New Mexico estimated tax due dates for 2026
New Mexico estimated income tax payments for tax year 2026 are due April 15, 2026, June 15, 2026, September 15, 2026, January 15, 2027. That matches the federal schedule. Below: who has to pay, how to avoid an underpayment penalty and where to pay, with the official source.
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| 1 | |
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Federal 2026 estimated tax due dates, for comparison: April 15, 2026, June 15, 2026, September 15, 2026, January 15, 2027.
Who must pay New Mexico estimated tax?
Every individual who must file a New Mexico personal income tax return must pay estimated tax under Section 7-2-12.2 NMSA 1978. If the difference between the tax shown on the return and the total of estimated tax payments and withholding tax paid is more than $1,000 the Taxation and Revenue Department determines whether the required annual payment was made and computes an underpayment penalty.
How do you avoid a New Mexico underpayment penalty?
Required annual payment is the lesser of 90% of the tax on the current year's return (or 90% of the year's tax if no return is filed) or 100% of the tax on the prior year's return (if a full 12-month New Mexico return was filed for the prior year). No 110% rule. Underpayment penalty is only computed when tax on the return exceeds estimates plus withholding by more than $1,000.
How much should you pay?
Start with your federal estimate: the free Quarterly Estimated Tax Calculator works out your 2026 federal payments and safe harbor. New Mexico figures its own tax, so the state amount is separate.
