New Mexico Child Support Calculator & Guide (2025)

Overview of New Mexico Child Support

New Mexico uses the Income Shares Model under NMSA §40-4-11.1. Both parents' gross incomes are combined to determine the support obligation, based on the principle that children should receive the same proportion of parental income they would have enjoyed if the family had remained intact.

The New Mexico Child Support Guidelines provide a schedule of basic support obligations based on combined parental income and the number of children, ensuring consistent and fair support orders across the state.

How Child Support Is Calculated in New Mexico

The New Mexico child support formula works as follows:

1. Determine each parent's monthly gross income: Include wages, salary, bonuses, commissions, self-employment income, and other sources
2. Calculate combined monthly gross income for both parents
3. Find the base obligation from the New Mexico child support schedule based on combined income and number of children
4. Allocate each parent's share proportionally based on their percentage of combined income
5. Add health insurance premiums for the child
6. Add work-related childcare costs
7. Add extraordinary medical expenses shared proportionally between the parents

Key Factors in New Mexico Calculations

Gross Income Basis

New Mexico uses gross income for child support calculations. This includes all income from all sources before taxes and deductions, ensuring a comprehensive view of each parent's financial resources available for the child's support.

Self-Support Reserve

New Mexico maintains a self-support reserve of $1,038 per month (2024). This ensures that the parent obligated to pay support retains enough income to meet their own basic living needs. If the support calculation would leave the obligor below this threshold, the obligation may be reduced.

Shared Custody Adjustments

New Mexico provides adjustments for shared custody arrangements. When both parents have significant parenting time with the child, the support calculation may be adjusted to account for the expenses each parent incurs during their parenting time.

Court Deviation

The court may deviate from the guideline amount with specific written findings explaining why the guideline amount is unjust or inappropriate under the circumstances. Factors considered include the child's needs, the parents' financial resources, and the standard of living the child would have enjoyed.

Minimum and Maximum Amounts

Minimum: New Mexico does not have a fixed statutory minimum, but the self-support reserve ensures the obligor retains at least $1,038/month for their own needs.

Maximum: The support schedule extends to higher combined income levels, and the court has discretion for high-income cases above the schedule.

Modification and Enforcement

Modification

New Mexico allows modification when:

• There has been a material and substantial change in circumstances
• A significant change in either parent's income has occurred
• Custody or parenting time arrangements have changed
• The child's needs have materially changed

Enforcement

The New Mexico Human Services Department - Child Support Enforcement Division enforces child support through:

• Income withholding from paychecks
• Tax refund interception
• Driver's license suspension
• Professional license suspension
• Credit bureau reporting
• Contempt of court proceedings
• Liens on property and financial accounts

Get your New Mexico estimate: Use our free New Mexico child support calculator to see what you might owe or receive under New Mexico guidelines.