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New Mexico business tax extension

New Mexico honors the federal extension for Form CIT-1, and has its own extension form for a business without one. The federal extension is Form 7004, due for calendar-year corporations and for partnerships and S corporations. In general, an extension gives you more time to file, not more time to pay.

Last updated · From New Mexico's own forms, instructions and laws, cited below

Does New Mexico accept the federal extension?

A federal extension (Form 7004) also extends the New Mexico return. Without a federal extension, file Form RPD-41096, Application for Extension of Time to File.

New Mexico's rules for each business return, as its own instructions and laws state them:

Corporations

Return
Form CIT-1, New Mexico Corporate Income and Franchise Tax Return
Due date
The federal due date of Form 1120 Calendar-year 2026 returns:
Extension
A federal extension (Form 7004) also extends the New Mexico return. Without a federal extension, file Form RPD-41096, Application for Extension of Time to File. Attach a copy of the federal extension to the CIT-1. Without a federal extension, or for more time than it gives, file Form RPD-41096 (or a letter) by the due date of the return.
Extended due date
The federal extended due date of Form 1120 Calendar-year 2026 returns:
Payment
An extension does not extend the time to pay: interest runs from the original due date. The late-payment penalty does not apply if the tax is paid by the extended due date. To pay with the extension: Form CIT-EXT, Corporate Income and Franchise Tax Extension Payment Voucher, or online through TAP.

S corporations

Return
Form S-Corp, Sub-Chapter S Corporate Income and Franchise Tax Return
Due date
The federal due date of Form 1120-S Calendar-year 2026 returns:
Extension
A federal extension (Form 7004) also extends the New Mexico return. Without a federal extension, file Form RPD-41096, Application for Extension of Time to File. Attach a copy of the federal extension to the S-Corp return. Without a federal extension, or for more time than it gives, file Form RPD-41096 (or a letter) by the due date of the return.
Extended due date
The federal extended due date of Form 1120-S Calendar-year 2026 returns:
Payment
An extension does not extend the time to pay: interest runs from the original due date. The late-payment penalty does not apply if the tax is paid by the extended due date. To pay with the extension: Form S-Corp-EXT, Extension Payment Voucher.

Partnerships

Return
Form PTE, New Mexico Pass-Through Entities Tax Return
Due date
The federal due date of Form 1065 Calendar-year 2026 returns:
Extension
A federal extension (Form 7004) also extends the New Mexico return. Without a federal extension, file Form RPD-41096, Application for Extension of Time to File. Attach a copy of the federal extension to the PTE return. Without a federal extension, or for more time than it gives, file Form RPD-41096 (or a letter) by the due date of the return.
Extended due date
The federal extended due date of Form 1065 Calendar-year 2026 returns:
Payment
An extension does not extend the time to pay: interest runs from the original due date. The late-payment penalty does not apply if the tax is paid by the extended due date. To pay with the extension: Form PTE-EXT, Pass-Through Entity Extension Payment Voucher.

Estates and trusts

Return
Form FID-1, New Mexico Fiduciary Income Tax Return
Due date
The federal due date of Form 1041 Calendar-year 2026 returns:
Extension
A federal extension (Form 7004) also extends the New Mexico return. Without a federal extension, file Form RPD-41096, Application for Extension of Time to File. Attach a copy of the federal extension to the FID-1. Without a federal extension, or for more time than it gives, file Form RPD-41096 (or a letter) by the due date of the return.
Extended due date
The federal extended due date of Form 1041 Calendar-year 2026 returns:
Payment
An extension does not extend the time to pay: interest runs from the original due date. The late-payment penalty does not apply if the tax is paid by the extended due date. To pay with the extension: Form FID-EXT, Fiduciary Income Tax Extension Payment Voucher, or on the Department's website.

When a due date in New Mexico falls on a weekend or legal holiday, it moves to the next business day.

When is the federal business extension due?

Corporations, S corporations, partnerships, multi-member LLCs, estates and trusts extend their federal return with Form 7004, filed by the return's original due date. The extension is automatic: no reason is needed and the IRS doesn't approve it. We e-file it for a flat $9.95. These are the 2027 dates for calendar-year 2026 returns:

Federal extension deadlines for calendar-year 2026 returns
ReturnFile the extension byExtended to
Form 1065 Partnerships & multi-member LLCs, Form 70046 months
Form 1120-S S corporations (and LLCs taxed as S corps), Form 70046 months
Form 1120 C corporations (and LLCs taxed as C corps), Form 70046 months
Form 1041 Estates & trusts, Form 70045½ months
Form 990, 990-EZ, 990-PF Tax-exempt organizations & private foundations, Form 8868May 15, 2027 is a Saturday6 months

Federal dates follow the IRS rule: a deadline on a weekend or legal holiday moves to the next business day. A fiscal-year business counts from its own year-end; see the fiscal-year deadline guide.

Tax-exempt organizations extend the 990 series with Form 8868, not Form 7004. Each return needs its own extension, so extending a business return does not extend its owners' personal returns.

Does an extension give more time to pay?

No. A federal extension moves the filing deadline only: tax owed is due by the original due date, and the IRS charges interest and the late-payment penalty on anything paid after it. New Mexico's instructions say the same for its returns: a New Mexico extension doesn't move the payment deadline. More in does an extension give you more time to pay?

Where are New Mexico's forms and instructions?

On the New Mexico Taxation and Revenue Department website, which has the current forms, instructions and online services. The rules on this page are summarized from the sources below. We e-file the federal extension; the New Mexico return and any New Mexico extension request go to the state.

New Mexico extension FAQ

Does New Mexico accept the federal business tax extension?

A federal extension (Form 7004) also extends the New Mexico return. Without a federal extension, file Form RPD-41096, Application for Extension of Time to File. Attach a copy of the federal extension to the CIT-1. Without a federal extension, or for more time than it gives, file Form RPD-41096 (or a letter) by the due date of the return.

When is the New Mexico Form CIT-1 due?

The federal due date of Form 1120. For calendar-year 2026 returns, that is Thursday, April 15, 2027.

Does a New Mexico extension give more time to pay?

No. An extension does not extend the time to pay: interest runs from the original due date. The late-payment penalty does not apply if the tax is paid by the extended due date. To pay with the extension: Form CIT-EXT, Corporate Income and Franchise Tax Extension Payment Voucher, or online through TAP.

Does a New Mexico business still need a federal extension?

Yes, to get more time for its federal return: Form 7004, filed by April 15, 2027 for a calendar-year corporation or March 15, 2027 for a partnership or S corporation. New Mexico honors that federal extension for the state return too.

Sources

Filing a federal business extension this season?

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