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1099 Contractor in Colorado with a Utah Client: Where Do You File?

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

Answer

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

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

What you file

  1. 1Quarterly estimated payments · Colorado

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

  2. 2Nonresident return · UtahForm TC-40 with Schedule TC-40B

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

  3. 3Resident return · ColoradoForm DR 0104CR

    File the Colorado resident return last and claim the credit for any tax paid to Utah.

The two states, side by side

 ColoradoUtah
Taxes wagesYes — flatYes — flat
Reciprocity partnersNoneNone
Convenience ruleNoNo
Nonresident returnForm DR 0104 with Schedule DR 0104PNForm TC-40 with Schedule TC-40B
Credit for other-state taxForm DR 0104CRSchedule TC-40S
Nonresident safe harbourNone publishedNone published
Local income taxYesNo
Revenue departmentColorado Department of Revenue — Taxation DivisionUtah State Tax Commission
Last verified

The other direction

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

Utah to Colorado →

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 Colorado pairs

Questions people actually ask

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

Pay Colorado by instalments, and watch your Utah days. Reciprocity agreements do not help here: every one of them covers wage withholding, and a 1099 has no withholding to switch off. Colorado taxes the full profit, Utah taxes the on-site share, and the Colorado 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 Colorado and Utah hold an agreement makes no difference to a self-employed filer — sourcing rules decide the answer instead.

How current is this?

The Colorado and Utah rules on this page were last checked against Colorado Department of Revenue — Taxation Division and Utah State 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.