The first and most important advice is that you should never be blinded by a cheap, fabulous day rate for the rental vehicle you’re planning to book. Depending on your travel destination a lot of extra charges may apply, like airport surcharges, insurance, sales taxes, licensing fees, local and state taxes, concession recovery fees, customer facility charges, mandatory theft protection, young driver fees to name just a few. By the time all the extra charges are added onto your bill, you may find yourself paying almost double the cheap car rental base rate you were quoted.
Original text: How to Avoid Hidden Costs on Your Next Car Rental in Spain