1099 Contractor in Kentucky with a South Dakota Client: Where Do You File?
Answer
The client's state is irrelevant here twice over. South Dakota does not tax personal income, and even if it did, a client's mailing address does not by itself source your income to that state. Kentucky taxes the profit as resident income.
Last verified
Self-employment income from personal services is sourced to the place where the services are performed. You perform them in Kentucky; South Dakota would have no claim even if it levied an income tax, which it does not.
What you file
- 1Quarterly estimated payments · Kentucky
Make quarterly estimated payments to Kentucky Department of Revenue — nothing is withheld from a 1099.
- 2Resident return · Kentucky
File a Kentucky resident return reporting your full self-employment income.
The two states, side by side
| Kentucky | South Dakota | |
|---|---|---|
| Taxes wages | Yes — flat | No |
| Reciprocity partners | 7 (Form 42A809) | None |
| Convenience rule | No | No |
| Nonresident return | Form 740-NP | Not applicable |
| Credit for other-state tax | Schedule ITC | No income tax |
| Nonresident safe harbour | None published | Not applicable |
| Local income tax | Yes | No |
| Revenue department | Kentucky Department of Revenue | South Dakota Department of Revenue |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in South Dakota and working in Kentucky gives:Client state only, 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: Kentucky → South DakotaHome state only
- Remote worker: Kentucky → South DakotaHome state only
- Moved mid-year: Kentucky → South DakotaOne part-year return — the state you left
Other Kentucky pairs
Questions people actually ask
I live in Kentucky and my client is in South Dakota. Do I have to file a South Dakota tax return?
The client's state is irrelevant here twice over. South Dakota does not tax personal income, and even if it did, a client's mailing address does not by itself source your income to that state. Kentucky taxes the profit as resident income.
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 Kentucky and South Dakota hold an agreement makes no difference to a self-employed filer — sourcing rules decide the answer instead.
How current is this?
The Kentucky and South Dakota rules on this page were last checked against Kentucky Department of Revenue and South Dakota 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.
- Kentucky Department of Revenue — individual income taxaccessed 2026-08-07
- South Dakota Department of Revenue — individual income taxaccessed 2026-08-07