What is the minimum bottling proof required for bourbon?

The minimum bottling proof required for bourbon is 80 proof, which equates to 40% alcohol by volume. This standard is defined by the regulations governing the production of bourbon, which stipulate that for a spirit to be classified as bourbon, it must be distilled to no more than 160 proof (80% alcohol by volume) and entered into the barrel for aging at no more than 125 proof (62.5% alcohol by volume).

Bourbon must also be bottled at a minimum of 80 proof to maintain its classification. This ensures that the final product has enough alcohol content to deliver the characteristic flavors and aromas associated with bourbon, while also making it suitable for consumption. The regulation does not allow for lower proofs, ensuring that the integrity of the bourbon remains intact.