Local guides / Ohio / Cincinnati
Consultants in Cincinnati, OH: taxes and retirement for 2026
For independent consultants and fractional executives billing clients directly in Cincinnati, OH. Ohio has a flat 2.75% state income tax for 2026. Cincinnati adds a local income tax. Here are the 2026 rules, a worked example and the official sources.
What's different in Cincinnati
- Local income tax
- City of Cincinnati Income Tax: 1.8% for residents, 1.8% for nonresidents (effective October 2, 2020 (was 2.1% before that date)). Self-employment net profits are taxed at 1.8%. Every resident engaged in business, including sole proprietorships (federal Schedule C), partnerships, rentals, and short-term rentals, must file a Cincinnati return whether or not tax is due. Residents get a credit of up to 1.8% for local tax paid to another city.
- Also worth knowing
- Nonresidents who do business in Cincinnati, or earn pay there without Cincinnati tax withheld, must file a return whether or not tax is due. The Cincinnati City School District does not levy a school district income tax; it is not on the Ohio Department of Taxation's 2026 list of taxing school districts (https://dam.assets.ohio.gov/image/upload/tax.ohio.gov/employer_withholding/2025-2026%20NYP%20Updates/School_Districts_2026.pdf).
Ohio rules for consultants
- State income tax (2026)
- Ohio has a flat 2.75% state income tax for 2026. For tax years beginning in 2026 and later, the first $26,050 of nonbusiness income (after exemptions) is untaxed. Above that, tax is $332 plus 2.75% of the excess (R.C. 5747.02(A)(3)(c), as amended by HB 96). The 3.125% bracket that applied above $100,000 in 2025 is gone. Business income has its own rules: the first $250,000 is deducted ($125,000 per spouse filing separately; R.C. 5747.01(A)(28)), and the rest is taxed at a flat 3% (R.C. 5747.02(A)(4)).
- State estimated tax
- Ohio law requires estimated payments if your estimated Ohio tax (combined state and school district income tax), less Ohio withholding, is more than $500 (R.C. 5747.09). The Department of Taxation says sole proprietors and other business owners should generally make estimated payments. Same dates as federal (April 15, June 15, September 15, 2026 and January 15, 2027). By statute (R.C. 5747.09), cumulative payments must reach 22.5%, 45%, 67.5%, and 90% of the year's liability. Form Pay electronically, or by check or money order with the Ohio Universal Payment Coupon (OUPC).
- Ohio Commercial Activity Tax (CAT)
- A 0.26% tax (2.6 mills, R.C. 5751.03) on taxable gross receipts above an annual exclusion amount, which has been $6 million since 2025. Most small sole proprietors and single-member LLCs fall below the exclusion and owe no CAT.
- Municipal income tax (local, R.C. Chapter 718)
- Ohio cities and villages may levy an annual income tax on everyone living or earning income there, measured by municipal taxable income. Each city sets its own rate, so local filing is often required on top of the state return.
- Construction workers' compensation coverage test (R.C. 4123.01(A)(1)(c))
- For workers' compensation, a person doing labor or services under a construction contract is treated as an employee if at least 10 of 20 listed control factors apply. Examples include following the other party's instructions, set hours, and tools supplied by the other party.
Federal rules for 2026
Solo 401(k) up to $72,000
A one-person consultancy can contribute a $24,500 employee deferral plus an employer share of about 20% of net self-employment earnings, up to $72,000 in 2026, plus an $8,000 catch-up at 50 or older ($11,250 at ages 60 to 63).
The S-corp trade-off
Electing S-corp status can cut payroll tax, but the salary you pay yourself also sets your Solo 401(k) room. Run both sides before you elect.
Quarterly estimated taxes
No one withholds tax from self-employment income, so you generally pay estimates four times a year if you expect to owe $1,000 or more. For 2026 income the federal dates are April 15, June 15 and September 15, 2026, and January 15, 2027. Paying 100% of last year's tax (110% if your AGI was over $150,000) in four equal installments avoids the underpayment penalty.
Self-employment tax
On top of income tax, self-employed people pay 15.3% on 92.35% of net profit: 12.4% Social Security up to the 2026 wage base of $184,500, plus 2.9% Medicare with no cap. Half of it is deductible.
A worked example
| Self-employment tax (sole proprietor) | $21,194 |
|---|---|
| Solo 401(k) maximum | $52,381 |
| SEP IRA maximum | $27,881 |
| Payroll tax saved as an S-corp on a $75,000 salary | $9,719 |
| Solo 401(k) maximum as that S-corp | $43,250 |
Federal figures only, before state and local taxes. Simplified: excludes the QBI deduction and the 0.9% Additional Medicare Tax. Computed from 2026 IRS limits (Notice 2025-67, Rev. Proc. 2025-32) and the SSA wage base.
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Questions
Is there a local income tax in Cincinnati?
Yes. City of Cincinnati Income Tax is 1.8% for residents and 1.8% for nonresidents (effective October 2, 2020 (was 2.1% before that date)). Self-employment net profits are taxed at 1.8%. Every resident engaged in business, including sole proprietorships (federal Schedule C), partnerships, rentals, and short-term rentals, must file a Cincinnati return whether or not tax is due. Residents get a credit of up to 1.8% for local tax paid to another city.
Do consultants in Ohio pay state income tax?
Ohio has a flat 2.75% state income tax for 2026. For tax years beginning in 2026 and later, the first $26,050 of nonbusiness income (after exemptions) is untaxed. Above that, tax is $332 plus 2.75% of the excess (R.C. 5747.02(A)(3)(c), as amended by HB 96). The 3.125% bracket that applied above $100,000 in 2025 is gone. Business income has its own rules: the first $250,000 is deducted ($125,000 per spouse filing separately; R.C. 5747.01(A)(28)), and the rest is taxed at a flat 3% (R.C. 5747.02(A)(4)).
When are Ohio estimated tax payments due for 2026?
Ohio law requires estimated payments if your estimated Ohio tax (combined state and school district income tax), less Ohio withholding, is more than $500 (R.C. 5747.09). The Department of Taxation says sole proprietors and other business owners should generally make estimated payments. Same dates as federal (April 15, June 15, September 15, 2026 and January 15, 2027). By statute (R.C. 5747.09), cumulative payments must reach 22.5%, 45%, 67.5%, and 90% of the year's liability. The state form is Pay electronically, or by check or money order with the Ohio Universal Payment Coupon (OUPC).
Are there other Ohio taxes for self-employed consultants?
Ohio Commercial Activity Tax (CAT): A 0.26% tax (2.6 mills, R.C. 5751.03) on taxable gross receipts above an annual exclusion amount, which has been $6 million since 2025. Most small sole proprietors and single-member LLCs fall below the exclusion and owe no CAT. Municipal income tax (local, R.C. Chapter 718): Ohio cities and villages may levy an annual income tax on everyone living or earning income there, measured by municipal taxable income. Each city sets its own rate, so local filing is often required on top of the state return.
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Sources
- codes.ohio.gov/ohio-revised-code/section-5747.02
- tax.ohio.gov/individual/payments/estimated-payments
- dam.assets.ohio.gov/image/upload/com.ohio.gov/DICO/WageAndHour/2026_Minumum_Wage_Poster.pdf
- codes.ohio.gov/ohio-revised-code/section-5751.01
- codes.ohio.gov/ohio-revised-code/section-718.04
- codes.ohio.gov/ohio-revised-code/section-4123.01
- www.cincinnati-oh.gov/finance/income-taxes/
State and local facts researched from official sources and independently re-checked; last verified October 2026, next scheduled review 2027-01-02. Educational information for 2026, not tax, legal or investment advice. Rules change; check the official sources listed and a tax professional for your situation. Gigaverse AI, Inc. is a financial technology company, not a bank, and not itself a registered investment adviser or broker-dealer.