Ohio tax filing: file OH state taxes online, Form IT 1040, rates and deadline

Do you have to file an Ohio tax return?

Ohio ties its filing requirement to your Ohio adjusted gross income and your total exemption amount rather than a single dollar cutoff. In general, an Ohio resident must file a Form IT 1040 for 2025 unless one of the state's exceptions applies. You do not have to file if:

• Your Ohio adjusted gross income is zero or less, or
• Your total personal and dependent exemption is equal to or greater than your Ohio adjusted gross income, or
• Your Senior Citizen Credit, Lump-Sum Distribution Credit, and Joint Filing Credit together cover your tax, and you owe no school district income tax.

As a practical matter, single filers generally start to owe Ohio tax once federal adjusted gross income passes roughly $28,450, because the first $26,050 of taxable nonbusiness income is exempt. You should also file if Ohio tax was withheld from your pay and you want it refunded. Residents, part-year residents, and nonresidents with Ohio-source income all use the same Form IT 1040; residency and income allocation are handled inside the return on the Schedule of Adjustments and the nonresident credit schedule, so there is no separate nonresident form.

The current filing rules are published by the Ohio Department of Taxation, and the state tax filing pillar compares Ohio with the other states.

Ohio income tax rates for 2025 and the 2026 flat tax

Ohio is in the middle of a multi-year move to a flat tax, so 2025 and 2026 look different. For tax year 2025, the return you file in 2026, Ohio still uses a graduated schedule on nonbusiness income:

The first $26,050 is effectively a zero bracket, which is why many lower-income Ohioans owe no state income tax at all. Beginning with tax year 2026, House Bill 96, signed in June 2025, collapses the schedule into a single flat 2.75 percent rate on taxable nonbusiness income above $26,050, so the 3.125 percent top rate is gone after 2025.

Ohio has no standard deduction. Instead it grants a personal and dependent exemption for you, your spouse if filing jointly, and each dependent. The amount per exemption steps down as your Ohio modified adjusted gross income rises:

Business income is handled separately, through the Business Income Deduction and a flat 3 percent rate on business income above the deduction, which is why the schedule above specifies "nonbusiness" income. Social Security benefits are not taxed by Ohio, and most military retirement pay is exempt.

Ohio city income tax and school district tax

The part of Ohio filing that surprises newcomers is that the state income tax is only the first layer. Many Ohioans owe two more local income taxes, and neither is collected on the IT 1040.

Municipal (city) income tax. Most Ohio cities and villages levy their own income tax, usually between 1 and 3 percent, with 2 to 2.5 percent the most common. It applies to residents and to nonresidents who work in the city. Two agencies collect most of them: the Regional Income Tax Agency (RITA), with more than 300 member municipalities, and the Central Collection Agency (CCA), which handles Cleveland and dozens of others. Most cities give a credit, often up to the full amount, for tax you paid to the city where you work, which limits double taxation when you live in one city and work in another.

School district income tax. More than 200 Ohio school districts levy an income tax of roughly 0.5 to 2 percent, approved by local voters. Unlike the city tax, it is based on the district where you live, not where you work, and it is filed on Form SD 100, due the same April 15 as the state return.

These local returns are filed separately from your Ohio IT 1040. TaxFile prepares your federal and Ohio state returns; check your city and school district to confirm whether you also owe a municipal or SD 100 return, since rates and requirements vary by locality. You can look up your school district on the Ohio Department of Taxation site.

Ohio tax filing deadline, extension and filing online

Ohio's deadline matches the federal one: April 15, 2026 for tax year 2025 returns, and the school district SD 100 shares that date. Ohio does not have its own extension application. Instead it automatically honors your federal extension: if you file federal Form 4868, your Ohio filing deadline moves to October 15, 2026, and you keep a copy of the federal extension with your records.

An extension gives you more time to file, not more time to pay. If you expect to owe, pay by April 15 to stop interest and penalties from running; Ohio takes payments electronically or by check with the Ohio Universal Payment Coupon (OUPC), which replaced the old IT 40P voucher.

Filing electronically is the practical default, and the Ohio return builds on your federal figures. TaxFile prepares both from one pass:

• Upload or talk. Drop in your W-2s and 1099s and it reads them, or describe your year and it asks what it needs.
• Federal and Ohio together. One set of documents produces both returns, with the 2025 rates and the $26,050 exemption applied.
• Exemptions and credits checked. It claims the personal and dependent exemptions at the right tier and tests credits like the Joint Filing Credit.
• Error check, then you approve. Nothing is e-filed until you review and approve every line, through an authorized IRS e-file provider.

Pricing is $39 for a simple return, $89 self-employed, $199 business, plus $19 for each state return. There is no free tier. If your Ohio income comes from contract or freelance work, self-employed tax filing covers Schedule C and Schedule SE in more detail. TaxFile does not e-file federal extensions or prepare amended returns, does not file municipal or school district returns, and does not handle capital gains on Schedule D, rental income on Schedule E, or cryptocurrency. TaxFile is self-prepared tax software and does not provide personalized tax advice, and no refund amount is guaranteed.