VILLAGE PROPERTY TAX & ASSESSMENT INFO.
VILLAGE TAXES (June 1st - May 31st):
2026 Tax bills will be mailed on or before 5/15/2026
Taxes Due: June 1st thru July 1st with no penalty
5% penalty applies after July 1st
1% penalty applies each month thereafter
Public Notice - Tax Sale for Unpaid Taxes 2025-2026 Feb. 12, 2026
GRIEVANCES:
February 10, 2026 - Grievance Day
Grievance day extended and will be accepted until 3/28/206
RP-524 Grievance Application RP-524- Grievance Instructions
ASSESSMENT INFORMATION:
2026-2027 - Final Assessment 4/1/2026
2026-2027 - Tentative Assessment 2/1/2026
2025-2026 - Final Assessment 4/1/2025
2025-2026 - Tentative Assessment 2/3/2025
2024-2025 - Final Assessment 4/1/2024 (1 of 2)
2024-2025 - Final Assessment 4/1/2024 (2 of 2)
2024-2025 - Preliminary Assessment 2/1/2024
2023-2024 - Final Assessment 4/1/2023
2023-2024 - Preliminary Assessment 2/1/2023
TAX EXEMPTION FORMS:
Real Property Tax Exempt. for Capital Improve Residential RP-421f
Volunteer Firefighters/Ambulance Workers Exemption RP-466-C Form - Ocean Beach due 1/13
Volunteer Firefighters/Amburlance Workers Exemption RP-466-C NYS Form
Veterans Exemption RP-458-A Form - Ocean Beach due 1/13
Basic STAR 2025-2026 RP-425B Form
Enhanced STAR 2025-2026 RP-425-E Form - Islip
Enhanced STAR Supplemental RP-425-IVP Form - Islip
Senior Citizens Exemption RP-467 Filer Form - Islip
Senior Citizens Instructions RP-467-I
Senior Citizens Renewal Exemption RP-467-RNW Non-Form - Islip