When making your travel budget, don’t assume that lodging and airfare will be your biggest expense. Now, more than ever, rental cars are shaping up to be one of the biggest - and stubbornly high - aspects of people’s vacation budgets.

While airfare and lodging prices are certainly near all-time highs, rental cars are among the biggest price increases of all travel expenses. When comparing prices for July 2022 versus July 2019 (the last normal summer pre-pandemic), hotel prices are up 7% , according to the latest set of Consumer Price Index data released in August 2022. Airfares are up 16%. But rental cars are up a whopping 48%.

Like most travel costs, rental car prices sharply dropped in April and May 2020 as people began calling off vacations to stay at home. But things began to turn around at the beginning of 2021 when prices began increasing every month, building up to a record high set in July 2021.

Road trips were especially hot that summer (thus high demand), but other factors - including a global semiconductor shortage and tourism industry labor shortages - contributed to low supply. In fact, leisure and hospitality sector employment remains 7.8% below pre-pandemic levels, according to an analysis of Bureau of Labor Statistics data from the U.S. Travel Association.

Prices have slightly dipped from the July 2021 record, but they are still far above pre-pandemic pricing.

NerdWallet conducted an analysis of 360 rental car reservations to better understand the cheapest ways to rent. Some of the findings may help you save on your next rental car.

Among the rental car companies in the analysis, Enterprise is usually the cheapest, while National is most expensive. The analysis also found that last-minute rentals are typically cheaper than those booked months in advance. And you’ll almost always save by booking at an off-site rental car location versus at the airport.

That knowledge can help you better understand the cheapest places to book, but sometimes booking from a specific location or company might be non-negotiable with the nature of your trip. These other tricks can still help you save:

- USE TRAVEL CREDIT CARDS: Some travel credit cards offer rental car insurance as part of their benefits, though it may exclude certain types of expensive cars or rentals in some countries. When it is applicable though, it can save you money on the extra insurance you might have otherwise signed up for at the counter.

- JOIN RENTAL CAR LOYALTY PROGRAMS: Benefits vary based on your level of elite status, though some levels can include free upgrades and waived fees. You might even get automatic status through a credit card. Yet even the entry-level, free-to-join tiers can include perks like priority lines.

- RESERVE NOW AND PAY AT THE COUNTER: Many rental car companies give you the option to pay at the counter. Paying upon pickup has two major benefits versus paying upfront: First, should you need to cancel your trip, you remove the headache of trying to get a refund since you won’t have put down any money anyway. Second, if rates drop, you can always cancel and rebook at a lower rate.

Throw in high gas prices, and road trips might be one of the most expensive ways to travel these days. Here are some ways to cut back on costs.

- USE APPS TO FIND CHEAP GAS: Apps like GasBuddy track local gas prices and can help you find the cheapest gas stations along your route.

- CONSIDER AN ELECTRIC VEHICLE: With an electric car, you’ll avoid paying for gas entirely. While you may still have to pay to charge it, some hotels offer free electric vehicle charging as a guest benefit.

- PLAN A BUDGET-FRIENDLY ROUTE: If you’re open-minded to location, consider driving through states with lower gas prices. During the last week of July, the three states with the lowest gas prices were Georgia, South Carolina and Texas, according to AAA data.

Before you get too caught up in the excitement of a road trip, make sure you can afford it. With prices so much higher than they were two years ago, you don’t want to get caught off guard. Hold off on booking your flights or hotels until you’ve compared rental car prices and included it in your trip budget.

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This article was provided to The Associated Press by the personal finance website NerdWallet. Sally French is a writer at NerdWallet. Email: sfrenchnerdwallet.com.