Are 529 Contributions Tax Deductible in Ohio?

Yes. If you’re an Ohio resident, contributions to Ohio’s CollegeAdvantage 529 plan are deductible on your state income tax return, up to $4,000 per beneficiary each year, with anything above that cap carrying forward to future tax years.¹ The deduction is only available for contributions to Ohio’s own plan. Deposits into another state’s 529 don’t qualify for the Ohio break.²

How Much You Can Deduct Each Year

Ohio Revised Code Section 5747.70 lets you subtract up to $4,000 per beneficiary from your state taxable income in a given year.¹ The $4,000 ceiling is the same for single filers and married couples filing jointly. It applies per beneficiary, not per account or per return, so contributing for more than one child multiplies the amount you can deduct. Two beneficiaries means up to $8,000 in the same tax year. Three means up to $12,000. And so on.

When Contributions Exceed the Annual Cap

Contributions above $4,000 for a single beneficiary in one year don’t disappear. They carry forward indefinitely, deductible at $4,000 per year until the balance is used up.¹ A $12,000 deposit for one child, for example, produces a $4,000 deduction this year, $4,000 next year, and $4,000 the year after. Large front-loaded contributions still get their full state tax benefit, just spread across future returns.

What the Deduction Is Actually Worth

The dollar savings depend on your Ohio bracket. For tax year 2025, the state’s rates run from 0% on the first $26,050 of taxable income, to 2.75% on income between $26,050 and $100,000, to 3.125% on income above $100,000.³ At the top rate, a full $4,000 deduction cuts your state tax bill by roughly $125. The savings scale with the number of beneficiaries you contribute for.

Who Can Claim the Deduction

You don’t need to own the account. Any Ohio taxpayer who makes a contribution to an Ohio CollegeAdvantage 529 — a parent, grandparent, aunt, uncle, or family friend — can deduct that contribution on their own state return, up to the $4,000 per-beneficiary limit.¹ Each contributor claims what they personally put in.

The one hard boundary is the plan itself. Contributions to a 529 sponsored by another state produce no Ohio deduction, even for an Ohio taxpayer.² If you’re already holding an out-of-state plan, you can generally roll the funds into a CollegeAdvantage account without a tax penalty, and future contributions to the Ohio account then become eligible.

How to Claim It on Your Ohio Tax Return

You report the deduction on the Ohio IT 1040 and the accompanying Schedule of Adjustments. The 529 contribution deduction has its own line on the Schedule of Adjustments — Line 34 on recent versions of the form.⁴ Enter the total eligible amount for the year, whether that’s a current-year contribution up to the cap or a carry-forward from an earlier deposit. Contributions for multiple beneficiaries are added together before you enter the total.

Before filing, pull together three things for each account you contributed to:

The total dollars deposited between January 1 and December 31.
The full legal name and Social Security number of the beneficiary.
The 11-digit Ohio CollegeAdvantage account number.

You can file electronically through OH|TAX eServices, the Ohio Department of Taxation’s free online portal.⁵ If you had an account under the older I-File system, you’ll need to create a new OH|TAX eServices login. Paper filing is available but generally takes several additional weeks to process.

Deadline for Contributions

Contributions have to be completed by December 31 of the tax year to count toward that year’s deduction. CollegeAdvantage has historically set a processing cutoff of December 30, so submitting a day or two ahead of year-end avoids the risk of a deposit posting after the deadline.

When Ohio Can Take the Deduction Back

The deduction isn’t permanent if the money later leaves the account for the wrong reason. If you previously deducted a contribution and then take a non-qualified withdrawal — money not used for qualified education expenses — Ohio requires you to add the previously deducted amount back on the Schedule of Adjustments.⁶ The recapture applies when three conditions are all met: the withdrawn amount isn’t already in your federal adjusted gross income, the funds weren’t spent on qualified education expenses, and the original contribution was deducted on any Ohio return in a prior year.

A few situations don’t trigger recapture. Withdrawals made because the beneficiary receives a scholarship, becomes disabled, or dies are excepted, and so are distributions tied to attendance at a U.S. military academy. Those same events also spare you the federal 10% additional tax on the earnings portion of a non-qualified withdrawal, though regular federal income tax on earnings still applies.⁷

One Note on Very Large Contributions

The federal gift tax rules let you front-load up to five years of annual-exclusion gifts into a single 529 contribution — up to $95,000 per beneficiary for one person in 2026, or $190,000 for a married couple.⁸ That’s a federal rule, not an Ohio one. Ohio still deducts the contribution at $4,000 per year through the carry-forward, so a $95,000 deposit would take roughly 24 years to fully work through your state returns.¹ The deduction isn’t lost, but it’s slow.

1
Ohio Legislative Service Commission. Ohio Revised Code Section 5747.70
2
Ohio Department of Taxation. Ohio’s 529 Plan
3
Ohio Department of Taxation. Annual Tax Rates
4
Ohio Department of Taxation. Ohio Schedule of Adjustments
5
Ohio Department of Taxation. OH|TAX – File Now
6
Ohio Department of Taxation. Income – 529 Plan Account Deduction
7
Office of the Law Revision Counsel. 26 U.S. Code 529 – Qualified Tuition Programs
8
Internal Revenue Service. What’s New — Estate and Gift Tax