Safe Food Storage and Stock Rotation in Catering: FIFO, the Cold Chain and Dates

Storage is where food safety is quietly won or lost. A delivery stored at the wrong temperature, raw meat dripping onto a salad, or an out-of-date ingredient reaching a plate — each is a preventable failure that begins in the fridge, freezer or store room. Understanding safe storage is one of the most valuable skills a catering worker can have.

Temperature control and the cold chain

Harmful bacteria multiply fastest between 5 °C and 63 °C — the “danger zone”. Safe storage is largely about keeping food out of it. In Ireland, chilled food should be kept at 5 °C or below and frozen food at −18 °C or below. The cold chain is the unbroken run of chilled temperatures from supplier to storage to service; every gap in it gives bacteria a chance to grow.

In practice this means checking the temperature of chilled and frozen deliveries on arrival, refusing anything outside safe limits, and moving accepted food into storage quickly rather than leaving it on a warm loading area. Fridge and freezer temperatures should be checked and recorded regularly.

Separate raw and ready-to-eat

Cross-contamination in storage is a major cause of food poisoning. Raw meat, poultry and fish carry bacteria that are destroyed by cooking — but ready-to-eat food will not be cooked again, so any bacteria transferred to it goes straight to the customer. To prevent this:

• Store raw food below ready-to-eat food so nothing can drip down onto it
• Use separate fridges where possible, or clearly designated shelves
• Keep raw and ready-to-eat food covered and in suitable containers
• Never store food on the floor

Stock rotation: FIFO

Good storage is useless if old stock is forgotten at the back of the shelf. FIFO — First In, First Out — is the simple discipline of using older stock before newer stock. When a delivery arrives, new items go behind existing ones, so the oldest is always reached first. FIFO reduces waste and, more importantly, means food is used well within date.

FIFO is boring, and that is exactly why it works. A minute spent rotating a delivery today prevents a customer being served something three days out of date next week.

Use-by versus best-before

The two date marks mean very different things, and confusing them is dangerous:

• Use-by is a safety date, used on perishable foods such as meat, fish and dairy. Food must not be used or sold after its use-by date, even if it looks and smells fine — the risk is invisible.
• Best-before is a quality date, used on longer-life foods. After it, the food may be past its best but is not necessarily unsafe.

Catering staff should treat use-by dates as absolute, and manage them with FIFO and clear labelling — including labelling and dating food that has been decanted, prepared or opened.

Dry and ambient storage

Not all storage is chilled. Dry stores should be cool, dry, well-ventilated and pest-proof, with food kept off the floor and containers sealed once opened. Cleaning chemicals must always be stored separately from food to prevent chemical contamination.

Safe storage is unglamorous, routine work — and it prevents more harm than almost anything else in the kitchen.