Ohio Child Support Calculator

How is Child Support Calculated in Ohio?

Ohio calculates child support by combining both of your incomes to determine a basic support amount from a state schedule, as if you were still living together. This total obligation, governed by Ohio Revised Code § 3119, is then divided between you based on your percentage share of the combined income.

Ohio Child Support Guideline Factors

In Ohio, a shared parenting plan can lead to a deviation from the standard child support calculation. Under Ohio Revised Code § 3119.231, if a parent has extended parenting time, often defined as 147 or more overnights per year, courts may grant a 10% reduction in their annual support obligation. The exact adjustment is at the court's discretion but is common with substantially equal parenting time.

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✓ Verified for 2026 Guidelines • Reviewed October 2026 by Harmoney

Ohio Child Support Guidelines at a Glance

Guideline Model Income Shares Model
Governing Legal Authority Ohio Revised Code § 3119
Shared Custody Threshold 147 Overnights (10% Credit)
Age Support Ends Age 18 (or 19 if in High School)
Modification Standard 10% Change in Support Amount

Frequently Asked Questions About OH Support


At what age does child support end in OH?

Child support in Ohio ends when a child turns 18 or graduates from high school, whichever is later, but not beyond age 19. This is specified in Ohio Revised Code § 3119.86, unless the child is disabled or the parents have a separate agreement for support to continue longer.

How is child support calculated if one parent is unemployed in OH?

If a parent is voluntarily unemployed or underemployed, Ohio courts will impute income to them based on their potential earning capacity. Under O.R.C. § 3119.01(C)(17), this determination is based on factors like the parent's prior employment, education, physical and mental abilities, and the local job market.

How do I modify a child support order in OH?

You can modify a child support order in Ohio if there is a substantial change of circumstances, which is presumed if the new calculated support amount changes by at least 10% from the existing order. Ohio Revised Code § 3119.79 governs the review and modification of child support orders.

Does OH child support cover college expenses?

No, Ohio law does not require parents to pay for college expenses unless they have voluntarily agreed to do so in a legally binding court order or separation agreement. The court's authority to order child support typically ends when the child reaches the age of majority.

How does OH handle health insurance and childcare costs?

Health insurance premiums and actual, reasonable work-related childcare costs are added to the basic support obligation and divided between the parents in proportion to their incomes. These expenses are treated as add-ons to the basic support calculated under the Ohio Revised Code § 3119 guidelines.