Tax & Accounting Services for Individuals, Businesses, Estates & Nonprofits Across Maryland

35+ Industries. 20+ Communities. One CPA Firm You Can Actually Reach.

Whether you need personal tax prep, business accounting, non-profit tax returns, or specialized trust and estate tax planning, we provide expert guidance every step tailored to your industry, wherever you are in Maryland.

Let's Talk301-662-6992

Expert CPA Tax & Accounting Services Frederick MD | Protect Your Business & Bottom Line

Full-Service Tax & Accounting Solutions

Stop overpaying in taxes and letting accounting errors cost you money. Mercer Flanagan is a CPA firm that delivers comprehensive tax preparation, bookkeeping, and CFO-level financial oversight that protects your business and your bottom line.

Individual Tax Prep
We handle your entire tax return from start to finish, finding every deduction while you relax knowing it's done right.
  • Personal CPA interview every year
  • CPA review for maximum accuracy
  • Year-round question support
  • Specialize in complex investment returns
Small Business
Tax Returns
Take business taxes completely off your plate—we handle everything so you can focus on running your business.
  • Complete business tax management
  • Quarterly planning and estimates
  • Multi-entity expertise
  • Responsive year-round support
Estate & Trust
Tax Services
Navigate complex estate and trust taxes with specialists who handle what other firms won't touch.
  • Estate and trust specialization
  • Complex situation expertise
  • Probate and inheritance guidance
  • What other firms avoid, we handle
QuickBooks Support & Training
Get your books organized and learn to use QuickBooks effectively with hands-on training from experienced CPAs.
  • QuickBooks setup and training
  • Troubleshooting support
  • Business owner focus
  • Ongoing consultation available
Financial Statement Compilations by a Licensed CPA
Only a licensed CPA can prepare compiled financial statements. We provide professional CPA compiled financials that banks, lenders, and investors actually trust.
  • CPA compiled profit & loss statements
  • Balance sheet preparation
  • Required for bank loans and financing
  • Prepared by a licensed Frederick MD CPA
Non-Profit Tax Returns
We prepare Form 990 filings and handle tax compliance for non-profit organizations of all sizes keeping them in good standing without the headache.
  • Form 990 preparation
  • Non-Profit compliance
  • Tax-exempt status support
  • Professional CPA Tax Services
Tax Planning
Individual or Business Tax Planning
We work with individuals and businesses in Maryland to create proactive tax strategies that reduce your tax liability, maximize deductions, and keep more money in your pocket year-round.
  • Tax planning strategies to reduce what you owe
  • Quarterly estimated tax planning and filing
  • S-Corp election and business entity optimization
  • Year-round CPA tax planning
Fractional CFO & Controller Services
Get CFO-level financial oversight without the full-time cost. We handle the numbers so you can focus on growing your business.
  • Monthly financial reporting
  • Cash flow management
  • Budget preparation and analysis
  • CPA-backed financial oversight

Looking for Guidance Specific to Your Industry?

Every business has its own tax rules, deductions, and blind spots. See how we work with businesses just like yours.

Contractors Restaurants Landlords Nonprofits Consultants Attorneys Farms See All 35+ →
Explore Who We Serve

📍 Serving Frederick, Gaithersburg, Hagerstown & 17 more communities across central Maryland — see all the areas we serve →

Learn from the pros

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