Ohio Child Support Calculator

Estimate OH guideline child support under the income shares model (ORC §3119). Both parents' incomes determine the basic obligation. Includes healthcare, childcare, and shared parenting deviation for 90+ overnights.

Updated April 2026 Ohio Revised Code §3119 Private — runs in your browser

Obligor Monthly Gross Income

Non-custodial parent gross income

Obligee Monthly Gross Income

Custodial parent gross income

Number of Children

Ohio Child Support (Guideline)

$1,858/mo

Combined Gross$8,700/mo

Basic Obligation$2,219/mo

Obligor Share63.2%

Ohio uses income shares — both parents' gross incomes determine the basic obligation. Obligor pays their proportionate share.

Advanced Calculator

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

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Ohio Inputs

Obligor Annual Gross Income

Obligee Annual Gross Income

Children

Healthcare Premium/mo

Work Childcare/mo

Ohio Child Support (Income Shares)

$1,794/mo

Combined Monthly$8,700/mo

Basic Obligation$2,219/mo

Obligor Share63.2%

Base Support$1,403/mo

Income Shares Split

Basic Obligation (2 children): $2,219/mo

Obligor Support vs Obligee Income

Higher obligee income → obligor pays less (income shares model)

Professional Simulator

Full income breakdown for both parents, all ORC §3119 adjustments, parenting time financial impact, what-if income scenarios, and lifetime NPV projection.

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Obligor Income — Annual: $65,000

Wages / Salary

Self-Employment Net

Bonuses

Rental / Other Income

Obligee Income — Annual: $38,400

Wages / Salary

Other Income

Children & Adjustments

Children

Healthcare Premium/mo

Work Childcare/mo

Cash Medical/mo

Private School/mo

Ohio Professional Child Support Analysis

$1,834/mo

Income Shares Calculation

Obligor gross: $5,417/mo

Obligee gross: $3,200/mo

Combined: $8,617/mo

Basic obligation: $2,197/mo

Obligor share: 62.9% = $1,381/mo

Adjustments (Obligor Share)

Healthcare: +$138/mo

Childcare: +$251/mo

Cash medical: +$63/mo

Total: $1,834/mo

% of Combined Gross21.3%

Annual Obligation$22,006/yr

How Ohio Child Support Works

Ohio uses the Income Shares Model under Ohio Revised Code §3119. Unlike percentage-of-income models, Ohio looks at both parents' gross incomes to determine a combined basic child support obligation, then apportions that obligation between the parents based on their relative incomes.

Ohio Income Shares Formula

The court combines both parents' gross incomes and looks up the basic child support obligation from the Ohio support schedule. Each parent then pays their proportionate share. The obligor (non-custodial parent) pays their share directly to the obligee.

Combined Gross = Obligor Gross + Obligee Gross
Basic Obligation = Ohio Schedule Lookup (Combined Gross, # Children)
Obligor Share = Obligor Gross ÷ Combined Gross
Obligor Payment = Basic Obligation × Obligor Share + Adjustments (Health, Childcare)

Adjustments to Basic Support

Health insurance: The cost of covering the children is added proportionally
Work-related childcare: Daycare and after-school costs are split by income share
Cash medical support: For uninsured medical expenses (minimum $387/year)
Extraordinary expenses: Special needs, private school (court discretion)

Shared Parenting Deviation (ORC §3119.231)

When the obligor has 90 or more overnights per year, the court may apply a shared parenting deviation that reduces the support amount. The deviation recognizes that the obligor bears direct child-rearing costs during their parenting time. Ohio courts have discretion in how much to reduce the amount.

Worked Example

Obligor earns $5,500/mo gross. Obligee earns $3,200/mo gross. Two children. Standard parenting time.

Obligor Gross$5,500/mo

Obligee Gross$3,200/mo

Combined Gross$8,700/mo

Basic Obligation (2 children)$2,219/mo

Obligor Share (63.2%)$1,402/mo

+ Healthcare (63.2% of $220)+$139/mo

+ Childcare (63.2% of $400)+$253/mo

Total Monthly Support$1,794/mo

Official Sources & Legal References

Frequently Asked Questions

What income counts for Ohio child support? ▼

Ohio ORC §3119.01 defines gross income broadly: wages, salaries, commissions, bonuses, overtime, tips, self-employment income, Social Security benefits, disability, unemployment, workers' compensation, pensions, interest, dividends, rental income, and most other recurring income. Means-tested public assistance (SNAP, Medicaid) is excluded. For self-employed parents, income is gross receipts minus ordinary and necessary business expenses.

When does the shared parenting deviation apply in Ohio? ▼

Ohio ORC §3119.231 allows a shared parenting deviation when the non-residential parent has 90 or more overnights per year (about 24.7% of nights). The court can reduce the guideline amount by considering the increased costs borne by the obligor during their parenting time. The reduction is not automatic — the court weighs the actual household expenses of both parents. Some counties apply a standard reduction; others require evidence of actual costs.

How does Ohio handle healthcare and childcare costs? ▼

Ohio adds healthcare insurance premiums and work-related childcare costs to the basic support obligation, then splits those costs proportionally by income. For example, if the obligor earns 60% of the combined income, they pay 60% of healthcare and childcare on top of their 60% share of the basic obligation. Ohio also mandates cash medical support (a minimum of $387/year) for uninsured medical expenses, split by income share.

Can Ohio child support be modified, and how often? ▼

Ohio allows modification when there is a substantial change in circumstances — typically when the new calculated amount differs by 10% or more from the existing order, or after 36 months if there is a difference of any amount. Common triggers include significant income change, loss of employment, change in custody, change in the children's needs, or a child reaching emancipation age. Ohio CSEA (child support enforcement agency) can request an administrative review every 36 months.

What is the minimum child support order in Ohio? ▼

Ohio sets a minimum support order of $80 per month per child, regardless of the obligor's income or the calculated guideline amount. If the calculated support would be below this threshold, the court still orders $80/month per child. Courts can deviate below the guideline only if a lower amount would not be unjust or inappropriate, and only if deviation is in the best interests of the child.

When to Consult an Ohio Family Law Attorney

This calculator produces estimates. Consult a licensed Ohio attorney if your case involves: shared parenting near the 90-overnight threshold, self-employment or business income (net vs. gross differences), cash medical support allocation disputes, or modification requests under the 10%/36-month rule (ORC §3119.79).