Sixt Rent-A-Car is offering Sixt ONE members the opportunity to pre-pay for up to a full tank of fuel upon return for $49.99 for rentals picked up between now and May 31st, 2026. That’s not necessarily a great deal for a tank of gas, depending on the vehicle and the cost of gas wherever you are, but if you’re pretty confident that you’ll return the car relatively low, it represents a really small premium over what you will normally pay for refueling costs if you fail to fill up before returning the car.
The Deal
- SIXT Rent a Car is offering an flat rate of $49.99 for a full tank of gas on any vehicle at any SIXT location in the United States when you reserve and pick up by May 31st, 2026.
- Direct link to this deal
Key Terms
- Offer valid for US customers with pickup location in the US.
- Flat fee of $49.99 for the add-on “Prepaid Fuel” at participating locations in the US, when added during the booking process.
- Prepaid Fuel: return the vehicle, regardless of the fuel level. We’ll take care of refueling – the final fill-up is already included in the price. This also applies to electric vehicles.
- Reservation must be made by May 31, 2026.
- Rental period: pickup between May 8, 2026 and May 31, 2026.
- Valid rental length: 1-27 days.
- Valid for all vehicle categories (excluding vans and trucks).
- The availability of specific makes and models may vary depending on the country.
- This offer can be applied alongside your SIXT ONE status benefits, where applicable and is subject to SIXT ONE terms and conditions.
- Standard SIXT rental terms and conditions apply to each individual rental.
What is a Qualifying Rental?
Qualifying Rentals are defined in the SIXT ONE Terms and Conditions and refer to certain rentals in which you can earn Status and/or Rental Points.
Non-qualifying rentals are booked for pickup at non-participating SIXT locations or they fall into these categories: Replacement rentals, Long-term rentals (28 days and longer), SIXT plus, SIXT ride, SIXT share. For a complete list of terms, visit our Terms and Conditions.
Quick Thoughts
Depending on the cost of gas wherever you’re renting and the size of the tank for the vehicle you’re renting, this might not even represent a savings for a full tank of gas. However, if you’re renting an SUV or a minivan and you intend to use the entire tank, $49.99 is cheaper than what you’ll pay to fill up in some markets. We were in California last month, and when I refilled the car on the way to the airport, I paid $5.79 a gallon.
That said, I usually avoid prepaying for fuel. It’s ordinarily a pretty bad deal, particularly since you probably already aren’t going to drive around on a perpetually near-empty tank. It can be hard to predict what the fuel level will be when you return the car. I would only consider this in circumstances where I expect to use a substantial portion of the tank and where the time savings of not having to stop and refuel on the way to the airport are meaningful to me.
Still, this is a much better deal compared to the normal cost of getting your car refueled if you fail to do it before going to the airport. At least one time, I recall being in enough of a hurry that I didn’t have time to stop for gas before the airport, and I got hit with a charge of around $85 to refill the tank. That was at a time when gas was significantly less expensive than it is today, so I don’t know what it would be these days. I even once returned a car where I had used almost no fuel at all without refilling on the way back to the airport, and I got hit with a charge for $25 to refill it with what probably amounted to less than a gallon.
Keep in mind that there’s a current Amex offer for $100 back on $500 or more at Sixt locations in the United States. Alternatively, there is a Citi merchant offer for 10% back when you spend $200 or more. Either of those offers should stack with this refueling offer. This prepaid fuel offer might become more relevant for someone who is very close to meeting one of those spending thresholds, since you might end up saving more by adding the prepaid fuel in order to reach the threshold for the Amex offer or City Merchant offer.
Stephen and I received this offer via email as Sixt Platinum members, but according to the press release, this is available for all Sixt ONE members. You should see the opportunity to add prepaid fuel for $49.99 during the booking flow at sixt.com. Don’t forget to go through a shopping portal. Just this morning, I received an offer for 30% back at Sixt via Capital One Shopping. That should stack as well. Given that offer, this might start to look like an even better deal. Depending on how you value the Capital One shopping rewards, 30% back on $49.99 could make for a relatively cheap tank of gas. Again, it really just depends on how confident you are that you’ll be able to return the car relatively empty.
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