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📍 Washington DC · Tax Prep Service

Business Tax Preparation
in Washington DC

Tax preparation support in Washington, DC for the small businesses navigating the most distinct tax regime in the DMV — D-30 unincorporated business franchise tax for LLCs and partnerships, FR-500 registration for sales tax and withholding accounts, the annual ballpark fee on businesses above the gross-receipts threshold, multi-tier DC sales tax on prepared food, alcohol, and lodging, plus 501(c)(3) and 501(c)(6) Form 990 coordination for K Street nonprofits and trade associations. We organize the books year-round and coordinate directly with your CPA at filing time. Verified Intuit QuickBooks ProAdvisor.

★★★★★5.0on Google
Business and personal tax returns filed for Washington DC small businesses
S-Corp, LLC, sole prop, partnership — all entity types
Year-round Washington DC tax planning — not just April filing
IRS notice response included — we handle the letters
Washington DC Tax Tracker
Example
Business return (1120-S)Mar 17st-ok
Personal 1040Apr 15st-ok
Q2 Estimated paymentJun 15st-due
Year-end tax planningDecst-ok
📍 Washington DC — local noteDC businesses face Franchise Tax, Unincorporated Business Tax, and DC-specific deadlines separate from federal. We handle every form, every year.
Your Washington DC tax prep plan

Everything included — no hidden
add-ons or surprise fees

Every business tax accountant Washington DC client in Washington DC gets the complete service.

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All entity types
S-Corp (1120-S), LLC, Partnership, Sole Proprietor, and personal 1040. Every return filed correctly and on time.
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Year-round planning
Tax planning that starts in January — not March. We flag deductions and make strategic moves while there's still time.
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State & local expertise
Federal plus every state and local filing your business needs. No missed deadlines, no overlooked forms.
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Maximize deductions
We review every deduction category relevant to your industry and entity type — nothing left on the table.
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IRS correspondence
If the IRS or state sends a notice, we handle it. You don't have to figure out what to do alone.
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Estimated payments
We calculate your quarterly estimated tax payments and remind you before each deadline — no underpayment penalties.
DC-specific tax prep

What Washington DC tax prep
actually requires.

DC tax prep is its own animal. The District operates a separate tax authority (Office of Tax and Revenue), separate franchise tax regime (D-30 for unincorporated, D-20 for corporations), separate registration via FR-500, and the ballpark fee that surprises most clients moving from Virginia or Maryland. Below is what we handle as part of standard year-end tax prep coordination with your CPA.

D-30 Unincorporated Franchise Tax
DC's D-30 applies to most LLCs, partnerships, and sole proprietorships operating in DC with gross income above the filing threshold. It's a franchise tax — entity pays at the DC rate even though income passes through for federal purposes. Most DC freelancers and consultants forming an LLC don't realize this until year-end. We organize the books to support the D-30 your CPA prepares, and we make sure DC apportionment is clean if you have non-DC engagements.
D-20 Corporate Franchise Tax
DC C-corps file Form D-20. Unlike federal Form 1120, D-20 has DC-specific apportionment using a single sales factor formula and a minimum tax floor. We coordinate the federal-to-DC adjustments with your CPA — addback of state taxes deducted federally, depreciation conformity, and net operating loss limitations specific to DC.
FR-500 registration + ballpark fee
FR-500 is DC's master business registration via MyTax.DC.gov — creates accounts for sales tax, withholding, franchise tax, and the annual ballpark fee. The ballpark fee is tiered based on gross receipts and surprises most clients. We track gross receipts in QuickBooks against the tier thresholds and prep the FR-1500 ballpark fee return alongside the franchise return.
DC sales tax (multi-tier rates)
DC sales tax has multiple rate tiers — prepared food at one rate, alcohol at another, lodging at another, and certain digital services. Restaurants and bars in Logan Circle, Penn Quarter, U Street, and H Street NE need POS-to-QuickBooks integration that separates the rates correctly. We do this configuration and reconcile monthly DC sales-tax filings.
501(c) nonprofit Form 990 coordination
DC concentrates 501(c)(3) charities, 501(c)(6) trade associations, and 501(c)(4) advocacy organizations. Form 990 requires functional expense allocation, restricted vs. unrestricted net asset tracking, in-kind contribution accounting, and conference / membership revenue recognition. We organize the books per FASB ASC 958 nonprofit reporting and coordinate with your CPA on the 990, the DC nonprofit franchise tax exemption, and unrelated business income (UBI) where applicable.
Multi-state apportionment
K Street consultancies, government-affairs firms, and federal-agency support shops often work across DC, Maryland, and Virginia. Multi-state apportionment requires sales factor by state, payroll factor, and (for some states) property factor. We tag transactions by client jurisdiction throughout the year so apportionment rolls cleanly into D-30, MD Form 510, and VA Form 502 filings at year-end.
Ongoing books: DC bookkeeping. DC payroll (FR-900Q, DC unemployment): DC payroll. Across the river in Virginia: Arlington VA tax prep (BPOL + PTET). Across the river in Maryland: Bethesda MD tax prep (SDAT + MD PTET).
Sound familiar?

Why DC business owners
stop filing their own taxes

Dreading Tax Season
Got An Irs Notice
Years Behind On Filing
Paying Too Much In Taxes
Switching From Turbotax
Need A Real Tax Accountant
Missed Quarterly Estimates
Surprised By A Big Tax Bill
Don't Know What You Can Deduct
First Year In Business Taxes

If any of these hit home, we should talk. Free 15-minute consultation, no pressure.

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Industries we know cold

Tax prep for the businesses
that actually run Washington, DC.

DC's small business economy concentrates in three patterns. We focus there.

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501(c) nonprofits & trade associations
501(c)(3), 501(c)(6), 501(c)(4) along K Street, Massachusetts Avenue, Capitol Hill. Form 990 coordination, functional expense allocation, restricted vs. unrestricted net assets, in-kind contributions, conference and membership revenue recognition, DC nonprofit franchise tax exemption, unrelated business income (UBI). FASB ASC 958 reporting throughout the year.
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Consultancies & government-affairs firms
Boutique strategy consultancies, government-affairs and lobbying shops, communications firms, federal civilian agency support consultancies. D-30 apportionment for firms with non-DC engagements, multi-state tax exposure, retainer revenue recognition, expense reimbursements that pass through to clients, and Schedule K-1 owner distributions.
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Hospitality (restaurants, hotels, bars)
Logan Circle, Penn Quarter, U Street, H Street NE, Adams Morgan, Dupont, Georgetown. Multi-tier DC sales tax (prepared food, alcohol, lodging), FICA tip credit (Form 8846) flowing to the franchise return, Form 8027 for large food/beverage establishments, Section 263A inventory capitalization, qualified business income deduction (Section 199A) modeling.
Local expertise

Why Washington DC businesses choose
Capital Accounting Group

We're not a national chain. We understand Washington DC's local tax rules, industry mix, and what government contractors owners actually need from a business tax accountant Washington DC.

What we know about Washington DC tax prep
  • Washington DC has over 80,000 registered businesses
  • DC's Franchise Tax applies to all corporations and LLCs
  • DC Unincorporated Business Tax (UBT) catches many sole proprietors off guard
  • DC requires separate DCRA business license renewals annually
Book a free Washington DC consultation →
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Weekly — not monthly
Most Washington DC bookkeeping services reconcile once a month. We do it every week — your numbers are never more than 7 days stale.
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Risk-free guarantee
We get your books in order within 30 days — or your first month is free. We stand behind the work.
Fast onboarding
Most Washington DC tax prep clients are up and running within 1–2 weeks. No long contracts, no setup headaches.
How it works

From first call to clean books —
in less than two weeks.

1
Free consultation
15 min — we learn your Washington DC business, current setup, and what tax prep you need most.
2
Secure access
You grant read-only account access. No sensitive data ever emailed back and forth.
3
We get to work
Your first tax prep cycle starts within 1–2 weeks. Clean, fast, no drama.
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Ongoing support
Reports, proactive updates, and real humans who flag problems before they become penalties.
A representative tax-prep engagement

What a typical DC
tax-prep engagement looks like.

A small DC-based 501(c)(6) trade association (12-person staff, $4M annual revenue split between dues, conference, and sponsor revenue) came to us five months into the fiscal year. Their auditor was scheduled in two months. The books had conference revenue from the prior year sitting in deferred revenue without being recognized; sponsor contributions weren't separated from membership dues; restricted grant funds weren't tracked separately from operating cash; functional expense allocation between program, management, and fundraising hadn't been done in two years; and the DC franchise tax exemption registration was about to lapse.

Over five weeks, we rebuilt the chart of accounts to support GAAP nonprofit reporting (FASB ASC 958), separated restricted from unrestricted net assets, recognized conference revenue per events held, allocated functional expenses against actual time-and-square-footage data, renewed the DC franchise tax exemption with the Office of Tax and Revenue, and produced an audit-ready statement of activities, statement of financial position, and statement of functional expenses. The auditor proceeded on schedule; the Form 990 filed cleanly two months later. We now close their books monthly and run a Form 990 cross-check the prior week each year.

That's a representative composite — not a single real client — but it's a pattern we see two or three times a quarter in DC's nonprofit and association community.

Frequently asked questions

Washington, DC tax prep
FAQ.

How much does small business tax prep cost in Washington, DC?+
For a DC small business, year-round tax-prep coordination typically runs $350–$1,500 per month. Our published plans start at $350/month for sole proprietors, $650/month for established businesses needing weekly close, and $1,500/month for the CFO Partner tier with cash-flow forecasting. CPA tax-return preparation fees are separate ($1,200–$3,500 for a typical D-30 return depending on complexity, more for nonprofits with Form 990).
What is the DC D-30 unincorporated franchise tax and do I have to pay it?+
D-30 applies to most LLCs, partnerships, and sole proprietorships operating in DC with gross income above the filing threshold (currently $12,000). It's a franchise tax — paid at the entity level at the DC rate even though income passes through to owners for federal purposes. Most DC consultants and freelancers forming an LLC don't realize this until year-end. We make sure your bookkeeping supports a clean D-30 filing by your CPA.
What is the FR-500 and do I need to file it?+
FR-500 is DC's master business registration through the Office of Tax and Revenue (MyTax.DC.gov). Every business operating in DC must register before doing business — the registration creates accounts for sales tax, withholding, franchise tax, and the ballpark fee. Skipping FR-500 means missing tax accounts and triggering notices. We handle FR-500 setup during onboarding.
How does the DC ballpark fee work?+
DC charges an annual ballpark fee on businesses above gross-receipts thresholds, originally enacted to fund Nationals stadium financing. The fee is tiered (minimum $0 below threshold, scaling up by gross-receipts band). We track gross receipts in QuickBooks against the tier thresholds so you know if you're crossing a level before the bill arrives, and we prep the FR-1500 alongside your franchise return.
Can you handle Form 990 coordination for a 501(c)(3) or 501(c)(6) nonprofit?+
Yes. Nonprofits and trade associations are our primary DC focus. We handle functional expense allocation, restricted vs. unrestricted net asset tracking, in-kind contribution accounting, conference and membership revenue recognition per FASB ASC 958, and we coordinate with your CPA on the Form 990, DC nonprofit franchise tax exemption, and unrelated business income (UBI) reporting where applicable.
How does DC sales tax work for a Logan Circle or Penn Quarter restaurant?+
DC sales tax has multiple rate tiers — prepared food at one rate, alcohol at another, lodging at another, certain digital services at another. Restaurants and bars need POS-to-QuickBooks integration that separates the rates correctly. We configure Toast, Square, Clover, or Opera Cloud (for hotels) so monthly DC sales-tax filings reconcile cleanly to merchant deposits.
Can you handle multi-state tax filing if my DC consulting firm works in Virginia and Maryland?+
Yes. Many K Street consultancies have engagements across the DMV. We tag transactions by client jurisdiction throughout the year so multi-state apportionment (sales factor, payroll factor, and where applicable property factor) rolls cleanly into D-30 (DC), Form 510 (Maryland), and Form 502 (Virginia) returns at filing time.
More service areas

Tax Prep across the DMV

We serve small businesses throughout Washington DC, Maryland, and Virginia.

More services in Washington DC

All services designed for Washington DC small businesses.

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