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The amount of your instalments is calculated on the basis of consumption in your most recent period. The three quarterly instalments are intended to cover 3/4 of your next adjustment bill. This means that when you receive that bill, only 1/4 of the amount remains to be paid. 

However, if there is a change in your consumption habits (change in household composition, construction of a swimming pool or pond, etc.), you can adjust the amount of your instalments to suit you, avoiding unpleasant surprises.

Yes, water suppliers are legally required to invoice instalments at least quarterly. That's why, each year, you will receive at least three instalment bills and one adjustment bill, from which the instalments you have paid will be deducted. The adjustment bill is calculated based on your water meter reading, which you send us every year. 

In the case of an empty building, the owner is liable for this fee. 

Instalment bills are sent quarterly by default. But if you feel you can manage your budget more easily with smaller amounts, in your Customer Area you can choose to receive them monthly. 

If you opt for monthly instalments, you will automatically receive your SWDE bills and communications digitally (by e-mail, e-mail + text, Zoomit or peppol). 

If the building is uninhabited, you can opt for 'empty house' advance payments.

For quarterly instalments, the amount is fixed at €30.

For monthly instalments, the amount is fixed at €10.