What makes a whisky Scotch

Scotch is defined by law

The current rules are set out in the Scotch Whisky Regulations 2009. The name Scotch whisky is also protected as a geographical indication in many export markets, including India. In plain terms, a whisky cannot be called Scotch unless every stage from mashing to maturation happens in Scotland and meets the standards below.

This makes Scotch different from the word whisky on its own. In India, for example, much of what is sold as whisky is made from molasses spirit, a practice our guide to molasses and grain spirit in India explains. That spirit could never be Scotch.

Made from cereals, water and yeast

Scotch must be made from water and malted barley, to which whole grains of other cereals may be added. The enzymes that turn starch into sugar must come from the malt itself, not from added commercial enzymes. Only yeast may be used to ferment the wash.

Nothing else goes in. There are no flavourings and no sweeteners. The only permitted additions to the finished whisky are water and plain caramel colouring, known as E150a, used to keep colour consistent between batches. Our guide to chill filtration and caramel colouring covers that debate.

Distilled below 94.8% and matured three years

The spirit must be distilled to an alcoholic strength below 94.8% ABV, so it keeps the aroma and taste of the raw materials. Neutral spirit, which is distilled close to 96% ABV, is not allowed.

It must then mature in Scotland in oak casks of no more than 700 litres for at least three years. A spirit aged two years and eleven months is not yet Scotch whisky. It must be bottled at a minimum of 40% ABV. Every age statement on the label refers to the youngest whisky in the bottle, never the average.

The five categories on the label

The regulations define five categories. Every bottle must state which it is:

• Single malt Scotch: made only from malted barley, distilled in pot stills at a single distillery.
• Single grain Scotch: made at a single distillery from malted barley with other whole cereals, often wheat or maize, usually in column stills.
• Blended malt Scotch: a blend of single malts from more than one distillery.
• Blended grain Scotch: a blend of single grains from more than one distillery.
• Blended Scotch: a blend of one or more single malts with one or more single grains.

Single means one distillery, not one cask. A single malt can contain spirit from hundreds of casks, as long as they were all made at the same place.

Regions are protected too

The regulations also protect five regional names: Highland, Lowland, Speyside, Campbeltown and Islay. A whisky can only carry one of those names if it was distilled in that region. Our guides to Lowland whisky and Campbeltown whisky cover two of them.

Single malt Scotch must also be bottled in Scotland. Blends may be shipped in bulk and bottled abroad, which is why you may see Scotch blended or bottled in India for the local market. The whisky inside still has to be fully made and matured in Scotland.

How Scotch compares with other whiskies

Setting the Scotch rules beside other countries' rules is the quickest way to see what each one protects:

• Bourbon must be made in the United States from at least 51% corn, distilled to no more than 80% ABV and filled at no more than 62.5% ABV into new charred oak containers. There is no minimum age for plain bourbon.
• Irish whiskey must mature at least three years on the island of Ireland, in wooden casks rather than oak specifically.
• Canadian whisky must mature at least three years in small wood in Canada.

Scotch is unusual in insisting on oak, on a 700 litre cask limit and on the enzymes coming from the malt alone. Bourbon is unusual in insisting on new casks every time. Those used bourbon barrels are exactly what most Scotch distilleries buy, which is why vanilla and coconut turn up in so much Scotch. Our guide to the rules that define Irish whiskey covers Ireland in full.

What the rules do not tell you

The law sets a floor, not a flavour. It says nothing about peat level, cask type beyond oak, still shape or fermentation length. Two single malts that meet every rule can taste nothing alike.

That is where tasting comes in. A legal definition tells you how a whisky was made. Your nose and palate tell you what those choices produced. The second skill takes practice. It carries straight across to beer and other spirits.

Read one label line by line

Your first step: take any bottle of Scotch and find four things on the label. The category, the region if one is named, the age statement if there is one and the ABV. Then check each against the rules above. You will read every Scotch label differently after that.

Common questions

How long must Scotch whisky be aged?

At least three years in oak casks of no more than 700 litres, in Scotland.

What is the minimum ABV for Scotch?

Scotch must be bottled at a minimum of 40% ABV.

Can Scotch have added colour?

Yes, but only plain caramel colouring (E150a). No other flavourings or additives are allowed, apart from water.

Can Scotch be bottled in India?

Blended Scotch can be shipped in bulk and bottled outside Scotland. Single malt Scotch must be bottled in Scotland.