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Alaska Child Support Calculator
Estimate Alaska child support with Civil Rule 90.3: a percentage of the paying parent's adjusted annual income, the $138,000 cap, the $50 minimum and the shared custody calculation.
How to Use the Alaska Child Support Calculator
Enter what you know and press Calculate Estimate. The calculator follows Alaska Civil Rule 90.3, as amended effective October 16, 2023.
- Enter each parent's gross monthly income. The calculator estimates federal income tax, Social Security and Medicare to find adjusted annual income.
- Choose the number of children and the parent with primary custody.
- Enter the overnights a year with the other parent. At 110 or more for each parent (30%), the shared custody formula is used.
- Add monthly work-related child care (deducted from the paying parent's income) and the children's health insurance premium, which is split 50/50.
Your numbers are sent with the form, not placed in the page address, and this site does not store them. This is a planning estimate. An Alaska court or the Child Support Services Division decides the actual amount.
Alaska Child Support Rules for 2026
Looking for new child support guidelines in Alaska for 2026? The current version of Civil Rule 90.3 comes from Supreme Court Order No. 2004, effective October 16, 2023. It raised the income cap to $138,000 of adjusted annual income, added a low-income adjustment for parents earning $30,000 a year or less, limited deductions for retirement contributions and health premiums, and allowed up to a 75% credit for extended visitation of more than 27 days. We found no newer change as of October 2026. This page will be updated if the rule changes.
A change in the rule does not automatically change an existing order. A parent can ask for a modification, and a change of 15% or more is presumed to be a material change.
How Alaska Calculates Child Support
Alaska uses a percentage of the noncustodial parent's adjusted annual income. The custodial parent's income is not used in primary custody cases.
| Children | Percentage of adjusted income |
|---|
| 1 | 20% |
| 2 | 27% |
| 3 | 33% |
| 4 | 36% |
| Each additional child | +3% |
Adjusted annual income is total income from all sources, including the Permanent Fund Dividend, minus mandatory income taxes, Social Security and Medicare, mandatory union dues and retirement contributions, voluntary retirement contributions (up to 7.5% combined), prior support orders, in-kind support for other children, work-related child care, the parent's own health, dental and vision premiums (up to 10% of income) and certain life insurance premiums (up to $1,200 a year).
Shared Custody in Alaska
Shared custody means each parent has physical custody at least 30% of the year (110 overnights) under the custody order. Rule 90.3(b) then works like this:
- Calculate what each parent would pay the other under primary custody (with the cap and minimum).
- Multiply each amount by the other parent's percentage of custody time.
- The parent with the larger figure pays the difference times 1.5, but never more than the primary custody amount.
Failing to use enough custody time to qualify is grounds for modifying the order.
Alaska Child Support Examples
Amounts are monthly and come from this calculator, with estimated federal tax.
Example 1: One child
The paying parent earns $5,000 a month ($60,000 a year). Adjusted income is about $50,390, and 20% is about $840 a month.
Example 2: Two children
The paying parent earns $8,000 a month. Adjusted income is about $76,366, and 27% is about $1,718 a month.
Example 3: Shared custody
A earns $7,000 and B earns $3,000, one child, 146 overnights with A. After cross-multiplying and the 1.5 factor, A pays about $708 a month.
Example 4: High income
A earns $20,000 a month with three children. Adjusted income is capped at $138,000, so 33% is $3,795 a month, unless the court orders more.
These are illustrations produced from the rule, not court rulings.
Frequently Asked Questions About Alaska Child Support
Is this the official Alaska child support calculator?
No. ChildSupportCalculator.xyz is an independent tool and is not affiliated with the State of Alaska, its courts or the Child Support Services Division. It applies Civil Rule 90.3. A court sets the actual amount.
How is child support calculated in Alaska?
As a percentage of the paying parent's adjusted annual income: 20% for one child, 27% for two, 33% for three, plus 3% for each additional child.
What is the income cap for child support in Alaska?
Adjusted annual income above $138,000 is not counted under the standard calculation. A court may order more if it is just and proper.
What is the minimum child support in Alaska?
$50 a month, except in certain cases.
How does shared custody work in Alaska?
If each parent has the children at least 30% of the year (110 overnights), each parent's amount is multiplied by the other parent's custody percentage, and the difference is multiplied by 1.5.
Does the other parent's income matter in Alaska?
Not in primary custody cases. It matters in shared, divided and hybrid custody.
Is the Permanent Fund Dividend counted as income?
Yes. The PFD is part of total income under Rule 90.3. This calculator does not add it automatically.
How is health insurance split in Alaska?
The children's premium is split 50/50 unless the court finds good cause, and uncovered medical costs are presumed to be shared equally (the presumption does not apply above $5,000 in a year).
Are there new child support rules in Alaska in 2026?
We found no change since October 16, 2023, when the income cap rose to $138,000 and a low-income adjustment was added.
Does the Alaska calculator need my personal details or a login?
No. This site needs no login and does not store your numbers.
Official Alaska Child Support Resources
Published: October 17, 2026
Last reviewed: October 17, 2026
Researched and reviewed by Eric John, founder and editor, using official state statutes and guidance. How we build and check our calculators · Corrections
