Ohio Personal Tax Extension Guide

Form IT 40P  ·  Individual Income Tax  ·  Personal Filing Guide

Ohio grants an automatic six-month extension for filing personal income tax returns to taxpayers who have been approved for a federal extension by the IRS. The Ohio Department of Taxation aligns with the federal timeline, moving the state filing deadline from April 15, 2026, to October 15, 2026. No separate Ohio extension application is required.

When you file your Ohio IT 1040, you must check the box indicating you filed federal Form 4868 with the IRS for this tax year. You must also include a copy of your IRS extension with your Ohio return. These two steps document your eligibility for the automatic state extension.

Ohio's extension applies to filing only—not to paying taxes. Any Ohio income tax owed must be paid by April 15, 2026, to avoid Ohio's substantial penalties.

• ACH / E-Check (Free): Pay by electronic check at tax.ohio.gov/individual/pay-online/payonline. No fee for this option.
• Credit Card: Pay via www.acipayonline.com or call 1-800-272-9829. Ohio jurisdiction code: 6446. Discover, Visa, MasterCard, and American Express accepted. Convenience fee applies.
• Mail: Use Form IT 40P and send to: Ohio Department of Taxation, P.O. Box 182131, Columbus, OH 43218-2131.

Ohio's failure-to-file penalty is the greater of 5% of unpaid tax per month (up to 50%) or $50 per month (up to $500)—one of the highest filing penalties in the country. The failure-to-pay penalty is twice the applicable interest. These steep penalties make timely filing and payment especially critical in Ohio.

• File IRS Form 4868 to secure your federal extension.
• Pay Ohio income tax owed by April 15, 2026, using the free e-check option at tax.ohio.gov.
• Check the box on Ohio IT 1040 and include a copy of Form 4868 when filing your return by October 15.
• Ohio's failure-to-file penalty is among the steepest in the U.S.—do not miss the October 15 deadline.

Ohio's extension is automatic with a federal extension, but the failure-to-file penalty can reach 50% of unpaid tax. Pay by April 15, check the required box and include Form 4868 on your IT 1040, and file by October 15, 2026.

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