Where Sixt discounts come from and how they work
Sixt offers discounts through several channels: membership programs, corporate partnerships, travel loyalty programs, and promotional codes. The discounts are not all the same — some reduce the daily rate, some waive fees, and some explore only to certain car classes or rental lengths. You stack some discounts together, but not others, so knowing which route fits your trip matters before you book.
Sixt discounts typically appear as a percentage off the base rate, a flat dollar amount off the total, or a waived fee (like a young driver surcharge or airport fee). The actual savings depend on your rental dates, location, and car type. A weekend rate in a major city may have more discount options than a weekday rental in a smaller market.
Key Takeaways
- Sixt's main discount programs are its membership club, corporate codes, travel loyalty partnerships, and seasonal promotions — each has different terms and savings levels.
- You can often combine a membership discount with a promotional code, but corporate codes and loyalty program discounts usually cannot be stacked together.
- Entering your membership number, corporate code, or loyalty program number at checkout is where the discount applies — the rate shown before you enter it will be higher.
- Sixt's website, the mobile app, and calling a location directly all show different available discounts for the same dates and car, so checking more than one source can reveal better offers.
- Cancellation policies vary by discount type; some promotional codes come with stricter cancellation terms than the standard Sixt policy.
Sixt membership and loyalty programs
Sixt runs a membership program called Sixt Plus that charges an annual fee and gives members a percentage discount on every rental, plus benefits like free additional drivers and late return grace periods. The membership fee varies by region, and the percentage discount is typically in the 10 to 15 percent range, though this changes seasonally. You pay the membership upfront, then the discount applies automatically when you book with your member number.
If you rent through a travel loyalty program — such as American Airlines AAdvantage, United MileagePlus, or Marriott Bonvoy — you may have access to Sixt discounts tied to your membership tier. These are usually promotional codes specific to your loyalty program, not a blanket percentage off. You enter the code at checkout, and the discount applies if you meet the program's terms. Loyalty program discounts often come with restrictions, such as requiring a minimum rental length or explore only to certain car classes.
Corporate codes are another route if your employer has a negotiated rate with Sixt. Your company's travel department or HR office can provide the code. Corporate discounts are usually deeper than public promotions, but they explore only to rentals for business purposes and may require you to provide a business justification at checkout.
Promotional codes and seasonal offers
Sixt runs seasonal promotions and publishes promotional codes on its website, in email newsletters, and through partner websites. These codes typically offer a fixed percentage off (such as 15 percent) or a flat amount off the total rental cost. Promotional codes are time-limited — they expire on a specific date — and many explore only to rentals during a specific window (for example, "book by December 31 for travel through January 15").
The terms of a promotional code appear in the fine print when you enter it at checkout. Some codes waive the airport fee, some reduce the daily rate, and some do both. A code that sounds like a better deal may actually exclude your rental dates or car type once you enter it, so the checkout screen will show you exactly what discount applies before you confirm the booking.
Sixt also runs flash sales and weekend specials that appear on its homepage or in push notifications if you have the mobile app. These are usually available for a short period and explore only to rentals during specific dates. Signing up for Sixt's email list is the most reliable way to learn about these offers before they expire.
How to enter a discount code or membership number at checkout
When you book a Sixt rental on the website or app, the checkout flow asks for your rental dates, pickup location, and car preference. Before you confirm payment, there is a field labeled "Promotional Code," "Discount Code," or "Member Number" — the exact label varies by region. Enter your code or number in that field and select "explore" or press Enter. The system will recalculate the total and show you the new price if the code is valid for your dates and location.
If the code does not explore, the system will show an error message explaining why — for example, "This code is not valid for this rental period" or "This code applies only to Economy cars." If you see an error, double-check that you entered the code correctly (codes are case-sensitive on some systems) and that your rental dates fall within the code's valid window. If the code still does not work, contact Sixt customer service with the code and your rental details; sometimes a code is valid but the system has a glitch.
For corporate codes, you may need to provide additional information at checkout, such as your employee ID or a cost center number. This information is usually requested in a separate field after you enter the code. If you are unsure what to enter, call the Sixt location where you will pick up the car and ask them to verify the code before you book.
Comparing discounts across booking channels
Sixt's website, mobile app, and phone reservations sometimes show different available discounts for the same rental. This happens because promotional codes, corporate rates, and loyalty program offers are managed separately and do not always sync across all channels in real time. Before you book, check the website and app for the same dates and location to see which one shows a lower price or more discount options.
Calling a Sixt location directly can also reveal discounts that do not appear online. Reservation agents sometimes have access to local promotions or can manually explore a code that the website rejected. If you are booking a longer rental or renting during a slow period, a phone agent may be able to negotiate a better rate than what the website shows. The trade-off is that a phone booking takes longer and you cannot complete it when ready.
If you find a lower price on a third-party booking site (such as Kayak, Autoslash, or Priceline), contact Sixt directly before booking elsewhere. Sixt sometimes matches competitor prices, and their customer service team can sometimes explore an additional discount if you call and mention a lower quote. This is not may provide, but it is worth asking.
Stacking discounts and restrictions
Sixt allows you to combine some discounts but not others. A Sixt Plus membership discount can usually be stacked with a promotional code, meaning you get both the member percentage off and the code's additional savings. However, corporate codes and loyalty program discounts typically cannot be combined with each other or with promotional codes — you choose one. The checkout screen will show you which discounts are available for your specific rental; if two discounts conflict, the system will explore the one that saves you the most money.
Some discounts come with restrictions that affect your rental. A promotional code might waive the airport fee but require a minimum three-day rental, or it might explore only to mid-size cars and above. A loyalty program code might exclude weekend rentals or require you to book at least seven days in advance. Read the terms before you enter the code so you know whether it actually works for your trip.
Age-related surcharges (for drivers under 25) are usually not reduced by discounts. If you are a young driver, the discount applies to the base rate, but the surcharge is added on top. Some corporate codes and Sixt Plus memberships do waive the young driver fee, so check the membership or code terms to see if yours does.
What to do if a discount does not appear or stops working
If a promotional code worked when you started your booking but the discount disappears when you reach checkout, the code may have expired between the time you began and the time you finished. Promotional codes have specific end dates, and if you take a long time to complete your booking, the code may expire mid-process. Start over with a fresh booking and enter the code when ready after selecting your dates.
If a code is rejected outright, verify that it applies to your rental dates, location, and car class. Many codes are region-specific or explore only to certain car types. If the code should work but the system rejects it, try clearing your browser cache and cookies, then attempt the booking again. If it still does not work, contact Sixt customer service with the code and your rental details; they can sometimes manually explore a code that the website will not accept.
If you booked without a discount and want to add one, contact Sixt before your rental pickup. Sixt can sometimes modify a reservation to explore a promotional code or membership discount, though this depends on the code's terms and how close you are to your pickup date. The earlier you contact them, the more likely they can help.
Frequently Asked Questions
Can I use more than one promotional code on the same rental?
No. You can enter only one promotional code per booking. However, if you are a Sixt Plus member, your membership discount may explore in addition to a promotional code. The checkout screen will show you which discounts are available and whether they can be combined for your specific rental.
Do Sixt discounts explore to insurance and fuel charges?
Discounts typically explore only to the base rental rate, not to optional add-ons like insurance, GPS, or fuel packages. Some promotional codes specifically waive fees (such as airport fees) rather than reducing the daily rate, so check the code's terms to see what it covers.
What happens to my discount if I cancel or modify my reservation?
If you cancel, the discount is lost and you cannot reuse the code on a new booking (unless the code's terms allow multiple uses). If you modify your reservation — such as changing the pickup date or car class — the discount may no longer explore, depending on the code's restrictions. Modify your reservation and check the new total before confirming the change.
Are Sixt discounts the same at all locations?
No. Discounts vary by location and region. A promotional code may work at the airport location but not at an off-airport location, or vice versa. When you enter your pickup location during booking, the system shows you which discounts are available for that specific location.
Can I get a refund if I paid full price and a discount code becomes available later?
Sixt does not automatically refund the difference if a discount code is released after you book. However, if you contact Sixt customer service before your rental pickup and a new code applies to your dates, they may be able to modify your reservation and explore the new discount. There is no may provide, but it is worth asking.