Ann Arbor CPA Firm for S-Corps & Small Businesses

Looking for a CPA in Ann Arbor? SDO CPA provides virtual tax preparation, bookkeeping, payroll, and fractional CFO services to Ann Arbor businesses specializing in S-Corps and partnerships. We provide upfront estimates — if scope changes, we discuss it first. Schedule a free consultation.
Serena Do, CPA — Managing Partner of SDO CPA

Serena Do, CPA

Managing Partner | Duncanville, TX (Serving Ann Arbor Virtually)

18+ Years Experience | AICPA Member

Licensed CPA — Texas State Board of Public Accountancy

With 18+ years of experience helping business owners across the country, I bring specialized expertise to Ann Arbor’s Technology, Life Sciences, Higher Education economy. Whether you’re managing university spin-off IP licensing and R&D credit complexity or capitalizing on University of Michigan’s $1.7B research enterprise creating a pipeline of biotech and tech startups, SDO CPA provides the virtual accounting support your business needs.

We offer cloud-based tax preparation, bookkeeping, payroll, and fractional CFO services designed for Ann Arbor business owners who want proactive guidance — not just annual tax filing.

Key Takeaways: Ann Arbor CPA Services

  • Virtual CPA services — Full tax, bookkeeping, and advisory support without geographic limitations
  • Michigan tax expertise — Michigan has a flat 4.25% income tax plus 6% Corporate Income Tax planning and multi-state compliance
  • Industry focus — Specialized experience with Technology, Life Sciences, Higher Education
  • 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 Ann Arbor, MI

Ann Arbor is Michigan’s innovation capital, anchored by the University of Michigan and its $1.7 billion annual research enterprise. The university’s technology transfer office has spawned hundreds of startups in biotech, software, and autonomous vehicles, creating a vibrant ecosystem of venture-backed companies along the South State Street and North Campus corridors. Major employers including Michigan Medicine, Google’s Ann Arbor office, and Toyota Research Institute attract a highly educated workforce, with over 75% of residents holding a bachelor’s degree or higher.

Michigan’s flat 4.25% income tax applies to all pass-through entity income, and Ann Arbor businesses with university IP licensing revenue face additional complexity around royalty income classification and R&D credit documentation. Startups receiving SBIR or STTR grants need specialized grant accounting to maintain compliance while maximizing the tax benefits of their research spending. The city’s proximity to Detroit also creates dual-market opportunities for tech companies serving automotive OEMs.

SDO CPA works with Ann Arbor business owners in technology, life sciences, and professional services to structure entities for venture investment, document R&D credits for software and biotech development, and manage equity compensation planning for stock options and RSUs. Whether you’re a university spin-off on Plymouth Road or a SaaS company in the Kerrytown district, we provide monthly bookkeeping and fractional CFO services scaled to your funding stage.

Michigan Tax Planning Tip

Michigan’s flat 4.25% income tax applies to all pass-through entity income. Detroit businesses face an additional 2.4% city income tax (1.2% for non-resident employees). S-Corp owners in the Detroit metro should evaluate whether locating outside city limits reduces their total tax burden. Michigan’s flow-through entity tax election can also help bypass the federal SALT cap for owners with $200K+ in Michigan-source income.

Ann Arbor is home to 10,000+ small businesses and a population of 123,851. From Technology, Life Sciences, Higher Education to professional services, Ann Arbor business owners need CPAs who understand managing university spin-off IP licensing and R&D credit complexity and can provide year-round tax planning — not just compliance.

CPA Services for Ann Arbor Businesses

Common Challenges for Ann Arbor Business Owners

Challenge

Ann Arbor businesses often face managing university spin-off IP licensing and R&D credit complexity, 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 Ann Arbor’s business environment, helping you handle R&D credit documentation and IP licensing with confidence.

Challenge

Many Ann Arbor 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 Ann Arbor 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.

“SDO CPA helped our Ann Arbor biotech spin-off properly document R&D credits and structure our S-Corp election. They saved us $13,500 in federal taxes.”
— Dr. Priya N., Biotech startup founder in Ann Arbor

How to Get Started With SDO CPA

1

Schedule Your Free Consultation

Book a call to discuss your Ann Arbor business, current financial setup, and goals.

2

Get Your Custom Proposal

Receive a clear proposal with upfront estimates — if scope changes, we discuss it first.

3

Seamless Onboarding

We connect to your QuickBooks or Xero and organize your books within 30 days.

4

Ongoing Partnership

Monthly reports, proactive tax planning, and year-round CPA access.

Why Ann Arbor Business Owners Choose SDO CPA

Michigan Tax Expertise

We understand Michigan has a flat 4.25% income tax plus 6% Corporate Income Tax and help Ann Arbor 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 Ann Arbor 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

How much does a CPA cost for a small business in Ann Arbor?
At SDO CPA, bookkeeping starts at $300-$500 per month for a single entity. Full-service packages including bookkeeping, tax planning, and advisory range from $1,000-$2,000 per month with upfront estimates — if scope changes, we discuss it first. View our pricing.
Can a virtual CPA serve my Ann Arbor business?
Yes. CPAs can prepare tax returns and provide accounting services for clients in any state. SDO CPA serves Ann Arbor businesses through secure cloud-based tools including QuickBooks Online, Gusto, and encrypted document sharing with the same quality as a local firm.
Do you specialize in Technology businesses?
Yes. Ann Arbor’s Technology sector has unique accounting needs including R&D credit documentation, equity compensation planning, SBIR/STTR grant accounting, and startup entity structuring that we address with tailored solutions.
What is the difference between a bookkeeper and a CPA?
A bookkeeper records transactions and maintains financial records. A CPA is a state-licensed professional who can prepare and sign tax returns, provide tax planning advice, represent you before the IRS, and offer strategic financial guidance that bookkeepers cannot.
Do you offer fractional CFO services for Ann Arbor businesses?
Yes. Our fractional CFO services provide cash flow forecasting, budgeting, financial modeling, and strategic planning for Ann Arbor businesses generating $500K+ in revenue that need financial leadership without a full-time hire.
Should my Ann Arbor business be an S-Corp or LLC?
It depends on your net income. Generally, businesses earning over $60,000 in net profit may save on self-employment taxes by electing S-Corp status. Use our S-Corp tax calculator to estimate savings, then schedule a consultation for personalized analysis.
How quickly does SDO CPA respond to questions?
We respond to all client inquiries within one business day. For urgent tax matters, we prioritize same-day responses. You’ll have direct access to your CPA — no call centers or gatekeepers.
What accounting software do you work with?
We work with QuickBooks Online, Xero, Gusto for payroll, and Ramp for expense management. We’ll recommend the best setup for your Ann Arbor business during your free consultation. Learn about our bookkeeping services.

Resources for Ann Arbor Business Owners

Also Serving Washtenaw County

SDO CPA provides virtual CPA services to businesses throughout Washtenaw County and Michigan.

Ready to Work With a CPA Who Understands Ann Arbor Businesses?

Schedule your free consultation today. We’ll analyze your tax situation and provide an upfront estimate with no obligation.

Schedule a Call
Licensing & Service Disclaimer: SDO CPA LLC is a Texas-licensed CPA firm serving clients in Michigan under CPA practice mobility provisions. We do not maintain a physical office in Michigan — all services are delivered remotely via secure video, phone, and digital collaboration tools. SDO CPA does not hold a CPA license in Michigan. Services requiring CPA licensure are performed by Texas-licensed CPAs. We do not provide attest services (audits, reviews, or compilations). Per Texas State Board of Public Accountancy regulations (22 TAC §501.82).