Alaska child support calculator

Percentages

20% for 1 child, 27% for 2, 33% for 3, plus 3% for each additional child

The non-custodial parent’s adjusted annual income is multiplied by 20% for one child, 27% for two, 33% for three, and 3 more percentage points for each additional child.^[1]

Official text · Alaska Civil Rule 90.3(a)(2)

“(A) 20% (.20) for one child; (B) 27% (.27) for two children; (C) 33% (.33) for three children; and (D) an extra 3% (.03) for each additional child.”

Income counted

Adjusted annual income: total income minus taxes and listed deductions

Income is the parent’s total income from all sources minus mandatory deductions (income, Social Security and Medicare taxes, mandatory union dues and retirement contributions) and other listed items such as capped voluntary retirement contributions, support for prior children, work-related child care and capped health and life insurance premiums.^[1]

Official text · Alaska Civil Rule 90.3(a)(1)

“Adjusted annual income as used in this rule means the parent’s total income from all sources minus: (A) mandatory deductions such as: (i) federal, state, and local income tax, (ii) Social Security tax or the equivalent contribution to an alternate plan established by a public employer, and self-employment tax, (iii) medicare tax,”

Shared parenting time

At least 30% (but no more than 70%) of the year; cross-calculation × 1.5

Shared physical custody means the children live with a parent 30 to 70 percent of the year; each parent’s primary-custody amount is multiplied by the other parent’s custody share, the larger figure minus the smaller is multiplied by 1.5, and the result may not exceed the primary-custody amount.^[1]

Official text · Alaska Civil Rule 90.3(b)(1) and (f)(1)

“A parent has shared physical custody (or shared custody) of children for purposes of this rule if the children reside with that parent for a period specified in writing in the custody order of at least 30, but no more than 70, percent of the year, regardless of the status of legal custody.”

Top of the guidelines

Adjusted annual income over $138,000 not covered by the formula

The percentage formula does not apply to adjusted annual income above $138,000; the court may add support above that only if it is just and proper.^[1]

Official text · Alaska Civil Rule 90.3(c)(2)

“Paragraph (a) does not apply to the extent that the parent has an adjusted annual income of over $138,000. In such a case, the court may make an additional award only if it is just and proper,”

Minimum order

$50 per month ($600 per year)

The lowest child support amount that may be ordered is $50 a month, apart from the extended-visitation credit and shared-custody calculations.^[1]

Official text · Alaska Civil Rule 90.3(c)(3)

“The minimum child support amount that may be ordered is $50 per month ($600 per year) except as provided in subparagraph (a)(3) and paragraph (b).”

Low income

Total income $30,000 or less: income minus $7,500 if lower

For a parent whose total annual income is $30,000 or less, adjusted income is the lower of the normal adjusted figure or total income minus $7,500.^[1]

Official text · Alaska Civil Rule 90.3(a)(5)

“For a parent who has a total annual income of $30,000 or less, the parent’s adjusted annual income from all sources is the lesser of the following amounts: (A) the amount calculated under items (a)(1)(A) – (G) above; or (B) the parent’s total income from all sources minus $7,500.”

Guideline: Alaska Civil Rule 90.3, Child Support Awards (Alaska Court System, Rules of Civil Procedure), checked October 26, 2026.