Washington DC has a unique tax environment that every business owner in the District needs to understand. Unlike the 50 states, DC is a federal district with its own tax code separate from any state government. While businesses operating in DC are not subject to a state income tax, they are subject to DC’s own income and franchise tax structure, which can catch uninformed business owners off guard.
Understanding DC’s tax obligations and working with the right financial professionals is essential for staying compliant, minimizing your tax burden, and building a financially healthy business in the District.
Understanding Washington DC Business Taxes
DC Franchise Tax
Washington DC imposes a franchise tax on businesses operating in the District. For corporations (C-corps), the DC corporate franchise tax rate is 8.25% on net income. For unincorporated businesses including LLCs treated as pass-through entities and partnerships, the DC unincorporated business franchise tax rate is 8.5% on net income. These rates apply to businesses with DC nexus, meaning those with operations, employees, or significant economic activity in the District.
DC Personal Income Tax
DC residents are subject to DC personal income tax on all income, including business income flowing through S-corps, partnerships, and single-member LLCs. DC’s individual income tax rates range from 4% to 10.75% depending on income level. High-earning DC business owners should factor this into their tax planning.
DC Sales Tax
The DC general sales tax rate is 6%, with higher rates for certain categories including restaurants (10%), alcohol (10.25%), and parking (18%). Businesses selling taxable goods or services must register for a DC sales tax license through the Office of Tax and Revenue.
DC Office of Tax and Revenue
All DC business tax registrations, filings, and payments are managed through the DC Office of Tax and Revenue (OTR) at otr.cfo.dc.gov. New businesses must register with OTR to obtain a DC tax account number, and ongoing filings include quarterly estimated payments, annual franchise tax returns, and sales tax filings as applicable.
Top Accounting and Financial Services Firms in Washington DC
RSM US (DC Office)
RSM US is one of the largest audit, tax, and consulting firms in the country with a significant Washington DC presence. RSM serves middle-market businesses, government contractors, nonprofits, and professional services firms throughout the DC metropolitan area. Their team has deep expertise in federal contracting compliance, nonprofit accounting, and DC-specific tax matters. A strong choice for growing DC businesses that need a sophisticated accounting partner.
BDO USA (DC Office)
BDO’s Washington DC office provides audit, tax, and advisory services to a diverse client base including technology companies, government contractors, real estate firms, and associations. BDO is particularly well-regarded for its government contracting practice and nonprofit expertise, both highly relevant in the DC market. The firm offers a combination of national resources and local DC market knowledge.
CohnReznick (DC Office)
CohnReznick is a top-20 national accounting firm with a strong DC presence focused on real estate, nonprofits, technology, and government contracting. The firm is particularly known for its real estate advisory and tax work, which is valuable given DC’s active commercial and mixed-use development market. CohnReznick also provides affordable housing and community development expertise relevant to DC’s neighborhood investment landscape.
Aronson LLC (Rockville and DC Area)
Aronson LLC is a DC-area accounting firm with particular strength in government contracting, technology companies, and professional services. Based in Rockville with strong DC-area presence, Aronson serves many mid-market federal contractors who need DCAA-compliant accounting systems and FAR-compliant financial management. A trusted local partner for businesses at the intersection of the private sector and federal government.
Raffa PC (Washington DC)
Raffa PC is a Washington DC-based accounting firm with deep expertise in the nonprofit and association sector. Given DC’s enormous concentration of nonprofits, trade associations, and advocacy organizations, Raffa serves hundreds of mission-driven organizations in the District. For nonprofit business owners and association executives, Raffa brings specialized knowledge of 990 filings, grant management, and mission-driven financial strategy.
GRF CPAs and Advisors
GRF CPAs and Advisors is a Bethesda-based firm serving the broader DC metropolitan area with a focus on international organizations, nonprofits, government contractors, and private companies. GRF is particularly well-regarded for international tax work, which is relevant for DC-based organizations with overseas operations or global staff. They provide audit, tax, and advisory services with strong technical depth.
DC Tax Planning Tips for Business Owners
Work with a DC-experienced CPA from the start to establish proper accounting systems and understand your franchise tax obligations. Consider entity structure carefully, as DC’s unincorporated business franchise tax applies to LLCs, making the choice between C-corp, S-corp, and LLC treatment have real tax implications in the District. If you have employees in Virginia or Maryland as well as DC, multi-state payroll and income apportionment require careful management.
Build a Strong Financial Foundation
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Also see: Small Business Funding in Washington DC | Best Banks and Credit Unions in Washington DC
