Co-Parenting Expense Rules in Ohio (2026)

If you are a divorced or separated co-parent in Ohio, understanding how the state divides child-related expenses is essential to protecting your finances and avoiding unnecessary conflict. Ohio uses an income-shares model governed by Ohio Revised Code (ORC) Chapter 3119, which means both parents contribute to child support based on their proportional share of combined income. This guide breaks down exactly how that works, what the law covers, and where the common disputes arise.

How Ohio Handles Shared Child Expenses

Ohio adopted the income-shares model of child support, which is based on the economic principle that children should receive the same proportion of parental income they would have received if the family had stayed together. Unlike percentage-of-income states such as Texas, where only the obligor's income determines support, Ohio looks at both parents' incomes to calculate a combined obligation and then splits it proportionally.

The framework operates through three primary mechanisms:

1. Basic child support obligation -- a monthly amount derived from the Ohio Basic Child Support Schedule (ORC 3119.021), which is based on the parents' combined gross income and the number of children.
2. Cash medical support -- a separate obligation covering out-of-pocket health care costs for the children (ORC 3119.30).
3. Add-on expenses -- work-related childcare and health insurance premiums, which are added to the basic obligation and split proportionally (ORC 3119.05).

Courts and Child Support Enforcement Agencies (CSEAs) use standardized worksheets to calculate these amounts. Ohio provides two worksheet types: one for sole or shared parenting arrangements (JFS 07768) and one for split parenting arrangements where each parent is the residential parent of at least one child (JFS 07769).

The calculation produces a specific dollar amount each parent owes. The residential parent is presumed to spend their share directly on the child. The non-residential parent (the obligor) pays their share to the residential parent through the Ohio Child Support Payment Central (OCSPC).

This income-shares approach means that a change in either parent's income can affect the support amount -- not just the obligor's income. That is a critical distinction from states that only look at the paying parent.

What Basic Child Support Covers

The Ohio Basic Child Support Schedule, codified at ORC 3119.021, is the foundation of every child support calculation in the state. The schedule is a table created by the Director of the Ohio Department of Job and Family Services (ODJFS) that lists combined annual gross income amounts in the left column (beginning at $8,400 and increasing in $600 increments up to $300,000) and the corresponding basic support obligation across columns for one through six children.

What the basic obligation includes

The basic child support obligation is intended to cover the child's share of ordinary living expenses, including:

• Housing (the child's share of rent or mortgage, utilities, and household maintenance)
• Food and groceries
• Clothing
• Basic transportation
• Ordinary entertainment and recreation
• Personal care items
• Basic school supplies

Like most states, Ohio does not require the receiving parent to itemize how basic support is spent. The amount is a single payment meant to approximate what the parents would have spent on the child in an intact household at their combined income level.

How the schedule works

The schedule is derived from economic data on what families at various income levels typically spend on children. As combined income rises, the absolute dollar amount increases, but the percentage of income devoted to child support decreases. This reflects the economic reality that higher-income families spend more on children in absolute terms but a smaller fraction of their total income.

For combined gross incomes exceeding $300,000 per year (the top of the schedule), the court has discretion to set support based on the schedule amount at $300,000 plus an additional amount that it considers appropriate given the family's standard of living and the child's needs.

Gross income definition

Under ORC 3119.01(C)(7), gross income for child support purposes includes virtually all income sources:

• Salaries, wages, and overtime
• Commissions, bonuses, and tips
• Self-employment income (net of ordinary and necessary business expenses)
• Rental and investment income
• Social Security benefits (excluding Supplemental Security Income)
• Workers' compensation benefits
• Unemployment compensation
• Pensions and retirement distributions
• Spousal support received
• Trust income
• Cash gifts and prizes of a recurring nature

Gross income does not include means-tested public assistance (such as TANF or food stamps), child support received for other children, or the income of a new spouse or partner.

Adjustments before the schedule is applied

Before looking up the combined obligation on the schedule, each parent's gross income is adjusted for:

• Local income taxes and FICA -- standard deductions are applied
• Pre-existing child support orders -- amounts paid under prior court orders for other children are subtracted
• Spousal support paid -- alimony paid to the other parent or a former spouse is subtracted
• Health insurance premiums -- the cost of maintaining health insurance for the children is deducted from the paying parent's income (this was a key change under HB 366, effective March 28, 2019)

These adjustments produce adjusted gross income for each parent. The adjusted gross incomes are combined, and the schedule is consulted to find the basic obligation for that combined income and number of children.

Health Care and Cash Medical Support

Ohio treats child health care as a distinct component of the support order, separate from the basic obligation. ORC 3119.30 requires that every child support order include provisions addressing health care for the children.

Health insurance allocation

When issuing or modifying a support order, the court must determine which parent will provide health insurance for the children. The analysis follows a priority structure:

1. If one parent has access to employer-sponsored or union-sponsored group health insurance that covers the children at a reasonable cost, that parent will typically be ordered to maintain coverage.
2. If both parents have access to group coverage, the court evaluates which plan offers better coverage at a more reasonable cost.
3. If neither parent has affordable group coverage, the court may order one parent to obtain private coverage or may factor health care costs into the cash medical support amount.

The cost of the health insurance premium attributable to the children (not the parent's own coverage) is credited against that parent's income when calculating support under ORC 3119.05. This means the parent carrying insurance effectively receives a dollar-for-dollar offset in the support calculation.

Cash medical support

ORC 3119.30 requires every child support order to include a cash medical support amount. This is a fixed amount intended to cover out-of-pocket medical expenses for the children, including copays, deductibles, coinsurance, and other expenses not covered by insurance.

The cash medical support amount is set by ODJFS based on data from the Medical Expenditure Panel Survey (MEPS). It reflects the average out-of-pocket health care spending for children with private insurance coverage. The amount is split between the parents in proportion to their income shares, just like the basic obligation.

Cash medical support is paid through the same collection system as basic support. If the children are Medicaid recipients, cash medical support may be redirected to the Ohio Department of Medicaid rather than to the custodial parent.

Uninsured and extraordinary medical expenses

For medical expenses that exceed the cash medical support amount -- such as orthodontia, surgery, therapy, or other significant out-of-pocket costs -- the court can issue a separate order under ORC 3119.05 requiring the parents to split these extraordinary costs. The split is typically proportional to each parent's income share, though courts have discretion to order a different allocation.

Many Ohio decrees include language requiring the parents to share uninsured medical expenses "in proportion to their respective incomes" or on a 50/50 basis. If your decree contains such language, it is an enforceable court order. A parent who refuses to pay their share of a documented uninsured medical expense can be held in contempt.

Practical tip: health expense documentation

Ohio courts expect parents to provide documentation when seeking reimbursement for uninsured medical expenses. Keep all Explanation of Benefits (EOB) statements, pharmacy receipts, provider invoices, and proof of payment. Many decrees require the parent seeking reimbursement to provide documentation within 30 days of incurring the expense and require the other parent to reimburse within 30 days of receiving documentation.

Childcare Costs

Work-related childcare is treated as an add-on expense in Ohio, meaning it is calculated separately from the basic obligation and added on top of it. ORC 3119.05(P)(1)(d) governs how childcare costs are handled in the support calculation.

The statutory framework

When either parent incurs childcare costs that are necessary to allow that parent to work, seek employment, or attend job training, those costs are added to the basic child support obligation and split between the parents in proportion to their income shares.

There are important limitations:

1. Work-related requirement -- the childcare must be necessary for employment or employment preparation. Childcare for personal convenience or social activities does not qualify.
2. Net of tax credits -- the childcare amount added to the obligation is reduced by any federal or state tax credits the parent receives for childcare expenses.
3. Statewide average cap -- the childcare cost included in the calculation cannot exceed the maximum statewide average childcare cost estimate established by ODJFS. If actual childcare costs exceed this cap, the excess may be addressed as a deviation factor under ORC 3119.23.

Reasonable and necessary standard

Ohio applies a reasonable and necessary standard to childcare expenses. This means the court evaluates whether the type and cost of childcare are appropriate given the circumstances. Factors include:

• The child's age and needs
• The parent's work schedule
• Local childcare market rates
• Whether the parent has reasonable alternatives (such as family members)

A parent who enrolls a child in a premium childcare program costing significantly more than local market rates may find that the court caps the amount included in the support calculation at a more typical rate.

Example: childcare add-on

If annual work-related childcare costs $8,000 (net of tax credits), and Parent A earns 64% of the combined income while Parent B earns 36%, the childcare cost is allocated as follows:

• Parent A's share: $8,000 x 64% = $5,120 per year
• Parent B's share: $8,000 x 36% = $2,880 per year

This amount is added to each parent's share of the basic support obligation. If Parent B is the obligor, their total support payment increases by $2,880 per year (or $240 per month) on top of their basic obligation share.

Education Expenses

Ohio law does not automatically require parents to share private school tuition or educational expenses beyond what is covered by the basic child support obligation. Public education is presumed to be the baseline. However, there are several paths through which education costs can become part of a support order.

Private school as a deviation factor

Under ORC 3119.23, the court may deviate from the guideline child support amount if the standard calculation would be unjust or inappropriate. Private school tuition is a recognized basis for deviation. Courts consider:

• Whether the child attended private school before the separation or divorce
• Whether both parents previously agreed to private education
• The educational needs of the child
• Both parents' ability to pay
• Whether the standard of living during the marriage included private school

If the court finds that private school is in the child's best interest and both parents can reasonably afford it, the court may order the cost to be shared -- typically as a separate order under ORC 3119.05, not folded into the basic obligation.

Special needs education

For children with special educational needs that public schools cannot adequately address, the analysis is different. Under ORC 3119.23(D), the court may consider "extraordinary costs associated with caring for a child or children with specialized physical, psychological, or educational needs" as a deviation factor. If a child requires a specialized educational setting due to a documented disability or learning difference, the court is more likely to order both parents to share those costs.

College and post-secondary education

Ohio courts do not have statutory authority to order parents to pay for college or post-secondary education. Unlike some states (such as Indiana or New Jersey), Ohio's child support statutes do not extend to college tuition. Child support in Ohio terminates when the child reaches 18, or 19 if the child is still attending high school.

However, parents can voluntarily agree to share college costs, and such agreements can be incorporated into a separation agreement or divorce decree. Once incorporated into a court order, the agreement becomes enforceable.

Extracurricular Activities

Extracurricular activities -- sports leagues, music lessons, summer camps, travel teams -- are one of the most common sources of conflict between Ohio co-parents. The law provides limited automatic coverage for these costs.

The general rule

Extracurricular activity expenses are not automatically included in the basic child support obligation or the standard add-on calculations. The basic obligation covers ordinary recreation and entertainment, but organized extracurricular programs with registration fees, equipment costs, and travel expenses are considered discretionary.

This means that if your court order is silent on extracurriculars, neither parent is legally obligated to contribute to the other parent's decision to enroll the child in an activity. The parent who enrolls the child bears the full cost unless there is a specific agreement or court order to the contrary.

Court-ordered deviation for extracurriculars

A parent can request that the court include extracurricular costs as part of a deviation from guideline support under ORC 3119.23. The court may order parents to share these costs if:

• The child has a demonstrated talent or long-standing involvement in the activity
• Both parents previously supported the activity during the marriage
• The activity serves the child's best interests (physical health, social development, academic enrichment)
• Both parents can reasonably afford to contribute

The court has broad discretion here, and outcomes vary significantly by county and judge. Some Ohio courts routinely include extracurricular provisions in support orders; others rarely do.

Best practice: address it in your decree

The most reliable way to handle extracurricular costs is to include specific language in your separation agreement or custody order. Effective provisions typically address:

• A cap on annual extracurricular spending (e.g., "each parent shall contribute up to $1,500 per child per year for extracurricular activities")
• A requirement for mutual agreement before enrolling the child in activities exceeding a certain cost
• How the costs are split (equally, proportionally based on income, or some other formula)
• Which categories qualify (organized sports, music, academic programs, summer camps)

Vague language such as "parents shall cooperate regarding extracurricular activities" provides little protection. Specific, measurable terms are enforceable; aspirational language is not.

Deviation Factors Under ORC 3119.23

Ohio law recognizes that the guideline calculation does not produce a fair result in every case. ORC 3119.23 lists specific factors the court may consider when deciding whether to deviate from the guideline amount. A deviation can increase or decrease the support obligation.

The statutory factors

The court may consider the following when determining whether to grant a deviation:

1. Special and unusual needs of the children -- including physical, psychological, or educational needs that create extraordinary expenses
2. Extraordinary obligations for minor children or obligations for handicapped children -- whether either parent supports other children not subject to the current order, particularly children with disabilities
3. Other court-ordered payments -- such as spousal support obligations to a different former spouse
4. Extended parenting time and associated costs -- if the obligor exercises significantly more parenting time than a standard schedule (more than 90 overnights per year), the associated costs may justify a downward deviation
5. Obligor's income is greater than $300,000 -- for income above the top of the schedule, the court has discretion to determine support rather than using a fixed formula
6. Significant in-kind contributions -- if a parent provides substantial direct support (such as paying for the child's clothing, school supplies, or activities directly) in addition to the support payment
7. Disparity in living standards -- if the guideline amount would create an extreme difference in the standard of living between the two households
8. Benefits received by a parent from remarriage or shared living -- reduced housing costs, for example, from living with a new partner
9. Amount of federal, state, and local taxes actually paid -- when the standard tax adjustment does not accurately reflect a parent's actual tax burden
10. Significant costs for transportation for parenting time -- when parents live far apart and the obligor incurs substantial travel costs to exercise visitation
11. Post-secondary educational expenses -- if a parent is voluntarily paying college costs for older children
12. Costs of court-ordered reunification efforts -- in cases involving abuse, neglect, or dependency proceedings
13. Any other relevant factor -- a catch-all provision allowing the court to consider circumstances not specifically listed

How deviation works procedurally

To obtain a deviation, the requesting parent must demonstrate that the guideline amount would be "unjust or inappropriate" and that the deviation would be in the best interest of the child (ORC 3119.22). The court must make specific written findings of fact explaining why the guideline amount is inappropriate and how the deviation amount was determined.

This means deviation is not automatic. Even if a factor applies, the court must weigh it against the child's needs and both parents' circumstances before granting a deviation.

The 2019 Update: House Bill 366

Ohio's child support guidelines received their most significant overhaul in more than 25 years when Governor John Kasich signed House Bill 366 on June 29, 2018. The changes took effect on March 28, 2019, and apply to all new child support orders and modifications filed after that date.

Key changes under HB 366

1. Updated basic child support schedule. The schedule was completely recalculated using updated economic data. For many income levels, the new schedule produced lower basic obligations than the previous schedule, particularly for moderate-income families.

2. Self-sufficiency reserve. HB 366 introduced a self-sufficiency reserve (SSR) into the schedule, set at 116% of the 2016 federal poverty level for a single person. For obligors earning below this threshold, the schedule produces reduced support amounts to ensure the obligor retains enough income to meet their own basic needs. The minimum monthly child support payment increased from $50 to $80.

3. Parenting time adjustment. The law introduced a 10% automatic adjustment to the support obligation for obligors who have a standard parenting time order (approximately 90 or more overnights per year). This adjustment reduces the obligor's payment to reflect the direct costs they incur while the child is in their care. If the obligor fails to exercise the court-ordered parenting time, the obligee can petition the court to eliminate the adjustment.

4. Health insurance premium credit. Under the updated law, the cost of maintaining health insurance for the children is deducted from the insuring parent's gross income before the combined income is calculated. Previously, the credit was applied differently, sometimes resulting in a less accurate allocation. This change ensures the parent bearing the insurance cost receives a direct offset.

5. Income calculation changes. HB 366 refined how income is imputed to voluntarily unemployed or underemployed parents. Courts and CSEAs are now prohibited from imputing income to a parent who:

• Is receiving means-tested public assistance
• Has been approved for Social Security Disability benefits
• Has a documented physical or mental disability that prevents employment, as determined by a physician

6. Expanded schedule range. The schedule was extended to cover combined incomes up to $300,000 (previously $150,000), giving courts more concrete guidance for higher-income families and reducing judicial discretion in those cases.

7. Extended parenting time deviation. ORC 3119.231 was added, creating a specific framework for calculating deviations when the obligor's court-ordered parenting time exceeds 90 overnights per year. The more overnights the obligor has, the greater the potential deviation.

These changes had a real impact. Many obligors who filed for modification after March 28, 2019 saw their payments decrease, while some custodial parents in low-income cases saw increases due to the higher $80 minimum.

Practical Calculation Example

To illustrate how Ohio's income-shares model works in practice, consider this scenario:

Parent A earns $80,000 per year in gross income. Parent B earns $45,000 per year. They have two children, ages 8 and 11. Parent A is the residential parent. Parent B has standard parenting time (every other weekend, one weeknight, alternating holidays -- approximately 90 overnights per year). Parent B provides health insurance for the children at a cost of $3,600 per year. Annual work-related childcare costs $6,000 (net of tax credits).

Step 1: Determine adjusted gross income

Step 2: Calculate each parent's income share

Step 3: Look up the basic child support obligation

Consulting the Ohio Basic Child Support Schedule (ORC 3119.021) for a combined income of approximately $121,400 with two children, the basic obligation is approximately $17,256 per year ($1,438 per month). (Note: the exact amount depends on where $121,400 falls in the schedule's $600 increment bands. For this example, we use an approximate figure consistent with the current schedule.)

Step 4: Add work-related childcare

The childcare add-on of $6,000 per year is split proportionally:

Step 5: Add cash medical support

Assume the applicable cash medical support amount for two children is approximately $1,488 per year ($744 per child, based on ODJFS calculations):

Step 6: Calculate total obligation and Parent B's payment

Parent B's annual obligation before the parenting time adjustment: $8,437 ($703 per month).

Step 7: Apply the 10% parenting time adjustment

Because Parent B has standard parenting time (approximately 90 overnights), the 10% automatic adjustment applies:

• Adjustment: $8,437 x 10% = $844
• Adjusted annual obligation: $8,437 - $844 = $7,593
• Monthly payment: approximately $633

This is the amount Parent B would pay to Parent A each month through OCSPC, covering their share of basic support, childcare, and cash medical support.

This example is simplified. Actual calculations involve additional adjustments for local taxes, FICA, and other factors specified in the worksheet. Always use the official Ohio Child Support Calculator or consult an attorney for precise figures.

Modification of Child Support

Life circumstances change, and Ohio law provides a clear framework for modifying child support orders. ORC 3119.79 governs the modification process.

The 10% threshold

When either parent requests a modification, the court must recalculate the support amount using the current basic child support schedule and the parents' current incomes. If the recalculated amount differs from the existing order by more than 10% (either higher or lower), this difference is automatically considered a substantial change of circumstances sufficient to justify modification.

This 10% threshold is one of the most parent-friendly modification standards in the country. You do not need to prove a specific life event caused the change -- the mathematical difference alone is enough.

Other grounds for modification

Even if the 10% threshold is not met, the court may modify the order if there has been a substantial change of circumstances that was not contemplated when the existing order was issued. Examples include:

• Significant job loss or income reduction (involuntary)
• Substantial pay increase or new income source for either parent
• A child developing a medical condition or disability
• A material change in the parenting time schedule
• A parent becoming responsible for additional children
• A significant change in health insurance costs or availability
• One parent becoming incarcerated (under certain circumstances)

The 36-month administrative review

Ohio CSEAs are required to review child support orders every 36 months and notify the parents if the recalculated amount differs from the existing order by more than 10%. Either parent can then request a modification. This automatic review process means parents do not necessarily need to hire an attorney or file a motion -- the CSEA will flag orders that may need updating.

Parents can also request a review at any time by contacting their local CSEA, though the CSEA is not required to act outside the 36-month cycle unless there is evidence of a substantial change.

Retroactivity

In Ohio, child support modifications take effect on the date the motion for modification is filed -- not the date the court issues its ruling. This means that if you believe your support should change, filing promptly matters. Any delay between the change in circumstances and the filing date results in lost potential savings or additional support.

What does not justify modification

Ohio courts have generally found the following insufficient grounds for modification:

• Voluntary unemployment or underemployment (the court will impute income based on earning capacity)
• A parent's preference to pay less
• Minor income fluctuations
• A new spouse's income (new spouse income is not included in the child support calculation)
• General inflation without a specific changed circumstance

Documentation Best Practices for Ohio Co-Parents

Strong documentation is your best protection in any Ohio child support proceeding. Ohio courts rely heavily on written evidence, and the parent with better records typically has the advantage.

What to track and how

Five rules for Ohio co-parents

1. Get it in writing. Verbal agreements about expense sharing are nearly impossible to enforce. If you agree to split the cost of braces or summer camp, confirm it in an email or text and keep a copy.

2. Read your decree carefully. The specific language in your separation agreement and support order determines your obligations. Phrases like "in proportion to income" vs. "equally" vs. "as agreed" create very different legal obligations.

3. Submit medical expense documentation promptly. Many Ohio decrees include a 30-day notice requirement for seeking reimbursement of uninsured medical expenses. Missing this deadline can waive your right to reimbursement.

4. Track parenting time accurately. The 10% parenting time adjustment depends on the obligor actually exercising parenting time. If you are the residential parent and the other parent is not exercising their time, documenting this can support a petition to eliminate the adjustment.

5. Use a co-parenting expense tracker. Maintaining records in a shared platform creates transparency and reduces disputes. Both parents can see what was spent, what was reimbursed, and what is outstanding. This is what CoParentSplit is designed to do.

Key Statutes and Resources

Understanding Ohio child support law starts with knowing the primary statutes and where to find help.

Ohio Revised Code -- Chapter 3119

• Chapter 3119 -- Full Text -- The complete chapter governing calculation of child support obligations and health insurance coverage.
• ORC 3119.01 -- Definitions -- Key definitions including gross income, adjusted gross income, and other terms used throughout the chapter.
• ORC 3119.021 -- Basic Child Support Schedule -- The statute establishing the schedule, its structure (combined incomes from $8,400 to $300,000), and the self-sufficiency reserve.
• ORC 3119.05 -- Other Computing and Calculating Guidelines -- Rules for income verification, childcare add-ons, health insurance credits, and separate orders for extraordinary expenses.
• ORC 3119.22 -- Deviation from Guidelines -- The standard for granting deviations (unjust, inappropriate, or not in the child's best interest).
• ORC 3119.23 -- Deviation Factors -- The complete list of factors courts may consider when deciding whether to deviate from the guideline amount.
• ORC 3119.231 -- Extended Parenting Time Deviation -- The framework for calculating deviations when parenting time exceeds 90 overnights per year.
• ORC 3119.30 -- Health Care Provisions -- Requirements for health insurance allocation and cash medical support in every support order.
• ORC 3119.79 -- Modification of Child Support -- The 10% threshold, change-of-circumstances standard, and procedural requirements for modifying support.

State Resources

• Ohio Child Support Calculator -- The official online calculator maintained by ODJFS that walks you through the worksheet step by step.
• Ohio Department of Job and Family Services -- Child Support -- The state agency overseeing child support enforcement, payment processing, and CSEA operations.
• Ohio Legal Help -- Free legal information and self-help tools for Ohioans who cannot afford an attorney.
• Ohio State Bar Association -- Family Law Resources -- Lawyer referral services and public legal education materials.

House Bill 366

• HB 366 -- Legislative Summary -- The full text and history of the 2018 law that overhauled Ohio's child support guidelines effective March 28, 2019.
• Legal Aid Society of Cleveland -- HB 366 Overview -- A plain-language summary of the key changes under the new law.