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

Welcome to the Town of Islip Receiver of Taxes homepage. This site has been completely revamped to give taxpayers a more user-friendly experience when inquiring about property taxes. The “Property Search” and “Copy of Tax Bill” options are still under construction. These are new components to the website, please be patient with us while we finish their build-out.

Please see the information below regarding the 2023-2024 tax year.

Office Closed:

  • Friday, December 22, 2023 in observance of Christmas Eve
  • Monday, December 25, 2023 in observance of Christmas Day
  • Monday, January 1, 2024 in observance of New Year’s Day

Half Day:

  • Friday, December 29, 2023 in observance of New Year’s Eve – (8:30am – 12 noon)

Special Dates/Hours:

  • Wednesday, January 10, 2024 – (8:30am – 7:00pm)
  • Friday, May 31, 2024 – (8:30am – 7:00pm)
The office is closed on Saturday, Sunday and holidays.

***THE 2023-2024 TAX BILL WILL BE MAILED TO THE ADDRESS ON FILE ON OR ABOUT DECEMBER 11, 2023*** You will not receive a bill in December if your property taxes are escrowed through your financial institution.

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

  • After May 31st, any taxes plus penalty and interest must be paid to the Suffolk County Comptroller’s office, located at 330 Center Drive Riverhead, NY 11901. (631) 852-3000.