Alaska Child Support Guidelines: How Support Is Calculated

Alaska takes a straightforward approach to child support: the state sets the amount by formula, not by unconstrained judicial discretion. Under Alaska Civil Rule 90.3, a paying parent's obligation is calculated as a fixed percentage of their adjusted income. This percentage-of-income model differs from the income-shares approach used in many other states, where both parents' earnings feed a single combined calculation. In Alaska, the focus is on the obligor — the parent who does not have primary physical custody — and how much that parent earns.

How Adjusted Income Is Calculated

Before any percentage is applied, Alaska law requires computing adjusted income. Under Rule 90.3(a)(1) and its official commentary, the starting point is total income from all sources — wages, self-employment earnings, rental income, investment returns, and similar receipts. From that gross figure, the rule permits these deductions:

• Income taxes
• Mandatory union dues required as a condition of employment
• Mandatory retirement contributions required as a condition of employment
• Voluntary retirement contributions, up to a maximum of 7.5% of gross wages
• Prior child or spousal support obligations you are currently paying under another court order
• Work-related child care costs paid for the children covered by this case

What remains after those deductions is adjusted annual income — the figure that drives every other part of the Rule 90.3 calculation.

The Primary-Custody Formula

When one parent holds primary physical custody, the obligor pays a set percentage of adjusted annual income that scales with the number of children. Under Rule 90.3(a)(2), the rates are:

• One child: 20% of adjusted annual income
• Two children: 27%
• Three children: 33%
• Each additional child beyond three: an additional 3%

These percentages produce an annual obligation; courts convert that figure to a monthly payment in the actual order.

The High-Income Cap

Alaska's formula does not run indefinitely up the income scale. Under Rule 90.3(c)(2), the standard percentages normally apply only to the first $138,000 of adjusted annual income. Income above that cap is not automatically swept into the calculation. However, a court retains discretion to order additional support above the cap. If either parent's income exceeds that threshold, ask an Alaska family-law attorney or the court's self-help center how the discretionary piece is typically handled in your jurisdiction.

The Minimum Award

No matter how modest the obligor's income, Alaska imposes a floor. Under Rule 90.3(c)(3), the court must order at least $50 per month. The minimum keeps a nominal obligation on record even when a parent's current earnings are very low, preserving the enforcement record for the future.

Shared Physical Custody: A Different Formula

Alaska draws a clear line between primary custody and shared custody. Under Rule 90.3(f)(1), shared physical custody applies when children reside with a parent for at least 30% but no more than 70% of the year. Thirty percent works out to roughly 110 overnights per year. If the non-primary parent has fewer than 110 overnights, the straightforward primary-custody formula applies. At 110 overnights or more, a separate shared-custody calculation takes over.

The shared-custody method under Rule 90.3(b)(1) works in four steps:

1. Calculate what each parent would owe if they were the sole obligor — that is, run the primary-custody formula for each parent separately using their own adjusted income.
2. Multiply each parent's primary-custody figure by the other parent's percentage of parenting time.
3. Subtract the smaller result from the larger to get a preliminary difference.
4. Multiply that difference by 1.5 to arrive at the final shared-custody support award.

The 1.5 multiplier reflects the reality that children splitting time between two homes impose costs on both households — each home must maintain space, food, and supplies. The parent who earns more typically pays; which direction money flows depends on the combined result of both incomes and both parenting-time percentages. Count overnights carefully: being on the right or wrong side of the 110-overnight line can change the result substantially.

Enforcement: Federal and State Tools

Alaska's formula produces an order. Collecting on it is a separate matter, and both state and federal law arm courts and the Alaska Child Support Services Division (CSSD) with powerful tools.

Federal law under 42 U.S.C. §§ 654, 659, and 666 requires Alaska — like every state — to operate a Title IV-D enforcement program. That program mandates income-withholding orders (automatic paycheck deductions), license suspension for nonpayment, property liens, and credit-bureau reporting. Under § 659, federal wages and benefits can be garnished because the statute waives sovereign immunity for that purpose. The federal tax-refund offset program under 42 U.S.C. § 664 intercepts state and federal tax refunds and applies them to overdue balances.

One rule that surprises many parents: under the Bradley Amendment, 42 U.S.C. § 666(a)(9)(C), once child support has accrued — once a payment was due and was not made — no court anywhere can retroactively reduce or forgive it. A parent can ask for a prospective modification going forward, but the accumulated past-due balance is locked in permanently.

Interstate Cases

If you or the other parent lives in a different state, federal law under 28 U.S.C. § 1738B requires every state to enforce another state's child-support order and strictly limits which state may modify it. Alaska has also adopted the Uniform Interstate Family Support Act (UIFSA), which determines which state holds continuing, exclusive jurisdiction. Generally, the state that issued the original order retains control as long as one parent or the child still lives there. If your family has spread across state lines, confirm jurisdiction before filing anything — acting in the wrong court can create conflicting orders.

Child Support and Bankruptcy

A parent facing serious financial hardship sometimes wonders whether bankruptcy can eliminate a child-support obligation. Federal law gives a clear answer: no. Under 11 U.S.C. § 523(a)(5), child support is a "domestic support obligation" that cannot be discharged in any chapter of bankruptcy. Beyond that protection, § 507(a)(1) makes child support the first-priority unsecured claim — it is paid before credit cards, medical bills, and nearly every other unsecured debt. Property-settlement obligations from a divorce decree are also generally non-dischargeable in Chapter 7 under § 523(a)(15). Bankruptcy can restructure many financial obligations; child support is not one of them.

Modifying an Existing Order

Circumstances change — a job loss, a significant raise, or a shift in how much time the children spend with each parent can all make an existing order feel wrong. Under Rule 90.3(h)(1), an Alaska court will modify a child-support order when there is a material change in circumstances. The rule treats that standard as satisfied when recalculating support under the current guidelines would produce an award at least 15% different from the existing order. That percentage threshold gives both parents a concrete benchmark: if your income has shifted enough that a fresh calculation would land 15% higher or lower than what the current order requires, you likely have grounds to file. Changes below that level generally will not support a modification on their own, though courts retain some discretion.

Because modifications only take effect going forward — never retroactively — filing promptly matters. Every month of delay before filing is a month of the old amount that is locked in under the Bradley Amendment.

What You Can Do in Alaska

1. Gather your income documentation before any hearing. Collect recent pay stubs, your last two or three tax returns, and records of all other income sources. Also compile evidence of allowable deductions — tax-withholding statements, proof of mandatory union dues, mandatory retirement contribution records, voluntary retirement statements, and work-related child care receipts.
2. Run a preliminary Rule 90.3 calculation. The Alaska Child Support Services Division provides worksheets and online tools built around Rule 90.3. Working through the math before your hearing gives you a realistic expectation and helps you identify errors in figures the other parent submits.
3. Count overnights precisely if shared custody is at issue. Keep a written log or calendar showing which parent has the children each night over the year. Whether you are above or below the 110-overnight threshold changes the formula — and the final dollar amount — significantly.
4. File for modification as soon as your circumstances change materially. The 15% threshold under Rule 90.3(h)(1) is the key question. If you believe a recalculation would clear that bar, file promptly — the new amount only runs from the date you file, not from when the change happened.
5. Open a IV-D case with Alaska CSSD if you need enforcement help. CSSD can pursue income withholding, tax-refund intercepts, and license suspension at no upfront cost to you. If the other parent has left Alaska, CSSD can coordinate with the other state's IV-D agency under UIFSA and 28 U.S.C. § 1738B.
6. Verify jurisdiction before filing if either parent has moved. Moving out of state does not automatically transfer control of the order. Confirm with the Alaska court or a family-law attorney which state currently holds continuing, exclusive jurisdiction before you file any motion.

This article is for general informational purposes only and is not legal advice. Child-support cases depend heavily on specific facts, and rules can change. Consult a licensed Alaska family-law attorney or the Alaska Court System's self-help resources for guidance about your individual situation.