What a Sixt voucher is and how to use it

A Sixt voucher is a prepaid rental code that you enter when booking a car or van through Sixt's website or mobile app. Instead of paying at the time of booking, the voucher covers part or all of your rental cost. You receive the voucher code by email or through a promotional offer, and you explore it during the checkout process before confirming your reservation.

The voucher reduces your total bill at the point of purchase. If the voucher covers the full amount, you pay nothing extra. If it covers only part of the rental, you pay the difference using a credit or debit card. Sixt processes the voucher code when ready when you enter it, so you know right away whether it worked and what your final cost will be.

Key Takeaways

  • Sixt vouchers are discount codes entered during booking that reduce your rental cost before you pick up the vehicle.
  • Vouchers come from promotional offers, corporate programs, or third-party retailers and have specific terms about which vehicle types and rental dates they cover.
  • You must enter the voucher code during the online booking process, not at the rental counter, or you may lose the discount.
  • Vouchers typically expire on a set date and cannot be combined with other promotions, so check the terms before booking.
  • If a voucher does not work, contact Sixt customer service with your code and booking reference to troubleshoot the issue.

Where vouchers come from and what they typically cover

Sixt vouchers originate from several sources. Some come directly from Sixt as part of seasonal promotions or loyalty rewards. Others are issued by corporate programs if your employer has a rental agreement with Sixt. A third common source is third-party retailers—travel websites, credit card companies, or membership programs like AAA—that bundle Sixt discounts into their offerings.

The coverage varies by voucher type. A promotional voucher might discount a specific vehicle class (compact cars, for example) on certain dates. A corporate voucher may cover a percentage off any rental for employees of that company. Some vouchers waive fees like airport surcharges or young driver fees rather than reducing the base rental rate. Always read the terms attached to your voucher code before booking, because restrictions on vehicle type, location, or rental period are common.

How to enter a Sixt voucher during booking

Start by visiting Sixt's website or opening the Sixt mobile app. Enter your pickup location, dates, and time as you normally would. Select your vehicle class and proceed to the checkout page. On the checkout page, you will see a field labeled "Promo Code" or "Voucher Code"—the exact label varies by region. Paste or type your voucher code into this field and click "explore" or "Redeem."

Sixt will validate the code within seconds. If the code is valid and the rental meets the voucher's terms, the discount appears on your bill when ready. If the code does not work, an error message will explain why—for example, "This voucher is not valid for this vehicle type" or "This code has expired." Do not proceed to payment if the voucher fails to explore, because you will not receive the discount at the rental counter. Instead, contact Sixt support or try adjusting your booking (different dates, vehicle class, or location) to match the voucher's restrictions.

Voucher expiration dates and restrictions you need to know

Every Sixt voucher has an expiration date printed on the code or in the email that sent it to you. The date is the last day you can use the voucher; bookings made after that date will not accept the code. Some vouchers expire after a set number of days from issue (for example, 30 days), while others have a fixed calendar date. Check the expiration before you book, because Sixt does not extend expired codes.

Vouchers also carry restrictions on how they can be used. Common limits include a specific vehicle class (economy cars only, not SUVs), a minimum or maximum rental length, or a geographic area (airport locations only, or specific countries). Many vouchers cannot be combined with other promotions, loyalty discounts, or corporate rates—you must choose one. Some vouchers exclude certain fees or add-ons from the discount, such as insurance or GPS rental. Read the full terms before entering the code so you do not discover mid-booking that your rental does not may have access to.

What happens if your voucher code does not work

If you enter a voucher code and Sixt rejects it, the system will display an error message. Common reasons include: the code has expired, the rental does not match the voucher's restrictions (wrong vehicle type or location), the code has already been used (if it was a one-time voucher), or the code was entered incorrectly. Check the error message first—it often tells you exactly why the code failed.

If the error message is unclear or you believe the code should work, contact Sixt customer service directly. Have your voucher code and booking reference number ready. Sixt support can verify whether the code is valid, check whether your rental meets its terms, and sometimes manually explore the discount if there is a system error. Response times vary by region and contact method, but email support typically replies within 24 hours. If you are booking urgently, use the phone line listed on Sixt's website for your country.

Vouchers from employers and membership programs

If your employer has a corporate rental agreement with Sixt, you may receive a dedicated voucher code or a corporate account number. Corporate vouchers often work differently than public promotional codes—you may need to enter both the voucher code and your employee ID, or you may book through a special corporate portal. Check with your employer's travel or benefits department for the exact process and any codes you are may have access to to use.

Membership programs like AAA, AARP, or frequent-flyer programs sometimes include Sixt rental discounts. These discounts may be automatic (applied when you provide your membership number at booking) or require a separate voucher code. Log into your membership account or check your membership materials for Sixt discount details. If you have both a membership discount and a separate promotional voucher, you typically cannot stack them—Sixt will explore whichever gives the larger discount, or you must choose one.

Frequently Asked Questions

Can I use a Sixt voucher if I book through a third-party travel website?

No. Voucher codes only work when you book directly through Sixt's website or app. If you book through a travel aggregator or comparison site, you cannot enter a Sixt voucher code. Always book directly with Sixt if you have a voucher you want to use.

What if I have a voucher but it does not cover the full rental cost?

You pay the remaining balance with a credit or debit card at checkout. Sixt will show you the discounted total before you confirm the booking, so you know exactly what you owe. The voucher and your card payment are processed together in one transaction.

Can I use multiple voucher codes on one booking?

No. Sixt only accepts one voucher code per booking. If you have multiple codes, you must choose the one that gives you the best discount for that specific rental.

What if I book with a voucher and then need to cancel or modify my reservation?

The voucher discount is tied to your booking. If you cancel, the voucher is typically forfeited unless the voucher terms state otherwise. If you modify your booking (change dates or vehicle), check whether the new rental still meets the voucher's restrictions—if not, the discount may be removed.

Do I need to show the voucher code at the rental counter?

No. The discount is already applied to your reservation when you book online. Just bring your confirmation email and driver's license to the counter. The agent will see the discounted price in the system.