Introduction
Ohio's individual income tax return is Form IT 1040. It shares a number with the US federal Form 1040, but the forms, rules and filing process are separate. This guide covers the 2025 tax year, filed in 2026.
Australian residents with Ohio-source income, such as wages or rental property, often get stuck in four places:
- Deciding whether you must file
- Picking the right Ohio form
- Working out residency status
- Carrying figures over from the federal return
You still need to file an Ohio return when you have Ohio-source income, even if you live in Australia full time.
Below you'll find who files, what to gather, how the online steps work, rates and deductions, and how to pay, track and correct a return.
Key Takeaways
- Use the 2025 Ohio Department of Taxation booklet and confirm your filing method supports tax year 2025.
- Settle residency (resident, part-year, nonresident) before deciding which income goes on the return.
- Check school district tax, credits and payments separately from the state return.
- Save the confirmation code and keep a full copy of the return for four years.
Who Needs to File Ohio Form IT 1040, and Which Return Applies?
Start with residency and Ohio-source income
Ohio defines three categories:
- Full-year resident: permanent residence in Ohio, even if you spend time elsewhere.
- Part-year resident: you permanently moved into or out of Ohio during the year.
- Nonresident: permanent residence outside Ohio, but you may still owe a filing if you have Ohio-source income.
You generally file if you lived in Ohio for part of the year or received Ohio-source income. Common Ohio-source income includes:
- Wages earned in Ohio
- Ohio property income
- Ohio lottery, casino, or sports-betting winnings
- Income from a sole proprietorship or pass-through entity doing business in Ohio
There is no single income threshold. The 2025 booklet lists exceptions:
- Ohio AGI is $0 or less
- Exemptions equal or exceed Ohio AGI
- Certain credits wipe out your tax
Any school district liability overrides these exceptions and requires an IT 1040. The department also recommends filing if federal AGI exceeds $28,450, even with no tax due.
Match your situation to the right form
| Form | Use |
|---|---|
| IT 1040 | The Ohio individual income tax return |
| IT 10 | Zero liability, no refund. Not an extension request. File this or the IT 1040, never both |
| SD 100 | Separate school district return. Can be required alongside the IT 1040 |
| Amended return | For 2025, file an IT 1040 marked amended with Form IT RE and support, not a legacy IT 1040X |
Don't choose by the "1040" label alone. A school district return is a different filing from the state return.
Reciprocal agreements
Full-year residents of Indiana, Kentucky, Michigan, Pennsylvania, and West Virginia generally do not need to file in Ohio when their only Ohio-source income is wages. Their employer uses Form IT 4 to stop Ohio withholding.
If Ohio tax was withheld anyway, file an IT 1040 to recover it. Non-wage Ohio income falls outside the exception.
Filing year and deadlines
Pick the 2025 booklet and a return that supports tax year 2025. The ordinary filing and payment deadline is April 15, 2026.
Ohio has no extension form; it honors the IRS extension, which generally moves the filing date to October 15, 2026. Payment is not extended.
Check the Department of Taxation's site for any Ohio-specific disaster postponement before relying on one.
Prepare Before Filing Online
Gather tax documents
- Federal Form 1040 and schedules
- W-2s, 1099s and retirement income statements
- Ohio withholding records
- Estimated and extension payments, plus any prior-year overpayment carried forward
- Ohio IT K-1s and credit certificates
- Your prior Ohio return
Keep returns, schedules and payment records for at least four years after the later of the due date or filing date.
Personal, residency and school district details
- SSNs or ITINs for you, your spouse and dependents
- Current address, county and bank details for direct deposit or payment
- Dates you lived in Ohio and records of any moves
Your school district uses a four-digit number based on your primary address. The Ohio Department of Taxation's online school district Finder looks it up by address or ZIP code. On the SD 100 residency schedule, use 9999 for periods you were not an Ohio resident.
Records for deductions and credits
Collect these records when they apply:
- Proof of payment and account details for each 529 beneficiary
- Retirement income statements
- Business income records
- Documentation for any credit for tax paid to another state
Required schedules differ from records you merely keep. Ohio generally does not require routine mailed attachments for e-filed returns, but it may ask for federal return copies or wage statements later.
How to Complete and File Ohio IT 1040 Online
Choose a filing method
- OH|TAX eServices: free filing for IT 1040, SD 100 and IT 10 (tax years 2021 to 2025)
- Approved software or a preparer: supports federal and state together or state only. Fees vary, and the department lists approved 2025 products.
- IRS Free File offers: some include free state filing, others charge. Check each offer.
OH|TAX access needs an OHID, an SSN or ITIN, a US or Canada IP address, and either a prior Ohio return from 2020 to 2024 or a qualifying Ohio driver's license or ID.
The US or Canada IP rule matters if you file from Australia. If the free portal blocks you, use a preparer or approved software instead. Paid preparers generally must e-file Ohio returns.
Enter taxpayer information
Confirm these details before anything else:
- Filing status and dependents
- Address and school district
- Dates of Ohio residence and nonresident status
Registration details must match Ohio's records.
Transfer federal income
Line 1 of the IT 1040 starts with federal AGI. Reconcile it against your filed federal return, W-2s and 1099s rather than trusting an import blindly.
Apply Ohio adjustments, credits and withholding
| IT 1040 line | What goes there |
|---|---|
| 2a / 2b | Additions and deductions (Schedule of Adjustments) |
| 4 | Exemptions |
| 6 / 7 | Taxable business / nonbusiness income |
| 9 / 16 | Nonrefundable / refundable credits (Schedule of Credits) |
| 14 / 15 | Ohio withholding / estimated and extension payments |
The 2025 package uses Schedule of Adjustments, Schedule of Credits and Schedule of Business Income, not the older Schedule A, B and IT BUS names.
Review, sign and submit
Fix missing fields, recheck SSNs and bank numbers, and confirm the school district. In OH|TAX, you sign by selecting "I Agree- File My Return."
Each return gets its own confirmation code. If you have no code, Ohio hasn't received it. For software filings, "Accepted" means received; "Rejected" means correct and retransmit. Download a full copy and save the confirmation.
Ohio Rates, Deductions, Credits, and Special Situations
2025 rates
| Ohio taxable nonbusiness income | Tax |
|---|---|
| $0 to $26,050 | 0% |
| $26,050 to $100,000 | $342 + 2.75% of the excess over $26,050 |
| Over $100,000 | $2,394.32 + 3.125% of the excess over $100,000 |
The top rate fell from 3.5% in 2024 to 3.125%, per the Ohio rate schedule. Remaining taxable business income is taxed at a flat 3% after the deduction below.
Personal exemption
| Modified AGI | Exemption per person |
|---|---|
| $40,000 or less | $2,400 |
| $40,001 to $80,000 | $2,150 |
| $80,001 to under $750,000 | $1,900 |
| $750,000 or more | $0 |
Modified AGI is Ohio AGI plus the business income deduction, not automatically federal AGI.
529 deduction
Ohio allows up to $4,000 per beneficiary per year, combined for you and your spouse. Excess carries forward. For example, an $8,000 contribution on January 2, 2025 gives $4,000 this year and $4,000 next year.
Contributions to any state's 529 plan qualify, per Ohio Revised Code 5747.70. Enter the deduction on line 37 of the Schedule of Adjustments.
Retirement income and benefits
- Pensions and distributions are generally taxable to the extent included in federal AGI, unless an Ohio deduction applies.
- Taxable Social Security and Tier I railroad retirement are deductible, as is qualifying military retirement pay.
- Qualifying disability benefits are deductible, with exceptions for temporary sick pay.
- The retirement income credit maxes at $200 per return, and MAGI less exemptions must be under $100,000.
Business, multistate and school district issues
- The business income deduction covers up to $250,000 ($125,000 married filing separately).
- Residents taxed by another state may claim credit IT RC; part-year and nonresident filers use IT NRC.
- Form SD 100 (school district tax) is filed separately; some districts tax retirement income, while earned-income districts don't.
- Municipal tax is separate from both state and school district tax.
Submit, Pay, Track, and Correct the Return
Deadlines and payment
An IRS extension moves filing to October 15 but not payment. Unpaid April 15 balances accrue interest and possibly penalties. Pay Ohio income tax and school district tax separately.
Payment and refund methods
- OH|TAX electronic check from a bank account: no fee.
- Card payments: 2.65% or $1 minimum, whichever is greater, charged by the processor.
- Checks or money orders use the Ohio Universal Payment Coupon.
- Direct deposit refunds typically arrive in about 15 business days; paper returns take 8 to 10 weeks.
- Ohio's refund tracker covers the current and prior two years; electronic filings may take 2 to 3 days to appear.
Corrections and complex returns
Use an amended IT 1040 with IT RE for changes to income, withholding, deductions, exemptions or credits. Refund claims generally run four years from payment.
If an IRS review changes your federal figures, amend within 90 days of completion. Most adjustment notices only need the requested documents, so don't file a second original return.
For multistate, business or cross-border situations, VJM Global provides U.S.-compliant tax and accounting support, including Form 1040 and 1040-NR preparation. Support is offered without Ohio-specific licensure or a local Ohio presence.
Frequently Asked Questions
Where can I find Ohio 2025 income tax forms and instructions?
Visit the Ohio Department of Taxation forms page at tax.ohio.gov/home/forms and select 2025. Confirm the booklet title reads Tax Year 2025 before downloading.
What are the income tax rates in Ohio for 2025?
Nonbusiness rates are 0%, 2.75% and 3.125% under the 2025 schedule. Final tax also depends on exemptions, deductions and credits.
What is the personal exemption amount for Ohio income tax?
It is $2,400, $2,150 or $1,900 depending on modified AGI, and $0 at $750,000 or more.
Can I deduct 529 contributions from my state taxes in Ohio?
Yes, up to $4,000 per beneficiary annually, with excess carried forward. Keep proof of payment and account details.
Do retirees pay income tax in Ohio?
Often yes. Pensions are generally taxable, but taxable Social Security and qualifying military retirement pay are deductible, and a retirement income credit may apply.
When are Ohio state income tax returns due?
April 15, 2026. An IRS extension generally moves filing to October 15, but payment is still due April 15. Check the Department of Taxation for any relief.
