Hertz charges a service fee of $4.95 per day up to $24.75 per rental, plus tolls, also if you use it only once. Avis’ fees have increased from 58 percent to 70 percent since 2011, while Hertz’ fees have jumped from 98 percent to 148 percent over the same period. But you can reduce or avoid those charges two ways:
Bring your existing personal e-toll tag. Different electronic toll roads often use different technologies to identify you, your vehicle, and your account, and your e-tags may not work on another system. So a FasTrak tag won’t work on the E-ZPass system, but I-Pass tags used by the Indiana Toll Road and Chicago Skyway, will work on E-ZPass.
So, if you live in Chicago and drive a rental or your own car in any of the 15 states that use E-ZPass, make sure you bring your I-PASS tag with you. You don’t have to register with E-ZPass and I-PASS does not recommend adding your rental car license plate to your account. But be sure to properly mount the tag in the rental car. E-ZPass can likewise be used in Illinois and Indiana.
Similarly, bring your FasTrak tag if you live in northern California and rent a car in the southern part of the state. Ditto if you have an E-ZPass account and tag and you’re renting in another E-ZPass state. Check the rental car use rules if you have an account with another electronic tolling authority.
Buy a tag from the e-toll system you’re visiting. Some states let you set up a temporary e-toll account, so search the Internet for the transportation department of the state or states you're travelling to and check their bridge and highway e-toll options. The North Texas Tollway Authority, for example, will let you set up a temporary Zip-Pass account with a minimum $20 credit card deposit, and unused deposits are refunded when your account lapses.
The Florida Department of Transportation also sells temporary Sun-Pass Mini Sticker transponders for $4.95 and a minimum opening balance of $10 online and at Florida Turnpike service plazas and CVS, Publix, and other retail stores. These must be affixed to the windshield to work, but have special light-strength adhesive for easy removal at the end of your rental. E-ZPass, FasTrak, and I-PASS also sell temporary or regular tags for fair prices and refundable deposits. Typically, you must register the license plate of the rental car you're driving with your e-toll account to properly direct billing to you and not the rental company.