1099 Contractor in District of Columbia with a Maryland Client: Where Do You File?
Answer
The client's location does not decide this. Self-employment income from personal services is sourced to where the work happens, so working from District of Columbia keeps it District of Columbia-source and District of Columbia-taxed. Travel to Maryland to work and that portion becomes Maryland-source, needing a Maryland nonresident return.
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.
Maryland publishes no de minimis day count or dollar floor for nonresidents. Any Maryland-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 Comptroller of Maryland nonresident instructions before filing.
What you file
- 1Quarterly estimated payments · District of Columbia
Make quarterly estimated payments to District of Columbia Office of Tax and Revenue on your full self-employment income — nothing is withheld from a 1099.
- 2Nonresident return · MarylandForm 505 with Form 505NR
File a Maryland nonresident return only if you performed services inside Maryland. Maryland publishes no de minimis day count or dollar floor for nonresidents. Any Maryland-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 Comptroller of Maryland nonresident instructions before filing.
- 3Resident return · District of ColumbiaSchedule U (Form D-40)
File the District of Columbia resident return last and claim the credit for any tax paid to Maryland.
The two states, side by side
| District of Columbia | Maryland | |
|---|---|---|
| Taxes wages | Yes — graduated | Yes — graduated |
| Reciprocity partners | 2 (Form D-4A) | 4 (Form MW507) |
| Convenience rule | No | No |
| Nonresident return | None — nonresidents exempt | Form 505 with Form 505NR |
| Credit for other-state tax | Schedule U (Form D-40) | Form 502CR |
| Nonresident safe harbour | Not applicable | None published |
| Local income tax | No | Yes |
| Revenue department | District of Columbia Office of Tax and Revenue | Comptroller of Maryland |
| Last verified |
The other direction
Reversing the commute does not always reverse the answer. Living in Maryland and working in District of Columbia 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: District of Columbia → MarylandReciprocal agreement — file the exemption form
- Remote worker: District of Columbia → MarylandHome state only
- Moved mid-year: District of Columbia → MarylandTwo part-year returns
Other District of Columbia pairs
Questions people actually ask
I live in District of Columbia and my client is in Maryland. Do I have to file a Maryland tax return?
The client's location does not decide this. Self-employment income from personal services is sourced to where the work happens, so working from District of Columbia keeps it District of Columbia-source and District of Columbia-taxed. Travel to Maryland to work and that portion becomes Maryland-source, needing a Maryland nonresident return.
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 District of Columbia and Maryland hold an agreement makes no difference to a self-employed filer — sourcing rules decide the answer instead.
How current is this?
The District of Columbia and Maryland rules on this page were last checked against District of Columbia Office of Tax and Revenue and Comptroller of Maryland 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.
- District of Columbia Office of Tax and Revenue — individual income taxaccessed 2026-08-07
- Comptroller of Maryland — individual income taxaccessed 2026-08-07
- Maryland — Form MW507accessed 2026-08-07