New Mexico State Tax Guide
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New Mexico State Tax Guide
New Mexico Key deadlines (tax year 2025, return filed in 2026)
- Filing deadline: Apr 15, 2026
- Extension request deadline: Apr 15, 2026
- Extended return deadline: Oct 15, 2026 (6-month extension)
- Payment deadline: Apr 15, 2026
- Differs from federal: No
To avoid late-payment penalties and interest, you must pay 100% of your predicted New Mexico tax liability by the April 15 deadline
If the due date for filing your return falls on a. Saturday, Sunday, or legal holiday, your return is due by the next regular working day.
October 15, 2026 (6-month extension)
Payment rules
To avoid late-payment penalties and interest, you must pay 100% of your predicted New Mexico tax liability by the April 15 deadline
Payment options
Filing forms
Extension
- RPD-41096 · Download form
New Mexico Refund Tracking
Do I need to file?
If you have an approved Federal tax extension, you do not need to file separate state extension paperwork in April. When you eventually file your final New Mexico return on or before October 15, you must check the extension box on your Form PIT-1. If you file your federal return on time but need extra time specifically for your state return, you must explicitly apply to New Mexico. You must mail New Mexico Form RPD-41096 on or before April 15.
Filing methods
Online filing
You can pay online without needing to mail physical vouchers using Taxpayer Access Point (TAP). You do not need to create an account; simply locate the payments section and select "Make a Payment." Choose Personal Income Tax Extension Payment as your payment type to complete an ACH debit transfer.
Mail filing
By mail with form RPD-41096
