1099 Contractor in Pennsylvania with a Idaho Client: Where Do You File?
Answer
Pennsylvania taxes all of it; Idaho taxes only what you earn on its soil. Nothing is withheld from a 1099, so you pay Pennsylvania quarterly. A Idaho client alone creates no Idaho filing obligation — performing services inside Idaho does, and Pennsylvania then credits that tax.
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.
Idaho publishes no de minimis day count or dollar floor for nonresidents. Any Idaho-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 Idaho State Tax Commission nonresident instructions before filing.
What you file
- 1Quarterly estimated payments · Pennsylvania
Make quarterly estimated payments to Pennsylvania Department of Revenue on your full self-employment income — nothing is withheld from a 1099.
- 2Nonresident return · IdahoForm 43
File a Idaho nonresident return only if you performed services inside Idaho. Idaho publishes no de minimis day count or dollar floor for nonresidents. Any Idaho-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 Idaho State Tax Commission nonresident instructions before filing.
- 3Resident return · PennsylvaniaSchedule G-L
File the Pennsylvania resident return last and claim the credit for any tax paid to Idaho.
The two states, side by side
| Pennsylvania | Idaho | |
|---|---|---|
| Taxes wages | Yes — flat | Yes — flat |
| Reciprocity partners | 6 (Form REV-419) | None |
| Convenience rule | Yes — general rule | No |
| Nonresident return | Form PA-40 (nonresident) | Form 43 |
| Credit for other-state tax | Schedule G-L | Form 39NR |
| Nonresident safe harbour | None published | None published |
| Local income tax | Yes | No |
| Revenue department | Pennsylvania Department of Revenue | Idaho State Tax Commission |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Idaho and working in Pennsylvania 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: Pennsylvania → IdahoBoth states — credit offsets the double tax
- Remote worker: Pennsylvania → IdahoHome state only
- Moved mid-year: Pennsylvania → IdahoTwo part-year returns
Other Pennsylvania pairs
Questions people actually ask
I live in Pennsylvania and my client is in Idaho. Do I have to file a Idaho tax return?
Pennsylvania taxes all of it; Idaho taxes only what you earn on its soil. Nothing is withheld from a 1099, so you pay Pennsylvania quarterly. A Idaho client alone creates no Idaho filing obligation — performing services inside Idaho does, and Pennsylvania then credits that tax.
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 Pennsylvania and Idaho hold an agreement makes no difference to a self-employed filer — sourcing rules decide the answer instead.
How current is this?
The Pennsylvania and Idaho rules on this page were last checked against Pennsylvania Department of Revenue and Idaho 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.
- Pennsylvania Department of Revenue — individual income taxaccessed 2026-08-07
- Pennsylvania — Form REV-419accessed 2026-08-07
- Pennsylvania Personal Income Tax Guide — Income Subject to Tax Withholdingaccessed 2026-08-07
- Idaho State Tax Commission — individual income taxaccessed 2026-08-07