1099 Contractor in Indiana with a Colorado Client: Where Do You File?
Answer
Two possible returns, one certainty. The certainty is Indiana, which taxes residents on all self-employment income and expects quarterly estimated payments. The possibility is Colorado, 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.
Colorado publishes no de minimis day count or dollar floor for nonresidents. Any Colorado-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 Colorado Department of Revenue — Taxation Division nonresident instructions before filing.
What you file
- 1Quarterly estimated payments · Indiana
Make quarterly estimated payments to Indiana Department of Revenue on your full self-employment income — nothing is withheld from a 1099.
- 2Nonresident return · ColoradoForm DR 0104 with Schedule DR 0104PN
File a Colorado nonresident return only if you performed services inside Colorado. Colorado publishes no de minimis day count or dollar floor for nonresidents. Any Colorado-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 Colorado Department of Revenue — Taxation Division nonresident instructions before filing.
- 3Resident return · IndianaSchedule 6 (Form IT-40PNR)
File the Indiana resident return last and claim the credit for any tax paid to Colorado.
The two states, side by side
| Indiana | Colorado | |
|---|---|---|
| Taxes wages | Yes — flat | Yes — flat |
| Reciprocity partners | 5 (Form WH-47) | None |
| Convenience rule | No | No |
| Nonresident return | Form IT-40PNR | Form DR 0104 with Schedule DR 0104PN |
| Credit for other-state tax | Schedule 6 (Form IT-40PNR) | Form DR 0104CR |
| Nonresident safe harbour | None published | None published |
| Local income tax | Yes | Yes |
| Revenue department | Indiana Department of Revenue | Colorado Department of Revenue — Taxation Division |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Colorado and working in Indiana 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: Indiana → ColoradoBoth states — credit offsets the double tax
- Remote worker: Indiana → ColoradoHome state only
- Moved mid-year: Indiana → ColoradoTwo part-year returns
Other Indiana pairs
Questions people actually ask
I live in Indiana and my client is in Colorado. Do I have to file a Colorado tax return?
Two possible returns, one certainty. The certainty is Indiana, which taxes residents on all self-employment income and expects quarterly estimated payments. The possibility is Colorado, 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 Indiana and Colorado hold an agreement makes no difference to a self-employed filer — sourcing rules decide the answer instead.
How current is this?
The Indiana and Colorado rules on this page were last checked against Indiana Department of Revenue and Colorado Department of Revenue — Taxation Division 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.
- Indiana Department of Revenue — individual income taxaccessed 2026-08-07
- Colorado Department of Revenue — Taxation Division — individual income taxaccessed 2026-08-07