Is pizza left out overnight safe to eat?
No, pizza left out overnight isn't safe to eat. USDA guidance caps room temperature time at two hours, so it has to be thrown out even if it still looks and smells fine.
No, pizza left out overnight isn't safe to eat. USDA guidance caps room temperature time at two hours, or one hour above 90°F, and that limit applies even to pizza with no meat on it. Overnight is well past that window, plenty of time for bacteria to reach unsafe levels.
How long can pizza sit out before it goes bad?
The USDA's two-hour rule applies here: any perishable, cooked food needs to go back into the fridge within two hours of being cooked or served, or it gets thrown out. Cheese, sauce, and dough all count as perishable, so the rule applies to a plain cheese pizza just as much as one loaded with meat.
| Situation | Safe time limit | What to do |
|---|---|---|
| Room temperature, below 90°F | Up to 2 hours | Refrigerate within 2 hours, or toss it |
| Hot room or outdoors, above 90°F (car, patio, summer cookout) | Up to 1 hour | Refrigerate within 1 hour, or toss it |
| Left out overnight (roughly 6 to 12 hours) | Unsafe | Throw it out, do not eat or refrigerate it |
| Reheated after sitting out too long | Still unsafe | Reheating will not fix it. Throw it out |
That two-hour clock doesn't pause because the box is closed, the room feels cool, or the pizza still looks fine in the morning. For general shelf-life numbers on other foods, our guide to how long food lasts walks through the basics for the fridge, freezer, and pantry.
How to tell if pizza has gone bad
Once pizza has been properly refrigerated, watch for the usual signs of spoilage: a sour or off smell, a slimy feel on the cheese or toppings, dark or discolored patches, or any visible mold, which can show up as fuzzy white, green, or black spots.
The bacteria responsible for food poisoning, including Staphylococcus aureus and Salmonella, don't reliably change how food looks, smells, or tastes. Pizza that has sat out too long can seem completely normal and still make you sick, which is why the time limit matters more than how the pizza looks or smells. The same gap between "looks fine" and "is fine" shows up with raw proteins too, so how long raw chicken lasts in the fridge is worth a look.
How to store it so it lasts
- Get it into the fridge within 2 hours of cooking or delivery (1 hour if the room is above 90°F).
- Wrap slices tightly in foil or plastic wrap, or use an airtight container.
- Keep your fridge at 40°F or below.
- Eat refrigerated leftover pizza within 3 to 4 days.
- Reheat to an internal temperature of 165°F before eating.
Cooked rice follows a similar clock once it's off the stove. If you want the exact numbers, see how long cooked rice lasts in the fridge. If you tend to lose track of which box has been in there three days versus one, logging the date in a fridge app like Well Stockd's food expiration tracker is an easy way to catch leftovers before they age past that four-day mark.
Can you freeze pizza?
Yes. Freeze it within the same 2-hour window used for refrigerating, either straight from the counter or before it hits day 4 in the fridge. Wrap slices individually or lay them flat in a single layer before bagging, then use a freezer bag or airtight container and press out as much air as possible.
Frozen pizza is at its best quality within 1 to 2 months, though it stays safe to eat indefinitely as long as your freezer holds at 0°F or below. Reheat straight from frozen, or thaw in the fridge first, and bring it back to 165°F internal temperature before eating.
When in doubt, throw it out
It's the USDA's own advice, and there's a good reason for it: you can't taste-test your way to safety. Most bacteria that cause food poisoning don't change how food smells or tastes. If you're not sure how long that pizza sat out, the safe call is to throw it away rather than gamble on it.
Frequently asked questions
Does the two-hour rule still apply if the pizza has no meat on it? Yes. The two-hour limit applies regardless of topping. Cheese, sauce, and dough are perishable enough on their own to support bacterial growth.
Will reheating pizza that sat out overnight make it safe again? No. Cooking kills most bacteria, but some, including Staphylococcus aureus, produce toxins that survive normal cooking and reheating temperatures. Once food has been in the danger zone too long, reheating won't undo that.
Is it fine as long as I refrigerate it as soon as I notice it the next morning? No. Once perishable food has spent more than two hours between 40°F and 140°F, known as the danger zone, refrigerating it afterward does not reverse the bacterial growth that already happened.
Updated July 2026.
Sources: FSIS: Leftovers and Food Safety, FSIS: "Danger Zone" (40°F - 140°F), FSIS: Safe Handling of Take-Out Foods, Ask USDA: What is the 2-Hour Rule with leaving food out, FoodSafety.gov: FoodKeeper App.