Calculate Child Support
Before taxes. Include wages, self-employment, bonuses.
New Mexico uses the Income Shares — both incomes required.
0 = no custody · 91 = 25% · 182 = 50/50 · 365 = full custody
$0
estimated monthly support payment
⚠️ Estimate only. Actual court-ordered amounts may vary. Verify with a licensed New Mexico family law attorney.
ℹ️ New Mexico uses the Income Shares — New Mexico uses Income Shares based on combined gross monthly income.
How Child Support Works in New Mexico
New Mexico uses the Income Shares to determine child support obligations.
The Income Shares model combines both parents' incomes, finds the basic support obligation from a state schedule, then divides it proportionally. More parenting time (overnights) reduces the non-custodial parent's payment through a parenting time credit.
How New Mexico Compares to Other States
See how New Mexico's child support rules compare to other states.
| State | Formula | Support Ends | Arrears Rate | Mod. Threshold |
|---|---|---|---|---|
| ★ New Mexico (you) | Income Shares | 18 | 8.75% | 20% |
| Delaware | Melson Formula | 18 | 5% | 10% |
| Idaho | Percentage of Income | 18 | 5% | 15% |
| Michigan | Income Shares | 18 | 5% | 10% |
| Ohio | Income Shares | 18 | 5% | 10% |
| Alaska | Percentage of Income | 18 | 6% | 15% |
| Florida | Income Shares | 18 | 6% | 15% |
| Louisiana | Income Shares | 18 | 6% | 25% |
| New Hampshire | Income Shares | 18 | 6% | 15% |
Showing 8 comparison states. View all 50 states →
Frequently Asked Questions
How is child support calculated in New Mexico?
New Mexico uses the Income Shares model. New Mexico uses Income Shares based on combined gross monthly income.
When does child support end in New Mexico?
Child support generally ends when the child turns 18 in New Mexico.
Can I modify child support in New Mexico?
Yes. New Mexico requires a 20% or greater change in income to qualify. Use our modification checker →
Does 50/50 custody eliminate child support in New Mexico?
Not automatically. The higher-earning parent typically still pays support with 50/50 custody. See our 50/50 guide →
What income is used for child support in New Mexico?
Income includes wages, self-employment, bonuses, rental income, unemployment benefits, disability payments, and Social Security. Courts may impute income if a parent is voluntarily underemployed.