Capital gains tax in New Mexico
An effective 4.78%, on top of $15,000 of federal tax
- Effective state rate
- 4.78%
- Federal tax on the same gain
- $15,000
- Total, federal and state
- $19,778
- Rank among the 51 jurisdictions
- 32 of 51, cheapest first
The rule in New Mexico
New Mexico excludes the first $2,500 of a long-term capital gain and taxes the rest as ordinary income, an effective 4.78% here.
- From tax year 2024 New Mexico's deduction is the greater of the net capital gain up to $2,500, or 40% of up to $1,000,000 of gain from the sale of a New Mexico business. The $2,500 branch is applied here; the business-sale branch is not, because whether a sale qualifies cannot be told from a gain figure.
- The older 40%-of-any-gain deduction that many summaries still quote was repealed for tax years beginning on or after 1 January 2024.
- Married filing separately: each spouse may claim only half the deduction.
Tax year 2026, from New Mexico Statutes § 7-2-34, as amended by 2023 HB 547 §10.
Work out the tax on your own gain
Prefilled for New Mexico. Change what you paid, what you sold for and your other income — the federal band a gain lands in depends on everything underneath it, which is why the income field matters.
More than one year is long-term and gets the lower rates. Exactly one year is short-term — the clock starts the day after you bought.
Wages, self-employment, interest — everything but this gain. It decides which capital gains bracket the gain lands in.
Adds that state's own treatment of the gain, which is not always its income tax rate.
- You keep
- $80,222.50The gain after every tax below.
- Capital gain
- $100,000.00
- Federal capital gains tax
- $15,000.00
- Federal rate on the last dollar
- 15%
- Net investment income tax
- $0.00The 3.8% surtax on investment income above $200,000 single or $250,000 joint.
- State tax on the gain
- $4,777.50
- Effective rate on the gain
- 19.78%
Assumptions
- One sale of a straightforward capital asset — shares, funds, crypto or investment property — by an individual US resident.
- The gain is stacked on your other taxable income, which is what decides the federal band.
- No main-home exclusion, depreciation recapture, collectibles rate, qualified small business stock, opportunity zone or 1031 exchange.
- State tax uses that state's rule for a gain allocated to it; a gain sourced to another state, or a part-year move, is not modelled.
- No local income tax: county in Maryland and Indiana, municipal in Ohio and Pennsylvania, city in New York.
| Band | Rate | Gain in this band | Tax |
|---|---|---|---|
| 0% band (to $49,450 of taxable income) | 0% | $0 | $0 |
| 15% band (to $545,500) | 15% | $100,000 | $15,000 |
| 20% band (above $545,500) | 20% | $0 | $0 |
| New Mexico tax on the gain | 4.8% | $100,000 | $4,778 |
| Holding period | Total tax | You keep |
|---|---|---|
| Sold within a year — short-term | $28,464 | $71,536 |
| Held more than a year — long-term | $19,778 | $80,223 |
You have held this more than a year, so the long-term rates apply. The other row is what the same sale would have cost inside a year.
What a long-term gain costs in New Mexico
A single filer with $100,000 of other income, selling an asset held more than a year, in the 2026 tax year. Federal tax is the 0/15/20% schedule; the surtax column is the 3.8% net investment income tax.
| Gain | Federal | 3.8% surtax | New Mexico | Total tax | You keep |
|---|---|---|---|---|---|
| $10,000 | $1,500 | — | $368 | $1,868 | $8,133 |
| $50,000 | $7,500 | — | $2,328 | $9,828 | $40,173 |
| $100,000 | $15,000 | — | $4,778 | $19,778 | $80,223 |
| $250,000 | $37,500 | $5,700 | $13,341 | $56,542 | $193,459 |
| $500,000 | $76,920 | $15,200 | $28,092 | $120,212 | $379,789 |
| $1,000,000 | $176,920 | $34,200 | $57,592 | $268,712 | $731,289 |
How New Mexico compares
State tax on the same $100,000 gain. New Mexico ranks 32 of 51 jurisdictions, cheapest first.
| State | State tax on $100,000 |
|---|---|
| Oklahoma | $4,750 |
| Rhode Island | $4,750 |
| New Mexico | $4,778 |
| Illinois | $4,950 |
| Georgia | $4,990 |
Frequently asked questions
Does New Mexico tax capital gains?
New Mexico excludes the first $2,500 of a long-term capital gain and taxes the rest as ordinary income, an effective 4.78% here.
How much is capital gains tax in New Mexico?
On a $100,000 long-term gain for someone earning $100,000, New Mexico takes $4,778 — an effective 4.78%. Federal tax adds $15,000, for $19,778 in all.
Is short-term capital gain taxed differently in New Mexico?
Yes. New Mexico's relief applies to long-term gain only; a short-term gain is taxed in full as ordinary income.
How long do I have to hold something for the lower rate?
More than one year, federally. The holding period starts the day after you acquire the asset, so something bought on 10 March is long-term only if sold on 11 March the following year or later. Inside a year the gain is ordinary income at your income tax bracket, which for most people is 22% or 24% rather than 15%.
Do I pay New Mexico tax on a gain if I moved away before selling?
Generally you are taxed by the state you were resident in when the gain was realised, and some states also tax gains sourced to property inside them however long you have been gone. A part-year move usually means allocating the gain between the two states. This page assumes a full-year New Mexico resident.
Related
Put this calculator on your own site
A working capital gains calculator prefilled for New Mexico, free for any site, with no ads and no sign-up. It stays current as the rates here are updated.
Paste this anywhere. It works on any site, carries no ads, never expires, and always shows the current version.
New Mexico Capital Gains Tax Calculator by CalculateItNow
The page's own title. The clearest description of what the link leads to.
The credit line sits outside the widget on purpose, so it is a real link on your page rather than one buried in a frame. Please keep it — it is what pays for CalculateItNow staying free and ad-free. The script only resizes the widget to fit its contents; drop it and the widget still works.
Capital gains tax in New Mexico: New Mexico excludes the first $2,500 of a long-term capital gain and taxes the rest as ordinary income, an effective 4.78% here. Source: https://www.calculateitnow.dev/new-mexico-capital-gains-tax