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

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

Answer

Two possible returns, one certainty. The certainty is Missouri, which taxes residents on all self-employment income and expects quarterly estimated payments. The possibility is Oklahoma, which taxes nonresidents on services actually performed inside the state — invoices sent there do not count.

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 · Missouri

    Make quarterly estimated payments to Missouri 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 · MissouriForm MO-CR

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

The two states, side by side

 MissouriOklahoma
Taxes wagesYes — graduatedYes — graduated
Reciprocity partnersNoneNone
Convenience ruleNoNo
Nonresident returnForm MO-1040 with Form MO-NRIForm 511-NR
Credit for other-state taxForm MO-CRForm 511-TX
Nonresident safe harbourNone publishedNone published
Local income taxYesNo
Revenue departmentMissouri 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 Missouri gives:Home state, plus the client state if you work there.

Oklahoma to Missouri →

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 Missouri pairs

Questions people actually ask

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

Two possible returns, one certainty. The certainty is Missouri, which taxes residents on all self-employment income and expects quarterly estimated payments. The possibility is Oklahoma, which taxes nonresidents on services actually performed inside the state — invoices sent there do not count.

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

How current is this?

The Missouri and Oklahoma rules on this page were last checked against Missouri 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.