What Happens If You Eat An Out Of Date Egg?

Most of the time, nothing happens. If you eat an egg a few days past its printed date and it has been stored in the refrigerator, you will likely notice no difference at all. The date on the carton is not an expiration date in the safety sense — it is a quality date. The egg inside is usually still fine to eat.

That answer changes if the egg was left out, cracked, or stored improperly. In those cases, bacteria can multiply and cause real illness. The gap between “fine” and “risky” comes down to storage and handling, not the number printed on the box.

What Does the Date on an Egg Carton Actually Mean?

The date stamped on a carton is a freshness or sell-by date, not a safety deadline.

In the United States, the USDA requires eggs to carry a pack date — the day they were washed, graded, and placed in the carton. That number is often printed as a three-digit Julian code (001 through 365). A sell-by date is not federally required, but many states mandate one. When a carton shows a sell-by date, it is typically set within 30 days of the pack date.

Here is the part many people miss: properly refrigerated eggs are generally considered safe to eat for three to five weeks after you bring them home, according to USDA food safety guidance. That window is measured from purchase, not from the sell-by date. So an egg a week past its carton date may still have two or more weeks of safe use left.

Refrigeration matters because it slows bacterial growth and preserves the egg’s internal quality. In the US, eggs are washed before sale, which removes a natural protective coating called the bloom. That washing is why American eggs must be refrigerated. In many European countries, eggs are not washed and are stored at room temperature instead. Different handling, different rules.

What Happens If You Eat an Out of Date Egg That Has Gone Bad?

If a spoiled egg is contaminated with Salmonella, eating it can cause a foodborne illness called salmonellosis.

Symptoms typically appear within 6 hours to 6 days after eating the egg, though most people get sick within 12 to 72 hours. Common symptoms include diarrhea, fever, stomach cramps, nausea, and vomiting. In most healthy adults, the illness runs its course in about 4 to 7 days without treatment.

Not everyone gets seriously ill. Many people who eat a contaminated egg have mild symptoms or none at all. Risk rises for certain groups:

• Adults over 65
• Infants and young children
• Pregnant women
• People with weakened immune systems or chronic conditions

For these groups, Salmonella infection can be more severe and may spread beyond the gut into the bloodstream. That is a serious complication requiring medical care. Anyone in these groups who develops symptoms after eating a suspect egg should contact a healthcare provider rather than wait it out.

One important clarification: a bad smell or odd appearance is not proof of Salmonella. The bacteria can be present in a perfectly normal-looking, normal-smelling egg. Spoilage and contamination are two different things. A rotten egg is unpleasant and may make you sick from spoilage organisms, but Salmonella is a separate concern that does not always announce itself.

How Can You Tell If an Egg Has Gone Bad?

Your senses are the most practical tool. A spoiled egg usually gives clear signals.

The clearest sign is smell. A rotten egg has a distinct sulfurous, unpleasant odor. If you crack an egg and smell that, throw it out — do not cook or eat it. Other signs include a pink, greenish, or iridescent discoloration of the white, or a white that is watery and thin rather than thick and firm.

There is also a simple water test. A fresh egg sinks in a bowl of water and lies on its side. As an egg ages, the air pocket inside grows because moisture and gas escape through the porous shell. An older egg may stand upright or float. A floating egg is a sign it is old — but floating does not automatically mean it is unsafe. It means the air cell has grown large. Use smell and appearance as your final check.

One caution: never use the water test as your only measure, and never crack an egg directly into a bowl of other ingredients. Crack it into a separate small bowl first. That way, if it is bad, you have not ruined the whole batch.

Does Cooking Make an Old Egg Safe to Eat?

Thorough cooking kills Salmonella, but it does not fix spoilage.

If an egg is contaminated with Salmonella but still looks and smells normal, cooking it until both the white and yolk are firm will reduce the risk. The USDA recommends cooking eggs until yolks and whites are firm, and reheating leftovers to 165°F. Raw or runny eggs carry more risk, especially for the groups listed above.

But cooking does not rescue a genuinely spoiled egg. The compounds that make a rotten egg smell bad are not destroyed by heat, and eating a spoiled egg can still make you sick even after cooking. If it smells wrong, cooking it does not make it right.

This is where a lot of people get confused. There are two separate questions: “Is this egg contaminated with a pathogen?” and “Has this egg spoiled?” Cooking addresses the first. Nothing addresses the second except throwing the egg away.

When Should You Actually Throw an Egg Away?

Throw the egg out if it smells rotten, looks discolored, or has a shell that is cracked and has been sitting out.

A cracked egg is a genuine risk because bacteria can enter through the break. If you notice a crack before cooking, and the egg has been at room temperature, discard it. If a crack happens while you are cooking and you use the egg immediately, the risk is lower but not zero.

Eggs left at room temperature for more than two hours should be discarded, per standard food safety guidance. That two-hour window is a well-established threshold for perishable foods. In hot conditions above 90°F, that window shrinks to one hour.

Here is a quick reference for common situations:

Notice that the carton date does not appear in this table as a deciding factor. That is intentional. Storage and condition matter more than the printed number.

How Should You Store Eggs to Make Them Last?

Keep eggs refrigerated at 40°F or below, and leave them in their original carton.

The carton protects eggs from odors and temperature swings, and it keeps the pack date visible so you can track freshness. Store them in the main body of the refrigerator, not in the door, where the temperature fluctuates each time the door opens.

Do not wash eggs at home before storing them. Commercial washing already happened before the eggs reached the store, and re-washing at home can push bacteria through the shell. If an egg is dirty, wipe it with a damp cloth just before using it, not before storing it.

Freezing is another option. You can freeze eggs, but not in the shell — the liquid expands and cracks it. Crack them into a container, beat them lightly, and freeze. Frozen eggs are best used within a year for quality, though food safety guidance generally supports longer storage for safety.

The Bottom Line on Out of Date Eggs

An out of date egg is usually a non-event. The date is about quality, not safety, and refrigerated eggs typically stay safe well past it. Your nose and eyes are better guides than the stamp on the box.

The real risks come from poor storage, cracks, and leaving eggs at room temperature. If an egg smells fine, looks fine, and has been kept cold, eating it past its date is generally low risk for a healthy adult. If it smells rotten, throw it out — the date has nothing to do with that decision.