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1099 Contractor in South Carolina with a Oklahoma Client: Where Do You File?

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

Answer

Pay South Carolina by instalments, and watch your Oklahoma days. Reciprocity agreements do not help here: every one of them covers wage withholding, and a 1099 has no withholding to switch off. South Carolina taxes the full profit, Oklahoma taxes the on-site share, and the South Carolina credit reconciles them.

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.

Oklahoma publishes no de minimis day count or dollar floor for nonresidents. Any Oklahoma-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 Oklahoma Tax Commission nonresident instructions before filing.

What you file

  1. 1Quarterly estimated payments · South Carolina

    Make quarterly estimated payments to South Carolina Department of Revenue on your full self-employment income — nothing is withheld from a 1099.

  2. 2Nonresident return · OklahomaForm 511-NR

    File a Oklahoma nonresident return only if you performed services inside Oklahoma. Oklahoma publishes no de minimis day count or dollar floor for nonresidents. Any Oklahoma-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 Oklahoma Tax Commission nonresident instructions before filing.

  3. 3Resident return · South CarolinaForm SC1040TC

    File the South Carolina resident return last and claim the credit for any tax paid to Oklahoma.

The two states, side by side

 South CarolinaOklahoma
Taxes wagesYes — graduatedYes — graduated
Reciprocity partnersNoneNone
Convenience ruleNoNo
Nonresident returnForm SC1040 with Schedule NRForm 511-NR
Credit for other-state taxForm SC1040TCForm 511-TX
Nonresident safe harbourNone publishedNone published
Local income taxNoNo
Revenue departmentSouth Carolina Department of RevenueOklahoma Tax Commission
Last verified

The other direction

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

Oklahoma to South Carolina →

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 South Carolina pairs

Questions people actually ask

I live in South Carolina and my client is in Oklahoma. Do I have to file a Oklahoma tax return?

Pay South Carolina by instalments, and watch your Oklahoma days. Reciprocity agreements do not help here: every one of them covers wage withholding, and a 1099 has no withholding to switch off. South Carolina taxes the full profit, Oklahoma taxes the on-site share, and the South Carolina credit reconciles them.

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 South Carolina and Oklahoma hold an agreement makes no difference to a self-employed filer — sourcing rules decide the answer instead.

How current is this?

The South Carolina and Oklahoma rules on this page were last checked against South Carolina Department of Revenue and Oklahoma Tax Commission 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.