Child Support in Ohio: How It's Calculated
Ohio uses the Income Shares Model (ORC §3119) to determine child support obligations. This guide walks through how the formula works, what factors Ohio courts consider, and how to modify or enforce an order — with links to official Ohio resources.
Income Shares Model (ORC §3119) in Ohio
Ohio uses the Income Shares Model under Ohio Revised Code §3119. Both parents' gross incomes are combined and applied to the Ohio Child Support Schedule to determine a combined basic child support obligation, which is then allocated proportionally.
Ohio provides a parenting time credit when the non-residential parent has 90 or more overnights per year (approximately 24.7%). Above 147 overnights, the shared parenting calculation applies. Ohio's guidelines were updated in 2019 to include a broader and more nuanced parenting time adjustment that gradually increases the credit as overnights increase, rather than applying a sudden adjustment at one threshold.
Key Factors Ohio Courts Consider
- Both parents' gross annual income (annualized and divided to monthly for calculation)
- Number of children
- Parenting time overnights — 90+ nights triggers a credit; 147+ nights for shared parenting
- Child's health insurance premium
- Work-related childcare costs
- Any extraordinary expenses for the child
- Prior support obligations
Official Ohio Resources
Get an accurate number from an official source
Child support calculations are complex and fact-specific. For an accurate figure, use Ohio's official worksheet or consult a licensed family law attorney. This guide explains the framework — it does not produce a binding calculation.
Step-by-Step: How Ohio's Formula Works
Here is how Ohio applies the Income Shares Model (ORC §3119) to calculate a child support obligation, step by step:
1. Determine each parent's income
Ohio starts by calculating each parent's income — gross income (before taxes). The specific definition of income is set by Income Shares Model (ORC §3119).
2. Combine incomes and find the basic obligation
Both parents' incomes are combined and compared to Ohio's child support schedule. The schedule produces a basic child support obligation based on combined income and the number of children.
3. Add health insurance and childcare costs
Health insurance premiums paid for the child and work-related childcare expenses are added to the basic obligation before it is divided between parents.
4. Divide proportionally based on income share
The total obligation is allocated between the parents in proportion to each parent's share of combined income. The parent with the higher income share bears a larger portion of the obligation.
5. Apply parenting time credits
Parenting time overnights — 90+ nights triggers a credit; 147+ nights for shared parenting parenting time credit when the non-residential parent has 90 or more overnights per year (approximately 24.
Document Everything for Your Ohio Case
Ohio courts rely on documented records — parenting time logs, expense receipts, and payment histories. ReplyCalmly helps you track all of it and generate organized, exportable reports.
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