How to Use the New Hampshire Child Support Calculator
Enter what you know and press Calculate Estimate. The calculator follows RSA 458-C and the 2026 Child Support Guidelines book (Calculation Table DCSS s651 and Worksheet DCSS 650).
- Enter each parent's gross monthly income. The New Hampshire table already accounts for federal tax and FICA.
- Choose the number of children and the parent the children live with most of the time (the obligee).
- Add work-related child care and the cost of adding the children to health insurance, and say who pays them.
- Optionally enter the overnights a year with the other parent to see the parenting schedule notes.
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 Hampshire court or BCSS sets the actual amount.
New Hampshire Child Support in 2026
Looking for New Hampshire child support guidelines for 2026? BCSS publishes a new Child Support Guideline Calculation Table every year. The 2026 table (BCSS PR 26-01) uses the 2026 federal withholding tables and sets the self-support reserve at $1,729 a month (130% of the federal poverty guideline for one person). The parenting schedule rules in RSA 458-C:5, I(h) took effect January 1, 2025.
The 2026 Calculation Table
The table applies these percentages of combined net income from RSA 458-C:3 (annual net income), interpolated between levels:
| Annual net income | 1 child | 2 children | 3 children | 4+ children |
|---|
| $15,000 or less | 25.6% | 35.5% | 42.5% | 45% |
| $25,000 | 25% | 35% | 42% | 44.5% |
| $35,000 | 24% | 33.5% | 40.5% | 43% |
| $50,000 | 23% | 31.5% | 38% | 40.5% |
| $60,000 | 22% | 30.5% | 36.5% | 39% |
| $70,000 | 21.5% | 30% | 36% | 38.5% |
| $80,000 | 21% | 29% | 35% | 37.5% |
| $90,000 | 21% | 28.5% | 34.5% | 37% |
| $100,000 | 20% | 27.5% | 33% | 35.5% |
| $125,000 or more | 19% | 26% | 31% | 33.5% |
Sample rows from the 2026 table (combined adjusted monthly gross income):
| Combined adjusted monthly gross | 1 child | 2 children | 3 children |
|---|
| $5,000 - $5,009 | $964.94 | $1,322.17 | $1,594.50 |
| $8,000 - $8,009 | $1,348.50 | $1,869.31 | $2,251.32 |
| $10,000 - $10,009 | $1,607.63 | $2,190.67 | $2,644.66 |
The 2026 table runs from $1,720 to $31,119 a month in $10 rows.
New Hampshire 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 table gives $1,348.50, and A's 62.5% share is $843 a month.
Example 2: Two children, B pays child care and insurance
A earns $6,000 and B earns $4,000; B pays $600 child care and $200 insurance. The table gives $2,190.67 at $10,000. B's $800 is subtracted for the shares, so A's share is 65.22%: $1,429 a month.
Example 3: A pays the insurance
Same incomes, two children, A pays $300 insurance. A's adjusted income is $5,700, the table gives $2,150.10 at $9,700, and A pays $1,263 a month.
Example 4: Self-support reserve
A earns $2,000 and B earns $3,000, one child. A's share would be $385.98, but only $271 is above the $1,729 reserve: $271 a month.
These are illustrations produced from the guidelines, not court rulings.
Frequently Asked Questions About New Hampshire Child Support
Is this the official New Hampshire child support calculator?
No. ChildSupportCalculator.xyz is an independent tool and is not affiliated with the State of New Hampshire, its courts or DHHS. It applies RSA 458-C and the 2026 table. A court or BCSS sets the actual amount.
Does New Hampshire use gross or net income?
You start with gross income. The 2026 table converts combined adjusted gross income to net income by deducting federal tax and FICA, then applies the percentage.
What is the self-support reserve in New Hampshire for 2026?
$1,729 a month, 130% of the federal poverty guideline for one person.
What is the minimum child support in New Hampshire?
$50 a month, unless the court finds a lower amount appropriate.
How does 50/50 parenting time affect child support in New Hampshire?
With an approximately equal schedule (each parent over 40%), substantially similar incomes and 50/50 sharing of expenses, there is a presumption of $0 support. Otherwise the court may adjust.
How are child care and health insurance handled in New Hampshire?
Child care and the cost of covering the children are deducted from the income of the parent who pays them before the shares are figured.
Is there an income cap in New Hampshire?
The 2026 table ends at $31,119 a month of combined adjusted gross income; above that the top percentages apply and high income can be a special circumstance.
Does the New Hampshire calculator need my personal details or a login?
No. This site needs no login and does not store your numbers.
Official New Hampshire 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
