Yes, you can almost always check into a hotel after 4:00 PM; in fact, 4:00 PM is the standard "guaranteed" check-in time for many major hotel chains like Marriott, Hilton, and Disney Resorts. If you arrive after this time, your room should be clean and ready for immediate occupancy. However, if you plan to arrive very late at night (after 10:00 PM or midnight), it is essential to notify the hotel in advance. Most hotels perform a "night audit" where they process "no-shows" and may release your room if they think you aren't coming. In 2026, many travelers use the hotel’s mobile app to perform a "Digital Check-in," which allows them to bypass the front desk entirely and use their phone as a room key, making a late-night arrival seamless. If the hotel is overbooked, arriving late can sometimes put you at risk of being "walked" (moved to another hotel), so a quick phone call or an app message stating, "I will be arriving at 11:00 PM," ensures your reservation is held and your "late check-in" is handled smoothly.