IdScanner/Guides/Legal drinking age
Legal drinking age in the US and Canada
One number covers the entire United States. Canada takes two. The complications are not in the drinking age itself — they are in everything else a venue sells.
United States: 21, everywhere
The minimum age to purchase or publicly possess alcohol is 21 in all fifty states, plus DC and the territories. This is not a federal law directly — alcohol is a state matter — but the National Minimum Drinking Age Act of 1984 ties federal highway funding to it, and every state complies.
Many states carve out narrow exceptions — drinking with a parent present at home, religious use, culinary training — but these are exceptions to possession and consumption laws, not permission for a licensed venue to serve. For a door, the number is 21.
Canada: 18 or 19, by province
Alcohol is provincial in Canada, so the age changes when you cross a provincial line.
| Age | Province or territory |
|---|---|
| 18 | Alberta, Manitoba, Quebec |
| 19 | British Columbia, Saskatchewan, Ontario, New Brunswick, Nova Scotia, Prince Edward Island, Newfoundland and Labrador, Yukon, Northwest Territories, Nunavut |
An Ontario venue near the Quebec border will regularly see 18-year-olds holding perfectly valid Quebec ID who are still a year short locally. The threshold that matters is the one where the venue is, not the one where the card was issued.
The other ages a venue has to know
Alcohol is often not the only carded product on the premises, and the numbers do not always match.
| Product | United States | Canada |
|---|---|---|
| Alcohol | 21 | 18 or 19 by province |
| Tobacco and vaping | 21 federally, since December 2019 | 18 or 19 by province, generally matching alcohol |
| Cannabis, where legal | 21 in every state that has legalised adult use | 19 in most provinces; 18 in Alberta, 21 in Quebec |
Quebec is the exception worth remembering: 18 for alcohol but 21 for cannabis — the only place in Canada where the cannabis age is higher than the drinking age. A dispensary and a bar on the same street card differently.
Which birthday actually counts
A guest is of age on their birthday, not the day after — someone turning 21 today can be served today. The arithmetic sounds trivial and is a common source of door errors at 1 a.m., especially in February and around leap days. It is exactly the kind of calculation worth handing to a scanner rather than doing in your head under a strobe.
Two adjacent mistakes are worth naming:
- Reading the expiry as the date of birth. Both are printed on the card, often in similar type, and on some layouts they sit close together.
- Missing an expired card entirely. An expired licence is not valid ID even when the holder is plainly of age — and it is the single most common thing a tired door misses, because the guest genuinely is old enough and nothing about them looks wrong.
Europe, briefly
European ages are lower and more varied, and often split by drink type. Germany is the clearest example: under the Jugendschutzgesetz, beer, wine and cider from 16; spirits from 18. That is why an age threshold of 16 exists at all in a door app — it is not a lower standard, it is a different jurisdiction's actual rule.
Setting the threshold in IdScanner
IdScanner supports 16, 18, 19 and 21, set once a shift from the scan screen or Settings. It defaults to 21 — the strictest — so a door that never opens the setting fails in the safe direction, turning away borderline guests rather than admitting them.
Not legal advice. This page is a working reference for door staff, not a statement of the law that applies to your venue. Ages change, provincial rules are amended, and your licence conditions may be stricter than the statutory minimum. Check with your licensing authority.