How Long Do Eggs Last Past Their Best-Before Date? (UK Guide)

There’s a box of eggs in your fridge, the best-before date was four days ago, and you’re staring at them wondering if that omelette is a good idea. Here’s the reassuring truth: eggs usually last well past their best-before date — often 2-3 weeks beyond it if stored properly. But “usually” isn’t “always,” so let’s cover exactly how long eggs last, how to test them, and when to play it safe.

Best-before vs use-by: the crucial difference

In the UK, eggs carry a best-before date, not a use-by date. That distinction matters legally and practically:

• Use-by: about safety. Don’t eat after this date (think fresh meat, pre-packed salads).
• Best-before: about quality. The food is still safe after this date; it just might not be at its peak.

So eggs past their best-before aren’t automatically unsafe — they’re just past the manufacturer’s quality guarantee. The Food Standards Agency confirms this distinction, and it’s the single most useful thing to know about food dates in general.

How long do eggs last past their best-before date?

Stored in the fridge (which UK guidance recommends — keep them consistently cool, ideally in their box on a middle shelf, not the door), eggs are typically fine for 1-3 weeks past the best-before date. The Lion mark scheme, which covers the vast majority of UK eggs, means hens are vaccinated against salmonella, making the risk profile far lower than it was in the 1980s.

That said, freshness declines over time: the whites get thinner, the yolks flatten, and they won’t whip or poach as beautifully. A 3-week-old egg is fine for a cake or a hard-boil; save the freshest ones for poaching and frying where structure matters.

The float test: does it work?

Yes — it’s simple physics and genuinely useful. Fill a bowl or glass with cold water and lower the egg in:

• Sinks and lies flat: very fresh.
• Sinks but stands upright or tilts: a week or two old, perfectly fine to eat.
• Floats: a large air pocket has formed — the egg is old. Don’t automatically bin it, but crack it into a separate bowl and check carefully (see below). If it floats high, it’s past it.

The float test tells you about age, not safety directly — an old egg isn’t necessarily a bad egg. Always combine it with the sniff and sight check.

The crack-and-check method

Crack the egg into a small bowl or cup (never straight into your batter or pan — one bad egg ruins everything):

• Smell: a rotten egg smells unmistakably of sulphur. If it smells off, it is off. Bin it.
• Look: the white should be reasonably thick, the yolk rounded and intact. A very watery white and flat yolk means old but usually still edible if it smells fine.
• Shell: check for cracks before cracking — bacteria enter through cracks, so a cracked egg past its date is a bin job.

Your nose is remarkably reliable here. Humans are evolutionarily tuned to detect rotten eggs; trust it.

When to be cautious

• Pregnant, elderly, very young, or immunocompromised: stick closer to the dates and cook eggs thoroughly (both white and yolk solid). The NHS advises vulnerable groups to avoid raw or lightly cooked eggs unless they’re Lion-marked.
• Non-Lion eggs: without the vaccination scheme, the salmonella risk is higher — be more conservative.
• Eggs stored at room temperature: fine for a few days in a cool UK kitchen, but the fridge extends life significantly. Once refrigerated, keep them refrigerated — temperature swings cause condensation that draws bacteria through the shell.
• Any off smell or appearance: when in doubt, throw it out. Eggs are cheap; food poisoning isn’t.

Storage tips that actually extend life

• Keep eggs in their original box — it protects them, prevents odour absorption, and keeps the date visible.
• Store pointed-end down; it keeps the yolk centred and the air pocket at the top.
• Middle shelf, not the door — the door is the warmest, most temperature-variable spot.
• Don’t wash them — the shell has a natural protective coating (the “bloom”); washing removes it.

Good egg storage is part of the same mindset as knowing what to do with leftover roast chicken — using what you’ve got instead of wasting it. And if you’re watching energy costs in the kitchen generally, it’s worth checking how much it costs to run an air fryer per hour versus the oven for your egg-based breakfasts.

Egg freshness myths, debunked

“You can’t eat eggs after the date, full stop.” The most persistent myth, and the most wasteful. Best-before is a quality marker, not a safety cliff-edge. The Food Standards Agency is explicit: best-before dates are about quality, and food is usually safe after them. Use-by dates are the ones to respect absolutely. Mixing up the two costs UK households millions of edible eggs a year.

“The float test means a floating egg is rotten.” Not quite — it means the egg is old (a large air cell has formed). An old egg isn’t necessarily a bad egg. Always crack and check: a floating egg that smells fine and looks normal is usually perfectly edible, just better suited to hard-boiling (older eggs actually peel more easily) than poaching. The float test measures age; your nose measures safety.

“Brown eggs last longer than white eggs.” Shell colour reflects the hen’s breed, nothing more. Storage conditions determine lifespan, not pigment. Similarly, “free-range eggs spoil faster” is nonsense — the farming method doesn’t affect keeping time once the egg is laid and refrigerated.

“You should wash farm-shop eggs.” Don’t — the natural bloom coating protects against bacteria, and washing removes it. UK eggs aren’t washed commercially (unlike in the US, where washing is standard and refrigeration is then mandatory). If a farm egg is dirty, wipe it with a dry cloth. And “eggs must be stored in the fridge door’s egg rack” — the door is the warmest spot with the most temperature fluctuation. The middle shelf in the box is better in every way, rack or no rack.

The takeaway

Eggs are typically safe 1-3 weeks past their best-before date when refrigerated — best-before is about quality, not safety. Use the float test for age, the crack-and-sniff test for safety, and your judgement for everything in between. When in doubt, throw it out — but most of the time, that “expired” egg is perfectly good.