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 2024-2025 tax collection for this office ended on June 2, 2025. You can no longer make a payment to this office, nor can this office waive a penalty. (Op. NYS Compt. 68-626) For payment instructions, please select this link “Late and Delinquent Taxes”. The 2025-2026 tax year begins on December 1, 2025. No information on the upcoming tax year will be available until early-mid December 2025.
Please see the information below regarding the 2024-2025 tax year.
The 2024-2025 tax collection for this office ended on June 2, 2025. You can no longer make a payment to this office, nor can this office waive a penalty. (Op. NYS Compt. 68-626) For payment instructions, please select this link “Late and Delinquent Taxes”. The 2025-2026 tax year begins on December 1, 2025. No information on the upcoming tax year will be available until early-mid December 2025.
Please see the information below regarding the 2024-2025 tax year.
Due Dates:
- 1st half taxes are due on/before January 10, 2025
- 2nd half taxes are due on/before May 31, 2025
Office Closed:
- Thursday, June 19, 2025 in observance of Juneteenth
- Friday, July 4, 2025 in observance of Independence Day
- Monday, September 1, 2025 in observance of Labor Day
Special Dates/Hours:
- Friday, January 10, 2025 – (8:30am – 7:00pm)
- Monday, June 2, 2025 – (8:30am – 7:00pm)
***THE 2024-2025 TAX BILL WILL BE MAILED TO THE ADDRESS ON FILE ON OR ABOUT DECEMBER 9, 2024*** You will not receive a bill in December if your property taxes are escrowed through your financial institution.
| TAXES SUBMITTED | LATE PENALTY |
|---|---|
| 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.
*Taxes become a lien on December 1st of each year*
