IMI payment deadlines depend on the amounts to be paid, as recently highlighted by the Tax and Customs Authority (AT):

  • May: for single instalments for tax equal to or less than 100 euros;
  • May and November: two instalments for IMI above 100 euros and below 500 euros;
  • May, August and November: three instalments for tax equal to or greater than 500 euros.


IMI instalments must be paid by the last day of each month. To do so, simply consult the payment details indicated in the billing note sent by post by AT. This information is also available on the Finance Portal.

And anyone who has to pay an IMI of more than 100 euros can also make the payment in one go.

This information is also available on the Finance Portal, after Login, in the side menu: Payments>Payments in progress.