How to Complete and Submit Ohio IT-501: Employer Withholding Payment

Ohio Form IT-501 is the return an employer uses to remit state income tax withheld from employee paychecks to the Ohio Department of Taxation. You file it on a schedule tied to how much you withhold — quarterly, monthly, or partial-weekly — and since 2023, electronic filing is required for nearly all employers.¹ Each IT-501 covers a single reporting period; a separate annual reconciliation on Form IT-941 closes out the year.²

Which Filing Schedule Applies to You

Ohio Revised Code 5747.07 sorts employers into four tiers based on the total tax you withheld, or were required to withhold, during the twelve months ending June 30 of the preceding calendar year.³ That look-back window, not the current year’s payroll, sets your schedule.

Quarterly

Under $2,000 withheld in the look-back period. Payment is due by the last day of the month following each quarter: April 30, July 31, October 31, and January 31.³

Monthly

$2,000 or more but under $84,000. Payment is due within 15 days after the end of the month in which the tax was withheld.³

Partial-Weekly

$84,000 or more. Each week splits into two periods (Saturday through Tuesday, and Wednesday through Friday), and payment is due within three banking days after each period ends. Partial-weekly filers must pay by electronic funds transfer.³

Next-Day

If your accumulated withholding reaches $100,000 or more during any single partial-weekly period, payment is due by the close of the next banking day, regardless of your normal schedule. Electronic payment is required.³

What Goes on the Form

The IT-501 itself is short. You need three things:

Your Ohio withholding account number.
The period end date for the reporting window — the last day of the month or quarter you’re reporting, or the end of the partial-weekly period. A wrong date can post the payment to the wrong period and cause reconciliation problems later.
The total Ohio state income tax withheld during that period.

Do not fold school district withholding or any other tax into the IT-501 amount. School district tax has its own form.

If you did not withhold any Ohio income tax during a period, you do not need to file an IT-501 for that period. The electronic system only processes the form when a payment is included.¹

How to File and Pay

Electronic filing and payment is required for all IT-501s unless the Department of Taxation has approved you for an opt-out.¹ File and pay through OH|TAX eServices, which is also accessible through the Ohio Business Gateway.⁴

Credit and debit card payments are accepted through ACI Payments, Inc. On the ACI site, choose State Payments, then Ohio, then Ohio Business Taxes, then Form IT-501.⁵ ACI charges a processing fee.

After you submit, save the confirmation number or receipt and check your bank within a few business days to confirm the debit posted for the correct amount. That confirmation is your proof of timely payment if a question comes up later.

Penalties and Interest If You File or Pay Late

Ohio treats late filing and late payment as separate problems, each with its own penalty. Miss the filing deadline and the penalty is the greater of $50 per month (up to $500) or 5 percent per month of the tax due (up to 50 percent).⁶ For small employers the $50 floor drives the number; for larger ones the percentage does.

File on time but pay late and a separate penalty applies of up to twice the interest that accrued on the delinquent amount.⁶ The 2026 annual interest rate on most overdue Ohio taxes is 7 percent, roughly 0.58 percent per month. The Tax Commissioner sets the rate each year by adding three percentage points to the federal short-term rate in effect during July.⁷

The two penalties can stack on a return that is both late-filed and late-paid.

The Year-End Reconciliation on Form IT-941

Filing your IT-501s does not finish the year. By January 31 of the following year, you must file Form IT-941, which reconciles all Ohio income tax withheld during the calendar year against the W-2s and 1099s you issued.² The total tax withheld on the IT-941 must match the sum reported on the W-2s and 1099s submitted to the state.

If you discontinue the business mid-year, the IT-941 is due within 15 days of discontinuation rather than the following January 31. Mismatches among your IT-501 payments, your IT-941, and your W-2 filings are a common source of Department of Taxation notices, so reconcile your payroll records before you file.

School District Withholding Is a Separate Form

If any employee lives in a taxing school district, you must also withhold Ohio school district income tax and remit it on Form SD 101, which follows the same schedule and electronic filing rules as the IT-501.¹ Use Ohio’s “The Finder” to look up whether a given address is in a taxing district and what the rate is.⁸ Keep school district amounts separate from state withholding in your payroll records; combining them on one form creates reconciliation problems at year-end.

1
Ohio Department of Taxation. New Electronic Filing Requirement for IT 501s and SD 101s
2
Ohio Department of Taxation. Employer Withholding
3
Ohio Legislative Service Commission. Ohio Revised Code 5747.07 – Employers to File Return and Pay Withholding
4
Ohio Department of Taxation. Business Registration
5
Ohio Department of Taxation. Business Tax – Electronic Payments
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Ohio Legislative Service Commission. Ohio Revised Code 5747.15 – Failure to File or Remit Tax
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Ohio Department of Taxation. Interest Rates
8
Ohio Department of Taxation. The Finder – School District Income Tax