Best Before vs Use By

What each date label means, which foods are safe past best-before and which are not.

In some regions an advisory best-before date is used while a mandatory use-by or freshness date applies to perishable foods; the two are not interchangeable. Confusing them is the most common label-reading error in a home pantry, and the consequences run in both directions — wasting food that is still fine, or keeping food that is not.

Best-before is advisory and refers to quality. Dry staples — rice, pasta, canned goods — normally carry it, and they usually remain usable past the printed date as long as storage conditions held: dry, airtight, below 90 °F (32.2 °C) for cans, never frozen. According to the USDA, most canned foods remain safe indefinitely under those conditions; what declines after the date is texture, colour and nutrient content.

Use-by is mandatory and refers to safety. It appears on perishable foods such as fresh meat, dairy and ready meals. Past that date, discard regardless of appearance — the bacteria risk is not visible, and no storage trick extends it.

The practical rule: if the package says best-before, judge by storage condition and your own senses; if it says use-by, the date is a hard stop. For staples that carry neither — bulk rice, flour bought loose — rely on the shelf-life ranges in the staples table and on FIFO rotation to keep older stock moving first.

• Best-before: advisory, quality-focused, common on dry staples and canned goods.
• Use-by: mandatory, safety-focused, common on perishables — past it, discard.
• Neither label overrides bad storage: heat above 90 °F (32.2 °C) or freezing degrades canned goods regardless of dates.
• FIFO rotation keeps older stock in front so advisory dates are met before they lapse.

Further reading

• The Staples Table
• The Weekly Restock Routine