Child Support in Alaska: How It's Calculated
Alaska uses the Income Shares Model (Civil Rule 90.3) to determine child support obligations. This guide walks through how the formula works, what factors Alaska courts consider, and how to modify or enforce an order — with links to official Alaska resources.
Income Shares Model (Civil Rule 90.3) in Alaska
Alaska calculates child support under Civil Rule 90.3, which uses both parents' adjusted income. Alaska's guidelines have historically produced higher baseline amounts than many other states, reflecting the state's elevated cost of living.
Rule 90.3 sets primary physical custody support at a fixed percentage of the noncustodial parent's adjusted annual income: 20% for one child, 27% for two, 33% for three, 37% for four, and 40% for five or more. In shared custody situations, each parent's obligation is calculated separately and the lower amount is subtracted from the higher, creating a net obligation. Adjustments apply for health insurance and childcare.
Key Factors Alaska Courts Consider
- Each parent's adjusted annual income (gross income minus certain deductions like mandatory retirement, prior support orders)
- Number of children
- Custody arrangement — primary, shared, or divided custody changes the formula used
- Health insurance costs for the child
- Work-related childcare costs
- Cost-of-living differences if parents live in different regions of Alaska
- Any extraordinary expenses the child requires
Official Alaska Resources
Get an accurate number from an official source
Child support calculations are complex and fact-specific. For an accurate figure, use Alaska's official worksheet or consult a licensed family law attorney. This guide explains the framework — it does not produce a binding calculation.
Step-by-Step: How Alaska's Formula Works
Here is how Alaska applies the Income Shares Model (Civil Rule 90.3) to calculate a child support obligation, step by step:
1. Determine each parent's income
Alaska starts by calculating each parent's income — gross income (before taxes). The specific definition of income is set by Income Shares Model (Civil Rule 90.3).
2. Combine incomes and find the basic obligation
Both parents' incomes are combined and compared to Alaska's child support schedule. The schedule produces a basic child support obligation based on combined income and the number of children.
3. Add health insurance and childcare costs
Health insurance premiums paid for the child and work-related childcare expenses are added to the basic obligation before it is divided between parents.
4. Divide proportionally based on income share
The total obligation is allocated between the parents in proportion to each parent's share of combined income. The parent with the higher income share bears a larger portion of the obligation.
5. Apply parenting time credits
Custody arrangement — primary, shared, or divided custody changes the formula used custody support at a fixed percentage of the noncustodial parent's adjusted annual income: 20% for one child, 27% for two, 33% for three, 37% for four, and 40% for five or more.
Document Everything for Your Alaska Case
Alaska courts rely on documented records — parenting time logs, expense receipts, and payment histories. ReplyCalmly helps you track all of it and generate organized, exportable reports.
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