Do you only moor your boat in your own marina? Then you do not have to pay a harbour fee. Do you also moor your boat in other spots in Amsterdam? For example, next to a restaurant or pub? Then you are required to pay a harbour fee.
Your harbour fee is valid for 1 calendar year, from 1 January to 31 December. Once you have applied for an annual harbour sticker fee, you will automatically receive an annual bill for the renewal of your harbour fee sticker.