How much should I expect to pay above the car's price in taxes and fees?

It varies by state, county and dealer. Sales tax is often the largest piece, followed by title and registration, and then the dealer's doc fee and any add-ons. Some states have no sales tax but other titling charges, and doc fees range widely. The only reliable answer is an itemized quote for your ZIP code. OffLot's out-the-door estimate on each vehicle page uses an illustrative 6.25% tax plus $685 in fees to give a starting picture.