Ohio Tax Calculators & Guides

Welcome to our Ohio Tax & Payroll hub. Navigate the complexities of Ohio municipal income tax, school district income tax (SDIT), the 20-day payroll rule, RITA penalties, local tax credits, and reciprocity — all in one place. Every calculator is built from official Ohio Revised Code sources and updated for 2026 rates.

Ohio is one of the few states where most employers must deal with municipal income tax in addition to state tax. Every city and village that levies the tax sets its own rate (commonly 1% to 2.5%), imposes its own filing rules, and decides how withholding works for residents versus nonresidents. Add school district income tax in the districts that levy it, and payroll teams quickly face a patchwork of rates and deadlines that a single federal-style calculator cannot handle.

The tools below cover the situations that create the most confusion and penalties: when withholding actually begins under the 20-day rule, how late-filing penalties accrue under ORC 718.27, which RITA form to file for a refund, how to claim the credit for tax paid to another city, how reciprocity works, and what wage garnishment limits apply. For payroll, overtime, and labor questions in other states, see the New York Calculators and the USA Calculators hub.

Ohio Calculators

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Ohio Paycheck Calculator 2026

Calculate your exact Ohio take-home pay with federal, state (2.75% flat), and 600+ municipal tax rates. Includes work-city credit calculator.

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RITA Form 37 Refund Calculator

Estimate your RITA municipal income tax refund instantly. Learn whether to file Form 37 or Form 10A for employer over-withholding vs. estimated tax overpayments.

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Ohio 20-Day Payroll Rule Calculator

Determine whether an employee has reached the 20-day withholding threshold under ORC 718.011 and when withholding must begin. Free tool for Ohio employers.

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Ohio Employer Municipal Tax Late Penalty Calculator

Calculate late filing and late payment penalties for Ohio municipal income tax under ORC 718.27. Includes interest accrual estimates.

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Ohio Local Income Tax Credit Calculator

Calculate your Ohio municipal income tax credit for taxes paid to other cities. Handles partial-year residency and reciprocal agreements.

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Ohio Local Tax Reciprocity Credit Calculator

Estimate your Ohio reciprocal tax credit when working in one city but living in another. Updated for 2026 rates across all Ohio municipalities.

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RITA Penalty & Interest Calculator

Estimate penalties and interest on overdue Ohio municipal tax balances administered by RITA. Covers late filing, late payment, and interest under ORC 718.27.

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Ohio School District Income Tax Calculator

Find your school district and calculate your 2026 SDIT liability. Supports all 210+ districts with rates from 0.25% to 2.0%, plus part-year residency.

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Ohio Wage Garnishment Calculator

See exactly how much your employer can withhold under CCPA limits: 25% or income above $217.50/week. Includes 5 ways to stop garnishment.

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Frequently Asked Questions

Does Ohio have municipal income tax in addition to state income tax?

Yes. Ohio is one of the few states where employers commonly withhold municipal income tax in addition to state tax. Most Ohio cities and villages levy their own income tax on wages, typically at 1% to 2.5%. Residents pay tax to their home city on all earned income, while nonresidents pay to the city where they work — with credits and reciprocity reducing double taxation. Use the Ohio Local Income Tax Credit Calculator to see the effect.

What is Ohio's 20-day payroll rule?

Under Ohio Revised Code §718.011, an employer generally does not have to withhold municipal income tax for an employee until the employee has worked 20 or more days in the municipality within a calendar year. Once that threshold is crossed, withholding begins. The Ohio 20-Day Payroll Rule Calculator tells you exactly when each employee reaches the threshold.

What is RITA?

RITA (the Regional Income Tax Agency) is a cooperative that handles municipal income tax administration for hundreds of Ohio member municipalities. It collects taxes, processes returns and refunds, and enforces penalties for its member cities. If your employer's city uses RITA, your filings, penalty notices, and refunds go through RITA forms — such as Form 37 for refunds — rather than the city directly.

Can I get a refund if too much municipal tax was withheld in Ohio?

Yes. If your employer over-withheld or withheld to the wrong municipality, you can claim a refund from the taxing city. With RITA-member cities, the standard path is Form 37 (for employer over-withholding) or the return itself when you file. The RITA Form 37 Refund Calculator estimates your refund and tells you which form to use.

📅 Sources: Ohio Revised Code, Ohio Dept. of Taxation, RITA ✍️ Verified by AKCalc Financial Team