The fastest way to find the lowest price

The lowest car rental price is almost never on the rental company's own website. Instead, use a comparison site that pulls rates from multiple companies at once — Kayak, Autoslash, Priceline, or Hotwire are the most common. Type in your pickup location, dates, and time, and the site shows you every available rate side by side. This takes five minutes and usually saves you 20 to 40 percent compared to calling a company directly.

The second step is to check the rental company's website anyway, but only after you have seen the comparison price. Some companies (particularly Enterprise and Hertz) occasionally undercut the aggregators on their own sites. If the company's rate is lower, book there. If not, go back to the comparison site and book through it.

One important detail: comparison sites show the base rental rate, but they do not always show insurance, fuel charges, or airport fees upfront. Before you complete the booking, read the final price breakdown. Airport locations charge a facility fee — sometimes $5 to $15 per day — that off-airport branches do not. If you are renting at an airport, check whether a location two miles away has a significantly lower rate.

Key Takeaways

  • Comparison sites like Kayak and Autoslash show rates from multiple companies at once and usually beat the rental company's own website.
  • Airport rental locations charge facility fees that can add $5 to $15 per day, so check off-airport branches for the same dates.
  • The quoted price does not include insurance, fuel charges, or damage waivers — read the final breakdown before you pay.
  • Booking a compact car costs less per day than a sedan, but the daily rate difference is usually smaller than the fuel cost difference over a week-long trip.
  • If you rent for a week or longer, some companies offer weekly rates that are cheaper per day than daily rates for the same period.

When to book and what day of the week matters

Rental prices change based on demand, which shifts by day of the week and season. Weekday rentals (Monday through Thursday) are typically cheaper than weekend rentals at the same location. If your trip is flexible, moving your rental from a Friday to a Thursday can cut the daily rate by 15 to 30 percent.

The time of year also affects price. Summer (June through August) and major holidays are peak season, when rates are highest. Winter months (January through March, excluding Presidents' Day weekend) and early fall (September and early October) are usually cheaper. If you are planning a trip months in advance, booking during a low-demand season saves more money than any other tactic.

Book as far in advance as you can, but check the price again one week before your rental. Rates can drop if demand falls, and most comparison sites let you set price alerts. If the price drops, you can usually cancel and rebook at the lower rate without penalty.

Choosing the right car size and rental length

The daily rate for a compact car is lower than for a sedan, but the difference is often only $5 to $10 per day. However, a compact car uses less fuel, which matters on longer trips. For a week-long rental, the fuel savings on a compact car can exceed $30 to $50 compared to a full-size sedan. Run the math: add the daily rate difference to the estimated fuel cost, then decide.

Weekly rates are almost always cheaper per day than daily rates. If you need a car for five or six days, check the price for a full week — you may pay less for seven days than for six. Some companies also offer three-day rates that are cheaper per day than daily rates, so compare all three options.

Avoid renting from an airport if you only need the car for one or two days. The facility fee can add $10 to $30 to your total cost. For short rentals, an off-airport location or a car-sharing service like Zipcar or Turo may be cheaper.

Insurance and damage waivers: what you actually need to pay for

Rental companies charge for damage waivers and liability insurance separately from the daily rate. Your personal auto insurance may already cover rental cars, so check your policy before you pay for the rental company's coverage. If your policy covers rentals, you can decline the rental company's damage waiver and save $10 to $25 per day.

If you do not have personal auto insurance or your policy does not cover rentals, you have two options: buy the rental company's damage waiver (called a collision damage waiver or CDW), or use a credit card that covers rental car damage. Many premium credit cards (American Express Platinum, Chase Sapphire Reserve, and others) include rental car coverage at no extra cost. Check your card's benefits before you book.

Liability insurance is separate from damage coverage. It covers injury or property damage you cause to other people. Your personal auto insurance usually covers this, but confirm it before you decline the rental company's liability coverage.

Membership programs and discount codes

Rental companies offer membership programs that give discounts on future rentals. Enterprise Plus, Hertz Gold, and Avis Preferred are free to join and typically save 10 to 15 percent on the base rate. If you rent a car more than once or twice a year, joining takes two minutes and pays for itself.

AAA membership, AARP membership, and military status all come with rental car discounts. Enter your membership number when you book, and the discount applies automatically. These discounts stack with membership programs in some cases, so try entering both.

Discount codes from travel websites, employer programs, or credit card issuers can save an additional 5 to 10 percent. Search "[rental company name] discount code" before you book, or check whether your employer or credit card issuer has a travel portal with pre-negotiated rates.

Fuel charges and how to avoid them

Rental companies charge for fuel in one of two ways: you can prepay for a full tank at the rental counter (usually $5 to $8 per gallon, higher than gas station prices), or you can return the car with a full tank and pay the company's pump price for whatever fuel you used. The second option is cheaper if you return the car with most of the tank full.

Some rental companies charge a fuel service fee on top of the pump price — typically $5 to $10 — if you do not return the car with a full tank. Read the rental agreement to see whether this fee applies. If it does, fill the tank yourself at a gas station near the rental location before you return the car. This costs less than the rental company's fuel price plus the service fee.

Do not prepay for fuel unless you know you will return the car on empty. Most renters return the car with fuel remaining, which means they pay the rental company's high per-gallon price for fuel they did not use.

Alternative rental options for specific situations

If you need a car for only a few hours or one day, a car-sharing service like Zipcar, Turo, or Hourly may be cheaper than a traditional rental. These services charge by the hour or day and do not require a facility fee. They are most cost-effective in urban areas where multiple locations are nearby.

If you are renting in a major city and do not need a car every day, public transportation or ride-sharing (Uber, Lyft) may cost less than a rental plus parking. Calculate the total cost of all three options before you book.

If you are renting for a month or longer, some companies offer monthly rates that are significantly cheaper per day than weekly rates. Ask the rental company directly about long-term discounts, as these are not always shown on comparison sites.

Frequently Asked Questions

Do I have to buy insurance from the rental company?

No. Check your personal auto insurance policy first — most policies cover rental cars. If your policy covers rentals, you can decline the rental company's damage waiver. If you do not have personal insurance or your policy does not cover rentals, you can use a credit card that includes rental car coverage instead of buying the rental company's insurance.

Why is the price different on the rental company's website versus a comparison site?

Comparison sites negotiate rates directly with rental companies, and those rates are sometimes lower than what the company advertises on its own website. Occasionally a rental company offers a lower rate on its own site to avoid paying the comparison site's commission. Check both before you book.

Can I cancel or change my rental dates after I book?

Most rental companies allow free cancellation or date changes up to 24 hours before your pickup time. Check the terms when you book. Some discount codes or prepaid rates do not allow changes, so read the fine print.

What happens if I return the car late?

Late returns are charged at the daily rate or an hourly rate, depending on how late you are. Some companies charge a flat fee for returns up to one hour late. Check the rental agreement for the specific policy. Returning the car on time is cheaper than paying a late fee.

Is it cheaper to rent from an off-airport location?

Usually yes. Airport locations charge a facility fee that off-airport branches do not. For a week-long rental, the facility fee can add $35 to $105 to your total cost. If you can get to an off-airport location, compare the price difference — it often exceeds the cost of a taxi or ride-share to the airport.