What travel partner should you credit car rentals to?

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I detest driving, so we haven’t owned a car in years, and I try my best to design vacations that don’t require a private vehicle. In recent years, that started to slip, and we started to rent cars 2-3 times a year. During the pandemic, the change accelerated when nearby driving vacations became the only ones available.

90% of the time we rent from Hertz simply because their nearby location typically offers the lowest prices on Autoslash, and I add my Hertz Gold Plus Rewards number to those reservations, but the main advantage seems to be saving my credit card, insurance, and fuel preferences: the program just isn’t that valuable.

In the last year, I’ve spent $936.64 on four Hertz rentals and earned a grand total of 737 points (one of the rentals didn’t credit to my account for some reason, either because Autoslash put me in an ineligible booking code or I forgot to re-add the reservation to my Hertz profile after booking through Priceline, a tedious necessity). That’s not quite enough points for a single day standard car rental subject to blackout dates, which costs 750 points.

It was only when I recently needed to make a reservation with Avis that I remembered it’s also possible to earn partner miles and points on these reservations. I had assumed that those partnerships were of trivial value, since the points you earn with a program are almost always more valuable than those earned with partners. That turned out to be exactly wrong: airline miles are almost always more valuable than points earned in rental car programs.

Since I wasn’t able to find any useful information about car rental programs on non-affiliate sites, I realized I needed to research and cover these programs more closely myself.

Hertz Gold Plus Rewards

The main problem with Hertz, and the reason it took me so long to figure out their rewards, is that their website is held together with twine. You can save partner loyalty account numbers to your Hertz account by navigating to “My Profile” and editing your “Membership Details” (don’t forget to hit “update” on the bottom of the page in order to save your accounts).

In principle, the terms of the program are clear that you must decide whether to earn Hertz Gold Plus Rewards points or partner loyalty points. In fact, I was able to submit a “Retroactive Credit Form” for two recent rentals and received an e-mail confirming two sets of 500 miles were headed to my Alaska Mileage Plan account. They haven’t arrived yet (they give themselves 4-6 weeks) and I don’t know if they ever will, but if so they represent a potential double dip opportunity.

Each partner loyalty program has its own earning rate, so the optimal choice depends on your precise rental:

Note that when crediting a rental to an airline partner, Hertz charges a surcharge to recover the excise tax; I’m not sure how or whether that surcharge is recovered when you request retroactive airline credit.

Avis

Avis’s website works a lot better than Hertz’s, and makes it easy to select an airline partner by navigating to “My Profile,” then “Rewards,” then editing your “Rewards Program.” You can select either “Avis Preferred Points,” or one of their partner loyalty programs.

As in the case of Hertz, earning rates vary by partner, so you’ll want to select a travel partner before each rental to maximize the value of your rewards. Here are my top choices:

Thrifty

I have my first Thrifty car rental coming up in December and while I’m not worried, I’m certainly frustrated by their primitive website; I haven’t even been able to create a “Blue Chip Rewards” account in order to save my partner loyalty programs and manage my reservation. Hopefully somebody else will notice and complain loud enough to get the site fixed by the time my reservation rolls around. In any case, as with the first two programs, you’ll want to choose which program to credit your rental to depending on its length:

National

Unlike the above three programs, National’s Emerald Club does earn rewards worth considering, especially if you make a lot of short rentals. Since you earn one “rental credit” for all rentals up to 7 days, and one free rental day for every 6 credits, the program can provide an outsized rebate value: 6 cheap one-day rentals earn you enough credits for an expensive one-day rental. If you find yourself spreading your car rentals across multiple companies, however, it may take you years to accumulate those 6 rental credits, and you’ll likely be better off crediting your rentals to one of their loyalty partners.

Conclusion

In my experience the price differences between rental car companies are so large, and the quality differences so small, that it would never make sense to be “loyal,” or even have a slight preference, for one rental car company over another. Your own situation may well differ, with the most obvious example being a company with a deeply discounted corporate rate that you can use on business and leisure trips alike. In that case, you might find rental car rewards worth earning on reimbursed travel and redeeming on your own vacations.

But unless you rent cars from the same company year-round, it’s likely worth tactically crediting your rentals to partner programs, based on their length, cost, and earning rate.