Alaska Child Support Calculator (2026)
Alaska calculates child support under percentage-of-income guidelines (Alaska R. Civ. P. 90.3 ('Child Support Awards')). Estimate the guideline amount below.
Income basis: non-custodial parent's (obligor's) own adjusted annual income.
Enter the income above to see the guideline estimate.
Simplified guideline estimate — before health-insurance, childcare, and parenting-time adjustments. For the exact figure use the official Alaska calculator.
Your Case Details
Answer a few questions to see your estimated range.
Approximate gap between higher-earner and lower-earner.
Estimated Monthly Support
$840 — $1,560
State formulas vary significantly. This estimate uses national averages — your state's guidelines may produce a different number.
Editorially Reviewed — Content reviewed for accuracy using published legal research, government data, and verified court records. See our methodology
Reviewed by Leonard Goldberg, Editor · Last updated
Alaska child support is a percentage of the paying parent's non-custodial parent's (obligor's) own adjusted annual income: 20% for one child, 27% for two, rising to 39% for 5 or more (Alaska R. Civ. P. 90.3 ('Child Support Awards')). The percentages apply up to $138,000 of annual income — details in the cap section below. Enter the paying parent's income above for the guideline figure.
How Alaska Calculates Child Support
Alaska calculates child support under Civil Rule 90.3 by applying a flat percentage directly to the obligor's (non-custodial parent's) own adjusted annual income — unlike income-shares states, Alaska does NOT combine both parents' incomes into a joint table. The percentage is 20% for one child, 27% for two, 33% for three, plus an extra 3% for each additional child, applied to income up to a $138,000 ceiling (last set by SCO 1919/SCO 1939, effective 2018). A Low-Income Adjustment giving obligors earning $30,000/year or less a flat $7,500 standard deduction was added in 2023 to satisfy federal self-support-reserve requirements. Shared physical custody (each parent has the children at least 30% of overnights, i.e. 110+ nights/year) is calculated with a separate reciprocal offset-and-1.5-multiplier formula under Rule 90.3(b).
Statutory basis: Alaska R. Civ. P. 90.3 ('Child Support Awards'). Exact figure: official Alaska calculator.
Alaska Guideline Percentages
| Children | Share of non-custodial parent's (obligor's) own adjusted annual income |
|---|---|
| 1 | 20% |
| 2 | 27% |
| 3 | 33% |
| 4 | 36% |
| 5 | 39% |
Worked Example
Primary custody, 2 children: obligor's adjusted annual income is $60,000. Support = $60,000 × 27% = $16,200/year ($1,350/month), paid in 12 equal installments. If that parent instead earned $200,000/year, only the first $138,000 is multiplied by 27% ($37,260/year = $3,105/month); anything above requires a separate 'just and proper' showing. If the obligor's total annual income were $28,000 (under the $30,000 low-income threshold), the 2023 Low-Income Adjustment lets the court use the lesser of the itemized-deduction figure or ($28,000 − $7,500 = $20,500); 27% × $20,500 = $5,535/year ($461/month), still above the $50/month floor.
When Courts Deviate From the Guideline
- Especially large family size that makes the standard percentage unjust
- Significant income earned directly by a child (not the parents)
- Extraordinary health or other extraordinary expenses of a parent or child
- Unusually low expenses relative to the guideline assumptions
- Substantial hardship to the obligor's 'subsequent' children (born/adopted after the support order) if support is not reduced, in limited circumstances
- A property settlement that specifically and documentedly gave one parent substantially more assets in lieu of child support
Frequently Asked Questions
Is there a cap on the income used to calculate Alaska child support?
Yes. Rule 90.3(c)(2) caps the percentage calculation at the first $138,000 of the paying parent's adjusted annual income. Income above that level isn't automatically added — the court may order more only if it finds an additional amount 'just and proper' based on the children's needs, their standard of living, and the parent's ability to pay.
What counts as 'income' under Alaska's child support formula?
Rule 90.3's official Commentary lists a broad range: wages, overtime, tips, commissions, self-employment income, bonuses, interest and dividends including Permanent Fund Dividends, Social Security, veterans', workers' comp and unemployment benefits, pensions, rental and trust income, regular capital gains, lottery winnings, and Armed Services base pay plus quarters/rations/COLA allowances. Means-tested public assistance — ATAP, Food Stamps, and SSI — is explicitly excluded.
How does shared physical custody change the calculation?
Custody counts as 'shared' under Rule 90.3(f)(1) once the children spend at least 30% (but no more than 70%) of the year — at least 110 overnights annually — with each parent. The court computes what each parent would owe the other under the primary-custody formula, multiplies each figure by the percentage of time the OTHER parent has the children, and orders the parent with the larger resulting figure to pay 1.5 times the difference — capped at what that parent would owe under straight primary custody. If the obligor doesn't actually exercise the required 30%+ of overnights, the plain percentage formula governs instead.
When does child support end in Alaska, and does it cover college?
Rule 90.3 governs support for minor children and, per its official Commentary, was extended by Chapter 117, SLA 1992 to also cover support for children who have turned 18 (typically while still finishing high school). Alaska's guideline formula does not include a college-expense component.