You can extend a Hertz rental by calling the location directly, using the Hertz mobile app, or logging into your online account — but the price depends on current demand and how far ahead you book the extension.
Extending a Hertz rental is straightforward if you do it before your return date. The rental location will calculate a new rate based on the current market price for that car class on the dates you need it, not the rate you originally paid. This means an extension can cost more or less than your initial daily rate. You'll pay the difference at the time you confirm the extension, or it will be charged to your original payment method.
The earlier you extend, the better your chances of keeping costs predictable. Extending a day or two before your return date is usually straightforward. Extending on the day you're supposed to return, or after hours, may be harder — some locations have limited staff availability, and you risk being charged a late fee if you keep the car without formally extending first.
Key Takeaways
- Call your Hertz location directly, use the Hertz mobile app, or log into your account online to request an extension before your return date.
- Extension rates are based on current market demand for that car class, not your original daily rate, so the cost per day may be higher or lower.
- Extending several days before your return date gives you more options and clearer pricing than extending at the last minute.
- If you keep the car past your return time without extending, Hertz will charge a late fee in addition to the daily rental rate.
Three ways to request an extension
Call the rental location directly. This is the fastest method if you're close to your return date. Look up the phone number on your rental agreement or the Hertz website. Have your reservation number ready. The agent will tell you whether the car class is available for the dates you need and quote you a price on the spot. You can confirm and pay when ready, or ask for time to think about it.
Use the Hertz mobile app. Open the app, find your active reservation, and select "Modify Reservation" or "Extend Rental." The app will show available dates and calculate the new total cost. You can complete the extension without calling. This works best if you have a few days' notice.
Log into your Hertz account online. Go to hertz.com, sign in, and find your reservation under "My Reservations." Click to modify it and select the new return date. The system will show pricing and let you confirm the change. Like the app, this method works well when you're planning ahead.
How extension pricing works
Hertz sets rental rates based on demand for each car class on each date. If you rented a midsize sedan for $45 a day last week, that same car might cost $55 a day this week if demand is higher. When you extend, you pay the rate that applies to the new dates, not the original rate.
This can work in your favor or against it. If you're extending into a slower rental period, the daily rate may drop. If you're extending into a peak travel time — a holiday weekend, for example — the rate will likely rise. There's no way to lock in your original rate once it expires.
You'll also pay any applicable taxes and fees on the extension. Hertz charges a facility fee at most locations, and some airports add a concession recovery fee. These are calculated on top of the daily rate, just as they were on your original rental.
What happens if you don't extend and keep the car anyway
If your return time passes and you still have the car, Hertz will charge you a late fee. The amount varies by location but typically ranges from $40 to $75 for the first few hours, then additional daily charges if you keep it longer. These fees stack on top of the regular rental rate, making it much more expensive than extending would have been.
Late fees also appear on your credit card statement separately from your rental charges, which can make your bill confusing to review. More importantly, if you're significantly late, Hertz may report the car as not returned and file a claim with your credit card company or insurance, which can affect your ability to rent from them in the future.
The safest approach: if you think you might need the car longer, extend it before your return time. Even if you end up returning it early, you can usually cancel the extension without penalty if you do so before the new return date.
Extending at the airport versus off-airport locations
Airport locations often have higher daily rates and more aggressive late fees than off-airport branches. If you're renting from an airport, extending there will reflect airport pricing. Some travelers find it cheaper to return the car on time at the airport and rent again from an off-airport location if they need it longer, but this only makes sense if the off-airport location is convenient and you have time to make the switch.
Airport locations also tend to have longer hours, so extending at an airport is usually easier outside normal business hours. Off-airport locations may close in the evening or on Sundays, which can make a last-minute extension difficult.
When extension requests get denied
Hertz may not be able to extend your rental if the car class you have is fully booked for the dates you need. This happens most often during peak travel seasons or in smaller markets with limited inventory. If your extension is denied, you have a few options: return the car on time and rent a different car class for the extra days, return the car and rent from a different company, or ask Hertz to put you on a waitlist in case a cancellation opens up.
Some rental agreements, particularly those tied to corporate or loyalty programs, may have restrictions on extensions. Check your original agreement or call the location to confirm there are no limits before you need the extension.
Frequently Asked Questions
Can I extend my rental if I'm not at the location?
Yes. You can extend online, through the app, or by phone without being present. The new return date will be set in the system, and you'll pay the extension cost to your original payment method. Just make sure you actually return the car by the new date you set.
Will I be charged a fee for extending my rental?
No extension fee exists — you only pay for the additional days at the current market rate. However, if you keep the car past your return time without extending, you'll owe a late fee on top of the daily charges.
What if I extend and then need to return the car early?
Most Hertz extensions can be cancelled without penalty if you cancel before the new return date. Contact the location or use the app to modify your reservation back to the original date. You'll be refunded the cost of the days you no longer need.
Can I extend multiple times?
Yes, you can extend as many times as you need, as long as the car remains available. Each extension is priced based on current market rates for those dates. There's no limit to the number of times you can modify your reservation.
Do I have to return the car to the same location if I extend?
Yes, unless you arrange a one-way rental change when you extend. One-way rentals usually cost more. If you need to return to a different location, mention this when you request the extension and ask about the additional charge.