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Receiver of Taxes

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 2025-2026 tax bills are currently being prepared, and no information will be available until the earliest, Monday, December 8, 2025. If you are the property owner and would like to receive email notification as soon as the tax bills become available, please sign up on our Online Payment Portal, https://Tax.IslipNY.gov

Please see the information below regarding the 2024-2025 tax year.

Due Dates:

  • 1st half taxes are due on/before January 10, 2026
  • 2nd half taxes are due on/before May 31, 2026

Office Closed:

  • Thursday, November 27, 2025, in observance of Thanksgiving
  • Friday, November 28, 2025, day after Thanksgiving
  • Wednesday, December 24, 2025, in observance of Christmas Eve
  • Thursday, December 25, 2025, in observance of Christmas Day
  • Wednesday, December 31, 2025, in observance of New Years Eve
  • ***PLEASE NOTE New Years Eve (12/31/25) is no longer a half day
  • Thursday, January 1, 2025, in observance of New Years Day

Special Dates/Hours:

  • Monday, January 12, 2026 – (8:30am – 7:00pm)
  • Monday, June 1, 2026 – (8:30am – 7:00pm)

***THE 2025-2026 TAX BILL WILL BE MAILED TO THE ADDRESS ON FILE ON OR ABOUT DECEMBER 8, 2025*** You will not receive a bill in December if your property taxes are escrowed through your financial institution.

  • 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.

*Taxes become a lien on December 1st of each year*