If you wish to add more days to your Sixt car rental, you can do it effortlessly by following the Sixt car extension process mentioned here. Sixt car rentals can be extended up to a total of 28 days with a successful authorization but over 28 days, a new reservation and rental agreement will require. All the car rental extensions can be done manually through the online method, which is instructed down below:

Steps to extend Sixt car rental reservation

With the help of your reliable web browser, open Sixt official website https://www.sixt.com/
Click on the "Manage Booking" tab present on the top-right screen. https://www.sixt.com/account/#/manage-my-booking-info
Now enter your "Booking number" and the "email address", then click on the continue button.
Your Sixt booking details will appear on the next window; navigate the modify button and make the necessary changes.
At last, follow the onscreen instructions to extend the date of your Sixt car rental.

Users can also contact the Sixt customer service for the Sixt car hire extension by dialing +1-888-749-8111 to speak with the agent and also contact by sending an email at reservations-usa@sixt.com. The customer executive of the Sixt support team will help you any time with the exact solution.

How long does Sixt hold your reservation?

Sixt offers you the facility to hold all the car rentals up to 28 days of the successful authorization. Therefore you can easily hold the Sixt car rental booking through manage booking section. You need to pay some amount to hold the reservation for the stimulating time period. To hold the reservation after 28 days, you need to make a new booking for which new rental agreements will apply.

How much does it cost to extend Sixt car rental?

According to Sixt extension policy, all car renters are charged on a 24-hour billing cycle. If a customer returns the car after the grace period that is of 30 minutes, then a full day charges applicable. That late fee on your reservation is calculated on the basis of specific factors.