How to extend a Hertz rental on www.hertz.com

You can extend a Hertz rental directly through their website by logging into your reservation, finding the extension option, and selecting new dates. The process takes a few minutes if you have your confirmation number and the original rental agreement details. Hertz will show you the daily rate for the extension period and calculate the total cost before you confirm — you won't be charged until you approve the new dates.

The extension must be made before your current rental period ends. If you wait until after the return date, you'll be charged a late fee on top of the rental rate, and Hertz may report the vehicle as unreturned. The sooner you extend, the better your rate options and the clearer your agreement with the company.

Key Takeaways

  • Log into www.hertz.com with your confirmation number to view and modify your active reservation.
  • Extensions must be requested before your scheduled return date to avoid late fees and vehicle-unreturned charges.
  • Hertz shows the new daily rate and total cost on screen before you confirm, so you know the price before paying.
  • If you can't extend online, call the rental location directly — they can often process extensions over the phone.
  • Weekend and holiday rates may be higher than weekday rates, so the extension cost depends on which days you add.

Steps to extend your rental on the Hertz website

Start by going to www.hertz.com and clicking "Manage My Reservation" at the top of the page. Enter your confirmation number (found in your rental agreement or confirmation email) and your last name. Hertz will pull up your active reservation with the current return date and location.

Once your reservation appears, look for an "Extend Reservation" or "Modify Dates" button — the exact label varies depending on your browser and whether you're on mobile or desktop. Click it, and a calendar will appear showing your current return date highlighted. Select the new return date you need. Hertz will calculate the additional days and show you the rate per day for that period.

Review the new total cost, which includes the original rental charges plus the extension cost. If the price is acceptable, click "Confirm" or "Update Reservation." You'll receive a confirmation email with the new return date and updated total. Save this email — you'll need it when you return the vehicle.

What happens if the extension doesn't work online

Sometimes the online system won't allow an extension — this can happen if your reservation is flagged for a late return, if you're renting from a franchise location rather than a corporate Hertz site, or if there's a hold on your account. In these cases, you'll need to call the rental location directly.

Find the phone number for your rental location on www.hertz.com by entering your city or airport code in the "Find a Location" search. Call and give them your confirmation number. The agent can check vehicle availability for your new dates and process the extension over the phone. They'll take payment and email you an updated agreement. This usually takes 5 to 10 minutes.

How extension rates are calculated

Hertz charges a daily rate for each additional day you keep the vehicle. The rate depends on the car class you rented, the location, and the specific dates — weekend and holiday rates are typically higher than weekday rates. The rate you see online when you request the extension is the rate you'll pay; Hertz doesn't add surprise charges later.

Your extension does not reset your insurance or fuel options. If you prepaid for a full tank, you still return it full. If you chose the fuel service option (where Hertz charges you per gallon for fuel used), that continues through the extension. Check your original agreement to confirm which fuel option you selected.

Late return fees and what they cost

If you return the vehicle after your scheduled return time without extending first, Hertz charges a late fee. The fee structure varies by location and rental agreement type, but it typically ranges from a partial day charge to a full additional day charge, depending on how late you are. A return that's 30 minutes to 2 hours late may cost you a half-day or full-day rate; anything beyond that is usually a full day.

Late fees are separate from the rental rate itself, meaning you pay both the original rental cost and the late fee on top. This makes extending before your return date much cheaper than returning late. If you're unsure whether you'll make your return time, extend now rather than risk the fee.

What to do if you can't extend and need to return early

If your plans change and you need to return the vehicle earlier than your reservation, you can modify your reservation on www.hertz.com the same way you would to extend it. Select an earlier return date, and Hertz will refund the unused portion of your rental to your original payment method. The refund usually appears within 3 to 5 business days, depending on your bank.

Early returns don't incur fees. However, if you prepaid for a full tank and return the vehicle with fuel remaining, Hertz will not refund the unused fuel — you lose that money. If you chose the pay-per-gallon fuel option instead, you only pay for what you used, so an early return costs you less.

Frequently Asked Questions

Can I extend my rental multiple times?

Yes. You can extend as many times as you need before each return date. Each time you extend, you'll see the new rate for those additional days. There's no limit to the number of extensions, but you must request each one before the current return date passes.

What if my rental location is closed when I need to return?

If you're returning after hours, Hertz has after-hours return procedures at most locations — usually a drop box or an attended lot. Check your rental agreement or call the location before your return date to confirm their after-hours process. Extending your reservation is still the safest option to avoid late fees.

Do I need to update my insurance if I extend?

No. Your insurance coverage (whether you purchased Hertz's damage waiver or used your own) continues through the extension at no additional cost. The extension only adds rental days at the daily rate; insurance doesn't change.

What if I lose my confirmation number?

Check your email for the rental confirmation Hertz sent when you booked. If you can't find it, call the rental location directly with your name and driver's license number, and they can look up your reservation and process the extension over the phone.

Can I extend if I'm renting from an airport location?

Yes. Airport Hertz locations use the same online system as other locations. Log into www.hertz.com with your confirmation number to extend. If the online system doesn't work, call the airport location directly — their number is listed on the Hertz website under "Find a Location."