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New Mexico Child Support Calculator
Estimate New Mexico child support with NMSA 40-4-11.1, as amended by SB 223, and the basic child support schedule with self-support reserve effective January 1, 2024.
How to Use the New Mexico Child Support Calculator
Enter what you know and press Calculate Estimate. The calculator follows NMSA 40-4-11.1 as amended by SB 223 (2023) and the basic child support schedule effective January 1, 2024.
- Enter each parent's gross monthly income.
- Choose the number of children and the parent with primary physical custody.
- Enter the days a year the children spend with the other parent. At least 35% of the year (about 128 days) in each home uses shared responsibility Worksheet B.
- Add the children's medical and dental insurance and work-related child care, and say who pays them.
Your numbers are sent with the form, not placed in the page address, and this site does not store them. This is a planning estimate. A New Mexico court sets the actual amount.
New Mexico Child Support Guidelines in 2026
Looking for New Mexico child support guidelines for 2026? The current schedule took effect on January 1, 2024 under SB 223 (2023). The schedule runs to $40,000 of combined monthly income, shared responsibility starts at 35% of the year in each home, and the schedule includes a self-support reserve (the shaded area of the schedule; $1,200 a month for one person in the HSD rule). We found no newer schedule for 2026.
The New Mexico Basic Child Support Schedule
Sample rows (combined monthly gross income):
| Combined gross income | 1 child | 2 children | 3 children |
|---|
| $1,651 - $1,700 | $229 | $232 | $234 |
| $7,951 - $8,000 | $1,057 | $1,583 | $1,883 |
| $9,951 - $10,000 | $1,184 | $1,754 | $2,060 |
| $11,951 - $12,000 | $1,347 | $2,002 | $2,360 |
| $39,951 - $40,000 | $2,956 | $4,341 | $5,058 |
Above $40,000 a month: $2,956 + 5.4% (1 child), $4,341 + 7.7% (2), $5,058 + 8.7% (3), $5,650 + 9.7% (4), $6,214 + 10.7% (5) or $6,755 + 11.6% (6) of income over $40,000.
Self-Support Reserve (Shaded Area)
If the paying parent's own income falls in the shaded area of the schedule for the number of children (up to $1,800 for one child, $2,200 for two, $2,500 for three, $2,700 for four, $2,900 for five and $3,100 for six), only that parent's income is used, the paying parent pays 100% of that schedule amount, and child care and medical costs are not added. This uses Worksheet A only.
Shared Responsibility (Worksheet B)
When the children spend at least 35% of the year in each home and the parents share duties and expenses:
- Multiply the basic support amount by 1.5.
- Split it by each parent's income percentage.
- Each parent keeps the part matching the days the children spend with that parent (days / 365).
- Offset the remaining amounts, then share insurance, child care and other costs by income.
New Mexico Child Support Examples
In each example the children live with Parent B. Amounts are monthly and come from this calculator.
Example 1: One child
A earns $5,000 and B earns $3,000 ($8,000 combined). The schedule gives $1,057, and A's 62.5% share is $660.63 a month.
Example 2: Two children with insurance and child care
A earns $6,000 and B earns $4,000; B pays $200 insurance and $600 child care. A pays 60% of $2,554: $1,532.40 a month.
Example 3: Shared responsibility
A earns $7,000 and B earns $5,000, two children, 146 days with A. Worksheet B gives $550.55 a month from A.
Example 4: Self-support reserve
A earns $1,700, one child. A's income is in the shaded area, so A pays the schedule amount at $1,700 alone: $229 a month.
These are illustrations produced from the guidelines, not court rulings.
Frequently Asked Questions About New Mexico Child Support
Is this the official New Mexico child support calculator?
No. ChildSupportCalculator.xyz is an independent tool and is not affiliated with the State of New Mexico or its courts. It applies NMSA 40-4-11.1 and the 2024 schedule. A court sets the actual amount.
Does New Mexico use gross or net income?
Gross income of both parents.
When did New Mexico's current child support schedule start?
January 1, 2024, under SB 223 (2023), including the self-support reserve.
How many days count as shared custody for child support in New Mexico?
At least 35% of the year in each home (about 128 days) uses shared responsibility Worksheet B.
What is the self-support reserve in New Mexico?
The shaded low-income area of the schedule. If the paying parent's income is in it, only that parent's income is used and child care and medical costs are not added.
Are child care and health insurance included in New Mexico?
Yes. They are added to the basic amount and shared by income; the parent who pays them gets credit.
Is there an income cap in New Mexico?
The schedule goes to $40,000 a month and then uses a formula: a base amount plus a percentage of income over $40,000.
Does the New Mexico calculator need my personal details or a login?
No. This site needs no login and does not store your numbers.
Official New Mexico Child Support Resources
Published: October 19, 2026
Last reviewed: October 19, 2026
Researched and reviewed by Eric John, founder and editor, using official state statutes and guidance. How we build and check our calculators · Corrections
