Rice Left Out Overnight: Is It Safe?
Written by Jordan Morley · Reviewed against FSA chilling & danger-zone guidance · Last updated 28 October 2026
Absolutely not — rice left out overnight must be thrown away. Rice is one of the riskiest foods to leave at room temperature.
Why overnight is too long
Cooked rice can contain spores of Bacillus cereus that survive cooking. At room temperature the spores germinate, and the growing bacteria can produce a toxin, and reheating rice does not kill the bacteria (Healthline). This is why rice has the strictest handling advice of any common food: cool it within 1 hour, refrigerate, eat within 24 hours. Overnight on the counter, rice is a genuine food poisoning risk ('fried rice syndrome') and must go in the bin.
You can also check the calorie content of rice alongside its safety information.
Cooked rice: the time limits
| Step | Limit | Why |
|---|---|---|
| Cool and refrigerate | Within 1 hour of cooking | Bacillus cereus spores survive cooking and grow at room temperature |
| Fridge life | Up to 24 hours | FSA / NHS guidance |
| Reheat | Once only, piping hot | Do not count on reheating to undo growth that already happened |
| Left out 2 hours or more | Throw away | Past the 1-hour limit |
| Left out overnight | Throw away | Even reheating will not make it safe |
Spreading rice thin on a tray cools it fast. Frozen portions keep longer; see our freezing page.
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Rice: the other answers on this site
| Question | Short answer (links to the full page) |
|---|---|
| In pregnancy | Safe |
| Reheating | Yes — with caution |
Common questions
Can I reheat rice left out overnight until it's really hot?
No. Reheating rice does not kill Bacillus cereus bacteria, so heat cannot make rice left out overnight safe. Throw it away.
What is fried rice syndrome?
It's the common name for Bacillus cereus food poisoning — typically vomiting within 1–5 hours of eating rice that sat at room temperature. It comes on fast and is thoroughly unpleasant.
My rice sat out for 2 hours. Can I still eat it?
The FSA's rice advice is to cool it and get it in the fridge within 1 hour of cooking. After 2 hours, it is past that. Throw it away: reheating is not a reliable fix, because Bacillus cereus can produce a toxin as it grows (Food Standards Scotland; Healthline says reheating does not kill the bacteria).
What about rice in a rice cooker on 'keep warm'?
Keep-warm settings hold rice at a safe temperature for a limited time (often 12 hours or less, check your appliance), but rice that has been switched off and left in the pot overnight is in the same danger zone as any other cooked rice and should go in the bin.
How should I store rice to avoid this?
Cool within 1 hour (spread it on a tray), refrigerate in a sealed container, eat within 24 hours, and reheat once until steaming hot. Or freeze portions straight away.
How long does rice last if it IS stored properly?
No more than 24 hours in the fridge (NHS/FSA guidance), after being cooled within 1 hour of cooking. Frozen portions keep much longer: see our freezing page for cooked rice.
Related answers
Primary source: FSA chilling & danger-zone guidance.
General information only, not medical advice: see the medical disclaimer. Feeling unwell after eating something? Contact NHS 111 or your GP.