Montana law does not set a minimum age to get a hotel room, so how old you have to be to get a hotel room in Montana comes down to each property’s own policy. Most hotels require guests to be at least 18, and many require 21. The age limit is a business decision driven by contract law and credit card requirements, not a state rule.
Why Hotels Set Their Own Age Minimums
Montana defines a minor as anyone under 18.1Montana State Legislature. Montana Code 41-1-101 – Minors and Adults Defined Minors can enter contracts “in the same manner as any other person,” but they also keep the power to disaffirm those contracts afterward.2Montana State Legislature. Montana Code 41-1-302 – Contracts of Minors – Disaffirmance A 17-year-old could book a room, run up charges, and then void the agreement. Hotels avoid that risk by setting a minimum check-in age.
There’s an exception for necessaries, and lodging can qualify. But hotels rarely want to litigate whether a given stay was truly a necessary, so the exception does little to change check-in practice.
Montana’s innkeeper statute lets a hotel require any prospective guest to show the ability to pay, through either a cash deposit or an accepted credit card.3Montana State Legislature. Montana Code 70-6-512 – Innkeeper’s Responsibilities – Limits Since most minors don’t carry a credit card in their own name, that requirement alone blocks many younger guests even at properties that would otherwise accept them.
Why Some Hotels Require 21
Even though 18 is the legal age of adulthood in Montana, many hotels raise their minimum to 21. Properties with minibars or in-room alcohol face liability concerns if an underage guest has easy access to liquor, and some chains apply a blanket 21-and-over rule across all their locations rather than police which rooms stock alcohol.
Property damage and noise complaints also factor in. Groups of 18-to-20-year-olds traveling without older companions tend to generate more complaints and damage claims, and the higher age limit is a risk-management call.
Chain Policies Vary by Property
Major hotel chains leave the minimum check-in age to each individual property. Marriott states the minimum is “set by the Hotel” and varies by location.4Marriott Help Center. What is the Minimum Age Required to Check-In? Hilton directs guests to check the specific hotel’s policies before booking.5Hilton Help Center. Hilton Hotel Policies Wyndham, which operates Super 8 and Days Inn properties common across Montana, also varies by property.6Wyndham Hotels. Frequently Asked Questions
Two hotels on the same block in Bozeman or Billings can have different age requirements. Call the specific property or check its website before you book. Don’t assume one Marriott’s policy carries over to the next.
Booking a Room for Someone Under the Minimum Age
The simplest workaround is having an adult book and check into the room. The adult who registers becomes responsible for all charges, any property damage, and the conduct of everyone staying in the room. Most hotels require that adult to be physically present at check-in to sign the registration and provide a credit card for incidentals.
Some hotels allow an adult to authorize payment remotely through a third-party credit card authorization form. The form typically requires the cardholder’s name, billing address, a copy of their photo ID, and explicit authorization for specific charges such as room rate, taxes, and incidentals. Many forms let the cardholder set a spending cap. Hotels may accept the form by fax or through a secure upload portal.
Not every hotel accepts this arrangement. Some require the registered adult to physically stay in the room with any minor guests. Others allow the minor to stay alone after the adult checks in, but expect the adult to remain reachable and responsible throughout the stay. Ask about the specific policy when you call. Getting turned away at 10 p.m. with a teenager and no backup plan is worth avoiding.
Emancipated Minors
Montana allows a person who is at least 16 to petition a court for limited emancipation. The petition can be filed by the minor, a parent, or the Department of Public Health and Human Services. The minor must show they have or can reasonably obtain enough money to cover the financial obligations that come with emancipation, and that they understand and can responsibly exercise the rights involved.7Montana State Legislature. Montana Code 41-1-501 – Petition for Limited Emancipation
An emancipated minor whose court order grants the right to enter contracts could, in theory, check in independently. Front desk staff are unlikely to be familiar with emancipation orders, so bring a certified copy of the order along with standard identification and be ready to explain the situation to a manager.
What to Bring to Check-In
Every hotel will ask for government-issued photo identification. A Montana driver’s license, state ID card, or passport all work. The hotel uses it to verify your identity, confirm you match the reservation, and check your age. You’ll also need a credit or debit card for the room deposit and incidentals, and the name on the card should match the name on your ID. If someone else is paying, arrange the third-party authorization before you arrive rather than at the counter.