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1099 Contractor in California with a Ohio Client: Where Do You File?

Home state, plus the client state if you work thereNo withholding — 1099

Answer

California taxes all of it; Ohio taxes only what you earn on its soil. Nothing is withheld from a 1099, so you pay California quarterly. A Ohio client alone creates no Ohio filing obligation — performing services inside Ohio does, and California then credits that tax.

Last verified

Reciprocity agreements are the first thing contractors ask about and the first thing that does not apply to them. Every agreement in the country is a wage-withholding arrangement, and a 1099 has no withholding to switch off.

Ohio publishes no de minimis day count or dollar floor for nonresidents. Any Ohio-source wage income above the state's general filing threshold requires a nonresident return, and that threshold is reset each year — check the current figure on the Ohio Department of Taxation nonresident instructions before filing.

What you file

  1. 1Quarterly estimated payments · California

    Make quarterly estimated payments to California Franchise Tax Board on your full self-employment income — nothing is withheld from a 1099.

  2. 2Nonresident return · OhioForm IT 1040 with Schedule IT NRC

    File a Ohio nonresident return only if you performed services inside Ohio. Ohio publishes no de minimis day count or dollar floor for nonresidents. Any Ohio-source wage income above the state's general filing threshold requires a nonresident return, and that threshold is reset each year — check the current figure on the Ohio Department of Taxation nonresident instructions before filing.

  3. 3Resident return · CaliforniaSchedule S

    File the California resident return last and claim the credit for any tax paid to Ohio.

The two states, side by side

 CaliforniaOhio
Taxes wagesYes — graduatedYes — graduated
Reciprocity partnersNone5 (Form IT 4NR)
Convenience ruleNoNo
Nonresident returnForm 540NRForm IT 1040 with Schedule IT NRC
Credit for other-state taxSchedule SOhio Schedule of Credits (resident credit)
Nonresident safe harbourNone publishedNone published
Local income taxNoYes
Revenue departmentCalifornia Franchise Tax BoardOhio Department of Taxation
Last verified

The other direction

Reversing the commute does not always reverse the answer. Living in Ohio and working in California gives:Home state, plus the client state if you work there.

Ohio to California →

Same two states, different situation

The withholding answer turns on how you are paid and where the work happens, not only on which two states are involved.

Other California pairs

Questions people actually ask

I live in California and my client is in Ohio. Do I have to file a Ohio tax return?

California taxes all of it; Ohio taxes only what you earn on its soil. Nothing is withheld from a 1099, so you pay California quarterly. A Ohio client alone creates no Ohio filing obligation — performing services inside Ohio does, and California then credits that tax.

Do reciprocity agreements help a 1099 contractor?

No. Every state reciprocity agreement in the country is an arrangement about wage withholding between two revenue departments, and a 1099 has no withholding to switch off. Whether California and Ohio hold an agreement makes no difference to a self-employed filer — sourcing rules decide the answer instead.

How current is this?

The California and Ohio rules on this page were last checked against California Franchise Tax Board and Ohio Department of Taxation on 2026-08-07. We re-check the full grid every December after state legislative sessions close, and re-check the convenience-of-the-employer states quarterly because that is where the rules move fastest.

Sources

Every fact above comes from the revenue department that publishes the rule. We do not cite secondary summaries, and we do not restate a figure we could not find at source.