Does New Mexico Tax Social Security? (w/Examples) + FAQs

This article reflects federal rules and New Mexico rules as of June 2026 and covers tax years 2025 and 2026. Tax law changes — confirm current figures with the New Mexico Taxation and Revenue Department before you file.

Quick Answer

No — most New Mexico retirees do not pay state tax on Social Security. For tax year 2025, benefits are fully exempt if your adjusted gross income is under $100,000 (single), $150,000 (married filing jointly, head of household, or surviving spouse), or $75,000 (married filing separately). Above those lines, benefits are taxed.

What This Means for You Right Now

If you live in New Mexico and rely on Social Security, the money in your monthly check almost certainly stays in your pocket at the state level. Since tax year 2022, New Mexico has exempted Social Security benefits for the large majority of seniors, and the state’s own data shows the break saved middle- and lower-income seniors about $84 million in its first year. The catch is the income cap: cross it by even a dollar, and every dollar of your taxable Social Security becomes subject to New Mexico income tax, not just the amount over the line.

That single-cliff design is what trips people up at filing time, usually in March or April when a one-time IRA withdrawal or a home sale has pushed their income higher than they expected. The stakes are real — the state estimates the average tax hit for a higher-income filer is over $1,000 a year — and the deadline to file your 2025 New Mexico return is April 15, 2026. This guide walks you through the exact rules, the math, and the moves that keep you under the cap.

Here is what you will learn:

🧮 The exact 2025 and 2026 income caps that decide whether you owe a dime, broken down by filing status.
💵 Fully worked dollar examples showing what a retiree just over the line actually pays.
🏛️ How New Mexico’s rule is completely separate from federal Social Security tax — and the new federal senior deduction that lowers your IRS bill.
🚧 The seven most expensive mistakes that push retirees over the cap by accident.
📋 The form, the line, and the steps to claim your exemption correctly before the April 15, 2026 deadline.

How New Mexico Taxes Social Security: The Core Rule

New Mexico is one of only nine states that still taxes Social Security benefits at all, alongside Colorado, Connecticut, Minnesota, Montana, Rhode Island, Utah, Vermont, and West Virginia, according to Bankrate’s 2025 review. But “taxes” is misleading here, because New Mexico exempts benefits for the vast majority of residents through an income-based exemption signed into law by Governor Michelle Lujan Grisham.

The rule works as a full exemption below a hard income cap. If your adjusted gross income (AGI) — the income figure at the bottom of the front page of your federal return — falls under your filing status threshold, you subtract 100% of your taxable Social Security benefits from your New Mexico taxable income. The New Mexico Taxation and Revenue Department confirms the caps: under $100,000 for single filers, under $150,000 for joint filers, heads of household, and surviving spouses, and under $75,000 for married couples filing separately.

The consequence of crossing the cap is harsh because there is no phase-out. Once your AGI hits the threshold, the exemption disappears and your federally taxable Social Security flows straight into your New Mexico income, where it is taxed at the state’s graduated rates of 1.5% to 5.9%. New Mexico is not a “your benefits are partly taxed” state for those over the line — it is all or nothing.

A common misconception is that the cap looks at your Social Security income alone. It does not. The test uses your total AGI, which includes pensions, IRA and 401(k) withdrawals, wages, interest, dividends, and capital gains. A retiree with a $20,000 Social Security benefit and an $85,000 pension is a single filer over the $100,000 line, even though Social Security is a small slice of the total.

What you should do about it: pull your most recent federal Form 1040, find your AGI on the front page, and compare it to your filing-status cap before you assume you owe nothing. If you are within a few thousand dollars of the line, this article’s planning section is for you.

Federal vs. New Mexico: Two Completely Separate Questions

The single biggest source of confusion is mixing up the IRS rules with the state rules. They are independent tests, and you can owe one and not the other. Here is how they line up.

New Mexico State Tax on Social Security	Federal (IRS) Tax on Social Security
Full exemption below AGI caps of $100K single / $150K joint / $75K MFS for tax year 2025, per the state Taxation and Revenue Dept.	Up to 85% of benefits taxable based on “combined income,” per AARP’s New Mexico guide
Uses adjusted gross income (AGI) as the test	Uses “combined income” = AGI + nontaxable interest + 50% of benefits
All-or-nothing: cross the cap and benefits become fully taxable	Tiered: 0%, up to 50%, then up to 85% taxable as income rises
State rate of 1.5%–5.9% applies to taxed benefits	Federal bracket rate applies to taxed benefits

On the federal side, the IRS taxes up to 85% of your benefits once your combined income passes $25,000 (single) or $32,000 (married filing jointly), as AARP explains. “Combined income” is a special IRS formula: your AGI, plus any tax-exempt interest, plus half of your annual Social Security benefits. This federal tax exists no matter which state you live in, so even a fully state-exempt New Mexico retiree can still owe the IRS.

The practical takeaway is that “Does New Mexico tax my Social Security?” and “Does the IRS tax my Social Security?” are two checkboxes. Many New Mexico seniors land on “No” for the state and “Yes, partly” for the IRS. You handle the federal piece on your Form 1040 and the state piece on your New Mexico return.

The New Federal Senior Deduction (OBBBA): What It Changes for 2025–2028

A major 2025 federal law, the One Big Beautiful Bill Act (OBBBA), created a temporary “senior deduction” that lowers federal tax for many older Americans, including New Mexicans. It does not change New Mexico’s state rule at all, but it matters for your overall tax picture, so it belongs here.

The deduction is worth up to $6,000 per qualifying person age 65 or older, or up to $12,000 for a married couple where both spouses are 65+, according to Thomson Reuters’ breakdown. It applies to tax years 2025 through 2028 only and then expires. You can claim it whether you take the standard deduction or itemize, and you claim it on the new federal Schedule 1-A, per TurboTax’s guide.

There is an income phase-out. The full deduction is available if your modified adjusted gross income (MAGI) is $75,000 or less (single) or $150,000 or less (joint). Above those points it shrinks by 6 cents per dollar of excess income and disappears entirely at $175,000 (single) or $250,000 (joint), as H&R Block details. Married couples filing separately cannot claim it.

A common misconception is that this deduction “ends federal tax on Social Security.” It does not. As Thomson Reuters notes, it reduces your taxable income, which can wipe out the tax for many seniors, but the underlying federal rule taxing benefits still exists. What you should do: if you turned 65 by December 31 of the tax year and have a valid Social Security number, make sure your preparer or software claims the deduction on Schedule 1-A — missing it leaves money on the table for a benefit that vanishes after 2028.

Which Situation Applies to You?

Your answer depends on your income and filing status. Find the row that fits, then read the section it points to.

Single, AGI under $100,000 (2025): Your benefits are fully exempt from New Mexico tax. Confirm with the worked example below and claim the exemption on your state return.
Married filing jointly, AGI under $150,000 (2025): Fully exempt at the state level. Watch capital gains and IRA withdrawals that could push you over.
Single, AGI at or over $100,000, or joint at or over $150,000: Your benefits are taxable in New Mexico. See the “over the cap” example and the planning section.
Married filing separately, AGI $75,000 or more: Your benefits are taxable; this status has the lowest cap, so reconsider whether separate filing helps you.
Not yet retired, planning ahead: Read the deadlines and “what to do next” sections so you can manage income year to year and stay under the cap.

Worked Examples With Real Dollars

Numbers make this concrete. These examples use 2025 figures and round for clarity. Your actual tax depends on all your income, deductions, and credits, so treat these as illustrations, not a substitute for your own return.

Example 1 — Single retiree, comfortably exempt. Maria is 68, files single, and lives in Albuquerque. She receives $24,000 in Social Security and withdraws $40,000 from her IRA, for an AGI of roughly $64,000. Because $64,000 is under the $100,000 single cap, New Mexico exempts 100% of her taxable Social Security. Her state tax is calculated only on her non-Social-Security income, and her benefits add nothing to her New Mexico bill.

Example 2 — Joint couple, just under the line. Robert and Susan, both 70, file jointly in Santa Fe. They have $48,000 in combined Social Security and $98,000 from pensions and IRA withdrawals, for an AGI near $146,000. Because $146,000 is under the $150,000 joint cap, their Social Security is fully exempt in New Mexico. One extra $5,000 IRA withdrawal, though, would push them to $151,000 and make their benefits taxable — a planning trap worth watching.

Example 3 — Single retiree over the cap. David, 72, files single in Las Cruces with $30,000 in Social Security and $80,000 in pension and investment income, for an AGI of about $110,000. He is over the $100,000 cap, so his federally taxable Social Security (assume $25,500, or 85% of his benefit) is now taxable in New Mexico. At a marginal state rate near 4.9%, that adds roughly $1,250 to his New Mexico tax bill — close to the state’s own estimate of about $1,182 in extra liability for higher-income filers, per the 2026 legislative analysis.

The lesson from Example 3 is the cliff effect. David did not owe a little because he was a little over — he owed on the full taxable amount because the exemption is all-or-nothing. Trimming his AGI by $10,001 would have erased the entire state tax on his benefits.

Common Scenarios and Their Outcomes

These three scenarios are the ones New Mexico retirees run into most often.

Scenario A: Income hovering near the cap

Your Situation	What Happens at Tax Time
Single retiree whose AGI lands at $99,000 in 2025	Benefits fully exempt; a year-end Roth conversion or large withdrawal that crosses $100,000 would flip you to fully taxable

The fix is timing. Spreading a large IRA withdrawal across two tax years, or doing it in a year your other income is low, can keep you under the cap.

Scenario B: One-time income spike

Your Situation	What Happens at Tax Time
Joint couple sells a rental property, adding $60,000 of capital gain to a normal $120,000 AGI	The spike pushes AGI to $180,000, over the $150,000 cap, so all taxable Social Security becomes taxable that year

A capital gain or large distribution is the most common reason an otherwise-exempt couple owes for a single year. Plan the sale’s timing, and explore installment sales where allowed.

Scenario C: Married filing separately

Your Situation	What Happens at Tax Time
Married retiree files separately with $80,000 AGI	The $75,000 MFS cap is exceeded, so benefits are taxable — even though a joint return at the same total income could keep them exempt

Filing separately rarely helps New Mexico retirees because of the low $75,000 cap. Run the numbers both ways before choosing.

How to Claim the New Mexico Exemption: Form and Steps

New Mexico residents report income on Form PIT-1, the New Mexico Personal Income Tax return, filed with the Taxation and Revenue Department. The Social Security exemption is taken as a deduction that reduces the federally taxable Social Security amount carried into your state return, following the year’s PIT-1 instructions.

Your New Mexico taxable income starts with your federal AGI, because the state conforms to the federal starting point. So your first job is the federal return: figure how much of your Social Security the IRS taxes, because that taxable amount is what New Mexico then exempts (if you are under the cap) or taxes (if you are over it).

The step-by-step at filing time is straightforward. First, complete your federal Form 1040 and note your AGI and your taxable Social Security amount. Second, confirm your AGI is under your filing-status cap. Third, on the PIT-1 and its schedules, claim the Social Security deduction for the taxable benefit amount. Fourth, file by the deadline. If you use tax software or a preparer, the exemption is usually applied automatically once you enter your Social Security and confirm New Mexico residency — but verify it appears, because a missed entry means you overpay.

The deadline for your 2025 return is April 15, 2026, the same as the federal date, per AARP. You can get an extension to file through October 15, 2026, but any tax owed is still due April 15. Missing the deadline with a balance due triggers New Mexico penalties and interest on the unpaid amount.

A Look Ahead: New Mexico May Phase Out the Tax Entirely

Lawmakers have moved to expand the exemption so income no longer matters. Under HB 92 from the 2026 session, the exemption would phase up for higher earners — starting at 20% of Social Security income in tax years 2026 and 2027, rising in steps, and reaching a full exemption for all taxpayers regardless of income beginning in tax year 2034.

This is proposed and phased-in law, not a guarantee, and details can change as it moves through the legislature. The official fiscal analysis lays out the schedule: 20% for 2026–2027, 40% for 2028–2029, and continuing upward toward 100% by the mid-2030s. If you are over today’s cap, watch this — a partial break may already apply for the current year.

What you should do: confirm the current-year percentage before you file, since a higher-income filer who assumed “fully taxable” may now get a partial exemption under the new phase-in. Check the state Social Security exemption page for the figure that applies to your filing year.

Other New Mexico Tax Breaks for Retirees

Social Security is not the only break. New Mexico stacks several senior-focused deductions and credits on top, and using them lowers your AGI, which can also help you stay under the Social Security cap.

Residents 65 and older may qualify for a deduction of up to $8,000 on other taxable retirement income such as pensions and IRA withdrawals, with the amount tied to income, per AARP. There is also a property tax “value freeze” for those 65+ with modified gross income up to $44,200, a low-income rebate, and a notable centenarian exemption — if you reach age 100 and are not a dependent, you pay no New Mexico tax on your personal income.

Military retirees get their own break: New Mexico exempts military pension income up to $30,000, and military disability retirement pay is not taxed by the state. What you should do: review the senior and retirement deductions in the PIT-1 instructions, because each one you claim lowers your AGI and protects your Social Security exemption.

Mistakes to Avoid

Each of these errors costs New Mexico retirees real money, usually by triggering tax that planning could have prevented.

Confusing federal and state rules. Assuming the state follows the IRS leads people to either overpay New Mexico or get surprised by a federal bill. The two are separate tests.
Forgetting the cap uses total AGI. Counting only Social Security ignores pensions, IRA withdrawals, and gains, which is what actually pushes filers over the line.
Crossing the cap by a few dollars. Because there is no phase-out, a $1 overage taxes the entire benefit, sometimes adding over $1,000 in state tax.
Taking a large IRA withdrawal in a high-income year. Bunching withdrawals or a Roth conversion into one year can blow past the cap; spreading them out avoids it.
Selling property without timing the gain. A one-time capital gain can push an exempt couple over $150,000 for that single year, taxing benefits that are normally free.
Filing married separately by default. The $75,000 MFS cap is the lowest, so this status taxes benefits that a joint return would exempt.
Skipping the federal senior deduction. Missing the OBBBA $6,000-per-person deduction on Schedule 1-A overpays the IRS on a benefit that expires after 2028.
Not verifying the exemption appears on your return. Software or a preparer can miss it, so confirm the Social Security deduction shows on your PIT-1.

Do’s and Don’ts

Do’s

Do check your AGI against your cap first, because that single number decides whether you owe New Mexico anything on benefits.
Do plan large withdrawals across tax years, since spreading income keeps you under the all-or-nothing cap.
Do claim every senior deduction you qualify for, because lowering AGI both cuts tax and protects your exemption.
Do handle the federal return before the state one, as your federally taxable benefit is the figure New Mexico then exempts or taxes.
Do confirm the current-year exemption percentage, because a phase-in may now give higher earners a partial break.

Don’ts

Don’t assume New Mexico mirrors the IRS, because the state uses a different test and a different cap.
Don’t ignore a one-time income spike, since a single big gain can tax benefits for the whole year.
Don’t file separately without running the numbers, as the low MFS cap often costs more than it saves.
Don’t wait until April to plan, because income-timing moves must happen before December 31.
Don’t skip professional help on a complex year, since a property sale, business sale, or large conversion can warrant a CPA.

Pros and Cons of New Mexico’s Approach

Pros

Most seniors pay zero state tax on benefits, because the income caps are high enough to cover the majority of retirees.
The rule is simple below the cap, so a clearly-under filer needs no complex calculation.
No estate or inheritance tax in New Mexico, per AARP, which helps retirees overall.
Extra senior and military deductions stack on top, lowering tax for older residents beyond Social Security.
A phase-in toward full exemption may soon help even higher-income retirees.

Cons

The all-or-nothing cliff taxes the entire benefit once you cross the cap, with no gradual phase-out today.
The cap counts all income, so non-Social-Security income can disqualify you.
The low MFS cap of $75,000 penalizes some married filers.
One-time income spikes can tax benefits for an otherwise-exempt year.
New Mexico is still one of only nine states that taxes benefits at all, per Bankrate.

When to Call a Professional

This article is educational and is not a substitute for advice from a licensed professional about your specific situation. Most New Mexico retirees with steady, predictable income can file accurately with good tax software. But certain years call for a CPA or tax advisor — for example, when you sell a home, rental, or business, do a large Roth conversion, have income hovering right at the cap, or face both federal and state taxation of benefits. A professional review for a complex return typically costs a few hundred dollars and often saves more than that by timing income to stay under the cap.

What to Do Next

Take these steps in order before you file your 2025 return by April 15, 2026.

Pull your federal Form 1040 and find your AGI on the front page.
Compare that AGI to your filing-status cap: $100,000 single, $150,000 joint, or $75,000 MFS for tax year 2025.
If you are under, confirm the Social Security exemption is applied on your New Mexico PIT-1.
If you are 65+, make sure the federal OBBBA senior deduction is claimed on Schedule 1-A.
If you are near or over the cap, gather records of any IRA withdrawals, conversions, and capital gains, and consider income-timing or a CPA before year-end.
Check the state exemption page for the current-year percentage in case the phase-in applies to you.

FAQs

Does New Mexico tax Social Security benefits?

No, for most residents. For tax year 2025, benefits are fully exempt if AGI is under $100,000 (single), $150,000 (joint, head of household, surviving spouse), or $75,000 (married filing separately). Above those caps, benefits are taxable.

What is the income limit to avoid New Mexico tax on Social Security?

$100,000 single, $150,000 joint, $75,000 married filing separately for tax year 2025, based on adjusted gross income. Stay under your filing-status cap and 100% of your taxable benefits are exempt.

Does crossing the income cap tax all of my Social Security?

Yes. There is no phase-out today, so exceeding the cap by even one dollar makes your federally taxable Social Security fully taxable in New Mexico at rates from 1.5% to 5.9%.

Is Social Security taxed federally if I live in New Mexico?

Yes, possibly. The IRS can tax up to 85% of benefits once combined income tops $25,000 (single) or $32,000 (joint), regardless of your state. Federal tax is separate from New Mexico’s rule.

What income counts toward the New Mexico cap?

Your total adjusted gross income (AGI). That includes pensions, IRA and 401(k) withdrawals, wages, interest, dividends, and capital gains — not just Social Security benefits.

What is the federal senior deduction for 2025?

Up to $6,000 per person age 65+ ($12,000 if both spouses qualify), available for tax years 2025–2028 and claimed on Schedule 1-A. It phases out above $75,000 single or $150,000 joint MAGI.

Does the federal senior deduction change New Mexico’s rule?

No. The OBBBA senior deduction lowers your federal tax only. New Mexico’s separate AGI-based exemption is unaffected by it.

Will New Mexico stop taxing Social Security entirely?

Possibly, by 2034. Proposed HB 92 would phase in a full exemption for all incomes, starting at 20% in 2026 and rising to 100% by tax year 2034. It is not yet guaranteed.

Are pensions and IRA withdrawals taxed in New Mexico?

Yes, as regular income. But residents 65+ may deduct up to $8,000 of taxable retirement income depending on income, which can also help you stay under the Social Security cap.

What form do I use to claim the exemption?

Form PIT-1, the New Mexico Personal Income Tax return. The Social Security deduction is taken on the PIT-1 and its schedules, following that year’s instructions. The 2025 filing deadline is April 15, 2026.

Does filing married separately help me avoid the tax?

No, usually. The married-filing-separately cap is only $75,000, the lowest of all statuses, so separate filing often taxes benefits a joint return would exempt.

Does New Mexico have an estate or inheritance tax?

No. New Mexico collects neither an estate tax nor an inheritance tax, though income earned from inherited accounts is still taxed as personal income.

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