How to Modify Child Support in Ohio: Filing Steps and Effective Date

By the FigureMyTax Editorial Team · How we calculate

To modify Ohio child support, file a petition and give notice to each obligee and the obligor. A change can reach only payments that become due after notice, so start promptly.

How do you modify child support in Ohio?

1. Run the schedule amount in the Ohio child support calculator and test it in the modification calculator.
2. Ask the court or the agency to modify: file a petition or motion with the court that has your order, or ask your county child support enforcement agency about a review (ORC 3119.79).
3. Give notice to each obligee and the obligor. A change can reach payments that become due after notice (3119.84).
4. Show the 10% deviation or another substantial change.
5. Keep paying the existing order until it changes.

Why does the Ohio notice date matter?

Because the court may modify a payment that becomes due after notice of the petition has been given, and it may not retroactively modify delinquent support (3119.84; 3119.83). A change in January and notice in July leaves six months at the old amount.

Can I ask for withholding in the same Ohio motion?

Yes. The obligor or obligee may file a motion at any time asking the court to issue withholding or deduction notices to pay the support due, and the agency must complete an investigation within 20 days after the motion is filed (3119.80). Before the end of hearings in a support proceeding the court orders the agency to investigate if no withholding order is in place (3119.81).

Who tells the Ohio agency when an order should end?

The residential parent and legal custodian or other custodian must immediately notify the agency of any reason the order should terminate, and the obligor may notify it; a willful failure to notify on a court order is contempt (3119.87). Do this when a child ages out.

What does the Ohio agency do after that?

Within 20 days it completes an investigation if an application for services is on file: whether a reason to terminate exists, whether other children are subject to the order, whether arrears are owed, whether withholding should continue and whether payments should be impounded to avoid an overpayment (3119.89).

Can I ask for a review without filing myself?

If your county agency administers the order, you can ask it about a review, and the agency can start an investigation on its own if it believes a reason to change or end the order exists (3119.89(A)). Filing your own petition protects your notice date.

Does the court look at who claims the children for taxes?

Yes. On every modification the court designates which parent may claim the children, and if the parents disagree it weighs the net tax savings, each parent’s finances, the children’s time with each parent and tax credits (3119.82). Bring last year’s return.

How much does a late petition cost? An example

If notice happens 3, 6 or 9 months after your change, the relief you lose at a $300 monthly difference is:

What happens to unpaid support while the petition is pending?

It stays owed. See whether Ohio arrears can be changed and add up your balance.

Frequently asked questions

Official sources

• ORC 3119.79: modification of support
• ORC 3119.84: modification after notice
• ORC 3119.83: no retroactive modification
• ORC 3119.06: minimum support order
• 42 U.S.C. 666(a)(9): no retroactive modification of support already due
• ORC 3119.87: duty to notify the agency
• ORC 3119.89: agency investigation

This is general information, not legal advice. It is based on the cited Ohio statutes, rules and court opinions, and every case turns on its own facts. Confirm how the law applies to your situation with a licensed Ohio attorney.