New Mexico · reference

New Mexico calendar and forms: dates, schedules, TAP and where to check a refund

Every New Mexico date that matters for the 2026 return, from the last estimated payment in January 2027 to the extended due date in October, and a plain-English guide to Form PIT-1 and the schedules that attach to it. Also how to file free on the Department’s own system, how to pay without a fee, and how long a refund takes. For anyone who files here.

By Charles Trautman, EA, editor

Need to Know Tax · written from New Mexico Taxation and Revenue Department sources, November 3, 2026; updated November 12, 2026 after the election · not yet reviewed by a New Mexico practitioner

New Mexico runs on the federal calendar. The PIT-1 is due Thursday, April 15, 2027, the same day as the Form 1040, and since HB 218 (2025) that date applies to paper and electronic filers alike; the old end-of-April grace for people who e-filed and paid electronically is gone. The four estimated payments fall on the federal dates. A federal extension is honored automatically, to October 15, 2027, with nothing to send the state. The one rule to keep in front of you is that the extension is to file, not to pay: interest runs from April 15 on anything unpaid, extension or not.

The form side is a single return, PIT-1, with schedules that attach only when they apply. Because New Mexico starts from federal AGI and borrows the federal deduction, most filers touch two pages: the PIT-1 itself, and Schedule PIT-ADJ for the Social Security exemption, the age-65 exemption, the 529 deduction or U.S. bond interest. Families with the refundable credits add Schedule PIT-RC. The rest of the list below is for people who moved, who owe estimated tax, or who need to fix a return already filed.

The 2027 filing season, dated

New Mexico dates for the 2026 return and 2027 payments
Date	What happens	Form
Friday, January 15, 2027	Fourth and final 2026 estimated payment due. Skipped without penalty if the 2026 return is filed and paid in full by January 31, which falls on a Sunday, so Monday, February 1. Farmers and ranchers with two-thirds of gross income from farming may instead make one payment today or file and pay in full by March 1.	PIT-ES or TAP
Mid to late January 2027	The Department begins accepting 2026 returns. In 2026 it opened its own system, TAP, on January 16 and began taking federally linked returns on January 26, when the IRS opened.	PIT-1
Monday, February 1, 2027	Employers must furnish W-2s; January 31 is a Sunday.	W-2
Thursday, April 15, 2027	PIT-1 due and all 2026 tax due, paper or electronic. A payment with PIT-EXT today stops interest and late-payment penalty while the return is finished on extension. First 2027 estimated payment due. Last day to file Form RPD-41096 if you need a New Mexico extension without a federal one.	PIT-1, PIT-EXT, PIT-ES, RPD-41096
Tuesday, June 15, 2027	Second 2027 estimated payment due.	PIT-ES
Wednesday, September 15, 2027	Third 2027 estimated payment due.	PIT-ES
Friday, October 15, 2027	Extended due date for the 2026 PIT-1. New Mexico follows the IRS extension rules, so a federal extension carries over with no state request.	PIT-1
Tuesday, January 18, 2028	Fourth 2027 estimated payment due. January 15 is a Saturday and the 17th is a holiday; a postmark on the next business day is timely.	PIT-ES
Property taxes run on the county’s calendar, not the Department’s. Bills are mailed by county treasurers in the fall and paid in two halves, and the valuation freeze for owners 65 or older is applied for at the county assessor early in the year, generally by the end of February (verify; varies by county). The two property tax rebates that are on the income tax return, on Schedule PIT-RC, count tax paid during 2026.

How the extension really works

The Department says it follows IRS rules for extensions. If you filed federal Form 4868, or the IRS gave you an automatic extension for any other reason, New Mexico accepts it: mark box 6a on PIT-1, enter the extended date in 6b, and do not attach a copy. Only someone who needs a New Mexico extension without a federal one, or needs more time than the federal extension gives, files Form RPD-41096, Application for Extension of Time to File, by April 15.

What no extension does is extend the time to pay. Interest runs from April 15 on any unpaid tax, at the federal underpayment rate, and the late-payment penalty is 2% a month up to 20% (verify the penalty rate and whether paying 90% by April 15 avoids it). The fix is the PIT-EXT voucher: estimate the balance, send it by April 15, and report the payment on PIT-1 line 31 as “other payments,” not on the estimated-payment line. A payment on TAP accomplishes the same thing without the voucher.

Estimated payments

Every individual who files a New Mexico return is subject to the estimated tax rules under Section 7-2-12.2, but the penalty only applies when the tax on the return exceeds withholding and estimated payments by $1,000 or more. The required annual payment is the smaller of 90% of this year’s New Mexico tax or 100% of last year’s, the latter only if you filed a full-year New Mexico return for the prior year. The Department’s FYI-320 describes no 110% tier for higher earners (verify). Tax for this purpose is figured after rebates and credits. First-year residents are exempt for their first year. An annualized-income method is available for people whose income arrives unevenly, and a lump sum by April 15 of the tax year counts in place of four installments.

The penalty is interest, not a flat charge: the shortfall for each installment, times the daily federal underpayment rate, times the days late, figured on Form RPD-41272 and attached to the PIT-1. The people most often caught are retirees whose pension payer withheld nothing for New Mexico, anyone with a large Roth conversion or an inherited IRA distribution, and the self-employed, who also owe gross receipts tax on their New Mexico receipts and should not confuse the two.

The forms, in the order a filer meets them

New Mexico personal income tax forms, tax year 2026
Form	What it does	Who needs it
PIT-1	The return. Federal AGI on line 9, the state income tax add-back on line 10, the federal standard or itemized deduction on line 12, the $4,000 dependent deduction on 13, the low- and middle-income exemption on 14, PIT-ADJ totals on 11 and 15, taxable income on 17, tax on 18. Credits, the Working Families Tax Credit on line 25, withholding and payments follow. The same form serves residents, part-year residents and nonresidents.	Everyone who files in New Mexico
Schedule PIT-ADJ	Additions, deductions and exemptions. Additions: other states’ tax-exempt bond interest, a federal NOL carryover, refunded 529 contributions. Deductions and exemptions: U.S. government interest, the age-65-or-blind exemption, 529 contributions to a New Mexico plan, the net capital gain deduction, active-duty pay, the age-65 medical expense exemption, armed forces retirement pay, Social Security, and the public school teacher supplies deduction.	Anyone with Social Security, military pay or retirement, Treasury interest, a 529 deposit, a capital gain, or who is 65 or older with low income
Schedule PIT-RC	Rebates and refundable credits: the Child Income Tax Credit, the Low Income Comprehensive Tax Rebate, the Child Day Care Credit, the $2,800 medical care credit for taxpayers 65 or older, the property tax rebates, and the special-needs adopted child credit. The total goes to PIT-1 line 24. The Working Families Tax Credit is not here; it is on PIT-1 line 25 directly.	Families, low-income households and seniors claiming any refundable credit
Schedule PIT-B	Allocation and apportionment of income. Splits each kind of income between New Mexico and elsewhere, and figures the tax on the New Mexico share; the result replaces PIT-1 line 18.	Anyone who moved in or out during 2026, and nonresidents with New Mexico-source income
Schedule PIT-CR	Business-related credits: rural health practitioner, film, angel investment and the rest. From the 2027 return, the $10,000 physician credit and the local journalism credits enacted by SB 151.	Owners and professionals with a certified business credit
PIT-ES	Estimated payment voucher. Payments can be made on TAP without it.	Anyone expecting to owe $1,000 or more after withholding
PIT-EXT	Extension payment voucher. Sends money by April 15 so interest and penalty do not run while the return is finished on extension. Not an extension request.	Anyone filing after April 15 who expects to owe
RPD-41096	Application for Extension of Time to File. Needed only when there is no federal extension, or more time than the federal extension is needed.	The few filers without a federal extension
PIT-X	Amended return. Also the form for reporting a federal audit change to New Mexico.	Anyone correcting a filed return
RPD-41272	Calculation of the estimated tax underpayment penalty, attached to PIT-1 when the annualized method or a special calculation is used; described in FYI-320.	Anyone who underpaid estimated tax and wants to compute the penalty rather than let the Department bill it
Two more that come up: PIT-D, for voluntary contributions out of a refund, and Form RPD-41083 to claim a refund due a deceased taxpayer. Form PIT-EZ, the short form through 2025, is to be confirmed for 2026 (verify). New Mexico has no withholding certificate of its own; employers use the federal W-4 marked “For New Mexico Withholding Tax Only,” and an employee who wants more state tax withheld asks for a flat additional amount per paycheck. All current forms are on the Department’s Personal Income Tax Forms page.

Filing free, paying, and checking a refund

The Department’s own system is the Taxpayer Access Point, TAP, at tap.state.nm.us. Any resident who has filed a New Mexico return before can file the PIT-1 there free, pay by electronic check at no charge, check a refund without registering, respond to a Department letter, and set up a payment plan. Card payments go through a processor that charges a convenience fee. The one group TAP turns away is first-year filers: the system needs a prior New Mexico return on file, so someone filing here for the first time uses commercial software or paper. TAP files the state return only; the federal return is filed separately.

New Mexico was an IRS Direct File state for the 2025 season. The IRS did not offer Direct File for the 2026 season and has since ended the program, so there is no Direct File for 2027 (verify). Most New Mexico returns are filed through commercial software linked to the federal return, and the state refund arrives separately from the federal one.

The Department says an e-filed refund return generally takes six to eight weeks and a paper return eight to twelve (verify; the 2025 packet gives two different ranges). An identity-verification letter, which the Department sends when something on a return does not match its records, adds six to eight weeks; answer it promptly on TAP. No interest is paid on a refund issued within 55 days. Filing early is the Department’s own advice, as much to get ahead of a fraudulent return in your name as for the refund.

Worked example: filing late with a balance due

A self-employed filer in Las Cruces expects to owe $3,200 of New Mexico tax for 2026 but will not have the books closed by April 15, 2027. She has a federal extension. Two paths.

	Pays $3,200 with PIT-EXT in April	Pays nothing until October
Paid April 15, 2027	$3,200	$0
Return filed	October 1, 2027	October 1, 2027
Late-filing penalty	None: filed within the extension	None: filed within the extension
Late-payment penalty, 2% a month on $3,200 for six months (verify rate)	$0	$384
Interest at the federal rate, about 7% a year for 5½ months (verify rate)	$0	about $103
Cost of waiting	$0	about $487

The extension removed the late-filing penalty in both columns. It removed nothing else. Six months of penalty and interest on $3,200 is about 15% of the balance, far more than any savings account would have paid on the money.

Reaching the Department

The Taxation and Revenue Department’s call center is 1-866-285-2996. Forms are at tax.newmexico.gov, at the Department’s district offices, and in most public libraries during the season. Documents and replies to letters go through TAP, which keeps a record. A notice from the Department should be answered by the date on it even if you disagree.

Behind the scenes: the April 30 date that went away

For years New Mexico rewarded electronic filing with time: anyone who both filed and paid electronically had until April 30 instead of April 15. By 2025 most returns were electronic anyway, so the incentive was doing little except creating two deadlines, and the Department asked the legislature to remove it. HB 218 did, effective June 20, 2025. The 2025 return filed this spring was the first under the single date. If your software or your memory still says “April 30 if you e-file,” it is a year out of date.

What to bring

Your federal extension confirmation, if you have one; New Mexico accepts it without a copy
Estimated payment confirmations from TAP or canceled checks, with dates, for all four 2026 installments
Last year’s PIT-1, which sets the 100% prior-year safe harbor
Every W-2 and 1099 showing New Mexico withholding
If you moved during 2026: the move date and income by period, for Schedule PIT-B
Any letter from the Department, especially an identity-verification request
Bank routing and account numbers for direct deposit

Questions people ask

I e-file. Don’t I get until April 30?

Not anymore. HB 218 (2025) repealed the later date for electronic filers. The 2026 return is due April 15, 2027 for everyone, and so is the payment.

Do I need to file anything with New Mexico to get an extension?

Not if you have a federal extension. Mark box 6a on the PIT-1, enter the date, and file by October 15. If you have no federal extension, file Form RPD-41096 by April 15. Either way, pay what you expect to owe by April 15 with PIT-EXT or on TAP, because interest runs from that date regardless.

Can I file my New Mexico return free?

Yes, on TAP, if you have filed a New Mexico return before. First-year filers cannot use TAP for their first return and need software or paper. TAP does not file the federal return.

How long will my refund take?

The Department’s general figures are six to eight weeks for an e-filed return and eight to twelve for paper, longer if you receive an identity-verification letter. Check status on TAP; no account is needed.

Do I have to make estimated payments on my pension?

If your New Mexico tax after withholding will be $1,000 or more, yes, unless withholding covers 90% of this year’s tax or 100% of last year’s. Many pension payers do not withhold New Mexico tax unless asked. The alternative is to ask the payer to start.

I forgot a 529 deduction on last year’s return. How do I fix it?

File Form PIT-X, an amended return, with a corrected Schedule PIT-ADJ. The deduction for contributions to The Education Plan or Scholar’s Edge has no dollar cap, so it is worth amending for.

One date, April 15; one system, TAP

Pay what you expect to owe by April 15 whether or not the return is done, and keep every TAP confirmation.

Written by Charles Trautman, EA, editor  ·  Need to Know Tax, Lone Tree, Colorado
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Forms and official pages named in this article

Sources and where to check

Updated November 12, 2026, after the November 3 election · tax year 2026 figures · awaiting review by a New Mexico practitioner — use the right article