The cost of canceling a Hertz reservation depends entirely on the type of rate you booked and the timing of your cancellation. If you chose a "Pay Later" (non-prepaid) reservation, you can typically cancel for free at any time before your scheduled pickup without penalty. However, for "Pay Now" (prepaid) reservations, the rules are stricter. Usually, if you cancel at least two days (48 hours) before your pickup time, you will receive a full refund minus a modest administrative processing fee (often around $50-$100 or €45-€90 depending on the region). If you cancel within 48 hours of your pickup, the fee is higher, and if you are a "no-show"—meaning you don't cancel and don't show up—you may forfeit the entire prepaid amount or be charged a significant "No Show" fee. It is important to note that these policies can vary by country; for example, Hertz Europe has specific tiered charges. Always check your specific booking confirmation to see if you are within the "grace period" for a full refund.