There is a bottle at the back of a closet with a ten year old vintage on it. The question worth asking is not really its age. It is whether the wine was ever going to improve, and whether where it has been since ruined the chance.
Old and aging are not the same thing
Wine develops in bottle through slow interaction between a small amount of oxygen and the tannins, acids, sugar and alcohol in the wine, and the amount and quality of those components decides how far it can go, as Decanter sets out. A wine without that structure does not mature quietly in the dark. It fades.
Most wine on sale is made to be enjoyable on release. That is not a criticism, it is the design. Holding it for a decade does not turn it into something else, it just makes it tired.
Rough shelf lives, and why they are rough
Treat these as starting estimates for a bottle stored properly, not as promises about a specific wine.
Everyday white and rose: 1 to 2 years from release Everyday red: 2 to 3 years from release Non-vintage sparkling: 1 to 3 years Structured red built for aging: 5 to 20 years or more Fine wine from a good vintage: decades Fortified wine, sealed: very long, often decades
Price is a weak signal here and grape variety a better one, but the strongest signal of all is what the producer or merchant said the wine was for. If nobody suggested keeping it, nobody expected you to.
Storage decides more than the calendar
Two identical bottles, one in a cool closet and one on top of a fridge, are not the same wine after three years. Heat accelerates everything and swings between hot and cold do more damage than a steady warm room. The storage comparison guide covers finding the steadiest place you have, and the closure guide covers whether the bottle should be lying down while it waits.
This is also why an unknown bottle is a gamble in a way a bottle from your own rack is not. You know your own storage. You do not know the shelf it sat on in a shop with a window.
Is it still safe to drink?
Age alone is a quality problem rather than a safety one. An old bottle can be flat, sherry-like, vinegary or simply dull, and the fault guide covers telling those apart from cork taint and heat damage. Use ordinary judgment as you would with anything else you consume: if a bottle has leaked, if there is mold under the capsule, or if it smells actively wrong, pour it away rather than pushing through.
The visible clues are worth a look before you open anything old. A low fill level for the age of the bottle, a pushed cork or dried wine around the capsule all suggest the bottle has had a harder life than the date implies.
The only reliable test is opening one
If you have several bottles of the same wine, open one and write down what you found. That single note is worth more than any chart, because it is about your bottle, stored in your house, on this date.
Wine and vintage: Style: Bought on: Stored where since: My drink-by estimate: Based on: label / merchant / my last bottle: Bottle opened on, and what it was like:
Record the answer against the wine so the next bottle inherits it. The drinking window guide covers keeping an estimate visible as an estimate rather than letting it harden into a deadline.