Child support on $100,000 a year in New Hampshire (1 child)
New Hampshire guidelines effective April 1, 2026. New Hampshire overview
If Parent A earns $100,000 a year, Parent B earns $40,000 and the child lives mostly with Parent B (52 overnights a year with Parent A), New Hampshire's guideline amount is $1,256 a month (Parent A pays Parent B).
Across the table below it ranges from $1,179 (Parent B earns $100,000, Parent A has no overnights) to $1,389 (Parent B has no income, Parent A has no overnights).
This is the guideline amount, not a court order.
Change the numbers
Guideline child support
New Hampshire · 1 child · Parent A $100000 per year · Parent B $40000 per year · children live mostly with Parent B
$1,256 a month
Parent A pays Parent B
- Parent A: 71.4% of combined income
- Parent B: 28.6%
How it adds up
- Combined income
- $11,667 a month
- Basic obligation
- $1,758 a month
- Parent A's share of income
- 71.4%
- After the low-income rule
- $1,256 a month
- Guideline amount
- $1,256 a month
See the worksheet for this example
New Hampshire uses the income shares model under N.H. Rev. Stat. Ann. ch. 458-C (RSA 458-C:1 to 458-C:7). Official calculator: business.nh.gov. Child support agency: New Hampshire DHHS Bureau of Child Support Services.
Estimate under New Hampshire's child support guidelines effective April 1, 2026. Verified against the official New Hampshire sources on October 7, 2026. Not legal advice. Courts can deviate from the guidelines. How we calculate →
By parenting time and the other parent's income
| Overnights | $0 | $20,000 | $30,000 | $40,000 | $50,000 | $60,000 | $80,000 | $100,000 |
|---|---|---|---|---|---|---|---|---|
| 0 | $1,389 A→B | $1,340 A→B | $1,283 A→B | $1,256 A→B | $1,230 A→B | $1,205 A→B | $1,182 A→B | $1,179 A→B |
| 52 | $1,389 A→B | $1,340 A→B | $1,283 A→B | $1,256 A→B | $1,230 A→B | $1,205 A→B | $1,182 A→B | $1,179 A→B |
| 104 | $1,389 A→B | $1,340 A→B | $1,283 A→B | $1,256 A→B | $1,230 A→B | $1,205 A→B | $1,182 A→B | $1,179 A→B |
| 128 | $1,389 A→B | $1,340 A→B | $1,283 A→B | $1,256 A→B | $1,230 A→B | $1,205 A→B | $1,182 A→B | $1,179 A→B |
| 182 | $1,389 A→B | $1,340 A→B | $1,283 A→B | $1,256 A→B | $1,230 A→B | $1,205 A→B | $1,182 A→B | $1,179 A→B |
The New Hampshire worksheet for this example
| Line | Official label | Value |
|---|---|---|
| 2-3 | Reasonable medical support obligation (Parent A)Parent A's medical support obligation, 4% of gross income | $333.00 a month |
| 2-3 | Reasonable medical support obligation (Parent B)Parent B's medical support obligation, 4% of gross income | $133.00 a month |
| 4 | Monthly gross income (Parent A)Parent A's monthly gross income | $8,333.33 a month |
| 4 | Monthly gross income (Parent B)Parent B's monthly gross income | $3,333.33 a month |
| 5G | Total deductions (Parent A)Parent A's deductions | $0.00 a month |
| 5G | Total deductions (Parent B)Parent B's deductions | $0.00 a month |
| 6 | Adjusted monthly gross income (Parent A)Parent A's adjusted income | $8,333.33 a month |
| 6 | Adjusted monthly gross income (Parent B)Parent B's adjusted income | $3,333.33 a month |
| 6 | Adjusted monthly gross income (Combined)Combined adjusted income, used for the table row | $11,666.66 a month |
| 7A | Child support guideline amount (From Guideline Calculation Table)Table amount for both parents | $1,757.67 a month |
| 7B | Guideline percentage (From Guideline Calculation Table)Percentage of combined net income | 19.72% |
| 8C | Total allowable Obligee expensesReceiving parent's child care and health coverage costs | $0.00 a month |
| 9 | Total adjusted monthly gross income (Parent A)Parent A's income for the shares | $8,333.33 a month |
| 9 | Total adjusted monthly gross income (Parent B)Parent B's income for the shares | $3,333.33 a month |
| 10 | Proportional share of income (Parent A)Parent A's share | 71.43% |
| 10 | Proportional share of income (Parent B)Parent B's share | 28.57% |
| 11 | Parental support obligation (Parent A)Parent A's share of the table amount | $1,255.50 a month |
| 11 | Parental support obligation (Parent B)Parent B's share of the table amount | $502.17 a month |
| 12 | Self-support reserve | $1,729.00 a month |
| 13 | Income available for supportPaying parent's income above the reserve | $6,604.33 a month |
| 14 | Monthly support payableAfter the ability-to-pay test | $1,255.50 a month |
| 15 | Presumptive child support obligationGuideline amount, rounded to the dollar | $1,256.00 a month |
Open the official Child Support Guidelines Worksheet (DCSS 650) →
With child care and health insurance
| Costs | Guideline amount |
|---|---|
| No add-ons | $1,256 a month A→B |
| Child care $500 a month | $1,312 a month A→B |
| Child care $1,000 a month | $1,373 a month A→B |
| Health insurance $150 a month | $1,272 a month A→B |
| Health insurance $300 a month | $1,289 a month A→B |
Work-related child care and the cost of adding the children to health coverage are deducted from the income of the parent who pays them. Each parent's presumptive reasonable medical support obligation, 4% of gross income, is shown on the worksheet but not added to the amount.
How New Hampshire works it out
New Hampshire applies a percentage to the parents' combined net income: from 25.6% down to 19% for one child as income rises, and from 45% down to 33.5% for four or more children. The state's table builds the net income in, so you enter gross income. Each parent is responsible for their share of the table amount, and the parent the children don't live with pays theirs.
Gross income from almost all sources counts, including alimony received. Support paid under other orders, alimony paid, half of self-employment tax, mandatory retirement contributions and state income tax are deducted. The table converts combined income to net income using the federal withholding for a single person claiming two allowances, plus Social Security and Medicare.
New Hampshire has no parenting-time formula. With approximately equal parenting time, substantially similar incomes and costs shared equally, the law presumes no support is owed; otherwise the parenting schedule is a reason the court may adjust the amount. This estimate shows the worksheet amount.
Frequently asked questions
How much child support is paid on $100,000 in New Hampshire for 1 child?
If Parent A earns $100,000 a year, Parent B earns $40,000 and the child lives mostly with Parent B (52 overnights a year with Parent A), New Hampshire's guideline amount is about $1,256 a month (Parent A pays Parent B).
How much is that a week?
That is about $290 a week (the monthly amount × 12 ÷ 52).
What if the parents share time equally?
With about equal parenting time and the same incomes, the guideline amount is about $1,256 a month (Parent A pays Parent B).
What if Parent B has no income?
If Parent B has no income and the child lives mostly with Parent B, the guideline amount is about $1,389 a month (Parent A pays Parent B).
Official sources and verification
- Law: N.H. Rev. Stat. Ann. ch. 458-C (RSA 458-C:1 to 458-C:7)
- New Hampshire child support guidelines
- Child Support Guidelines Worksheet (DCSS 650)
- Official New Hampshire child support calculator
- New Hampshire DHHS Bureau of Child Support Services
- Changing a New Hampshire child support order
Guidelines effective April 1, 2026. Verified against the official New Hampshire sources on October 7, 2026. How we calculate →