The 407 charges over 18c/km. One Saturday-afternoon trip from the 427 to Ninth Line cost me $10.60 according to their onsite calculator. That includes a “video toll charge” of $3.60, because I’m an occasional user and don’t have a transponder, and a per-month charge of $2.50 which is charged once for each month I drive on it. I get a bill, sent to the registered address of ownership of my car’s plates. Which means that if you drive someone else’s car on the 407 without a transponder, they get the bill.
On the other hand, I was doing just under 120 and I was the second-slowest vehicle on the road…