Quick answer
A use-by date concerns safety; a best-before date concerns quality. Do not supply a product after its use-by date simply because it looks or smells normal. Best-before food needs a suitable safety and quality assessment rather than automatic disposal or automatic acceptance. Both dates depend on proper storage, and opening instructions can create an earlier limit.
Read the type of date before making a decision
The same calendar date can lead to different decisions depending on its wording. Official date guidance distinguishes safety from quality. Business labelling guidance states that selling food past its use-by date is an offence.
A date also assumes the required storage conditions. An in-date pack can still be unsuitable if it was damaged or badly handled.
Compare the two date types
| Issue | Use-by | Best-before |
|---|---|---|
| Main purpose | Safety of a quickly perishable food. | Quality over the stated period. |
| After the date | Do not supply the unchanged product. | Assess suitability; it is not automatically unsafe or automatically acceptable. |
| Smell or appearance | Cannot override the safety date. | May inform quality assessment but does not repair poor handling. |
| Instructions | Storage and opening conditions still apply. | Storage, condition and relevant instructions still apply. |
Opening and handling can shorten the usable period
Read instructions such as refrigeration after opening or use within a stated period. Do not assume a far-off unopened date remains the only limit once a pack is opened.
When transferring food, retain its identity, ingredients, original date and relevant opening information. The official stock-control method explains why that information must not disappear into an anonymous working tub.
A safe processing step is different from changing a label
Freezing or cooking before the use-by date can form part of a suitable safe process, with the necessary new instructions and identification. This does not permit freezing already expired food to rescue it.
FSA redistribution guidance explains this distinction. For a business, establish the safe process and shelf life rather than borrowing a household leftovers number as validation. Ask the relevant food-safety or trading-standards team about uncertain products.
Worked example: the later date is not the controlling one
Hypothetical example: a café opens a product with a future use-by date. Its instructions require use within a shorter period after opening. An employee looks only at the printed date.
The supervisor checks both conditions and uses the earlier applicable limit. The opening label preserves the actual history. Replacing the label or moving the contents does not start that period again.
Assess quality sensibly and isolate uncertain stock
For past-best-before food, consider the actual product, storage, packaging integrity and quality; use suitable guidance for the activity. Do not generalise from an intact dry product to every chilled or damaged food.
Remove passed-use-by stock from use and service, then record disposal and fix the ordering or rotation failure. Keep an uncertain product identified while the responsible person checks it; do not return it casually to available stock.
Next steps
Train staff to read date wording and opening instructions together. Connect the checks with storage controls and honest corrective-action records.
Check official date guidance — Read the date with the storage and opening conditions.