Alaska Child Support Calculator & Guide (2025)
Overview of Alaska Child Support
Alaska uses a Percentage of Income model under Civil Rule 90.3. This straightforward approach applies a fixed percentage to the non-custodial parent's adjusted annual income based on the number of children.
Alaska is one of the few states that uses the Percentage of Income model and also has no state income tax, which can affect how net income is calculated. The formula is transparent and easy to apply, though courts have discretion to deviate when circumstances warrant.
How Child Support Is Calculated in Alaska
The Alaska child support formula works as follows:
- Determine adjusted annual income: Start with gross income from all sources and subtract federal taxes, Social Security, Medicare, health insurance for the child, and mandatory deductions
- Apply the percentage based on the number of children
- No income cap applies — the percentage is applied to all income
- Adjust for shared custody if the parent has more than 30% of overnights
- Add medical support (health insurance costs are typically separate)
Alaska Child Support Percentages
| Number of Children | % of Adjusted Annual Income | Example ($60,000/yr adjusted) |
|---|---|---|
| 1 child | 20% | $12,000/yr ($1,000/mo) |
| 2 children | 27% | $16,200/yr ($1,350/mo) |
| 3 children | 33% | $19,800/yr ($1,650/mo) |
| 4 children | 36% | $21,600/yr ($1,800/mo) |
| 5+ children | 38%+ | $22,800+/yr ($1,900+/mo) |
Key Factors in Alaska Calculations
Adjusted Annual Income
Alaska defines "adjusted annual income" as gross income from all sources minus:
- Federal income taxes
- Social Security taxes (6.2%)
- Medicare taxes (1.45%)
- Health insurance premiums for the child
- Mandatory union dues
- State income tax (not applicable — Alaska has no state income tax)
Shared Custody Adjustments
When a parent has the child for more than 30% of overnights (over 110 overnights per year), Alaska provides a shared custody adjustment that can reduce the support obligation. The adjustment accounts for the direct costs the parent incurs while the child is in their care.
No Income Cap Advantage
Unlike many states that cap the income subject to child support, Alaska applies its percentages to the parent's entire adjusted annual income. This means higher-earning parents will typically have higher support obligations without a ceiling.
Minimum and Maximum Amounts
Minimum: $50 per month is the minimum child support order in Alaska.
Maximum: There is no statutory income cap. The percentage applies to all adjusted income, regardless of amount.
Modification and Enforcement
Modification
Alaska allows modification when:
- There has been a material change in circumstances
- A significant change in income has occurred
- Custody arrangements have changed
- The child's needs have substantially changed
Enforcement
The Alaska Child Support Services Division (CSSD) enforces child support through:
- Income withholding from paychecks
- Tax refund interception (federal and state Permanent Fund Dividend)
- Driver's license suspension
- Professional license suspension
- Credit bureau reporting
- Contempt of court proceedings
- Liens on property and financial accounts
- Passport denial for arrears over $2,500
Get your Alaska estimate: Use our free child support calculator to see what you might owe or receive under Alaska's Civil Rule 90.3 guidelines, or try the Alaska-specific calculator.
Frequently Asked Questions
How is child support calculated in Alaska?
Is there an income cap for Alaska child support?
What is the minimum child support in Alaska?
Does Alaska consider both parents' income?
Does Alaska have a state income tax?
Legal Disclaimer
This article is for informational purposes only and does not constitute legal advice. Child support laws vary by state and are subject to change. For advice specific to your situation, please consult a qualified family law attorney in your jurisdiction.