The minimum age to check into a hotel varies by location and individual hotel policy, but it is typically 18 or 21 years old. In most cities, 18 is the legal minimum to sign a binding contract, which a hotel stay represents. However, many hotels, particularly in major "party" destinations like Las Vegas, Miami, or Spring Break hubs, set their own internal requirement at 21. This is often due to liability concerns regarding the minibar or the hotel's insurance policy which may require a higher age for all guests in a room. In 2026, some boutique or "lifestyle" hotels have even raised this to 25 to maintain a specific atmosphere. If you are under 21, it is essential to check the "Policies" section on the hotel's website or call the front desk before booking. Some hotels will allow 18-year-olds if they have a military ID or a notarized letter from a parent, but without meeting the age requirement, the hotel can legally refuse to honor your reservation, even if it has already been paid for in full.