Do I need to file a separate NY S-corporation election?

Yes. Unlike most states, New York requires a separate S-corporation election via Form CT-6 — federal S-corp status (Form 2553) does not automatically apply for NY income tax purposes. Without the CT-6 election, the entity is taxed as a C-corporation for NY franchise tax.

What happens if I file my federal return after April 15?

If you owe tax and file after April 15 without an approved extension, the IRS assesses a failure-to-file penalty (5% of unpaid tax per month, up to 25%) plus a failure-to-pay penalty (0.5% per month) plus interest. If you're due a refund, there's no late-filing penalty — but you have only three years from the original deadline to claim it. CPAs should advise extension filers that an extension extends time to file, never time to pay.

Do state filing deadlines automatically follow federal?

Most states conform to the federal April 15 individual deadline, but conformity varies for corporate, pass-through, and franchise filings. Several states have unique deadlines: Louisiana (May 15), Virginia (May 1), Iowa (May 1 for individual), Delaware (April 30 for individual). Always verify against the state revenue department site — TaxScout links to the authoritative source on every state page.

Are estimated quarterly payments mandatory for CPA-firm clients?

Federally, individuals must pay estimated tax if they expect to owe $1,000 or more after withholding. C-corporations have a $500 threshold. Underpayment triggers Form 2210 / 2220 penalties calculated quarterly. Most CPA firms advise clients to safe-harbor at 100% of prior-year liability (110% for AGI over $150K) to avoid the penalty entirely.

Tax Year 2026 · Filed 2027State-revenue-department verified

New York tax deadlines 2026

Last updated May 13, 2026

New York individual income tax (Form IT-201) conforms to the federal April 15 deadline.
NY has an aggressive Pass-Through Entity Tax (PTET) election with separate election deadlines (March 15 for annual election).
NYC adds a separate city income tax — verify with NYC Department of Finance for filers with NYC residency or income source.

New York individual income tax (Form IT-201)

Filing deadline

April 15, 2027

Extension deadline

October 15, 2027

NY conforms to the federal individual filing deadline. NY State income tax rates range from 4% to 10.9% for high earners. NYC residents owe additional city income tax (3.078%–3.876%).

Quarterly payments

Q1 2026

Jan 1 – Mar 31, 2026

April 15, 2026

Q2 2026

Apr 1 – May 31, 2026

June 15, 2026

Q3 2026

Jun 1 – Aug 31, 2026

September 15, 2026

Q4 2026

Sep 1 – Dec 31, 2026

January 15, 2027

Authoritative source

New York Pass-Through Entity Tax (PTET)

Filing deadline

March 15, 2027

Annual PTET election must be made by March 15. Estimated PTET payments due 3/15, 6/15, 9/15, 12/15. SALT cap workaround — entity pays NY tax federally deductible.

Authoritative source

New York S-corp & partnership (Form CT-3-S / IT-204)

Filing deadline

March 16, 2027

Extension deadline

September 15, 2027

NY S-corps must make a separate NY S-election (Form CT-6) — federal S-corp status does not automatically apply for NY.

Authoritative source

New York City individual income tax

NYC residents file additional Form IT-201 schedule. NYC tax rates: 3.078% on first $12K, ranging to 3.876% on income over $50K (single).

Authoritative source

Federal individual income tax (Form 1040)

Filing deadline

April 15, 2027

Extension deadline

October 15, 2027

Quarterly payments

Q1 2026

Jan 1 – Mar 31, 2026

April 15, 2026

Q2 2026

Apr 1 – May 31, 2026

June 15, 2026

Q3 2026

Jun 1 – Aug 31, 2026

September 15, 2026

Q4 2026

Sep 1 – Dec 31, 2026

January 15, 2027

Authoritative source

Authoritative resources

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TaxScout's tax form library walks through every IRS form CPA firms file for New York clients — who must file, key fields, common mistakes, and step-by-step instructions.

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Frequently Asked Questions

New York-specific and federal questions for tax year 2026.

The NY Pass-Through Entity Tax allows partnerships and S-corps to elect to pay NY income tax at the entity level, providing a federal SALT cap workaround. The annual election must be made by March 15. Estimated PTET payments are due quarterly (March 15, June 15, September 15, December 15). The entity-level PTET payment is deductible on the federal partnership / S-corp return, reducing federal taxable income passed to owners.

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