The tax is calculated on the public tax evaluaiton of your property. Each municipality determines the tax rate itself, but most places charged between 0,1 and 1.5 pro mill. Additionally, you have to pay waste collection fees.
You can choose to pay the taxes in four installments, or pay the total amount within the first April and get 5% discount.
If you need help to pay your taxes, you are welcome to drop me an email