top of page

The Angel's Share: An Intricate Dance of Time and Spirits

whisky getting poured into a glass

Whisky, a beverage steeped in tradition and craftsmanship, undergoes a fascinating journey from distillation to maturation. One of the most intriguing aspects of this journey is the phenomenon known as the "Angel's Share." This term poetically describes the loss of whisky that occurs during the maturation process in oak casks. As whisky ages, a portion of it evaporates through the cask, believed to be a tribute to the angels who watch over it. This article delves into the science behind the Angel's Share and its unique implications, including the interesting connection to the U.K. capital gains tax.

Understanding the Angel's Share

The Angel's Share refers to the natural evaporation of whisky as it ages in oak casks. This process can result in the loss of up to 2-3% of the liquid each year, depending on factors such as the cask's environment, climate, and the quality of the wood.

Factors Influencing the Angel's Share:

  1. Climate: The temperature and humidity of the storage environment play a crucial role. In warmer climates, evaporation rates can be higher, while cooler climates may see slower rates.

  2. Cask Quality: The type of oak and the cask's previous use influence the evaporation rate. Fresh (virgin) oak casks, which are more porous, tend to allow more whisky to evaporate than older, reused casks.

  3. Storage Conditions: Airflow around the casks can also affect the rate of evaporation.

  4. Duration: The longer the whisky matures, the greater the cumulative loss to the Angel's Share. This is why older whiskies are often more expensive – not only because of their rarity but also due to the significant volume loss over time.

The Science Behind the Evaporation

The porous nature of oak barrels allows for a small amount of air to interact with the whisky, leading to evaporation. This interaction also facilitates a complex series of chemical reactions that develop the whisky's flavor profile. The evaporated components primarily consist of alcohol and water, with alcohol generally evaporating faster due to its lower boiling point. This gradual reduction in alcohol content is a crucial aspect of the maturation process, contributing to the smoothness and depth of the final product.

Whisky Casks as “Wasting Assets”

The concept of the Angel's Share has a unique financial implication in the U.K., particularly concerning capital gains tax. In U.K. tax law, whisky casks are classified as "wasting assets." This classification is due to the expected gradual reduction in the cask's contents – the whisky – over time because of evaporation.

Definition and Implications of Wasting Assets

A wasting asset is defined as an asset with a predictable life of 50 years or less. Given that whisky casks lose volume continuously due to the Angel's Share, they meet this criterion. Consequently, the sale of whisky casks is exempt from capital gains tax in the U.K.

This tax exemption provides a significant advantage for investors in whisky casks. Unlike other investments that may be subject to capital gains tax upon the sale, the returns from whisky cask investments can be fully realized without tax deductions on the capital gain. This exemption has contributed to the growing interest in whisky cask investments as collectors and investors seek to diversify their portfolios with tax-efficient assets.


The Angel's Share is more than just a romantic notion; it is a crucial element of whisky maturation that significantly impacts the final product's quality and value. Understanding this process sheds light on the artistry of whisky production and the unique financial benefits of investing in whisky casks. As the angels take their share, they leave behind a richer, more complex whisky that continues to captivate enthusiasts and investors alike.


Disclaimer: The information provided in this article is for informational purposes only and should not be construed as tax advice. We are not tax advisors, and the tax implications mentioned here may not apply to every individual's situation. We strongly recommend consulting with a qualified tax professional or financial advisor to understand the specific tax laws and implications related to whisky cask investments and other financial matters.


bottom of page