How Long Does Simple Syrup Last?
Sugar dissolved in water, used in cocktails, iced coffee, and baking.
The Short Answer
Simple Syrup lasts 14–30 days in the refrigerator when stored properly at 40°F or below. For longer storage, simple syrup can be frozen for 3–6 months while maintaining good quality. These times are based on USDA food safety guidelines and assume proper storage conditions.
Storage Times at a Glance
Source: USDA FoodKeeper | Last verified: March 26, 2026
Rich simple syrup (2:1 sugar to water) lasts about twice as long as standard simple syrup in the refrigerator. If you make cocktails at home, the 2:1 ratio is worth the extra sugar for the convenience of longer shelf life.
How to Store Simple Syrup
Store in a clean, sealed glass jar or bottle in the refrigerator. A higher sugar ratio (2:1 sugar to water, called rich simple syrup) lasts longer than standard 1:1 because the higher sugar concentration inhibits bacterial growth. Adding a small amount of vodka (1 tablespoon per cup) also extends shelf life.
How to Tell if Simple Syrup Has Gone Bad
Look for these signs that simple syrup has spoiled: look for these signs that simple syrup has spoiled: cloudiness, mold, fermented or alcoholic smell, bubbling, off taste
The Professor's rule: When in doubt, throw it out. No meal is worth food poisoning.
The Bottom Line
Properly stored simple syrup stays safe for 14–30 days in the fridge. Always store in airtight containers, refrigerate within 2 hours of purchase or preparation, and trust your senses. If something looks, smells, or feels off, discard it regardless of how many days it has been. Freezing is always an option if you will not use it within the refrigerator window.
Frequently Asked Questions
Use a 2:1 sugar-to-water ratio (rich simple syrup), store in a sterilized glass container, and add 1 tablespoon of vodka per cup. This combination can extend shelf life to a month or more in the refrigerator.