Estimate Alaska child support under Alaska R. Civ. P. 90.3 — Percentage of Income model, current caps and percentages, with a step-by-step worked example.
| Guideline model | Percentage of Income |
|---|---|
| Income basis | Net (after-tax) income |
| How it works | 20% for 1 child, 27% for 2 children, 33% for 3 children, 36% for 4 children, 39% for 5 children. |
| Caps & limits | Adjusted annual income above $138,000 excluded absent contrary evidence (Rule 90.3(c)(2)); v1 implements primary-custody formula only — shared custody (30%+ overnights each) uses a different cross-multiplication |
| Statute / rule | Alaska R. Civ. P. 90.3 |
| Parameters verified | 2026-07 |
Result: $1,350 per month
Alaska applies fixed percentages of the paying parent’s net (after-tax) income under Alaska R. Civ. P. 90.3. 20% for 1 child, 27% for 2 children, 33% for 3 children, 36% for 4 children, 39% for 5 children.
Alaska calculates support on net (after-tax) income as defined in Alaska R. Civ. P. 90.3. Adjusted annual income above $138,000 excluded absent contrary evidence (Rule 90.3(c)(2)); v1 implements primary-custody formula only — shared custody (30%+ overnights each) uses a different cross-multiplication.
Yes. The guideline amount under Alaska R. Civ. P. 90.3 is presumptive, not absolute - courts may deviate with written findings for factors like extraordinary medical or educational needs, other children supported, or very high income beyond the guideline range.
Apply through the Alaska child support agency or the family court in your county. Existing orders can be modified on a substantial change in circumstances - typically a significant income change, job loss, or a change in custody. The official calculator/worksheet is linked on this page (webapp.state.ak.us).
27% of the paying parent’s net (after-tax) income under Alaska R. Civ. P. 90.3. See the calculator above for your exact figure.
Estimate only — not legal advice. Based on Alaska guidelines (Alaska R. Civ. P. 90.3), last verified 2026-07. Courts may deviate. For an official figure use the official Alaska calculator.