In Colorado, you generally cannot drink at 18. State law sets 21 as the legal drinking age and treats possession or consumption by anyone younger as an offense, with one practical exception most families ask about: an underage person may drink on private property when the property owner consents and a parent or legal guardian is present and consenting. A few other narrow carve-outs exist for religious ceremonies, certain products, and culinary students, but there is no general right to drink at 18.
The Private Property Exception
Three things have to be true at the same time for the private-property exception to apply: the owner or legal possessor of the property knows about and consents to the underage drinking, a parent or legal guardian of the underage person is physically present, and that parent or guardian also consents.1Justia. Colorado Code 18-13-122 – Illegal Possession or Consumption of Ethyl Alcohol or Marijuana by an Underage Person A parent giving permission by phone while their child is at a friend’s house does not satisfy the statute. The parent has to be there.
“Private property” is also defined more narrowly than the everyday meaning. The statute covers homes and private land not open to the public, but it excludes any business that holds or needs a liquor license, any establishment that sells alcohol, and any place that rents rooms or provides accommodations to the public. A hotel room, a short-term rental, and a restaurant’s private dining room all fall outside the exception, even with a parent sitting at the table.1Justia. Colorado Code 18-13-122 – Illegal Possession or Consumption of Ethyl Alcohol or Marijuana by an Underage Person
Other Narrow Exceptions
A handful of other situations do not violate the underage possession law, but none of them functions as a general permission to drink.
- Religious purposes protected by the First Amendment, such as sacramental wine during communion.1Justia. Colorado Code 18-13-122 – Illegal Possession or Consumption of Ethyl Alcohol or Marijuana by an Underage Person
- Alcohol consumed only through medicinal or hygienic products such as cough syrup or mouthwash, confectionery containing small amounts of alcohol, and any beverage with less than half a percent alcohol by weight.1Justia. Colorado Code 18-13-122 – Illegal Possession or Consumption of Ethyl Alcohol or Marijuana by an Underage Person
- Tasting (not drinking) by students enrolled in a culinary arts, food service, or restaurant management program at an accredited post-secondary school, under the direct supervision of an instructor at least 21 years old who keeps control of the alcohol.1Justia. Colorado Code 18-13-122 – Illegal Possession or Consumption of Ethyl Alcohol or Marijuana by an Underage Person
These operate as affirmative defenses. If you are charged, you have to show the exception applies.
Penalties if You Are Caught
Underage possession or consumption is an unclassified petty offense in Colorado, so no jail time attaches to the charge itself. The penalties still escalate with each conviction.1Justia. Colorado Code 18-13-122 – Illegal Possession or Consumption of Ethyl Alcohol or Marijuana by an Underage Person
- First offense: a fine of up to $100, a substance abuse education program, or both. Your driver’s license can be revoked if you fail to complete any court-ordered assessment or program.
- Second offense: a fine of up to $100, mandatory substance abuse education, a possible assessment with treatment, up to 24 hours of community service, and a six-month license revocation.
- Third or subsequent offense: a fine of up to $250, mandatory assessment and any recommended treatment, up to 36 hours of community service, and a 12-month license revocation.
Every conviction adds a $25 surcharge that funds adolescent substance abuse prevention and treatment.1Justia. Colorado Code 18-13-122 – Illegal Possession or Consumption of Ethyl Alcohol or Marijuana by an Underage Person License revocations run through the Colorado Division of Motor Vehicles.2Colorado Department of Revenue. Alcohol and Drug Related Offenses For many teenagers, the loss of driving privileges hits harder than the fine.
A Much Stricter Rule Behind the Wheel
Colorado applies a far lower blood alcohol threshold to drivers under 21. The adult DUI limit is 0.08%, but a driver under 21 with a BAC between 0.02% and 0.05% commits a traffic infraction called Underage Drinking and Driving (UDD). A single drink can put someone over 0.02%.3Justia. Colorado Code 42-4-1301 – Driving Under the Influence, Driving While Impaired, and Habitual User
A first UDD offense is a class A traffic infraction, with up to 24 hours of community service and possible alcohol evaluation, education, or treatment at the driver’s expense. A second or later UDD becomes a class 2 traffic misdemeanor. Above 0.05%, the regular DUI and DWAI statutes apply with their full consequences.3Justia. Colorado Code 42-4-1301 – Driving Under the Influence, Driving While Impaired, and Habitual User
Calling for Help During an Overdose
Colorado’s Good Samaritan law grants immunity from arrest and prosecution for underage alcohol possession when someone reports an alcohol overdose emergency. The protection covers both the caller and the person overdosing, provided the report is made in good faith to 911, law enforcement, or a medical provider, the caller stays at the scene until help arrives, and the caller identifies themselves and cooperates with responders.4FindLaw. Colorado Code 18-1-711 – Immunity for Persons Who Suffer or Report an Emergency Drug or Alcohol Overdose Event It applies to the underage possession charge tied to the same incident and does not shield unrelated offenses.
What Happens to Adults Who Provide the Alcohol
Giving, selling, or serving alcohol to anyone under 21 is a class 2 misdemeanor in Colorado, punishable by up to 120 days in jail and a fine of up to $750.5Justia. Colorado Code 44-3-901 – Unlawful Acts – Exceptions – Definitions Knowingly furnishing alcohol to someone under 18 can also lead to charges for contributing to the delinquency of a minor. Licensed businesses face administrative penalties on top of criminal charges, including suspension or revocation of the liquor license.6Colorado State Board of Governors. Colorado Liquor Code – Article 3, Title 44
Adults who host house parties where minors drink also carry civil exposure. If an intoxicated minor leaves the party and causes a crash, the host can face a lawsuit for the resulting injuries and damages alongside the criminal charge for furnishing alcohol.
Working Around Alcohol at 18
An 18-year-old can legally sell, serve, and handle alcohol as an employee in most licensed establishments, generally as long as a supervisor who is at least 21 is on the premises. The rules vary by license type: taverns, lodging facilities, and entertainment venues that don’t regularly serve meals require employees to be at least 21, while retail liquor stores, liquor-licensed drugstores, and fermented malt beverage and wine retailers can hire 18-year-olds under different terms.7Legal Information Institute. 1 CCR 203-2, Regulation 47-913 – Age of Employees Handling alcohol at work at 18 creates no right to drink it.