StateTally

New Mexico Alimony Calculator (2026)

Under the New Mexico Supreme Court Alimony Guidelines (NMSA § 40‑4‑7), the court publishes advisory numbers that set a guideline monthly support equal to a percentage of the payor’s gross earnings minus a percentage of the payee’s gross earnings. The formula applies the same 30%/50% split whether or not the couple shares minor children, and the result can never be less than $0. Because the guidelines are advisory, judges may adjust the amount based on the statutory factors.

Reviewed 2026-09-02 · Estimates only — not legal or financial advice.

Before taxes.
Before taxes.
The law behind this calculator: New Mexico spousal support — statutory factors and advisory guidelines — NMSA § 40-4-7; NM Supreme Court Alimony Guidelines.

How New Mexico calculates it

  • Determine each spouse’s monthly gross income.
  • Multiply the payor spouse’s monthly gross by 30%.
  • Multiply the payee spouse’s monthly gross by 50%.
  • Subtract the payee amount from the payor amount.
  • If the subtraction yields a negative number, set the guideline support to $0.

Worked example

With no minor children: payor earns $96,000/year gross ($8,000/month), payee $36,000/year ($3,000/month). 30% × $8,000 = $2,400; 50% × $3,000 = $1,500; difference = $900/month guideline support.

Frequently asked questions

How does New Mexico calculate the guideline amount for alimony?

The guideline uses 30% of the payor’s monthly gross income minus 50% of the payee’s monthly gross income, regardless of whether the couple has minor children, and the result cannot be below $0.

Are New Mexico alimony guidelines binding on the court?

No. The guidelines are advisory; judges consider the statutory factors in NMSA § 40‑4‑7 and may order an amount higher or lower than the guideline.

Does New Mexico tax alimony payments?

New Mexico does not impose a separate state tax on alimony; the tax treatment follows federal law.

How long can alimony last in New Mexico?

Duration is discretionary. Courts may order transitional, rehabilitative, or indefinite support, especially in long marriages.

Do minor children change the alimony calculation in New Mexico?

No. The guideline percentages (30%/50%) are the same whether or not the parties have minor children in common.

Is the calculation different in Albuquerque, Las Cruces or Santa Fe?

No. NMSA § 40-4-7; NM Supreme Court Alimony Guidelines applies statewide, so courts in Albuquerque, Las Cruces, Santa Fe and every other county start from the same guideline. Local practice can differ in how judges weigh deviation factors and in typical negotiated outcomes, but the formula on this page is the one used across New Mexico.

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