The Angel’s Share of Whisky

This is a term referenced by whisky makers and collectors alike but what exactly is the Angel’s Share, and why does it matter? 

         When making whisky, some of the liquid mysteriously disappears during maturation and it isn’t because someone is siphoning off the cask while they wait for it to mature. More boringly, it simply evaporates. This is more affectionately known as “the Angel’s Share”.¹ As the cask “breathes”, tiny amounts of alcohol and water leave, and oxygen interacts with the spirit. It’s an unavoidable tax the angels take in return for a well-matured whisky (and other such spirits).³

In Scotland the cask loss is estimated to be 1–2% of the cask volume per year.¹ This means the older the whisky, the more tends to be lost- one reason (amongst others) why older whiskies can be more expensive, as the yield is lower.

Interestingly, climate matters a lot for the Angel’s Share: Scotland’s cool, damp conditions tend to mean less volume is lost than in hotter climates. Alcohol and water evaporate through the cask at different rates depending on humidity, so the whisky’s ABV can change over time.³ In Scotland, ABV often tends to decrease as whisky ages; in warmer and drier climates, water loss can be greater, which can cause ABV to rise.

Here are a few Angel’s Share rates I found (courtesy of Milroy’s of Soho):³

·       In Scotland: average loss of ~2% per year due to cool, damp conditions.

·       In Kentucky: higher losses (up to ~5% per year) due to hot summers.

·       In Taiwan: even higher losses (8–12% per year) at Kavalan due to tropical heat.

Whilst, on the surface, this may seem like an annoying loss-affecting the margins of whisky-making—it’s also part of what develops flavour: depth, complexity, and character. It can even affect maturation rates, and it’s part of what makes whisky special (and some older bottles rarer than others).³ 

Sources:

1. What is the Angel’s share of whisky? The Glenlivet (UK). Available at: https://www.theglenlivet.com/en-gb/our-community/articles/angels-share-meaning/ (Accessed: 13 April 2026).

2. Scotland.org. “Whisky.” Scotland.org. Available at: https://www.scotland.org/about-scotland/food-and-drink/whisky (Accessed: 13 April 2026).

3. Dunn, J. (2025) What is the angel’s share? The whisky lost to maturation, Milroy’s of Soho. Available at: https://milroysofsoho.com/blogs/core-whisky-definitions/what-is-the-angel-s-share-the-whisky-lost-to-maturation?srsltid=AfmBOopZGWIJ-rCgxpFn59Za_HDEpT9u706vBxtyA1kS6nlQFxj9bzGA (Accessed: 13 April 2026).