Champagne can last from a few days to many years, depending on whether it’s opened, its type (non‑vintage vs vintage), and how it’s stored. Unopened bottles kept cool, dark, and stable can stay drinkable for years, while opened champagne is usually best within a few days.

How Long Does Champagne Last?

Unopened Champagne

  • Non‑vintage (most common)
    • Typically best within about 3–5 years from purchase if stored properly (cool, dark, on its side, no big temperature swings).
* Often still safe after that, but flavor and bubbles may fade or taste “flat” or dull.
  • Vintage / prestige bottles
    • Can age 5–10 years or even up to 10–15 years for high‑quality prestige cuvées under ideal cellar conditions.
* Over time the style changes: fewer sharp bubbles, more honey, toast, and nutty notes, which some people **love** and others find “tired.”
  • Storage basics
    • Keep bottles:
      • In a cool place (around 7–12°C / mid‑40s to mid‑50s °F if possible).
  * Away from light and vibration, ideally on their side if long‑term cellaring.

* Heat, bright light, or years in the kitchen fridge door speed up aging and can give cooked, cardboard‑like flavors.

Opened Champagne

  • With a proper sparkling wine/champagne stopper
    • Best quality in the first 24–48 hours in the fridge.
* Often still enjoyable for about 3–5 days if tightly sealed and kept cold, though fizz and aroma gradually drop.
  • Without a stopper (just foil or a spoon myth)
    • Noticeable loss of bubbles within 12–24 hours; often tastes flat by the next day.
* The “spoon in the neck” trick is more myth than reliable method; a fitting stopper works much better.
  • Fridge vs counter
    • Always refrigerate opened champagne; warmth speeds oxidation and kills the sparkle.
* Store upright after opening to reduce surface area in contact with oxygen.

Quick Taste‑Check: Has It Gone Bad?

  • Signs of a past‑its‑prime or spoiled bottle
    • Very flat, no mousse or fizz when poured.
* Dull, oxidized aromas (wet cardboard, bruised apple, sherry‑like notes) when that’s not the style you expect.

* Brownish color in a wine that should look pale straw or light gold.
  • Still safe vs still good
    • An older or flat champagne is usually safe to drink but might not be very enjoyable if flavors are tired or oxidized.
* If it smells strongly unpleasant (vinegar, rot, heavy cork taint) or you see signs of leakage/pushed cork from heat, it’s better to skip it.

Simple Rules of Thumb

  • Unopened non‑vintage: aim to drink within 3–5 years if stored reasonably well.
  • Unopened vintage/prestige: can often age 5–10+ years, sometimes up to 15, if kept cool, dark, and stable.
  • Opened with stopper in fridge: best in 1–2 days, still okay up to about 3–5 days for many bottles.
  • Opened without stopper: expect big fizz loss within a day; chill and finish as soon as you reasonably can.

TL;DR: For everyday planning, assume unopened champagne is at its best within a few years, and once you pop the cork, treat it like a 2–3 day luxury, not a long‑term roommate in the fridge.

Information gathered from public forums or data available on the internet and portrayed here.