How to read your water bill

The water bill is based on your water consumption. Your water bill may be an estimated bill or an adjustment bill, depending on when you last reported your water meter reading. You can familiarise yourself with the contents of your water bill by reading these instructions. As of September 2025, HSY’s invoices will no longer include the traditional bank transfer section. You will continue to find all the information you need to pay an invoice on the invoice itself.

What is an estimated bill?

With the estimated bill, we invoice the metered charges of water in accordance with the annual estimate. The annual consumption estimate is calculated on the basis of the water meter readings reported by you and your previous water consumption. An adjustment bill is used to balance the metered charges. You will receive estimated bills that are based on the latest reported reading until you report the water meter reading.

The estimated average water consumption is around 45 cubic metres per person annually. As a new customer, we will invoice you on the basis of this estimate until you report your meter reading to us. We will change the estimate of annual consumption based on the meter reading as necessary.

We will send the estimated bill once a month if the total of the estimated bill exceeds EUR 50 and the water meter reading has not been reported. We will invoice the water consumption once a month in arrears, which means, for example, that the estimated water consumption and basic rates for April will be invoiced in May. 

We recommend reporting the water meter reading regularly  

It is possible to receive more accurate estimated bills by reporting the water meter reading, for example, monthly. At the same time, the property is able to monitor water consumption.

If you want to only receive bills based on the water meter reading, you must read the water meter at the beginning of the month and report the reading by the fourth day of the month. Then, we will only send you bills based on the reading.

If you always record and send the reading of the first day of the month to us, we will send you the adjustment bill once in a calendar month; for example, for a period between 1 March and 31 March. If you do not report your water meter reading to us at the beginning of the month, we will send you an estimated bill in the middle of the month, based on the annual forecast calculated from the readings you have reported earlier.

We will continue to send estimated bills once a month until we receive the following water meter reading from you, after which we can prepare an adjustment bill based on the reading. 

What is an adjustment bill?

We will send you an adjustment bill once you have reported your water meter reading. With the adjustment bill, we will invoice the actual amount of consumed water. Based on this, the payments made through the estimated bills will be deducted from the charged sum. We will either invoice or reimburse you for the difference.

We will send you a bill based on the reading always after receiving the water meter reading from you regardless of the total of the bill. In this way, we can balance your invoicing on the basis of the actual consumption as quickly as possible. If the difference between the estimated bill and actual consumption is small, the sum to be invoiced may also be small.

The adjustment bill is based on the assumption that you have paid all your due bills. If you have not paid all the due bills, you must pay them in addition to the adjustment bill.