In the travel industry, incidentals refer to secondary expenses that are not included in the primary cost of your room, flight, or rental car. At a hotel, common incidentals include room service, minibar snacks, laundry services, valet parking, and movie rentals. When you check in, the hotel usually places an "incidental hold" on your credit card (often $50–$100 per night) to ensure they can cover these potential costs. For business travelers, the "Incidentals" portion of a per diem often covers small, necessary costs like tips for bellhops or housekeepers, baggage handling fees, and small personal supplies. In car rentals, incidentals might include toll road charges, GPS rental fees, or fuel surcharges if the car is returned empty. Essentially, incidentals are the "pay-as-you-go" extras that enhance your trip but aren't part of the base fare. It is important to review your final bill at checkout to ensure that no "incidental" charges were added by mistake, such as a minibar item you didn't actually consume, as these holds can take several business days to disappear from your bank statement.