New Mexico Capital Gains Tax Rate (2026)
New Mexico capital gains tax overview
Six brackets from 1.5% to 5.9%. No special capital gains treatment.
Federal + New Mexico combined rates
Your total capital gains tax bill includes both layers — federal and state. Here is what a New Mexico investor pays in 2026 for long-term gains:
| Federal Long-Term Rate | New Mexico State Rate | Combined Rate | Plus NIIT (if applicable) |
|---|---|---|---|
| 0% | 5.90% | 5.90% | 9.7% |
| 15% | 5.90% | 20.9% | 24.7% |
| 20% | 5.90% | 25.9% | 29.7% |
The NIIT (Net Investment Income Tax) adds an extra 3.8% for taxpayers whose MAGI exceeds $200,000 (single) or $250,000 (married filing jointly). It is a federal tax only — New Mexico does not have an equivalent.
How New Mexico compares to other states
New Mexico's top rate of 5.90% places it in the lower-middle tier of state capital gains taxation. For comparison:
- Zero-tax states (FL, TX, NV, etc.): 0% — total with 15% federal = 15%
- Low-rate states (AZ, IN, PA): 2.5–3.1% — total with 15% federal = 17.5–18.1%
- New Mexico: 5.90% — total with 15% federal = 20.9%
- High-rate states (NY, NJ): 10.75–10.9% — total with 15% federal = ~26%
- California: 13.3% — total with 15% federal = 28.3%
Tax-reduction strategies for New Mexico residents
With a top state rate of 5.90%, minimizing capital gains tax is particularly important in New Mexico. Key strategies:
- Hold over 1 year for long-term federal rates (0/15/20%). New Mexico does not offer a preferential state rate, but federal savings alone are often 7–17%.
- Tax-loss harvesting: Offset your gains with losses realized in the same year. A $20,000 loss offsets $20,000 of gains dollar-for-dollar, saving up to 26% ($5,180) on that $20,000 at top rates.
- 0% bracket planning: In lower-income years (retirement, sabbatical, between jobs), realize gains at the federal 0% rate. You still owe New Mexico state tax, but eliminating the federal component is significant.
- Donate appreciated stock directly to charity or a donor-advised fund to avoid capital gains tax entirely while generating a charitable deduction for the full fair market value.
- Installment sales: If selling a business or real estate, structuring as an installment sale spreads the gain over multiple years, potentially keeping each year's gain in a lower bracket.
Detailed New Mexico capital gains tax rules
Tax history and legal basis
New Mexico taxes capital gains as ordinary income. However, the state offers a significant deduction for long-term gains.
Exemptions and special treatment
New Mexico allows a deduction of up to 40% of net long-term capital gains (or $1,000, whichever is greater) on the state return. This effectively reduces the tax rate on long-term gains by 40%. For a taxpayer in the top 4.9% bracket, the effective rate on long-term gains is approximately 2.94%.
Filing requirements
File Form PIT-1 (resident). New Mexico starts with federal AGI and allows the capital gains deduction on Schedule PIT-ADJ. Estimated payments required if owing $1,000+. Filing deadline is April 15.
Recent changes and legislative updates
New Mexico's 40% capital gains deduction makes it one of the more favorable states for long-term investors. Combined with a moderate top rate of 5.9%, the effective rate on long-term gains is under 3%. The state actively markets this benefit to attract relocating investors.
Worked example: $50,000 capital gain in New Mexico
Here's exactly what a New Mexico resident would owe on a $50,000 long-term capital gain with $80,000 in other income (single filer, 2026):
| Component | Amount | Notes |
|---|---|---|
| Capital gain | $50,000 | Long-term (held over 1 year) |
| Federal tax (15%) | −$7,500 | Based on $80,000 ordinary income + gain |
| New Mexico state tax (2.94%) | −$1,470 | Applied to the full gain amount |
| Total tax owed | −$8,970 | Federal + state combined |
| You keep | $41,030 | 82.1% of your gain |
After both federal and New Mexico state tax, you keep $41,030 of your original $50,000 gain. The effective combined rate is 17.9%. This is well below the national average, making New Mexico one of the more tax-friendly states for investors.
Frequently asked questions — New Mexico
Does New Mexico tax short-term and long-term gains differently?
No — New Mexico taxes both short-term and long-term capital gains as ordinary income at the same rates as wages. There is no state-level preferential rate for patience. The federal system, however, taxes long-term gains at 0/15/20% vs. up to 37% for short-term — a significant difference that applies regardless of state.
Do I need to file a New Mexico tax return if I only have capital gains?
If you have capital gains income and meet New Mexico's filing threshold, you are required to file a New Mexico state income tax return. The threshold is typically similar to the standard deduction amount — check the NM Department of Revenue for the current year's filing requirements.
What if I moved to New Mexico mid-year?
If you moved to New Mexico during the year, you are a part-year resident. New Mexico generally taxes capital gains realized while you were a New Mexico resident. Gains realized before you moved may be taxable by your prior state. Keep detailed records of when each sale occurred relative to your move date.