Alaska Child Support Calculator (2026)
Alaska’s Civil Rule 90.3 governs primary‑custody child support and limits the income used in the calculation to the first $11,500 of a paying parent’s monthly adjusted earnings.
Reviewed 2026-09-02 · Estimates only — not legal or financial advice.
How Alaska calculates it
- Determine the paying parent’s monthly adjusted income.
- Apply the statutory cap: only the first $11,500 of that monthly income is counted.
- Select the percentage based on the number of children – 1 child = 20%, 2 children = 27%, 3 children = 33%, 4 children = 36%, 5 or more children = 39% (or add 3% for each child beyond three).
- Multiply the applicable percentage by the capped monthly income to get the guideline support amount.
- If the parent’s income exceeds $11,500 per month, any additional support must be justified by proof of the child’s specific needs.
Worked example
A paying parent with $6,500 monthly adjusted income and two children would have a guideline support of 27% × $6,500 = $1,755 per month.
Frequently asked questions
How does Alaska calculate guideline child support for primary custody?
Alaska uses Civil Rule 90.3: the paying parent’s monthly adjusted income is capped at $11,500, then multiplied by a percentage that rises with the number of children (20% for one, 27% for two, 33% for three, plus 3% for each additional child).
What is the income cap for child support in Alaska?
The statute caps the income considered at $11,500 per month (or $138,000 per year). Income above that requires separate proof of the child’s needs.
If I have more than three children, how does the percentage change?
The base rate is 33% for three children; each additional child adds 3% to the percentage, reaching 36% for four children and 39% for five or more.
Is child support taxable in Alaska?
Alaska has no state income tax, so child support payments are not subject to state taxation. Federal tax treatment follows the usual rules.
Can a paying parent be required to pay more than the guideline amount?
Yes. If the parent’s income exceeds the $11,500 monthly cap, the court may order extra support, but the parent must provide evidence of the child’s specific needs beyond the guideline.
Is the calculation different in Anchorage, Fairbanks or Juneau?
No. Alaska Civil Rule 90.3 sets one statewide guideline, so a case in Anchorage, Fairbanks, Juneau uses the same percentages as anywhere else in Alaska. Judges everywhere in the state may deviate only with written findings.