Child Support
RSA 458-C:3 — a share of the parents' combined net income, and a review every 3 years
The total support obligation is the parents' total net income multiplied by the percentage the guidelines give, which falls as income rises. Two rows of the table:
| Combined net income | 1 child | 2 children | 3 children | 4 or more |
|---|---|---|---|---|
| Combined net income$15,000 or less | 1 child25.6 percent | 2 children35.5 percent | 3 children42.5 percent | 4 or more45 percent |
| Combined net income$50,000 | 1 child23 | 2 children31.5 | 3 children38 | 4 or more40.5 |
Who handles this in New Hampshire: 603 Legal Aid; and legal aid programs, lawyer referral and the state offices, listed in the New Hampshire directory.
Either parent may apply to change an order 3 years after the last one without showing a substantial change of circumstances.
Knowingly failing to provide support one is legally obliged and able to provide to a spouse, child or other dependent is the crime of non support.
How the table applies to a particular household is a question for a licensed New Hampshire attorney.
Sources for this section (3)
- RSA 458-C:3 — Child Support Formula
- RSA 458-C:7 — Modification of Order
- RSA 639:4 — Non-Support
Legal information, not legal advice. Verified as of October 2026. Applying it to a particular situation is the work of a licensed New Hampshire attorney.