Child Support Formulas by State (2026): Percentages & Caps
Child support is a formula everywhere — but the formula changes at the state line. This table compares the percentage-of-income states we cover, with the exact percentages by number of children and any income cap, each verified against the statute or guideline.
| State | Guideline formula | What it covers | Statute |
|---|---|---|---|
| Alaska | 20/27/33/36/39% of adjusted income for 1–5+ children (income capped at $11,500/mo) | Percentage-of-income model | Alaska Civil Rule 90.3 |
| Mississippi | 14/20/22/24/26% of AGI income for 1–5+ children | Percentage-of-income model | Miss. Code § 43-19-101 |
| Nevada | Tiered % of gross income by children (16% first tier, 1 child) | Percentage-of-income model | NAC § 425.140 |
| Texas | 20/25/30/35/40% of net income for 1–5+ children (income capped at $11,700/mo) | Percentage-of-income model | Tex. Fam. Code §§ 154.125–154.129 |
| Wisconsin | 17/25/29/31/34% of gross income for 1–5+ children | Percentage-of-income model | Wis. Admin. Code DCF § 150.03 |
Covering 5 states so far — more are added in weekly batches. Figures reflect each page's last review date; click a state for the calculator, worked examples, and source citations.