Child Support in New Mexico: How It's Calculated
New Mexico uses the Income Shares Model to determine child support obligations. This guide walks through how the formula works, what factors New Mexico courts consider, and how to modify or enforce an order — with links to official New Mexico resources.
Income Shares Model in New Mexico
New Mexico uses the Income Shares Model under NMSA §40-4-11.1. Both parents' gross monthly incomes are combined to determine a basic child support obligation from the guidelines schedule, then allocated proportionally between parents.
New Mexico provides a shared custody adjustment when each parent has the child for at least 35% of the time (approximately 128 overnights per year). New Mexico's guidelines also address the imputation of income where a parent is voluntarily unemployed or underemployed. Medical and childcare expenses are added to the basic obligation before proportional allocation.
Key Factors New Mexico Courts Consider
- Both parents' gross monthly income
- Number of children
- Parenting time — 35%+ shared custody triggers an adjustment
- Child's health insurance costs
- Work-related childcare expenses
- Extraordinary medical or educational expenses
- Income imputation for underemployed parents
Official New Mexico Resources
Get an accurate number from an official source
Child support calculations are complex and fact-specific. For an accurate figure, use New Mexico's official worksheet or consult a licensed family law attorney. This guide explains the framework — it does not produce a binding calculation.
Step-by-Step: How New Mexico's Formula Works
Here is how New Mexico applies the Income Shares Model to calculate a child support obligation, step by step:
1. Determine each parent's income
New Mexico starts by calculating each parent's income — gross income (before taxes). The specific definition of income is set by Income Shares Model.
2. Combine incomes and find the basic obligation
Both parents' incomes are combined and compared to New Mexico's child support schedule. The schedule produces a basic child support obligation based on combined income and the number of children.
3. Add health insurance and childcare costs
Health insurance premiums paid for the child and work-related childcare expenses are added to the basic obligation before it is divided between parents.
4. Divide proportionally based on income share
The total obligation is allocated between the parents in proportion to each parent's share of combined income. The parent with the higher income share bears a larger portion of the obligation.
5. Apply parenting time credits
Parenting time — 35%+ shared custody triggers an adjustment shared custody adjustment when each parent has the child for at least 35% of the time (approximately 128 overnights per year).
Document Everything for Your New Mexico Case
New Mexico courts rely on documented records — parenting time logs, expense receipts, and payment histories. ReplyCalmly helps you track all of it and generate organized, exportable reports.
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