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Reviewed by: William McLee
Reviewed date:
January 15, 2026

What the New York Form CT-6 (2021) Is For

New York Form CT-6 (2021) is used by a federal S corporation to elect S corporation treatment for New York State tax purposes. Federal S status does not automatically apply at the state level, so a separate election is required for New York to recognize the pass-through treatment. New York Form CT-6 2021 allows the corporation to be treated as a New York S corporation once the election is approved.

After approval, the corporation is treated as a New York S corporation for New York purposes, rather than a C corporation. Income, losses, deductions, and credits generally pass through to shareholders, who report their share on New York personal income tax returns. The election applies to the full 2021 tax year and remains in effect in future years unless terminated. The corporation should keep the approval notice and signed consents with its tax records.

When You’d Use Form CT-6

A corporation would use the New York Form CT-6 2021 when it wants New York State to recognize its federal S corporation status for state tax purposes. The corporation must already be a federal S corporation or have a federal S election pending with the IRS. The CT6 form is typically filed at the start of the tax year in which the corporation wants the election to take effect.

Form CT-6 is also used when the corporation needs to request late election relief after missing the standard deadline. New York may accept a late CT6 form if the corporation can show reasonable cause for the delay. The request should include a clear explanation of what caused the late filing and how the issue was corrected. Approval is not automatic, so the corporation should retain proof of submission and supporting documentation.

Key Rules or Details for 2021

New York Form CT-6 2021 is available only to a federal S corporation (or one with a pending federal S election) that is taxable under Article 9-A. The CT6 form requires unanimous shareholder consent, so every shareholder at the time of the election must sign or provide a valid written consent. Corporations taxable under Article 9 or Article 33 are excluded and cannot make this New York S corporation election.

New York can also treat the election as made under its mandatory rule in some instances. If investment income exceeds 50 percent of federal gross income for 2021, New York may require S corporation filing treatment even without Form CT-6. That rule emphasizes the importance of reviewing income categories before determining how to handle the New York Form CT-6 2021 filing.

Step-by-Step (High Level)

Step 1: Confirm the corporation qualifies

Verify federal S status, Article 9-A eligibility, and that unanimous shareholder consent is available. This prevents rework if the election is not valid under New York rules.

Step 2: Enter corporation information

List the legal name exactly as shown in New York Department of State records. Add the FEIN, mailing address, and tax year information.

Step 3: Provide the election and share details

Enter the effective date of the election and the number of issued and outstanding shares. Confirm these figures match corporate records.

Step 4: Complete shareholder consents and certification

Each shareholder completes ownership details and signs the consent section. An authorized corporate officer then certifies that the form is accurate and complete.

Step 5: Submit and retain proof

Send the completed CT-6 to the New York State Department of Taxation and Finance by fax or mail using the form instructions. Keep copies of the form and any submission proof for records.

Common Mistakes and How to Avoid Them

  • Filing CT-6 before federal S corporation status is approved: Wait until federal S status is confirmed before submitting the New York election to avoid an automatic failure if the federal election is denied.

  • Missing the filing deadline: File by the 15th day of the 3rd month of the tax year (March 15 for calendar-year corporations) so the election applies for that year.

  • Submitting incomplete shareholder consent: Confirm that every required shareholder signs before filing, and review ownership records to ensure that no required signer is missed.

  • Relying on retroactive relief as a fallback: File on time whenever possible and include any required late-election explanation only when a valid basis exists.

  • Using an incorrect legal name: Match the corporation’s legal name exactly to New York Department of State records, including punctuation and corporate designations, before submitting.

What Happens After You File

After the New York Form CT-6 (2021) is submitted, the state reviews the election for eligibility and completeness. The review typically confirms federal S corporation status, Article 9-A coverage, and whether all required consents were included with the CT6 form. If approved, New York issues a notice showing the effective date of S corporation treatment.

Until approval is received, the corporation should continue filing the return type it is otherwise required to file under New York rules. Once approved, the corporation generally files as a New York S corporation for 2021 and later years unless the election is terminated. The corporation should keep the approval notice and signed consents in its records in case questions arise later.

FAQs

Who must file New York Form CT-6 (2021)?

Federal S corporations that are taxable under New York Tax Law Article 9-A and want New York S corporation treatment must file New York Form CT-6 2021. The CT6 form is required even if the corporation already has federal S status.

When was New York Form CT-6 due for 2021?

New York Form CT-6 was generally due by March 15, 2021, for calendar-year corporations. For fiscal-year filers, the deadline was the fifteenth day of the third month of the tax year.

Can a New York Form CT-6 be filed late for the 2021 tax year?

New York allows a late S corporation election if the corporation can demonstrate reasonable cause for missing the deadline. Approval of a late CT6 form is not automatic and depends on state review.

Does New York automatically recognize federal S corporations as such?

New York does not automatically recognize federal S corporation status. A separate state election using New York Form CT-6 is required.

What happens if a shareholder does not consent to the election?

The election is considered invalid if all required shareholders do not consent. New York may grant retroactive relief if the missing consent is corrected and the omission was inadvertent.

How long does the New York S corporation election remain in effect?

The election remains in effect until it is formally terminated or the corporation loses its federal S corporation status. Termination generally requires filing the appropriate New York termination form.

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