No — DC taxes residents, not workers. If you work in DC but live in Maryland or Virginia, you do not owe DC income tax. However, you owe income tax to your state of residence on all income. Maryland and Virginia both tax DC workers and allow credits for any DC taxes paid (though DC shouldn't apply if you're a non-resident). We file all required returns correctly.

The Defense Contract Audit Agency (DCAA) audits government contractor billing, indirect cost rates, and accounting systems. Contractors must maintain a DCAA-approved accounting system, segregate direct and indirect costs, and comply with FAR (Federal Acquisition Regulation) billing rules. Non-compliance risks contract termination and repayment demands. We advise contractors on DCAA-compliant accounting from the start.

It depends on your status. US citizens and permanent residents employed by international organizations like the World Bank or IMF generally owe US income tax on their worldwide income, though treaty provisions and specific exemptions may apply to certain allowances. Non-US nationals may be fully exempt. Your specific situation requires analysis — we handle international organization employee returns regularly.

Yes — DC imposes an unincorporated business tax (UBT) at 9.975% on unincorporated businesses (partnerships, sole proprietors) with DC-source income above $12,000. DC-based consultants, lobbyists, and service professionals commonly owe this in addition to their individual income tax. S-corps and C-corps are exempt from UBT but face DC's corporate franchise tax instead. We determine which structure is more advantageous.