New Mexico’s capital gain deduction after HB 252
New Mexico’s 2024 reform, HB 252, rebuilt the brackets into six bands topping out at 5.9% above $210,000 for single filers, and narrowed the capital gains deduction. Most sellers now deduct the smaller of their net capital gain or $2,500. The larger 40% deduction, subject to a $1 million limit, is reserved for gains from selling a business, allocated to New Mexico.
For a single filer whose New Mexico taxable income, after the deduction, climbs from $60,000 to $110,000, the six-band schedule raises tax from $2,411 to $4,848. Married couples filing separately must allocate the deduction between them, and the business-sale version needs records showing the business and its New Mexico allocation.
New Mexico approved resident annual comparison
New Mexico’s enacted HB252 supplies the revised six-band ordinary income-tax schedule beginning in 2025. The current annual estimate uses those operative bands for 2026 rather than a proposed future rate structure. The state capital-gain deduction is also transaction-specific; applying 40% to every security or property sale would produce an unsupported taxable base.
The capital deduction compares the permitted small-gain amount, limited to positive net capital gain and $2,500, with the applicable 40% deduction on qualifying business-sale gain allocated to New Mexico, subject to its $1 million limitation. Prepare the statutory qualification, allocation, netting and married-separate deduction allocation before entering taxable income. A federal home-sale exclusion and a state deduction are separate reconciliations.
Enter approved New Mexico annual taxable balances after the actual deduction and other state adjustments, together with complete usable nonrefundable credit totals. The resident estimate repeats the ordinary schedule and subtracts those credits within each annual liability. It does not decide business-sale qualification from an asset label. Nonresident sourcing, additional assessments, refunds and final tax-table effects belong in prepared final-liability mode.
New Mexico preparation checklist
- Actual state taxable bases after approved basis, netting, deductions and exemptions
- Qualifying allocated business-sale deduction
- Married-separate deduction allocation