When Does Child Support End in Alaska? Age Limits, Exceptions & 2026 Guide

By Antonio G. Jimenez, Esq. | Florida Bar No. 21022 | Covering Alaska divorce law

Child support in Alaska ends when the child turns 18 years old under AS 25.27.060. Alaska extends this obligation to age 19 if the child remains unmarried and is still pursuing a high school diploma or equivalent vocational training while living with the custodial parent. Disability may extend support indefinitely under AS 25.24.140(a). The standard support calculation follows Civil Rule 90.3, which sets the obligation at 20% of the obligor's adjusted annual income for one child. Alaska is one of the few states with no minimum residency period to file for divorce, and the current filing fee is $250 in Superior Court.

Key Facts: Alaska Child Support at a Glance

When Does Child Support End in Alaska: The Standard Rule

Child support in Alaska terminates when the child reaches age 18 under AS 25.27.060. Alaska law imposes a legal duty on both parents to support their children financially until the child reaches the age of majority, which is 18 years old under AS 25.20.010. The obligation applies regardless of whether the parents were married, and it covers basic needs including housing, food, clothing, medical care, and education expenses. The Alaska Child Support Services Division (CSSD) enforces these obligations statewide, collecting approximately $137 million in child support payments annually across roughly 41,000 cases.

The child support end date in Alaska is typically calculated to the last day of the month in which the child turns 18. If your child turns 18 on March 15, your obligation continues through March 31 of that year. Payments do not automatically stop. The obligor parent must file a motion to terminate or modify the support order, or the custodial parent must agree to close the case through CSSD. Failing to take action can result in continued wage garnishment and the accumulation of arrears even after the child reaches majority.

Alaska courts calculate child support using Civil Rule 90.3, which applies a percentage-of-income model. For one child, the obligor pays 20% of adjusted annual income. For two children, the rate increases to 27%. Three children require 33%, and each additional child adds 3% to the obligation. The rule includes a low-income adjustment that provides a $7,500 standard deduction from gross annual income, ensuring that low-earning parents retain enough income to meet their own basic needs.

The High School Exception: Support Until Age 19

Alaska extends child support obligations to age 19 when the child is unmarried and still pursuing a high school diploma or equivalent vocational training while residing with the custodial parent or a designee under AS 25.27.060. This high school exception ensures that children who have not yet graduated are not left without financial support during their final year of secondary education. The extension applies automatically if the conditions are met, though the obligor parent may challenge whether the child qualifies.

The high school extension requires three simultaneous conditions: the child must be unmarried, the child must be actively enrolled in and attending high school or an equivalent vocational program, and the child must be living with the custodial parent or that parent's designee. If any one of these conditions ceases to apply, the support obligation terminates. A child who drops out of school at age 18 and 6 months, for example, would no longer qualify for the extension. Similarly, a child who moves out of the custodial parent's home to live independently would lose the benefit of extended support.

When does child support end in Alaska for a child who graduates early? If the child completes high school at age 17, the support obligation continues until age 18. The high school exception only extends the obligation beyond 18. It does not shorten it. Graduation before 18 does not terminate the support duty because AS 25.20.010 sets 18 as the baseline age of majority.

Early Termination: Events That End Child Support Before Age 18

Alaska law recognizes several events that terminate child support obligations before the child reaches age 18 under 15 AAC 125.873. These events reflect circumstances where the child is no longer dependent on parental financial support or where the parent-child relationship has been legally altered.

Child support ends early in Alaska when any of the following occurs:

• The child dies, which immediately extinguishes the support obligation
• The child marries, which constitutes legal emancipation under Alaska law
• The child enlists in the active-duty United States military
• The child is legally emancipated by court order under AS 09.55.590
• Parental rights are terminated through adoption or other legal proceedings
• The child becomes self-supporting and the court finds continued support unnecessary

Emancipation in Alaska requires a court petition. A minor who is at least 16 years old may petition for emancipation by demonstrating financial self-sufficiency, the ability to manage personal affairs, and that emancipation serves the minor's best interests. Emancipation is not automatic upon the child obtaining employment or moving out of the family home. The court must issue a formal order.

Postmajority Support: The Disability Exception

Alaska courts may order child support beyond age 18 or 19 for adult children who cannot support themselves due to a physical or mental disability under AS 25.24.140(a). This is the only circumstance in which an Alaska court can order postmajority support without the agreement of both parents. The disability must render the adult child unable to be self-supporting, and the court evaluates each case individually based on the severity of the disability and the child's capacity for independence.

Postmajority disability support has no automatic end date. The obligation continues until the court modifies or terminates the order, typically upon a showing that the adult child's circumstances have changed. The obligor parent bears the burden of filing a motion to modify, supported by evidence that the adult child has gained the ability to support themselves or that other circumstances warrant termination of the order.

Alaska does not permit courts to order parents to pay for college or postsecondary education expenses. Unlike states such as New York or New Jersey, which allow courts to order educational support through age 21 or beyond, Alaska limits postmajority support to the disability exception. Parents may voluntarily agree to pay college costs as part of a divorce settlement, and such agreements are enforceable as contract terms, but a judge cannot impose this obligation absent parental consent.

How Alaska Calculates Child Support Under Rule 90.3

Alaska Civil Rule 90.3 sets child support at 20% of the obligor's adjusted annual income for one child, 27% for two children, and 33% for three children under the primary custody formula. Each additional child beyond three adds 3% to the percentage. The rule was last amended on October 16, 2023, and remains in effect as of March 2026. Pending legislation (SB 46) would codify these same percentages into AS Chapter 25.28 while repealing Rule 90.3.

Adjusted annual income includes wages, salaries, commissions, bonuses, self-employment income, rental income, dividends, interest, Social Security benefits, workers' compensation, unemployment insurance, and military allowances. Allowable deductions include federal and state taxes, Social Security contributions, mandatory retirement contributions, union dues, and support obligations for prior children from other relationships.

The shared custody formula applies when each parent has physical custody for at least 110 overnights per year, which represents approximately 30% of the time. Under shared custody, each parent's theoretical support obligation is calculated, then multiplied by the percentage of time the other parent has custody. The parent with the higher obligation pays the difference multiplied by 1.5. This multiplier accounts for the reality that many fixed costs (housing, utilities, transportation) do not decrease proportionally when a child splits time between two homes.

A court may deviate from the Rule 90.3 calculation by up to 5% without making specific findings. Deviations greater than 5% require the court to make written findings that the standard calculation is unjust or inappropriate based on factors including the child's unusual needs, the obligor's unusually high or low income, or significant assets held by the child.

How to Modify or Terminate Child Support in Alaska

Alaska parents seeking to end or modify child support must file a motion with the Superior Court and pay a $75 filing fee under Alaska Court Rules. Either parent may request modification by demonstrating a material change in circumstances under AS 25.27.190. CSSD also conducts administrative reviews every three years or upon request if circumstances have changed by at least 15%.

The modification process follows these steps:

1. Obtain Form DR-300 (Motion to Modify Child Support) from the Alaska Court System website at courts.alaska.gov
2. Complete the form with current financial information for both parents
3. File the motion with the Superior Court clerk and pay the $75 fee
4. Serve the other parent with a copy of the filed motion
5. Attend the hearing, where the court will recalculate support under Rule 90.3
6. Receive the modified order, which takes effect from the date of filing (not the date of the changed circumstance)

Material changes that justify modification include job loss, significant income increase or decrease of 15% or more, changes in custody arrangements, the child's changing medical needs, or the birth of additional children. A modification request based on the obligor's voluntary unemployment or underemployment may result in the court imputing income based on earning capacity rather than actual earnings.

To terminate support when the child reaches age 18 (or 19 under the high school exception), the obligor parent should file a motion to terminate with the court. While the obligation ends by operation of law at the specified age, the wage withholding order does not stop automatically. Filing the motion ensures that the employer and CSSD receive notice to cease wage garnishment. Parents who fail to file may continue having wages garnished until administrative or judicial action terminates the income withholding.

Arrears: What Happens to Unpaid Child Support After the Child Ages Out

Unpaid child support in Alaska does not expire when the child turns 18 or 19, and the state may collect arrears indefinitely under AS 25.27.226. Alaska has no statute of limitations on child support arrears collection. The Alaska CSSD uses multiple enforcement tools including wage garnishment (up to 50% of disposable income for parents with other dependents, 60% without), federal and state tax refund interception, Permanent Fund Dividend (PFD) garnishment, professional license suspension, passport denial for arrears exceeding $2,500, and property liens.

PFD garnishment is a particularly powerful enforcement tool unique to Alaska. The state may intercept the obligor's annual Permanent Fund Dividend to apply toward child support arrears. In 2025, the PFD was $1,702 per eligible resident. Obligors with child support debt may lose their entire PFD until the arrears balance is satisfied. This garnishment occurs automatically through CSSD and does not require a separate court order.

Arrears accrue interest at the statutory rate, which compounds the total debt over time. An obligor who owes $10,000 in arrears and fails to make payments will see that balance grow through interest charges even after the child has reached the age of majority. The only way to reduce or eliminate arrears is through payment, through a court-ordered modification applied retroactively to the date of filing (not before), or through a negotiated settlement with CSSD.

Alaska Residency and Filing Requirements for Divorce

Alaska requires no minimum residency period to file for divorce, making it one of the most accessible jurisdictions in the United States for initiating divorce proceedings under AS 25.24.090. The filing spouse must be a resident of Alaska at the time of filing, which means physical presence in the state with the intent to remain indefinitely. Military service members stationed in Alaska for at least 30 days qualify as residents for divorce filing purposes.

The filing fee for divorce in Alaska is $250 in Superior Court as of March 2026. Verify with your local clerk. A fee waiver is available for individuals whose income falls at or below 125% of the federal poverty guidelines by filing Form TF-920. Alaska recognizes both divorce (fault-based) and dissolution (no-fault, by agreement), though the vast majority of cases proceed as no-fault divorces based on incompatibility of temperament under AS 25.24.050.

Alaska divides marital property under equitable distribution principles, meaning the court divides assets fairly but not necessarily equally. Child support orders are part of the overall divorce decree or may be established separately through CSSD. When does child support end in Alaska following a divorce? The same rules apply: age 18 standard, age 19 with the high school exception, and indefinite for disabled adult children.

Pending Legislation: SB 46 and the Future of Alaska Child Support

Senate Bill 46, introduced in the 34th Alaska Legislature (2025-2026 session), would repeal Civil Rule 90.3 and codify child support calculations into new Alaska Statutes Chapter 25.28. The bill preserves the same percentage-of-income formula currently used under Rule 90.3, maintaining the 20%/27%/33%/+3% structure. The primary change is jurisdictional: moving child support guidelines from court-adopted rules to legislatively enacted statutes.

This shift matters because court rules can be amended by the Alaska Supreme Court without legislative approval, while statutes require the full legislative process to change. SB 46 would give the legislature direct control over child support calculation methods. The bill characterizes the Rule 90.3 repeal as substantive, meaning it takes effect even without a two-thirds majority vote. As of March 2026, SB 46 remains in committee and has not yet been enacted.

Parents with existing child support orders should not expect immediate changes if SB 46 passes. The bill preserves the current calculation methodology, so support amounts calculated under Rule 90.3 and under the proposed Chapter 25.28 would be identical. The practical impact would be felt in future legislative sessions, where changes to child support formulas would require statutory amendments rather than court rule changes.

Frequently Asked Questions

At what age does child support end in Alaska?

Child support in Alaska ends at age 18 under AS 25.27.060. The obligation extends to age 19 if the child is unmarried, still in high school or equivalent vocational training, and living with the custodial parent. Support for disabled adult children under AS 25.24.140(a) has no automatic end date.

Does child support automatically stop at 18 in Alaska?

Child support does not automatically stop at 18 in Alaska. The legal obligation ends, but wage garnishment continues until the obligor files a motion to terminate with the Superior Court. Filing the $75 motion ensures CSSD and the employer receive notice to stop withholding. Without this step, garnishment may continue indefinitely.

Can child support continue past 18 in Alaska if my child goes to college?

Alaska courts cannot order parents to pay for college expenses or extend child support for postsecondary education. Unlike New York or New Jersey, Alaska limits postmajority support to the disability exception under AS 25.24.140(a). Parents may voluntarily agree to college support in a divorce settlement, which is enforceable as a contract.

How is child support calculated in Alaska?

Alaska calculates child support under Civil Rule 90.3 using a percentage-of-income model: 20% for one child, 27% for two, and 33% for three children. A parent earning $60,000 adjusted annual income with one child would owe $1,000 per month. A $7,500 low-income deduction applies to protect low-earning obligors.

What happens to unpaid child support when my child turns 18 in Alaska?

Unpaid child support arrears in Alaska survive indefinitely with no statute of limitations under AS 25.27.226. CSSD enforces collection through wage garnishment (up to 50-60% of disposable income), PFD interception ($1,702 in 2025), tax refund seizure, license suspension, and passport denial for arrears over $2,500.

Can I modify child support in Alaska if I lose my job?

Job loss qualifies as a material change in circumstances for child support modification under AS 25.27.190. File Form DR-300 with the Superior Court and pay the $75 fee. The modification takes effect from the filing date, not the date of job loss, so file promptly. Courts may impute income if the unemployment is voluntary.

Does Alaska require a waiting period for divorce?

Alaska has no mandatory waiting period for uncontested dissolutions. Contested divorces proceed on the court's schedule, which typically takes 6 to 12 months depending on complexity. Alaska also has no minimum residency period under AS 25.24.090, requiring only that the filer be a current Alaska resident.

What is the shared custody child support formula in Alaska?

Alaska's shared custody formula under Rule 90.3 applies when each parent has at least 110 overnights per year (approximately 30% of the time). Each parent's support obligation is calculated, multiplied by the other parent's custody percentage, and the difference is multiplied by 1.5. The parent with the higher figure pays the net amount.

Can a child be emancipated early in Alaska to end child support?

Alaska allows minors aged 16 or older to petition for emancipation under AS 09.55.590. The minor must demonstrate financial self-sufficiency and the ability to manage personal affairs. Court-ordered emancipation terminates the child support obligation. Marriage and active-duty military enlistment also constitute emancipation events.

Does child support cover health insurance in Alaska?

Alaska child support orders typically include a provision for health insurance coverage under Rule 90.3. The court may order either parent to maintain existing employer-sponsored health coverage for the child. The cost of health insurance premiums is factored into the support calculation as an adjustment to the obligor's income.