Child support · AK
Alaska child support calculator
Civil Rule 90.3 worked through: a court rule rather than a statute, written in annual figures, with its own definition of shared custody.
Rules read on official Alaska pages on · Checked by Radif Partners · How we calculate
- Model
- Percentage of payer income
- Income counted
- Net income
- Shared parenting
- From 110 overnights
- 1 child, $5,000 / $3,000
- $1,000
- a month
Under Alaska Civil Rule 90.3, a parent with $5,000 a month of adjusted income owes $1,000 a month for one child, since the rule takes 20% of the noncustodial parent's adjusted annual income for one child, 27% for two, 33% for three and 3% more for each additional child. Adjusted income is total income minus income taxes, Social Security and Medicare, mandatory union dues and retirement contributions, prior support orders, work-related child care and a few capped items. Only the first $138,000 a year counts automatically, so a parent at $15,000 a month pays $2,300 for one child unless the court finds more is just. The floor is $50 a month. When the children live with each parent at least 30% of the year, about 110 overnights, a separate shared custody formula replaces the percentage.
Guideline child support in Alaska, per month
$1,000
$12,000 a year
| Obligor’s adjusted income, a month | $5,000 |
| Rule 90.3 percentage, 1 child | 20.0% |
Estimate under the Alaska guideline as published, from the incomes you enter. Deviations, imputed income, other children and the judge's findings can change the order. How this is calculated.
A Supreme Court rule, counted by the year
Alaska's guideline is not in the statutes. It is Civil Rule 90.3, adopted by the Alaska Supreme Court and amended by court order, most recently with effect from October 2023, and the Legislature can override it. The rule works in annual amounts: it multiplies a year of adjusted income by the percentage and then spreads the result over twelve installments. Our calculator takes monthly figures and divides back.
The deductions are listed and several are capped. Voluntary retirement savings count only while mandatory and voluntary contributions together stay under 7.5% of total income. The parent's own health, dental and vision premiums are limited to 10% of income, and life insurance naming the children or the other parent to $1,200 a year.
Shared custody starts at 110 overnights
A parent has shared physical custody when the order gives him or her the children between 30% and 70% of the year; the commentary converts the lower bound to 110 overnights, and a daytime visit does not count. Each parent's primary-custody amount is multiplied by the other parent's share of time, the two are netted, and the difference is raised by 1.5 for the cost of two homes, without ever exceeding what the payer would owe with no shared time.
Take parents with $80,000 and $40,000 of adjusted income a year and two children. At 109 nights the higher earner pays $1,800 a month. At 146 nights, a 60/40 split, the order drops to $1,080; at an even split, $681. The order must warn that failing to exercise enough custody is a ground to modify it.
Floors, ceilings and the low-income step
The $600 annual minimum means a parent with $150 a month of adjusted income still owes $50. A second protection sits in the income definition: a parent whose total income is $30,000 a year or less may count total income minus $7,500 if that is lower than the regular adjusted figure. Because the calculator receives adjusted income, apply that comparison yourself before entering the amount.
Health insurance for the children is split evenly unless the court orders otherwise. A payer at $5,000 who carries a $300 premium sees the order fall from $1,000 to $850; four children at the same income would cost $1,800 before that credit. Extended summer visits of more than 27 consecutive days can earn a credit of up to 75% for that period, which the order must spell out in advance. The Hawaii page shows an income-shares state for comparison, and the main calculator covers the rest of the country.
The Alaska guideline this calculator applies
| Rule | Alaska |
|---|---|
| Model | Percentage of the non-custodial parent's adjusted annual income (Alaska Civil Rule 90.3(a)) |
| Income counted | Net income: after income taxes and mandatory deductions, as the state defines it. |
| Percentages | 1 child: 20% · 2 children: 27% · 3 children: 33% |
| Income cap | $138,000 a year (paying parent) |
| Shared parenting | Cross-credit formula from 110 overnights a year, basic amount × 1.5 |
Monthly support for one paying parent, the other parent without income
| Paying parent’s monthly income | 1 child | 2 children | 3 children | 4 children |
|---|---|---|---|---|
| $2,000 | $400 | $540 | $660 | $720 |
| $3,000 | $600 | $810 | $990 | $1,080 |
| $4,000 | $800 | $1,080 | $1,320 | $1,440 |
| $5,000 | $1,000 | $1,350 | $1,650 | $1,800 |
| $6,000 | $1,200 | $1,620 | $1,980 | $2,160 |
| $8,000 | $1,600 | $2,160 | $2,640 | $2,880 |
| $10,000 | $2,000 | $2,700 | $3,300 | $3,600 |
| $12,500 | $2,300 | $3,105 | $3,795 | $4,140 |
| $15,000 | $2,300 | $3,105 | $3,795 | $4,140 |
| $20,000 | $2,300 | $3,105 | $3,795 | $4,140 |
How the amount is set. Annual support = non-custodial parent's adjusted annual income (up to $138,000) x 20% for one child, 27% for two, 33% for three, plus 3% for each additional child (Civil Rule 90.3(a)(2), (c)(2)); minimum $50 per month ($600 per year) (90.3(c)(3)). source
Income. Adjusted annual income = total income from all sources minus: federal, state and local income tax; Social Security (or equivalent public-employer plan) and self-employment tax; Medicare tax; mandatory union dues; mandatory retirement contributions; voluntary tax-deferred retirement contributions (mandatory + voluntary capped at 7.5% of total income); child or spousal support paid for prior children / former spouses under other orders; in-kind support for prior children in the parent's primary or shared custody; work-related child care for the children of the order; the parent's own health, dental and vision premiums (capped at 10% of total income); life insurance premiums for the children or obligee (capped at $1,200 a year) (Civil Rule 90.3(a)(1)(A)-(G)).
Parenting time. Shared physical custody = children reside with the parent at least 30% but no more than 70% of the year under the custody order (90.3(f)(1)); the commentary counts overnights: 30% of a year = 110 overnights. Reciprocal 90.3(a) amounts are weighted by the other parent's custody share, offset, and the difference is multiplied by 1.5, capped at the primary-custody amount (90.3(b)(1)).
Child care and health care. Work-related child care for the children of the order is deducted from the paying parent's income rather than added to support (90.3(a)(1)(E)). The court requires health insurance if available at reasonable cost (presumed reasonable up to 5% of the purchasing parent's adjusted annual income); its cost is split equally unless ordered otherwise, by decreasing or increasing the support amount; uncovered health care expenses are split equally (90.3(d)(1)-(2)). Reasonable travel expenses for visitation are allocated after support is set (90.3(g)).
Low incomes. For a parent with total annual income of $30,000 or less, adjusted annual income is the lesser of the normal calculation or total income minus $7,500 (90.3(a)(5)). The minimum order is $50 per month ($600 per year), except for extended-visitation credits and shared custody (90.3(c)(3)).
The state also runs its own official child support calculator; use it, or the court's worksheet, for a filing.
Worth knowing in Alaska
- Alaska's guideline is a court rule adopted by the Supreme Court (Civil Rule 90.3), not a statute, and may be superseded by legislation. source
- A parent may get up to a 75% reduction of support for any extended visitation of more than 27 consecutive days (90.3(a)(3)). source
- A change of more than 15% in recalculated support is presumed to be a material change of circumstances allowing modification (90.3(h)(1)). source
- Potential income may not be imputed to a parent caring for a child under two years old of the parties, or to a physically or mentally incapacitated parent (90.3(a)(4)(E)). source
- The IV-D agency is the Child Support Enforcement Division (CSED) of the Department of Revenue; its ACSESS case system went live October 6, 2025, and its client portal includes a support estimator. source