Ohio Quarterly Tax Calculator
Calculate your estimated quarterly tax payments for federal and Ohio state taxes. Designed for self-employed individuals, freelancers, and independent contractors.
OH State Tax: Flat 3.5%
Quarterly Payment Amount
$6,244
Per quarter (4 remaining)
Annual Tax Breakdown
2026 Payment Schedule
Jan 1 - Mar 31
Due: April 15, 2026
$6,244
Apr 1 - May 31
Due: June 15, 2026
$6,244
Jun 1 - Aug 31
Due: September 15, 2026
$6,244
Sep 1 - Dec 31
Due: January 15, 2027
$6,244
Don't miss your quarterly payments!
The IRS may charge penalties and interest if you underpay or pay late. Consider setting up automatic payments or calendar reminders.
Ohio Quarterly Tax Highlights
Ohio has a flat 3.5% income tax rate
First $26,050 of income is exempt
Many cities have additional local income tax
Ohio Quarterly Tax FAQ
What is Ohio's income tax rate?
Ohio has a flat 3.5% income tax rate on income over $26,050. Many Ohio cities also impose local income taxes ranging from 0.5% to 3%.
Ohio Estimated Quarterly Tax Payments for Self-Employed Workers in 2026
Self-employed workers in Ohio face two tax obligations: federal estimated taxes filed with the IRS and state estimated taxes filed with the Ohio Department of Taxation. Ohio imposes a flat 3.5% income tax rate on all taxable income. If you expect to owe $500 or more in Ohio state income tax after withholding and credits, you must make quarterly estimated payments using Form IT 1040ES.
Ohio exempts the first $26,050 of income from state tax, effectively making the flat rate apply only to income above that threshold. Many Ohio cities also impose a local income tax (called a municipal income tax) ranging from 0.5% to 3%, which self-employed individuals must pay where they work or reside.
| Tax Layer | Rate / Range | Filed With | Form |
|---|---|---|---|
| Federal income tax | 10% – 37% | IRS | 1040-ES |
| Self-employment tax | 15.3% | IRS | 1040-ES / SE |
| Ohio state income tax | 3.5% | Ohio Department of Taxation | Form IT 1040ES |
How Ohio's Flat 3.5% Income Tax Affects Your Quarterly Payments
Ohio uses a flat tax rate of 3.5%, which simplifies quarterly tax calculations. Regardless of income level, every dollar of taxable income is taxed at the same rate. This makes it straightforward to estimate your state quarterly payments — simply multiply your projected net self-employment income by 3.5% and divide by four.
For a single self-employed worker in Ohio earning $100,000 in net self-employment income, the estimated annual tax breakdown is:
| Tax Component | Estimated Amount | Calculation Basis |
|---|---|---|
| Federal income tax | ~$11,600 | After $15,700 standard deduction, 2026 brackets |
| Self-employment tax | ~$14,130 | 15.3% on 92.35% of net earnings |
| Ohio state income tax | ~$3,500 | 3.5% flat rate |
| Total annual tax | ~$29,230 | |
| Quarterly payment | ~$7,308 | Total / 4 quarters |
State payments can be made online through the Ohio Department of Taxation portal at tax.ohio.gov, by mail with a Form IT 1040ES voucher, or via electronic funds transfer where available.
Federal Self-Employment Tax and Quarterly Due Dates
All self-employed workers must pay federal self-employment (SE) tax of 15.3% on 92.35% of net earnings. This consists of 12.4% for Social Security (on earnings up to $184,500 in 2026) and 2.9% for Medicare (no cap). An additional 0.9% Medicare surtax applies to earnings above $200,000 (single filers).
Both Ohio and federal estimated tax payments follow the same quarterly schedule:
| Quarter | Income Period | Due Date |
|---|---|---|
| Q1 | January 1 – March 31 | April 15, 2026 |
| Q2 | April 1 – May 31 | June 15, 2026 |
| Q3 | June 1 – August 31 | September 15, 2026 |
| Q4 | September 1 – December 31 | January 15, 2027 |
To avoid underpayment penalties, pay at least 100% of your prior-year tax liability (or 110% if your AGI exceeds $150,000) spread across four equal payments, or at least 90% of your current-year tax. You can deduct 50% of your self-employment tax from your adjusted gross income, reducing both your federal and Ohio taxable income.
Related Calculators
Official References
This calculator uses current federal and Ohio tax rates and schedules:
- IRS Estimated Tax Guidelines
Federal quarterly tax requirements and Form 1040-ES
- Ohio Department of Taxation
Official Ohio tax authority
- IRS Self-Employment Tax
Social Security and Medicare tax information
This calculator provides estimates based on 2026 tax rates. Your actual tax liability may vary based on deductions, credits, and other factors. Consult a tax professional for personalized advice.