Washington CPA Firm for S-Corps & Small Businesses
With 18+ years of experience helping business owners across the country, I bring specialized expertise to Washington’s Technology, Aerospace, Healthcare economy. Whether you’re managing B&O tax classification and multi-state sales tax obligations or capitalizing on Washington’s zero state income tax advantage for business owners and employees, SDO CPA provides the virtual accounting support your business needs.
We offer cloud-based tax preparation, bookkeeping, payroll, and fractional CFO services designed for Washington business owners who want proactive guidance — not just annual tax filing.
Key Takeaways: Washington CPA Services
- Virtual CPA services — Full tax, bookkeeping, and advisory support without geographic limitations
- Washington tax expertise — Washington has no state income tax, but B&O tax on gross receipts applies to most businesses planning and multi-state compliance
- Industry focus — Specialized experience with Technology, Aerospace, Healthcare
- Transparent pricing — Upfront estimates starting at $300/month; if scope changes, we discuss it first
- Responsive support — Direct CPA access, same-day responses
Accounting & Tax Services in Washington
Washington’s tech sector accounts for 22% of the state economy, the highest percentage in the nation. The Greater Seattle-Bellevue metro generates over $560 billion in gross regional product, powered by Amazon, Microsoft, Boeing, and hundreds of startups along the I-405 corridor and South Lake Union. With no personal or corporate income tax, Washington attracts business owners and high-earning tech employees from across the country.
Washington’s Business & Occupation (B&O) tax on gross receipts replaces income tax as the primary state business obligation. Different classifications carry different rates, and many businesses overpay because they default to the wrong category. S-Corp owners selling into states that do impose income tax face multi-state nexus considerations, while the state’s sales tax on goods and many services adds another layer of compliance complexity.
SDO CPA serves Washington businesses statewide, from Seattle tech startups to Spokane healthcare practices and Vancouver cross-border operations. We provide virtual tax preparation, bookkeeping, payroll, and fractional CFO services tailored to Washington’s unique tax structure. Whether you’re an S-Corp owner in Bellevue’s tech corridor or a partnership running logistics through the Port of Tacoma, we handle B&O tax optimization, federal tax planning, and multi-state compliance so you can focus on growing your business.
Washington Tax Planning Tip
Washington has no state income tax, but the B&O (Business & Occupation) tax applies to gross receipts at rates varying by classification: 1.5% for service businesses, 0.471% for manufacturing, and 0.484% for retailing. Many Washington businesses overpay because they file under the wrong classification or miss available credits and deductions. Proper classification review and tax credit identification can reduce your B&O liability significantly.
CPA Services for Washington Businesses
Business Tax Preparation
Federal and Washington business tax returns for LLCs, S-Corps, partnerships, and sole proprietors.
Bookkeeping & Accounting
Monthly bookkeeping, bank reconciliation, and financial statements using QuickBooks or Xero.
Payroll Services
Full-service payroll processing, tax deposits, and quarterly filings through Gusto integration.
Tax Planning & Strategy
Proactive tax planning to minimize liability through entity selection, retirement contributions, and timing strategies.
Fractional CFO
Cash flow forecasting, budgeting, and financial strategy for growing Washington businesses.
S-Corp Tax Services
Reasonable compensation analysis, QBI optimization, and S-Corp election guidance for Washington business owners.
Common Challenges for Washington Business Owners
Challenge
Washington businesses often face B&O tax classification and multi-state sales tax obligations, making tax planning and cash flow management more complex than standard approaches allow.
Our Approach
We provide proactive tax planning and fractional CFO services tailored to Washington’s business environment, helping you handle B&O tax classification and multi-state sales tax obligations with confidence.
Challenge
Many Washington business owners struggle to get timely responses from their CPA, especially during busy seasons when questions are most urgent.
Our Approach
SDO CPA provides direct access to your CPA team with same-day response times. No call centers, no waiting weeks for answers.
Challenge
Tax preparation alone doesn’t help Washington business owners understand their financial position or make informed decisions throughout the year.
Our Approach
We deliver monthly financial reports with actionable insights, helping you understand cash flow, profitability, and tax liability before year-end.
“As a Seattle SaaS startup, we needed a CPA who understood our metrics, equity structure, and investor expectations. SDO CPA helped us prepare clean financials for our Series A and now manages our ongoing accounting seamlessly.”— Rachel T., SaaS startup founder in Washington
How to Get Started With SDO CPA
Schedule Your Free Consultation
Book a call to discuss your Washington business, current financial setup, and goals.
Get Your Custom Proposal
Receive a clear proposal with upfront estimates — if scope changes, we discuss it first.
Seamless Onboarding
We connect to your QuickBooks or Xero and organize your books within 30 days.
Ongoing Partnership
Monthly reports, proactive tax planning, and year-round CPA access.
Why Washington Business Owners Choose SDO CPA
Washington Tax Expertise
We understand Washington has no state income tax, but B&O tax on gross receipts applies to most businesses and help Washington businesses maximize tax advantages while managing federal obligations and multi-state complexity.
Transparent Pricing
Clear monthly estimates for standard services. We scope your needs upfront and communicate before any additional work. See our pricing.
Cloud-Based & Virtual
Access your financials anywhere. We work with QuickBooks Online, Xero, Gusto, and Ramp to keep your Washington business running smoothly.
S-Corp & Partnership Specialists
Our clients are pass-through entity owners. We handle reasonable compensation analysis, K-1 preparation, QBI optimization, and entity selection.
Responsive Communication
Get answers when you need them. Our team responds within one business day, and you’ll have direct access to your CPA.
Frequently Asked Questions
Resources for Washington Business Owners
Serving Washington Businesses Statewide
SDO CPA provides virtual CPA services to businesses throughout Washington.
Ready to Work With a CPA Who Understands Washington Businesses?
Schedule your free consultation today. We’ll analyze your tax situation and provide an upfront estimate with no obligation.
Schedule a Call