Reviewed for current 2026 law
New Hampshire Child Support Calculator 2026
Apply the statutory percentage curve to combined annual net income and allocate the result by each parent income share.
Reviewed by SupportDecode Editorial Team Page content reviewed Sources Methodology Update log
child support calculator
Estimated monthly child support: $1,395.00
The paying parent pays this amount to the receiving parent each month.
| Line item | Amount |
|---|---|
| Support allocated per $100 of combined net income for 2 childrenAnnual combined net income: $96,000.RSA chapter 458-C, Child Support Guidelines (New Hampshire General Court) | $27.90 |
| Total monthly support obligationRSA chapter 458-C, Child Support Guidelines (New Hampshire General Court) | $2,232.00 |
| Paying parent proportional shareRSA chapter 458-C, Child Support Guidelines (New Hampshire General Court) | $1,395.00 |
| Obligation after self-support reserve and minimumThe self-support reserve does not reduce this scenario.RSA chapter 458-C, Child Support Guidelines (New Hampshire General Court) | $1,395.00 |
Assumptions
- Entered monthly net income already reflects the standard deductions published under RSA 458-C:2, VI.
- The paying parent adjusted gross income is entered separately for the self-support reserve test.
- Child care, the 4 percent medical-support obligation, and court deviations for parenting schedules or special circumstances are excluded.
Estimate only. The court or state agency calculation controls.
New Hampshire guidelines, effective 2025-01-01.
New Hampshire interpolates between annual net-income percentages
RSA 458-C sets ten combined annual net-income anchors for one, two, three, and four or more children.
The percentage changes directly between anchors, and the combined obligation is divided by each parent income share.
The 2026 self-support reserve is 130 percent of the $15,960 one-person federal poverty guideline, or $20,748 yearly.
Worked example: two children
- Combined monthly net income is $8,000, or $96,000 yearly.
- The interpolated two-child percentage is 27.9 percent.
- The payer 62.5 percent share is $1,395 monthly.
The steps above follow the calculation method described on our methodology page.
Use guideline net income
Enter net income after the standard deductions published for RSA 458-C.
Enter payer adjusted gross income separately for the self-support test.
What this estimate includes
- Direct percentage interpolation
- Income-share allocation
- 2026 self-support reserve
What it leaves out
- Gross-to-net tax conversion
- Child care and medical support
- Parenting-schedule and special-circumstance deviations
New Hampshire child support calculator FAQs
Does New Hampshire use gross or net income?
The percentage table uses combined net income after the statutory standard deductions.
How is the percentage selected?
It is interpolated directly between the annual net-income anchors in RSA 458-C:3.
What is the minimum order?
The statutory minimum is $50 monthly unless the court finds a lesser amount appropriate.
What is the 2026 self-support reserve?
It is 130 percent of the one-person federal poverty guideline, or $20,748 annually and $1,729 monthly.
Does equal parenting automatically change the amount?
No fixed adjustment is encoded. Current law treats parenting schedules through rebuttable presumptions and case findings.
Can the court deviate?
Yes. RSA 458-C:5 lists special circumstances that may justify an adjustment.
Official sources
Official sources last verified: .
- RSA chapter 458-C, Child Support Guidelines
New Hampshire General Court Last checked
- 2026 HHS Poverty Guidelines
U.S. Department of Health and Human Services Last checked
Changelog: page reviewed . Material changes appear in the update log.