New Hampshire calculates child support as a percentage of net income under RSA chapter 458-C, using statutory interpolation across a published table. This calculator validates the DHHS standardized deduction against the full table rather than approximating it, applies a $1,729 self-support reserve and $50 minimum order, and flags New Hampshire’s 2025 parenting-schedule presumptions where they’re relevant.
Key facts
| Model | Percentage of net income — RSA ch. 458-C |
|---|---|
| Self-support reserve | $1,729/month |
| Minimum order | $50/month |
| Deduction table | DHHS standardized deduction, validated against the full published table |
| Parenting schedule | 2025 presumptions flagged |
Official source: https://gc.nh.gov/rsa/html/XLIII/458-C/458-C-mrg.htm
Custody arrangements covered
- Statutory interpolation applies across the percentage-of-net-income table
Frequently asked questions
What statute governs New Hampshire child support?
RSA chapter 458-C, which sets a percentage-of-net-income table.
Does New Hampshire have a self-support reserve?
Yes — $1,729 per month, plus a $50 minimum order.
How does this calculator handle the DHHS deduction?
It validates the DHHS standardized deduction against the full published table rather than approximating it.
What are New Hampshire’s 2025 parenting-schedule presumptions?
This calculator flags where the 2025 parenting-schedule presumptions are relevant to the case.
Update history
- — New Hampshire went live under RSA 458-C, using the percentage-of-net table with statutory interpolation, a $1,729 self-support reserve, and a $50 minimum order. Validated against the full published table and the DHHS standardized deduction.