You can rent a licence-free motorboat in Berlin for as little as 125 € per day. Fuel is charged additionally (according to consumption).
Houseboats are usually chartered by the week and cost from 150 € per day. In summer, you can expect to pay an average of 1300 € per week for your holiday on Berlin's waters.
Berlin party boats and ships are rented by the hour and cost between 100 € and 600 € per hour, depending on size and equipment.
Rafts for self-drivers can be chartered from 170 € per day.
Elegant lounge rafts with a skipper will take you across the Spree or the Havel from 100 € per hour.