Hamilton County Child Support Attorneys

Reviewed by Stephanie Green · Managing Partner & Co-Founder · Last updated June 11, 2026

Hamilton County, Ohio · Cincinnati

Ohio sets child support with a statewide Income Shares worksheet, but where you file depends on your situation. Married parents establish or change support in the Court of Domestic Relations; never-married parents use the Juvenile Court. The Hamilton County CSEA administers the order once it's entered. Run the official Ohio calculator first so you know what to expect.

Hire Gavvl for your Hamilton County child support case

Flat-fee and full-representation options: we handle the filings, the Hamilton County local forms, the court strategy, and the hearings — and you know the price before we start.

Start with a $25 consultation and talk through your options with an Ohio family-law attorney before you commit to anything. Get started online or see payment plans & financing.

How do I set up or change child support in Hamilton County, Ohio?

First run the official Ohio Child Support Calculator (2024 Income Shares worksheet). To establish support if you were married, file a Section 10 complaint (CDR Form 1.31, $350) in Domestic Relations, or set it inside your divorce. If you were never married, file the Juvenile Court 'Filing for Child Support — New Case' packet ($100). To change an existing order, file in the court that issued it — a Blank Motion (CDR Form 3.8, $125 post-decree) in DR or the Motion to Modify Support packet ($100) in Juvenile. Include the Group Health Insurance Affidavit and IV-D Application so the Hamilton County CSEA can administer it.

Hire Gavvl Law for your Hamilton County child support case

Ohio sets child support with a statewide Income Shares worksheet, but where you file and what you deposit to file it depends on your family: married parents use the Court of Domestic Relations, never-married parents use the Juvenile Court, and every order is administered by the Hamilton County CSEA once the IV-D application is in. Gavvl Law runs the worksheet correctly and files the right motion — a flat fee for a clean establishment or modification, full representation when the number is contested.

The correct form and deposit for your situation. Establishing support for married parents outside a divorce uses CDR Form 1.31 with a $350 deposit at Domestic Relations; changing an existing DR order uses the Form 3.8 Blank Motion at $125; a never-married case opens in Juvenile Court for $100. We match your facts to the right filing so you're not paying the wrong deposit or filing the wrong motion.
Modifications documented the way Hamilton wants. Under R.C. 3119.05, a modification needs three years of income proof — pay stubs, tax returns, overtime, commissions, bonuses, and any pre-existing support obligations. We assemble that record so the recalculated worksheet holds up and a genuine change in circumstances actually moves the number.
Built around CSEA enforcement. Every Hamilton County support order is collected through CSEA income withholding once it's entered. We file the IV-D Application (HC 7076) and the Support Account Data Form (CDR 4905) with your case so the order is enforceable and withholding can start the day it's signed — not weeks later after a paperwork gap.

Each parent's obligation is based on their share of the combined income, so the accuracy of the worksheet is everything. We build the calculation from complete income records for both parents — the same records Hamilton will scrutinize — so the support figure you walk out with is the right one and stands up to review.

Flat-fee options

Flat-fee limited scope: we draft and file the support motion (establish, modify, or terminate). The court filing fee is billed separately and this does not include in-court representation.

Establish child support: $950
Modify child support: $950
Terminate child support: $950

Prefer full representation? An Ohio attorney can carry the entire case on a $3,500 retainer.

Split any flat fee with Gavvl Direct — our in-house plan at 19% APR, $500 minimum — on a 60%-down schedule of 18 weekly, 8 bi-weekly, or 4 monthly payments, or full financing where work begins once 60% is paid. Affirm, Klarna, and PayPal Pay Later are also available through LawPay.

Start your child support case or see payment plans & financing.

Ohio Child Support by the Numbers

2024 Year Ohio's updated Income Shares support schedule took effect Source: Ohio Revised Code § 3119.021
10% Change in the calculated amount that justifies a modification Source: Ohio Revised Code § 3119.79
3 years How often either parent can request an administrative review Source: Ohio Revised Code § 3119.60
Age 18 When support normally ends — or high-school graduation, whichever is later Source: Ohio Revised Code § 3119.86

What Counts in an Ohio Child Support Calculation

What the worksheet counts	Counts toward support?	Notes
Both parents' gross income	Yes	Wages, salary, commissions, bonuses, and self-employment earnings
Health insurance for the children	Yes	Credited to the parent who pays the premium
Work-related childcare	Yes	Daycare and after-school costs are added in
Parenting time	Yes	Adjustments apply for substantial or equal parenting time
Imputed income	Sometimes	Added when a parent is voluntarily unemployed or underemployed
A new spouse's income	No	Only the two parents' incomes are counted

Where to File: Hamilton County Court of Domestic Relations

800 Broadway
Phone: (513) 946-9150
Hours: Monday–Friday, 8:00 AM – 4:00 PM
Website: Court website
e-Filing: Online e-filing portal

Juvenile Branch (Never-Married Parents)

Hamilton County Juvenile Court
800 Broadway
Phone: (513) 946-9431
Hours: Monday–Friday, 8:00 AM – 4:00 PM

Child Support is the right path if…

You need a first child-support order.
Your income or the other parent's income has changed and the current order is outdated.
Health-insurance or child-care costs have changed.
You were never married and need the Juvenile Court to set support.
You're married with no divorce pending and need a stand-alone support order (Section 10).

The other parent isn't paying what's already ordered? See enforcement & contempt.

Filing Fees

DR establishment (Section 10): $350 · DR modification (post-decree): $125 · Juvenile support: $100 new or modify · fee waiver available · confirm current amounts with the Clerk

Forms & Filing Packets

Domestic Relations — establish support (married, Section 10) — $350 (Section 10 establishment)

Married, no divorce pending: establish a first support order in the Court of Domestic Relations.

Complaint for Child Support, Medical & Tax Exemption (CDR Form 1.31) — Married-parent support complaint under Section 10 when you need a support order but no divorce is pending.
Affidavit of Basic Information, Income, Expenses & Financial Disclosure (CDR Form 7.3) — Hamilton's local income/expense affidavit. Each party files their own; must be notarized.
Group Health Insurance Affidavit (CDR Form 7.16) — Discloses whether health insurance is available through either parent's employer so the court can order medical support.
Affidavit in Compliance with ORC 3127.23 / UCCJEA (CDR Form 2.1) — Lists where each child has lived for the last 5 years, confirming Ohio's jurisdiction. Required in any DR case with minor children.
Ohio Child Support Computation Worksheet (2024 Income Shares) — Run the official Ohio Child Support Calculator, print, and sign. Required any time the court sets or changes support.
IV-D Application for Child Support Services (ODHS/HC 7076) — Required whenever the court establishes, modifies, or enforces child support. The Hamilton County CSEA administers IV-D services.
Support Account Data Form (CDR 4905) — Account data the CSEA needs to set up income withholding for a new or modified support order.

Domestic Relations — change an existing order — $125 (post-decree)

Modify a support order issued by the Court of Domestic Relations.

Blank Motion (CDR Form 3.8) — Hamilton's general-purpose DR motion form. Used for post-decree support modifications, contempt, and other relief. Serve CSEA when support is involved.
Affidavit of Basic Information, Income, Expenses & Financial Disclosure (CDR Form 7.3) — Hamilton's local income/expense affidavit. Each party files their own; must be notarized.
Ohio Child Support Computation Worksheet (2024 Income Shares) — Run the official Ohio Child Support Calculator, print, and sign. Required any time the court sets or changes support.
IV-D Application for Child Support Services (ODHS/HC 7076) — Required whenever the court establishes, modifies, or enforces child support. The Hamilton County CSEA administers IV-D services.
Written Request for Service (CDR Form 43.7A) — Tells the Clerk how to serve the other party (certified mail, sheriff, etc.).

Juvenile Court — never-married parents — $100 (new case or modification)

Establish or change support when the parents were never married.

Filing for Child Support — New Case (Complete Packet) — Juvenile Court packet to establish a first child-support order for never-married parents.
Ohio Child Support Computation Worksheet (2024 Income Shares) — Run the official Ohio Child Support Calculator, print, and sign. Required any time the court sets or changes support.

How to File Child Support in Hamilton County

Run the Ohio worksheet. Use the official Ohio Child Support Calculator to compute the presumed amount before you file.
Pick the right court. Married → Domestic Relations (Section 10 establish, or post-decree to modify). Never married → Juvenile Court.
Complete the packet. Attach the income affidavit (7.3 in DR), Group Health Insurance Affidavit, IV-D Application, and the signed worksheet.
File and serve. E-file in DR (pro se allowed) or file the Juvenile packet at 800 Broadway; pay the deposit or file a fee waiver, and request service.
Set up CSEA withholding. File the Support Account Data Form so the Hamilton County CSEA can start income withholding once the order is entered.

Hamilton County Practice Notes

Ohio's worksheet controls the number. Hamilton County does not use a local support formula. The 2024 statewide Income Shares worksheet — based on both parents' gross incomes, parenting time, health-insurance, and child-care costs — produces a presumed-correct amount. Estimate at ohiochildsupportcalculator.ohio.gov before filing.
Bring 3 years of income proof to modify. For a modification (R.C. 3119.05), the court wants pay stubs, employer statements, tax returns, documentation of any other support obligations, and documentation of overtime, commissions, and bonuses for the 3 years before the computation.
CSEA administers the order. Once support is ordered, the Hamilton County Child Support Enforcement Agency handles income withholding and payment records. File the IV-D Application (HC 7076) and Support Account Data Form (CDR 4905) so the order can be enforced.

Frequently Asked Questions

How do I set up child support in Hamilton County, Ohio?: If you were married, the Court of Domestic Relations sets support — through the divorce/legal-separation case or a Section 10 establishment complaint (CDR Form 1.31, $350). If you were never married, file the Juvenile Court 'Filing for Child Support — New Case' packet ($100). Either way you run the official Ohio Child Support Calculator (2024 Income Shares worksheet) and file a Group Health Insurance Affidavit and IV-D Application so the Hamilton County CSEA can administer the order.
How is the child-support amount calculated in Hamilton County?: Ohio uses a statewide Income Shares model (the 2024 schedule), not a county formula. Both parents' gross incomes, the parenting-time arrangement, health-insurance costs, and child-care costs go into the official Ohio Child Support Computation Worksheet. The worksheet result is presumed correct, though the court can deviate for documented reasons. Use ohiochildsupportcalculator.ohio.gov to estimate before you file.
How do I change an existing child-support order in Hamilton County?: File in the court that issued the order. In Domestic Relations, file a Blank Motion (CDR Form 3.8) with an updated Affidavit of Income (7.3), a new support worksheet, and the IV-D Application — the post-decree deposit is $125. In Juvenile Court, file the Motion to Modify Support packet ($100). Bring pay stubs, tax returns, and documentation of overtime/bonuses for the last 3 years (R.C. 3119.05).

Free Local Resources in Hamilton County

Hamilton County Domestic Relations Self-Help Resources. Complete listing of all Domestic Relations forms, dissolution merit instructions (Form 9.0), the decree checklist, and the Accept/Reject/Resubmit e-filing guidance at hamiltoncountyohio.gov.
Hamilton County Clerk of Courts E-Filing. Self-represented and represented parties can e-file Domestic Relations cases through the Clerk of Courts e-filing portal at courtclerk.org. Pro se registration is available; credit cards accepted with a convenience fee. Help line (513) 946-5612.
Hamilton County Job & Family Services — Child Support (CSEA). Hamilton County's IV-D child-support agency. Opens cases, runs wage withholding, distributes payments, and enforces orders. File the IV-D Application (HC7076) when establishing or modifying support.
Hamilton County Juvenile Court Help Center. A partnership with the UC College of Law offering low-income residents free education and limited legal advice on custody, parenting time, companionship, and support in Juvenile Court. 800 Broadway, 1st Floor; (513) 946-9440.
Legal Aid Society of Greater Cincinnati. Free civil legal aid for low-income Hamilton County families, including help with custody, support, and domestic-violence protection orders.

Related to your child support case

Paternity & Custody — Establish parentage and build a parenting plan that protects your children.
Post-Decree Modification — Update custody, support, or parenting orders after your case ends.
Spousal Support — Pursue or respond to alimony requests during and after divorce.

Related guides

In-depth, attorney-written guides on child support and related Ohio family law topics.

Child Support Calculation in Ohio: How the Formula Works — Ohio calculates child support with the income shares model, combining both parents' incomes to set a shared obligation. Here's how the formula works and what changes the bottom line.
How to Modify Child Support in Ohio — Child support orders aren't permanent. When income or circumstances change substantially, Ohio lets you modify support — through a CSEA review or a court motion. Here's how.