Returns are due on or before the 15th day of the fourth month following the close of the fiscal year.
Mandatory first installment (MFI) of estimated tax is due, with Form CT-300, on or before the 15th day of the third month following the close of the fiscal year.
Estimated tax payments are due on or before the 15th day of the sixth, ninth, and twelfth month of the fiscal year.
New York S corporation fiscal-year filers:
Returns are due on or before the 15th day of the third month following the close of the fiscal year.
Mandatory first installment (MFI) is due, with the return or extension, on or before the 15th day of the third month following the close of the fiscal year.
Estimated tax payments are due on or before the 15th day of the sixth, ninth, and twelfth month of the fiscal year.
For S corporations required to make estimated tax payments on behalf of their nonresident shareholders, such estimated tax payments are due on or before April 15, June 16, and September 15 of 2025, and January 15 of 2026.
Personal income tax and fiduciary fiscal-year filers:
Returns are due on or before the 15th day of the fourth month following the close of the fiscal year.
Personal income tax estimated tax payments (and MCTMT if applicable) are due on or before the 15th day of the fourth, sixth, and ninth months of the fiscal year and the first month of the succeeding fiscal year.
Partnershipfiscal-yearfilers:
Returns are due on or before the 15th day of the third month following the close of the fiscal year.
Partnership and LLC estimated tax payments (NYS and MCTMT if applicable) required to be paid on behalf of partners and members that are nonresident individuals or C corporations are due on or before April 15, June 16, and September 15 of 2025, and January 15 of 2026.
The filing fee for partnerships, LLCs and LLPs is due on or before the 15th day of the third month following the close of its tax year.
PTET and NYC PTET fiscal-year filers:
Electing entities must file on a calendar-year basis.
The filing for an electing entity with a fiscal year is due on or before March 15 following the close of the calendar year in which its fiscal year ends.
Special rules apply to sales tax vendors and employers subject to electronic funds transfer requirements. For additional information, see the PrompTax program home page.