When Should You Book a Rental Car? Why Last-Minute Bookings Beat Advance Reservations

Here’s something that’ll flip your travel planning strategy upside down: the best time to book a rental car isn’t months ahead—it’s a week before you need it. Or even just three days out. According to NerdWallet research from 2022 analyzing 360 rental car prices across eight major U.S. companies, booking early doesn’t save you money. It costs you it. The data revealed customers pay an average of $75 more—roughly 15% extra—for a week-long rental booked three months in advance compared to the same rental reserved just seven days before. That’s a significant premium for planning ahead.

The Data Shows Last-Minute Bookings Are Significantly Cheaper

The pricing advantage of last-minute bookings held true across every rental car company studied: Alamo, Avis, Budget, Dollar, Enterprise, Hertz, National, and Thrifty. But the savings varied dramatically by company. Enterprise showed the starkest difference, with advance bookings running nearly 40% more expensive than last-minute ones. Even Dollar, which had the smallest gap, still charged more for three-month-advance reservations. Here’s how the costs compared:

• Enterprise: 38.63% more for advance booking
• Thrifty: 14.77% more
• Alamo: 13.56% more
• Hertz: 11.01% more
• National: 6.23% more
• Budget: 6.21% more
• Avis: 5.68% more
• Dollar: 2.09% more

The pattern was consistent: wait longer, pay less.

Why Rental Car Companies Price This Way

So what drives this counterintuitive pricing? Several factors collided during this period. Supply chain disruptions made cars scarce and expensive. Pandemic-driven hesitation about flying sparked a surge in road trip demand. Plus, the travel industry was struggling to keep up with rebounding demand after 2020’s slowdown.

Michael Taylor, travel intelligence lead at J.D. Power, explains the phenomenon through the lens of modern pricing algorithms. “Rental car pricing algorithms have gone through a period of unexpected change,” he notes. “The surging demand, coupled with the lack of rental cars available system-wide, has seemingly caused pricing models to fluctuate much more than in the past.”

There’s another dynamic at play: fleet repositioning. Travelers often fly into one city and out of another, creating demand for one-way rentals. When rental companies can’t predict where vehicles will end up (especially post-pandemic when travel patterns shifted), they set high advance prices as a buffer. But as the rental date approaches and they see actual demand patterns, they may drop prices last-minute to fill remaining inventory or incentivize drivers to return cars to needed locations.

The Smart Booking Strategy: Security Plus Savings

Even though the numbers favor last-minute booking, there’s a real risk to leaving it that late. During peak travel seasons or in popular destinations like Hawaii, last-minute inventory can disappear fast—and horror stories exist of travelers booking last-minute rentals only to face shock charges exceeding $1,000. With rental car shortages, you could find yourself stranded in a city with no public transportation options.

Here’s the strategy that gets you the best of both worlds: Reserve your car immediately, but choose the “pay at the counter” option (most major rental companies allow this). This locks in your reservation without prepaying. Then, in the weeks before your trip, periodically check if prices have dropped. If they have, cancel your original booking and rebook at the lower rate. Since you didn’t prepay, most companies won’t charge you a cancellation fee.

This approach lets you sleep at night knowing your rental is guaranteed while still capturing last-minute savings if prices fall. The best time to book a rental car isn’t months out or midnight before—it’s strategically: secure it early, then stay alert for better deals.