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1099 Contractor in Maine with a Missouri 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 Maine, which taxes residents on all self-employment income and expects quarterly estimated payments. The possibility is Missouri, 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.

Missouri publishes no de minimis day count or dollar floor for nonresidents. Any Missouri-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 Missouri Department of Revenue nonresident instructions before filing.

What you file

  1. 1Quarterly estimated payments · Maine

    Make quarterly estimated payments to Maine Revenue Services on your full self-employment income — nothing is withheld from a 1099.

  2. 2Nonresident return · MissouriForm MO-1040 with Form MO-NRI

    File a Missouri nonresident return only if you performed services inside Missouri. Missouri publishes no de minimis day count or dollar floor for nonresidents. Any Missouri-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 Missouri Department of Revenue nonresident instructions before filing.

  3. 3Resident return · MaineForm 1040ME Schedule A

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

The two states, side by side

 MaineMissouri
Taxes wagesYes — graduatedYes — graduated
Reciprocity partnersNoneNone
Convenience ruleNoNo
Nonresident returnForm 1040ME with Schedule NRForm MO-1040 with Form MO-NRI
Credit for other-state taxForm 1040ME Schedule AForm MO-CR
Nonresident safe harbour12 days or a dollar floorNone published
Local income taxNoYes
Revenue departmentMaine Revenue ServicesMissouri Department of Revenue
Last verified

The other direction

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

Missouri to Maine →

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 Maine pairs

Questions people actually ask

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

Two possible returns, one certainty. The certainty is Maine, which taxes residents on all self-employment income and expects quarterly estimated payments. The possibility is Missouri, 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 Maine and Missouri hold an agreement makes no difference to a self-employed filer — sourcing rules decide the answer instead.

How current is this?

The Maine and Missouri rules on this page were last checked against Maine Revenue Services and Missouri Department of Revenue 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.