How To Tell Whether Food Is Past Its Expiration Date

A date printed on food packaging is useful, but it does not always give a complete answer about whether something is safe to eat. Storage temperature, packaging condition, handling, and the type of food can matter just as much as the calendar.

In Australia, shoppers commonly see “use-by” and “best-before” dates in supermarkets such as Coles and Woolworths. Understanding the difference between these labels, then checking the food itself carefully, can help reduce waste without taking unnecessary risks.

Read The Date Label Correctly

A use-by date is mainly about food safety. It is commonly found on foods that can support harmful bacteria, including fresh meat, poultry, seafood, prepared salads, dairy products, and chilled ready-to-eat meals. Once this date has passed, the safest choice is to discard the food, even if it looks and smells normal.

A best-before date generally refers to quality rather than immediate safety. Food may still be suitable after that date if it has been stored correctly and the packaging is intact. Taste, texture, freshness, and nutritional quality may decline, but the product is not automatically dangerous. This is especially common with dry pasta, rice, canned goods, biscuits, and some sauces.

Australian date labels follow food standards overseen by Food Standards Australia New Zealand. A product marked “packed on” or “baked on” may require you to judge its age using the storage instructions and the condition of the food. A “sell-by” date can help retailers manage stock, but it is not the same as a use-by warning for consumers.

Check Storage Before Relying On Your Senses

A date only makes sense when the food has been stored as directed. Chilled products should usually remain at 5°C or colder, while frozen food should stay solidly frozen. If a carton of milk has sat in a warm car during a Brisbane summer afternoon, its safety may have deteriorated well before the printed date.

Look for a broken seal, swollen can, leaking container, damaged vacuum pack, or unusual pressure when opening a jar. These signs can indicate spoilage or bacterial activity. Cans with severe dents around the seam, rust that has penetrated the surface, or bulging lids should be thrown away rather than tested.

The Australian “two-hour/four-hour rule” is useful for perishable food held between 5°C and 60°C. After less than two hours, food can generally be refrigerated; between two and four hours, it should be used immediately; after more than four hours, it should be discarded. Count the total time out of refrigeration, including preparation, transport, and serving.

Use Sight, Smell, And Texture Carefully

Visible mould is a clear warning, especially on soft foods. Mould can spread below the surface of bread, berries, soft cheese, cooked rice, jam, and leftovers, so cutting away the visible patch is not always enough. Discard the whole item when mould appears on a soft or moist food.

A sour, rotten, fermented, chemical, or otherwise unfamiliar smell can signal spoilage. Slime on meat, fish, poultry, or vegetables is another strong warning. Changes such as curdling, excessive bubbling, discolouration, or a swollen package should also be treated seriously.

However, the senses have limits. Salmonella, Listeria, and other harmful organisms may be present without changing the smell, taste, or appearance of food. Never taste a questionable product to decide whether it is safe. When a high-risk food is past its use-by date or has been stored incorrectly, discard it.

Food type	Common warning signs	Safer response
Fresh meat or poultry	Sticky surface, sour odour, grey-green patches	Discard if spoiled or past its use-by date
Fish and seafood	Strong ammonia smell, dull flesh, slimy texture	Discard when freshness is uncertain
Milk and yoghurt	Sour smell, lumps, bloated container	Follow the use-by date and discard if questionable
Bread and soft fruit	Mould, damp patches, unusual odour	Discard the entire soft item with mould
Canned food	Bulging, leaking, severe rust, spurting contents	Do not open or taste; discard safely
Dry goods	Insects, webbing, moisture, stale or rancid smell	Dispose of contaminated food and inspect nearby items

Treat Different Food Categories Differently

Leftovers need extra care because cooking does not protect food forever. Cool cooked food promptly, place it in shallow containers, and refrigerate it within two hours. Many households use leftovers within three to four days, but this depends on ingredients, cooling speed, and refrigerator temperature. Reheat until steaming hot throughout, and avoid repeatedly cooling and reheating the same meal.

Rice, pasta, stuffing, and potatoes deserve particular attention because bacteria can multiply if they are left warm for too long. Seafood, deli meats, soft cheeses, and prepared salads are also more perishable than dry pantry items. In a busy Melbourne household, a takeaway meal left on the bench through the evening is not made safe simply because it smells fine the next morning.

Frozen food can remain safe for a long time when it stays continuously frozen, although its quality may suffer from freezer burn or repeated temperature changes. If food has thawed completely, check how long it was warm and whether it still contains ice crystals. When in doubt, do not refreeze raw or cooked food without first confirming that it has stayed safely cold.

For broader everyday guidance on storage, shopping, and household decisions, readers can explore practical food guidance alongside official Australian food-safety advice.

Build Safer Shopping And Kitchen Habits

Good food safety often begins before the groceries reach the fridge. Pick up chilled and frozen items near the end of the shop, use an insulated bag for the trip home, and avoid leaving perishables in a parked car. This matters especially during hot weather in Perth, Darwin, or regional parts of New South Wales.

Keep older products at the front of the cupboard or refrigerator so they are used first. Mark the date when leftovers were cooked, divide large packs into smaller portions, and freeze food before its use-by date rather than waiting until the final day. Keep raw meat below ready-to-eat food in the fridge so drips cannot contaminate other ingredients.

Use these practical checks when deciding what to keep:

• Read whether the package says “use-by” or “best-before” before inspecting the food.
• Confirm that chilled, frozen, and opened products were stored at the recommended temperature.
• Reject swollen, leaking, mouldy, slimy, or unusually odorous food.
• Apply the two-hour/four-hour rule to leftovers, catering, picnics, and takeaway meals.
• Be especially cautious with food served to pregnant people, young children, older adults, or anyone with reduced immunity.
• When safety depends on guessing, throw the food away rather than tasting it.

A food past its best-before date may still be perfectly usable, while food within its date can be unsafe if it has been mishandled. Combining the label, storage history, packaging condition, and sensible visual checks gives you a much more reliable decision than relying on one clue alone.

Make date checking part of the normal kitchen routine: inspect chilled food when unpacking groceries, label leftovers, keep the fridge cold, and act quickly when something seems wrong. These small habits protect your household, limit avoidable food waste, and make everyday choices at home much easier.