1099 Contractor in New Jersey with a Missouri Client: Where Do You File?
Answer
Pay New Jersey by instalments, and watch your Missouri days. Reciprocity agreements do not help here: every one of them covers wage withholding, and a 1099 has no withholding to switch off. New Jersey taxes the full profit, Missouri taxes the on-site share, and the New Jersey credit reconciles them.
Last verified
The client's location is the wrong thing to track. What matters is where you were sitting when you did the work — which is why a contractor's exposure to Missouri is measured in days on the ground rather than in invoices sent.
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
- 1Quarterly estimated payments · New Jersey
Make quarterly estimated payments to New Jersey Division of Taxation on your full self-employment income — nothing is withheld from a 1099.
- 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.
- 3Resident return · New JerseySchedule NJ-COJ
File the New Jersey resident return last and claim the credit for any tax paid to Missouri.
The two states, side by side
| New Jersey | Missouri | |
|---|---|---|
| Taxes wages | Yes — graduated | Yes — graduated |
| Reciprocity partners | 1 (Form NJ-165) | None |
| Convenience rule | Only against convenience-rule states | No |
| Nonresident return | Form NJ-1040NR | Form MO-1040 with Form MO-NRI |
| Credit for other-state tax | Schedule NJ-COJ | Form MO-CR |
| Nonresident safe harbour | None published | None published |
| Local income tax | No | Yes |
| Revenue department | New Jersey Division of Taxation | Missouri Department of Revenue |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Missouri and working in New Jersey gives:Home state, plus the client state if you work there.
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.
- W-2 commuter: New Jersey → MissouriBoth states — credit offsets the double tax
- Remote worker: New Jersey → MissouriHome state only
- Moved mid-year: New Jersey → MissouriTwo part-year returns
Other New Jersey pairs
Questions people actually ask
I live in New Jersey and my client is in Missouri. Do I have to file a Missouri tax return?
Pay New Jersey by instalments, and watch your Missouri days. Reciprocity agreements do not help here: every one of them covers wage withholding, and a 1099 has no withholding to switch off. New Jersey taxes the full profit, Missouri taxes the on-site share, and the New Jersey 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 New Jersey and Missouri hold an agreement makes no difference to a self-employed filer — sourcing rules decide the answer instead.
How current is this?
The New Jersey and Missouri rules on this page were last checked against New Jersey Division of Taxation 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.
- New Jersey Division of Taxation — individual income taxaccessed 2026-08-07
- New Jersey Division of Taxation — Convenience of the Employer Ruleaccessed 2026-08-07
- Missouri Department of Revenue — individual income taxaccessed 2026-08-07