How New Mexico capital gains tax works
New Mexico does not have a separate capital gains rate. Gains are taxed as ordinary income, stacking on top of your other earnings.
Because of that stacking, a large gain can push part of your income into a higher bracket, so the rate on the gain depends on your total income for the year.
New Mexico allows a deduction of up to 40% of net capital gains.
Short-term vs long-term gains
Federally, assets held longer than a year qualify for lower long-term rates. Most states, including New Mexico, do not offer a separate long-term rate.
This calculator estimates the NM state tax by adding the gain to your other income and measuring the extra tax — your true marginal cost.
Lowering the bill
Holding assets longer, harvesting losses to offset gains, and spreading sales across tax years can all reduce what you owe.
Remember this shows New Mexico state tax only; federal capital gains tax applies on top. Verify with the New Mexico Taxation and Revenue Department (tax.newmexico.gov).
Frequently asked questions
Does New Mexico tax capital gains?
Yes — New Mexico taxes capital gains as ordinary income, so the rate depends on your total income.
What is the capital gains tax rate in New Mexico?
Gains are taxed at your New Mexico income tax rate, up to 5.90%, since there is no separate capital gains rate.
Are long-term gains taxed lower in New Mexico?
New Mexico allows a deduction of up to 40% of net capital gains.
Does this include federal capital gains tax?
No. This estimates the NM state tax only. Federal capital gains tax is separate and applies on top.