Score $100 Back on Your Next Sixt Rental with This Amex Offer

If you've got a road trip or business travel coming up, here's a deal that could put some real cash back in your pocket. American Express has rolled out a targeted offer for Sixt car rentals that gives you $100 back after you spend $500 or more. And the best part? You might be able to stack it with other savings for a seriously discounted rental.

What's the Deal?

American Express has a new targeted offer that's worth a look if you rent cars. Enroll in the offer, then spend $500 or more at Sixt Car Rental, and you'll get $100 back as a statement credit. That's a solid 20% return on your rental cost.

The offer is valid for online bookings made through the US Sixt website. You'll need to make your purchase by September 15, 2026, and the rental must be paid for by May 31, 2026, to qualify. Keep in mind, this is only for purchases in US dollars.

• Enroll in the Amex Offer before booking
• Spend $500+ on Sixt car rental at sixt.com
• Receive $100 statement credit automatically
• Offer expires 9/15/26; payment must be made by 5/31/26

Stacking for Extra Savings

Here's where things get interesting. If you've been targeted for Capital One Shopping offers at Sixt — and many people have been seeing 30% to 45% back — you can combine that with this Amex Offer. That could mean getting nearly half your rental cost back in total rewards.

I've personally seen these Capital One Shopping deals pop up in emails recently, so it's worth checking your account before you book. Just make sure you activate both offers and use the right payment method to qualify for each.

• Check Capital One Shopping for Sixt cashback offers (up to 45% reported)
• Use your enrolled Amex card to pay for the rental
• Stack both offers for maximum savings
• Book online at sixt.com to meet the Amex Offer requirements

A Word of Caution on Rental Coverage

One thing to keep in mind: American Express rental car insurance isn't as strong as what you get with some other cards. If you usually rely on your card's coverage, you might want to think twice before paying with Amex. But given the potential savings here — especially if you stack with Capital One Shopping — it could be worth buying extra coverage from Sixt or a third party.

Also, make sure you read the fine print on Sixt's rental eligibility requirements. Some locations or vehicle types may not qualify, so confirm before you book.

Bottom Line

• Targeted Amex Offer gives $100 back on $500+ Sixt rental
• Stack with Capital One Shopping for up to 45% additional cashback
• Book online at sixt.com and pay by 5/31/26 to qualify
• Consider purchasing extra rental coverage if using Amex

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