Alaska Child Support Calculator

How Alaska's Child Support Formula Works

Alaska determines child support by taking a flat percentage of the non-custodial parent's adjusted annual income. Governed by Alaska Civil Rule 90.3, this percentage increases based on the number of children you have, starting at 20% for one child.

Shared Custody & Other Adjustments in AK

In Alaska, if you have shared physical custody, the child support calculation is adjusted. Under Alaska Civil Rule 90.3(b), this applies when the non-custodial parent has the children for at least 30% of the year (110 overnights), which modifies the standard formula to account for the increased time and costs.

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✓ Verified for 2026 Guidelines • Reviewed October 2026 by Harmoney

Alaska Child Support Guidelines at a Glance

Guideline Model Percentage of Obligor Income
Governing Legal Authority Alaska Civil Rule 90.3
Shared Custody Threshold 110 Overnights (30% time)
Age Support Ends Age 18 (or 19 if in High School)
Modification Standard 15% Change in Support Amount

Alaska Child Support FAQs


At what age does child support end in AK?

Child support in Alaska ends when a child turns 18, but it can be extended to age 19 if the child is unmarried, living with the custodial parent, and actively pursuing their high school diploma. This is governed by Alaska Statute 25.20.010. Support obligations automatically terminate without a court order upon the child reaching the age of majority.

How is child support calculated if one parent is unemployed in AK?

The court will typically impute potential income to an unemployed or underemployed parent based on their work history, qualifications, and local job opportunities. Under Alaska Civil Rule 90.3(a)(4), income is not imputed if the parent is physically or mentally incapacitated or is caring for a child under two years old.

How do I modify a child support order in AK?

You can modify a child support order in Alaska by showing a material and substantial change in circumstances since the last order was issued. A change that results in a 15% or greater difference in the calculated child support amount is presumed to be a material and substantial change, as specified in Alaska Civil Rule 90.3(h)(1).

Does AK child support cover college expenses?

No, Alaska law does not require parents to pay for college expenses as part of child support after a child reaches the age of majority. Support for post-secondary education can only be enforced if the parents have a separate, written agreement to contribute to these costs.

How does AK handle health insurance and childcare costs?

Health insurance premiums and reasonable work-related childcare costs are added to the basic child support obligation and are typically divided between the parents in proportion to their adjusted incomes. Alaska Civil Rule 90.3 allows for these actual, paid expenses to be included in the final support order.