Alaska Child Support Calculator

Alaska calculates child support under Civil Rule 90.3 using a percentage-of-income model applied to the noncustodial parent's adjusted annual income. The standard percentages are 20% for one child, 27% for two children, 33% for three children, and 3% additional for each child beyond three. Adjusted income equals total income minus mandatory deductions for taxes, Social Security, Medicare, and retirement contributions.

Alaska Rule 90.3 uses the noncustodial parent's adjusted annual income, which includes wages, salaries, commissions, bonuses, self-employment income, and investment income. Mandatory deductions include federal and state taxes, Social Security, Medicare, union dues, and mandatory retirement. Voluntary retirement contributions are deductible up to 7.5% of gross wages, and health insurance premiums up to 10% of total income.

In primary custody cases (one parent has the child over 70% of the time), Alaska calculates support based solely on the noncustodial parent's income. In shared custody — where each parent has at least 30% of overnights (110 nights per year) — the court calculates each parent's hypothetical obligation and offsets based on actual time-sharing percentages, typically resulting in a lower net payment.

Alaska child support orders can be modified upon showing a material change in circumstances. Common qualifying changes include a 15% or greater change in income, addition of a new child, or a custody arrangement change. The Child Support Services Division (CSSD) handles administrative order modifications, while court orders require judicial modification. Support cannot be modified retroactively, so parents should file promptly when circumstances change.

Alaska's Rule 90.3 child support formula covers basic needs including housing, food, clothing, and transportation. Healthcare costs for the child, childcare expenses, and educational costs may be ordered separately or factored into a deviation from the guidelines. The court may also consider extraordinary expenses such as special needs, travel costs for visitation, and extracurricular activities when determining whether to deviate from the standard percentage.

Alaska sets a mandatory minimum child support of $50 per month ($600 per year) under Rule 90.3(c)(3), even for unemployed or incarcerated parents. The maximum is effectively capped at the standard percentage applied to $138,000 in adjusted annual income — for one child, that's $27,600 per year ($2,300 per month). Income above $138,000 is excluded unless the court finds additional support is just and proper.

Alaska child support continues until the child turns 18, or until age 19 if the child is still attending high school and living with the custodial parent. Support may extend beyond these ages for children with special needs, potentially continuing throughout the child's life. Emancipation events such as marriage, military enlistment, or court-ordered emancipation can also terminate the obligation early.

Alaska enforces unpaid child support through multiple mechanisms including wage withholding, tax refund interception, and seizure of Permanent Fund Dividend payments. Criminal nonsupport is a class A misdemeanor under Alaska law, escalating to a class C felony in serious cases. Past-due support cannot be discharged in bankruptcy and must be paid from the obligor's estate upon death. The Child Support Services Division (CSSD) administers all enforcement actions.