Town Square







A Message from the Supervisor

“Welcome to Islip, the 3rd largest town in New York State, but with an endearing small town feel. We are so proud of our town…our beaches, golf courses, marinas, parks, housing opportunities for all, businesses, industrial parks, healthcare and educational institutions including our own Islip MacArthur Airport that provides many job opportunities. I sincerely hope you find this website helpful.” Angie


To View or Pay Online:

  1. Visit the Payment Website at:

    *Online payment is FOR PROPERTY OWNERS ONLY*

    All 3rd party payees are required to contact our office for payment instructions/assistance.
    Partial payments cannot be accepted when using this service.

  2. Each property owner will register and will be given access to two parcels.  If you own more than two parcels you will email This email address is being protected from spambots. You need JavaScript enabled to view it., or call the Tax Receiver's office at 631-224-5580 during office hours and with proper information, you will be granted access to your additional properties. You will only need to register once.

  3. If you are experiencing any problems or have any questions regarding the use of this site, please refer to the Troubleshooting/FAQ page on the site. This page will resolve most questions and issues that users are experiencing. If you need additional help, during business hours, please call our office at 631.224.5580. If after hours, please email us at This email address is being protected from spambots. You need JavaScript enabled to view it..

Methods of Payment:

    • E-Check: with a convenience fee of $1.00 (not collected by the Town of Islip). Checking accounts ONLY.

    • Credit/Debit Card: American Express not accepted. Convenience fee of 2.09% (not collected by the Town of Islip).


Banking websites which allow the Bill Pay option should caution you that you should not pay your local, state or federal taxes by that method. The process of Bill Pay through a banking site typically sends your payment to a Payment Center and then to a mail-house. This will often result in a late payment. If you choose to use this method you will be responsible for any penalties that may occur if the payment is received late. *This does NOT refer to the Town of Islip Online Tax Payment System.

Please note that not all bank accounts are online compatible.  Accounts such as money market, trust or line of credit etc. may not be compatible with making an online payment.  Please check with your bank or financial institution for details.

December 1st – January 10th No Penalty
After January 10th 1% Penalty
After February 10th 2% Penalty
After March 10th 3% Penalty
After April 10th 4% Penalty
May 11th to May 31st 5% Penalty