Does Champagne Go Bad? Shelf Life, Signs It Has Expired and How to Store It

Short answer: Yes, Champagne does go bad — but the timeline depends entirely on whether the bottle has been opened and what type it is. Opened Champagne lasts 1–3 days. Unopened non-vintage Champagne is good for 3–5 years, while vintage Champagne can age for 10–20 years or more under proper conditions.

There is something uniquely frustrating about a bottle of Champagne that has lost its sparkle. It went in fizzing and celebratory; it came out flat and slightly sour. Whether you left a half-finished bottle on the counter overnight or found one at the back of a cupboard from two birthdays ago, the question is the same: is it still good? This guide gives you precise, type-specific shelf-life data, the four key signs of spoilage, and a complete storage checklist.

Does Champagne Actually Expire?

Unlike milk or bread, Champagne does not develop bacteria that cause food poisoning. ‘Expired’ Champagne will not make you ill in any meaningful sense. What it will do is lose the qualities that make it worth drinking: the fizz, the bright acidity, the delicate fruit aromas. The technical term is oxidation — the process by which oxygen reacts with the wine's compounds, breaking down its structure and flavour. For sparkling wines, the first casualty is carbonation. Once CO₂ escapes, it is gone permanently.

Champagne Shelf Life: Opened vs. Unopened

Once opened, oxygen begins softening the mousse and aromatics immediately. Reseal with a proper sparkling wine stopper (not just the cork pushed back in) and refrigerate — without a stopper, expect noticeable fizz loss within a single day.

4 Signs Your Champagne Has Gone Bad

• No bubbles or very weak fizz. The most obvious sign — Champagne without carbonation has lost its defining characteristic.
• A vinegary or sulfurous smell. A sharp, acetic (vinegar-like) or sulfury (rotten egg) odor signals oxidation has taken hold.
• A dull, flat, or overly sour taste. Fresh Champagne has bright acidity and fruit; oxidized Champagne tastes stale and one-dimensional.
• Colour changes or cork issues. Before opening an older bottle, check for leaks, seepage, a pushed or sunken cork, or unusual colour — any of these can signal poor storage.

How to Store Champagne Correctly

Correct storage means a consistent temperature of 50–55°F (10–13°C), stored horizontally if ageing long-term, in darkness, and away from vibration. Any deviation from these conditions significantly shortens the shelf-life windows above. Avoid storing Champagne in a standard kitchen fridge for weeks at a time — it's too dry and can dry out the cork over extended periods, though brief fridge chilling before serving is fine.

Frequently Asked Questions

Can drinking old Champagne make you sick?

No. Oxidized or flat Champagne is unpleasant but not harmful — there's no food-safety risk from drinking it, only a quality one.

Does vintage Champagne last longer than non-vintage?

Yes, significantly. Vintage Champagne, made entirely from a single exceptional harvest, is built for longer ageing — often 10–20 years or more — while non-vintage is designed for earlier drinking, typically 3–5 years.

What should I do with Champagne that has gone flat?

Flat Champagne is still safe to drink and works well in cooking — champagne vinaigrettes, sauces, or a Champagne-based cocktail with added sparkling water can rescue a bottle that has lost its fizz.

For more on the ageing dynamics that apply across all wine styles, see our guide to whether wine expires. And if you're building a Champagne collection worth preserving for decades, Vinovest handles authenticated, temperature-controlled storage for investment-grade bottles from Dom Pérignon, Krug, and other prestige houses.