Whether you can cancel a hotel within 24 hours of booking for a full refund depends heavily on local laws and the specific booking platform. In California, for example, a state law that took effect in July 2024 requires hotels to offer a free 24-hour cancellation window for any reservation made at least 72 hours before the stay. However, in most other regions, the policy is dictated solely by the hotel's terms. Many "Non-Refundable" or "Prepaid" rates do not allow for any cancellation without forfeiting the entire amount, regardless of how quickly you change your mind. If you book through a third-party site like Expedia or Booking.com, you must adhere to their specific interface rules. The "24-hour grace period" that is federally mandated for airlines in the U.S. does not currently exist as a national mandate for hotels, so it is vital to read the fine print—or book a "Flexible Rate"—if you think your plans might change within a day of booking.