How Long Does Sourdough Bread Last?
Naturally leavened bread made with a sourdough starter culture.
The Short Answer
Sourdough Bread lasts 7–10 days in the refrigerator when stored properly at 40°F or below. For longer storage, sourdough bread can be frozen for 3–6 months while maintaining good quality. At room temperature in the pantry, expect 3–5 days under normal conditions. 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 | Our methodology
Sourdough's natural acidity gives it a built-in mold resistance that conventional bread lacks. It also stales differently, going hard and dry rather than soft and moldy. Hard sourdough makes excellent breadcrumbs, croutons, or French toast.
How to Store Sourdough Bread
Store cut-side down on a cutting board or in a paper bag at room temperature. Sourdough lasts longer than conventional bread because the natural acids from fermentation inhibit mold growth. Avoid storing in plastic at room temperature, which traps moisture and accelerates mold. For longer storage, slice and freeze.
How to Tell if Sourdough Bread Has Gone Bad
Look for these signs that sourdough bread has spoiled: mold, excessively hard or stale texture, off smell (beyond normal sourdough tang)
The Professor's rule: When in doubt, throw it out. No meal is worth food poisoning.
The Bottom Line
Properly stored sourdough bread stays safe for 7–10 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
The lactic and acetic acids produced during sourdough fermentation lower the bread's pH, creating an environment that inhibits mold growth. This natural preservation is why sourdough was the standard bread for centuries before commercial yeast and preservatives.