” claim could have misled consumers despite carrageenan’s stated use as a stabilizer or thickener.

What Does Costco Say?

Costco rejects the plaintiffs’ characterization of sodium phosphate and carrageenan as preservatives in its rotisserie chicken.

The company says the ingredients are used to support:

  • Moisture retention
  • Texture
  • Consistency during cooking

Costco also argues that the sources cited by the plaintiffs do not officially classify the ingredients as preservatives. It therefore contends that reasonable consumers were not deceived by the former advertising.

Costco further argues that the plaintiffs have not plausibly shown that customers paid a price premium because of the disputed wording. The company notes that its rotisserie chicken remained priced at $4.99 after the preservative-related signage was removed.

The plaintiffs disagree. The court has not yet ruled on whether their claims are legally sufficient.

Is a Moisture-Retention Ingredient a Preservative?

Not necessarily.

Food additives can serve more than one technical purpose. An ingredient may affect moisture, texture, stability or shelf life without necessarily being classified or used as a preservative in every product.

Consumers may understand the word “preservative” broadly, while food manufacturers and regulators may classify an ingredient according to its intended technical function.

This difference is central to the Costco rotisserie chicken lawsuit.

The legal issue is not simply whether sodium phosphate or carrageenan can help food maintain certain qualities. The issue is whether Costco’s former advertising could have misled a reasonable consumer in the context of the product’s actual formulation and labeling.

Why Is Costco Rotisserie Chicken So Juicy?

Costco rotisserie chicken’s moist texture may result from a combination of cooking technique and product formulation.

Commercially prepared poultry may be seasoned or treated with a solution containing water, salt and other functional ingredients before cooking.

Depending on the recipe, ingredients such as salt, starches, phosphates or carrageenan may help meat retain water and maintain a consistent texture.

Possible effects include:

  • Reduced moisture loss during roasting
  • Softer and juicier meat
  • More even seasoning
  • Greater consistency between individual chickens
  • Less drying while the chicken is held warm

A juicy commercial rotisserie chicken may therefore reflect several factors, including the raw chicken, added solution, ingredient formulation, cooking temperature and warm-holding conditions.

This does not mean the ingredients are illegal or unsafe. It means that commercial food texture is often influenced by formulation as well as cooking.

Is Costco Rotisserie Chicken Unsafe?

The lawsuit does not establish that Costco rotisserie chicken is unsafe, and it is not a food-recall announcement.

The case concerns advertising and consumer interpretation. It is not a court finding that the ingredients are prohibited or that the chicken is dangerous.

Carrageenan is permitted for food use under specified U.S. federal conditions. Phosphates are also commonly used in meat and poultry processing for purposes that include moisture retention and flavor protection.

Regulatory approval and advertising accuracy are separate issues.

A food product may contain lawfully permitted additives while still becoming the subject of a dispute over how it was marketed. Likewise, the presence of a food additive does not, by itself, prove that a product is harmful.

Does Costco Canada Use the Same Ingredients?

Not according to the ingredient list reviewed for this article.

At the time of verification, Costco Canada’s same-day product page listed the ingredients for its Seasoned Rotisserie Chicken as:

Chicken, water, salt, rice starch, sugar, vegetable oil, tetrapotassium pyrophosphate, sodium triphosphate, spices and silica.

Carrageenan was not listed on that Canadian product page.

The Canadian ingredient list did include two phosphate ingredients:

  • Tetrapotassium pyrophosphate
  • Sodium triphosphate

Phosphate ingredients may assist with water retention and texture.

The U.S. lawsuit should therefore not be presented as proof that Costco rotisserie chicken sold in Canada contains the exact same formulation as the U.S. product described in the case.

Recipes can differ by country, region, supplier or production facility. They may also change over time. Consumers should check the ingredient label on the specific chicken sold at their local warehouse.

What Should Consumers Check?

Promotional phrases such as “No Preservatives,” “All Natural” or “No Artificial Ingredients” can strongly influence purchasing decisions, but they do not provide the same information as a complete ingredient list.

Consumers who want to avoid a specific additive should check the full ingredient list on the actual product rather than relying only on a front-facing advertising claim.

This is especially important for internationally sold products because the same product name does not guarantee an identical recipe in every country.

Frequently Asked Questions

Does Costco rotisserie chicken contain preservatives?

That question remains disputed in the United States.

The plaintiffs argue that sodium phosphate and carrageenan perform preservative functions. Costco says the ingredients are used for moisture retention, texture and cooking consistency rather than as preservatives.

No court has yet ruled that Costco’s former advertising was false.

Does Costco rotisserie chicken contain carrageenan?

Court filings in the U.S. case describe the product at issue as containing carrageenan.

The Costco Canada ingredient list reviewed for this article did not list carrageenan. U.S. and Canadian recipes should not be assumed to be identical.

Why is sodium phosphate added to chicken?

Phosphates can help meat retain moisture and protect flavor. This may produce juicier meat and a more consistent texture after cooking.

Is Costco rotisserie chicken unsafe or under recall?

The lawsuit does not establish that the chicken is unsafe, and it is not itself a food-recall announcement. The case concerns whether Costco’s former advertising could have misled consumers.

Did Costco admit that its advertising was false?

No. Costco removed the disputed wording but continues to deny the plaintiffs’ allegations. Removing an advertising claim does not, by itself, amount to an admission of liability.

Is there a Costco rotisserie chicken settlement?

No verified settlement or consumer payment process had been announced as of July 23, 2026.

Consumers should be cautious of websites claiming that payments are already available or that settlement claims can already be submitted.

The Bottom Line

The Costco rotisserie chicken lawsuit is more complicated than the headline “preservatives found in Costco chicken” suggests.

A proposed class-action lawsuit challenges Costco’s former “No Preservatives” advertising. The U.S. product described in the case contains sodium phosphate and carrageenan.

Costco says the ingredients are used to retain moisture and maintain texture and cooking consistency. The plaintiffs argue that the ingredients nevertheless perform preservative functions and that consumers could have been misled.

No court has ruled that Costco’s advertising was false. The case also does not establish that the chicken is unsafe or that the ingredients are illegal.

For shoppers, the practical lesson is straightforward: marketing language provides only part of the information. Check the complete ingredient list, and remember that the same product may have a different formulation in another country.

Sources

Information and case status were verified as of July 23, 2026. This article summarizes publicly available court records, regulatory information and the parties’ publicly reported positions regarding pending litigation. It does not state or imply that Costco has been found liable or that any allegation has been proven in court. Product ingredients may change, and consumers should verify the label on the product available at their local warehouse.

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