On a bottle of cognac, the designations VS, VSOP or XO offer an initial clue to its ageing. Behind them is a regulated system for classifying eaux-de-vie by age: the comptes.
This is not simply a matter of counting calendar years. It is an official system tied to the production calendar and the time the spirit spends in cask.
A shared calendar for measuring age
Cognac is made by distilling wine and then maturing the spirit in oak vessels. The age count begins on 1 April following the harvest and distillation season. This common reference date allows producers to classify their stocks according to the same criteria.
Before reaching its first compte, the spirit is considered to be at an early stage of its journey. From then on, each reference-date anniversary advances its classification. Compte 2 is the minimum age at which an eau-de-vie may be sold as cognac.
The number therefore does not necessarily correspond to the years elapsed since the exact date of distillation; it follows the official counting rules.
What VS, VSOP and XO indicate
The standard label designations relate to the minimum age of the eaux-de-vie in the blend:
- VS: the youngest component must be at least compte 2.
- VSOP: the required minimum age is compte 4.
- XO: since 2018, the minimum has been compte 10.
These designations do not necessarily describe the age of every eau-de-vie in the bottle.
A blend may bring together eaux-de-vie of different ages, but its classification is determined by the youngest component. Older eaux-de-vie can add nuance and complexity, but they do not raise the classification if a younger spirit remains in the blend.
Age as a blending tool
For the cellar master, the comptes are a working reference, not a recipe for flavour. They help organise reserves and combine eaux-de-vie that have developed in different ways.
In general, a younger eau-de-vie may retain greater vibrancy, while extended ageing tends to create a more integrated texture and aromas developed through contact with wood. The result also depends on the grape-growing area, distillation, cask and cellar conditions.
Oak plays an active role in this evolution: it contributes aromatic compounds and allows gradual interaction with air. Choosing the casks and deciding when to move a spirit between vessels are part of each house’s approach. That is why two cognacs with the same age designation can have different profiles.
A legal reference, not a tasting note
The Bureau National Interprofessionnel du Cognac (BNIC) is involved in organising and overseeing the sector, where age classification helps ensure that these designations are used correctly.
For consumers, understanding the comptes makes it easier to read a label accurately: they indicate a regulated minimum threshold, but do not, on their own, sum up a cognac’s style, perceived quality or complexity.
Ultimately, this system turns the passage of time into a shared reference for producers and consumers. Age matters, but it takes on meaning alongside the blending and ageing decisions that define each house’s identity.