Can you add days to a car rental?

Currently, only Fox and Hertz offers the option to extend a car rental online. Several companies, including Avis, Hertz, Silvercar, National and Audi, allow customers to extend an existing rental through a mobile app. So if you need an extension, you might have to pick up the phone. All rentals can be extended up to a total of 28 days with a valid authorization.

You can easily extend your active rental through the self-service link below. It's one thing to add a few days to your trip. In fact, most rental companies will be happy to offer you more rental days. But extending your rental car booking and delivering it late are two entirely different scenarios.

Changes that may affect your fare include extending or shortening the trip, changing the rental location, or even something as simple as adding a child seat. When you extend your trip, you may think it's okay to keep the car for a couple more days without notifying your rental company. If you have a low price for a midweek rent and want to keep it until Sunday, expect to pay more for those weekend days than for weekdays. New car rental alternatives have emerged in recent years, including peer-to-peer rentals, where people post their rental cars online.

Select the GPS and booster seat add-ons if you need them and confirm that you have the car for as long as you need it. Most car rental companies guarantee the stated rate when booking the vehicle, but a small fine print in most contracts stipulates that the rate may change if a change is made to the reservation. If you've already booked a rental car and set your rate, don't change your booking without confirming that the new rate is no higher than what you're willing to pay. The best thing to do when you want to know how to extend your car rental is to do your research ahead of time.

If you decide to extend your next trip by a couple of days or even a couple of hours and that trip involves a rental car, be careful. Also, keep in mind that the daily rate you set for the original rental period may not be the same rate you are charged for the additional days. Many of the major car rental companies are on the same page when it comes to how they handle extension requests. So, when the schedule changes due to a flight delay, weather issues, or simply a desperate need to spend a few more days on an incredible vacation, you probably need to extend your car rental as well.

The major car rental companies are quite consistent across the board when it comes to how they handle extension requests. Or, if those long days start to turn into a busy travel season, you'll run into an expensive daily rate. For example, if you picked up your order at noon on the first day and returned at noon on the second day, you are within the 24-hour billing period and will be charged for one day.