Customers may opt-in at the counter or upon vehicle return, before the rental agreement closes. Customers who do not purchase e-Toll Unlimited for their rental vehicle at the time of rental, but use cashless toll lanes without another payment method approved by the toll authority, will be charged the cost of each toll at the toll authority’s highest undiscounted toll rate PLUS an administrative fee. AVIS/BUDGET customers: $5.95 per calendar day when tolls are incurred ($29.75 maximum administrative fee per rental month).