Before your products reach the counter, you need evidence to support their use-by date. That evidence must reflect your ingredients, production process, and storage conditions. You cannot assume that a date used for a similar product will suit yours.
This guide explains what information to gather, how to assess your process and when to seek specialist advice.
What Does a Use-by Date Tell the Customer?
Best-before and use-by dates serve different purposes:
- Best before concerns quality. After this date, a product may lose some of its expected flavour or texture.
- Use-by concerns safety. Food should not be eaten after this date, even if it looks and smells normal.
Shelf life is the period for which a product remains safe and/or maintains its intended quality under specified storage conditions.
A use-by date applies to the food under its stated storage conditions. Food can become unsafe before that date if it is stored incorrectly, and appearance or smell cannot confirm that it is safe. Simply repacking the food does not extend its life.
Food sold prepacked generally needs a best-before or use-by date. Loose food and PPDS food follow different labelling rules, but the business still needs to control how long these products can safely be kept and sold.
Description of the Product
Before considering a shelf-life claim, create a simple, documented product specification for the item. You should include:
- The complete recipe, including meat, seasonings, water, marinades, fillings, and casings.
- Your ingredient suppliers and their storage/handling instructions.
- The age and condition of the ingredients, their supplier’s date mark, and any instructions for use after opening or thawing.
- Whether the finished food is raw, ready to cook, or ready to eat.
- The product size, the exact packaging format, and the intended storage conditions.
Any proposed finished-product life must account for the history of the raw ingredients. For example, adding lemon juice or vinegar to a marinade does not establish a longer shelf life. If acidity is being relied upon as a safety control, the finished product and the effectiveness of that specific control need to be formally assessed.
The Whole Production Process
To establish a safe date, your assessment must cover much more than just the finished pack. Consider what happens to a batch of sausages from delivery onwards:
Receive ingredients → refrigerate → mince → mix → fill → pack → store/display → deliver or sell
Record the time and temperature at every relevant stage. Consider the delays between preparation and packing, temporary holding periods during a busy production shift, and your cleaning and handling arrangements. If you are making cooked items, document the cooking and rapid cooling stages.
Meat waiting to be minced, sausage mix awaiting filling, and finished packs waiting for refrigeration are all part of the process. Your storage assumptions should be realistic based on the likely distribution and customer handling, rather than relying on the ideal, controlled fridge environment in your shop.
Why Different Butcher’s Products Need Different Assessments
There is no single method for establishing shelf life because different products present entirely different risks.
| Product | Questions to explore |
|---|---|
| Fresh pork sausages | What is the meat’s history? How consistent are the recipe, prep times, and storage conditions? How are they packed? |
| Marinated chicken | What does the marinade contain? Is it being used purely for flavour, or as a validated preservation control? How is it stored? |
| Stuffed chicken or rolled joints | Does the filling introduce additional hazards or handling steps? Does product size affect the required cooking instructions? |
| Cooked meat sold ready to eat | How is cooking and rapid cooling controlled? Could slicing or packing introduce contamination after cooking? |
The assessment also depends on how the customer will use the product. Raw meats may need cooking instructions. Sliced cooked ham may be eaten straight from the pack, so its assessment must account for contamination during slicing and packing, without relying on further cooking by the customer.
What Packaging Changes and What It Cannot Establish
Packaging affects the conditions in which microorganisms can grow. Vacuum packing can slow the growth of some spoilage organisms, but it does not sterilise food or establish a safe shelf life.
For chilled vacuum-packed and modified-atmosphere-packed foods, a shelf life longer than ten days requires additional controls against Clostridium botulinum, which can grow without oxygen. Ten days is not a guaranteed safe life, and other hazards must still be assessed.
The guidance excludes chilled fresh beef, lamb and pork without added ingredients or processing beyond cutting, packing, chilling, freezing or quick-freezing. It still applies to minced, cooked or seasoned versions, including sausages and marinated meats, and poultry.
What Evidence is Needed?
In food safety, you will frequently encounter two terms:
- Validation: Gathering evidence that supports the proposed shelf life before using it.
- Verification: Checking that the established shelf life and production controls remain appropriate.
Relevant official guidance, supplier information, and existing historical evidence may contribute to your validation, but you must demonstrate their applicability to your actual product. Where evidence is insufficient, specialist assessment and testing may be needed, which could include:
- Durability studies: Examine how the product changes during storage, including relevant microbiological results.
- Predictive modelling: Estimates microbial behaviour using models with defined assumptions and limitations.
- Challenge testing: Specialist laboratory studies that assess the behaviour of deliberately introduced microorganisms under controlled conditions.
A satisfactory result from one sample does not establish a shelf life. The evidence needs to account for variation between batches and the conditions in which the food will be stored.
If you do not have enough evidence to support a proposed date, speak to your local authority food safety team. Seek advice before extending shelf life or making changes that could affect safety. Perishable and ready-to-eat products are particularly likely to need testing.
Clear Dates and Instructions
Once you have validated a shelf life, your business needs a consistent, documented method for applying it to each batch.
Write down when the shelf-life period starts and how staff should calculate the date for each batch. The assessment must account for ingredient history and any time between preparation and packing.
Where after-opening instructions are needed, make clear that the product must be used within that period or by its use-by date, whichever comes first.
Review Changes
Keep a written record of how you established the shelf life, together with the evidence supporting it. Keep files covering:
- Recipe and supplier specifications.
- Production, packaging, and storage conditions.
- Supporting technical advice and laboratory test results.
- The agreed shelf life and your date-calculation procedure.
- Routine checks and subsequent reviews.
If you change your recipe, supplier, production machine, pack format, or distribution arrangement, check whether the evidence behind your date still fits. A shelf-life assessment is only useful while it accurately represents the food you are actually selling.
