Home› Child Support› Indiana Child Support Calculator

Indiana Child Support Calculator

Estimate IN guideline child support under the income shares model (IC 31-16-6 / Indiana Rule 31). Uses weekly adjusted gross income — both parents' incomes determine the basic obligation. Includes healthcare, childcare, and parenting time credit for 93+ overnights.

Updated April 2026 IC 31-16-6 / Indiana Rule 31 Private — runs in your browser
$
Non-custodial parent weekly gross (IC 31-16-6)
$
Custodial parent weekly gross income
Indiana Child Support (Guideline)
$1,503/mo
Combined Weekly$2,010/wk
Basic Weekly Obligation$402/wk
Obligor Share63.2%
Weekly Support$347/wk
Indiana uses weekly adjusted gross income in the guideline schedule (IC 31-16-6). Both parents' incomes determine the basic obligation — obligor pays their proportionate share.
Advanced Calculator

Income shares visualization, parenting time credit analysis at multiple overnight schedules, and 10-year year-by-year projection with income growth.

+ Open Advanced Calculator
Indiana Inputs (Annual)
$
$
$
$
Indiana Child Support (Income Shares)
$1,503/mo
Combined Weekly$2,010/wk
Basic Weekly Obligation$402/wk
Obligor Share63.2%
Weekly Base Support$254/wk
Income Shares Split
Obligor 63% ($1,270/wk)Obligee 37% ($740/wk)Obligor pays this shareObligee's share
Basic Weekly Obligation (2 children): $402/wk = $1,742/mo
Monthly Support vs Obligee Weekly Income
$400/wk$1,101/mo$600/wk$1,101/mo$800/wk$1,101/mo$1000/wk$1,101/mo$1400/wk$1,101/mo$1800/wk$1,034/mo$2400/wk$865/mo
Higher obligee income → obligor pays less (income shares model)
Professional Simulator

Full income breakdown for both parents, all IC 31-16-6 adjustments, parenting time financial impact, what-if income scenarios, and lifetime NPV projection.

+ Open Professional Simulator
Obligor Income — Annual: $66,040 | Weekly: $1,270
$
$
$
$
Obligee Income — Annual: $38,480 | Weekly: $740
$
$
Children & Weekly Adjustments
$
$
$
$
Indiana Professional Child Support Analysis
$1,503/mo
Income Shares Calculation
Obligor weekly: $1,270/wk
Obligee weekly: $740/wk
Combined: $2,010/wk
Basic obligation: $402/wk
Obligor share: 63.2% = $254/wk
Weekly Adjustments (Obligor Share)
Healthcare: +$35/wk
Childcare: +$58/wk
Monthly total: $1,503/mo
% of Combined Weekly17.3%
Annual Obligation$18,038/yr

How Indiana Child Support Works

Indiana uses the Income Shares Model under Indiana Code §31-16-6 and Indiana Child Support Rule 31. The guidelines use weekly adjusted gross income for both parents — a distinctive feature compared to states that use monthly figures. Both parents' incomes are combined, the basic obligation is determined from the guideline schedule, and each parent contributes their proportionate share.

Indiana Income Shares Formula

Both parents' weekly adjusted gross incomes are added together. The court looks up the basic weekly child support obligation from the Indiana guideline schedule, then allocates the obligation based on each parent's income percentage. The obligor (non-custodial parent) pays their share to the obligee.

Combined Weekly AGI = Obligor Weekly AGI + Obligee Weekly AGI
Basic Weekly Obligation = IN Schedule Lookup (Combined Weekly AGI, # Children)
Obligor Share = Obligor Weekly AGI ÷ Combined Weekly AGI
Obligor Payment = Basic Obligation × Obligor Share + Adjustments (Health, Childcare, Education)

Adjustments to Basic Support

Parenting Time Credit (Indiana Rule 31)

When the non-custodial parent has 93 or more overnights per year (approximately 25%), Indiana Rule 31 provides a parenting time credit that reduces the support obligation. The credit recognizes the direct costs the obligor bears while the children are in their care. The credit increases gradually with more overnights. Courts have discretion in applying the credit based on actual costs.

Worked Example

Obligor earns $1,270/week gross. Obligee earns $740/week gross. Two children. Standard parenting time.

Obligor Weekly Gross$1,270/wk
Obligee Weekly Gross$740/wk
Combined Weekly$2,010/wk
Basic Obligation (2 children, 20%)$402/wk
Obligor Share (63.2%)$254/wk
+ Healthcare (63.2% of $55/wk)+$35/wk
+ Childcare (63.2% of $92/wk)+$58/wk
Weekly Support$347/wk
Monthly Support (×52/12)$1,504/mo
Official Sources & Legal References

Frequently Asked Questions

Indiana IC §31-16-6-1 defines weekly gross income to include wages, salaries, commissions, bonuses, tips, self-employment income, unemployment benefits, workers' compensation, Social Security benefits, pensions, interest, dividends, and rental income. Certain deductions are allowed to reach "adjusted" gross income, including court-ordered support for other children, union dues, and health insurance premiums. Public assistance (SNAP, Medicaid) is excluded. Self-employed parents use gross receipts minus ordinary business expenses.
Indiana Rule 31 provides a parenting time credit when the non-custodial parent exercises 93 or more overnights per year (approximately 25% of nights). The credit reduces the guideline support amount to account for the direct costs the obligor incurs during their parenting time. The credit amount increases with more overnights but is capped. Courts have discretion to apply the credit differently based on the actual financial circumstances of each household. Below 93 overnights, standard support applies without reduction.
Indiana's child support guidelines use weekly adjusted gross income as the basis for the guideline schedule, which is a distinguishing feature of the Indiana system. Weekly income aligns with how most wage earners are paid and provides more precision for bi-weekly or weekly wage earners. To convert annual income to weekly: divide by 52. To convert monthly income to weekly: multiply by 12 then divide by 52 (or multiply by 0.2308). The resulting weekly support amount is then multiplied by 52 and divided by 12 to get the monthly payment amount.
Indiana allows modification of child support when there is a substantial change in circumstances. Under IC §31-16-8-1, a modification is presumed appropriate when the new calculated amount differs by more than 20% from the existing order. Significant income changes, changes in childcare costs, health insurance changes, or changes in parenting time are common triggers. Either parent may petition for modification. Indiana courts also apply a periodic review — the child support order can be reviewed upon request if there has been a substantial change since the last order.
Indiana sets a minimum child support order of $50 per week per child under IC §31-16-6-2. If the calculated guideline amount is below this minimum, the court generally orders the minimum amount. Courts may deviate from the minimum only in exceptional circumstances where deviation would be in the best interests of the child. Very low-income obligors may petition the court for a reduced amount with appropriate financial documentation, but courts are reluctant to order less than the statutory minimum.

When to Consult an Indiana Family Law Attorney

Consult an attorney if your case involves: disputed weekly adjusted gross income figures (self-employment, multiple income sources), contested parenting time credit eligibility near the 93-overnight threshold, modification based on the 20% variance rule under IC §31-16-8-1, or deviation requests from the IC §31-16-6-2 minimum support order.

Related Calculators

General Child Support
Income Shares model for all US states
Ohio Child Support
OH income shares — ORC §3119, 90+ overnights
Michigan Child Support
MI income shares with net income schedule
Illinois Child Support
IL income shares model
Shared Custody Calculator
How parenting time affects support amount
Modification Calculator
IN 20% threshold modification analysis
Not legal or financial advice. This calculator provides estimates based on published guidelines and formulas. Family law varies by jurisdiction and individual circumstances. Always consult a qualified attorney or financial advisor before making decisions. Full disclaimer · Our methodology