Parking in Amsterdam is generally paid for by purchase of a ticket from a vending machine. If you don't pay or stay longer than you have paid for you will be wheel clamped. The price for removal is a minimum of Dfl 125.00.
If you are clamped for more than 24 hours, or are parked in a "No-Parking" zone you will be towed away. A minimum of Dfl. 225.00. will then have to be paid.