A CPA firm is more than just tax preparation—it's a partner that handles your most critical financial decisions, from compliance to strategy. Most business owners and individuals don't fully understand what services are actually included, which often leads to overpaying or getting incomplete advice. This guide breaks down exactly what CPA firms do and how to choose the right one for your situation.
Core Tax Services
The foundation of any CPA firm is tax preparation and filing. This includes federal and state income tax returns for individuals, businesses, and trusts, plus payroll tax compliance and estimated quarterly payments. A CPA will identify deductions you might miss on your own and ensure everything's filed correctly to minimize audit risk.
Most CPA firms charge $500–$5,000+ annually for individual tax returns, depending on complexity. Business returns run $1,500–$15,000+, with S-corps and partnerships typically higher. Some firms charge flat fees; others bill hourly at $150–$400/hour.
Bookkeeping and Accounting Services
Many CPA firms now offer ongoing bookkeeping—tracking income, expenses, and reconciling accounts throughout the year. This is critical because good records make tax time faster and cheaper. You'll get accurate financial statements (profit & loss, balance sheet) that actually reflect your business health.
If your firm handles bookkeeping, expect to pay $300–$1,500+ monthly, depending on transaction volume and complexity. Monthly reviews catch errors early and keep you tax-ready year-round, rather than scrambling in March with a shoebox of receipts.
Business Consulting and Planning
A solid CPA firm doesn't just react to your finances—they help you plan ahead. This includes:
- Business structure advice (LLC vs. S-corp vs. sole proprietorship) and when to change
- Tax planning strategies to reduce your liability before the year ends
- Cash flow projections to anticipate shortfalls or surpluses
- Retirement plan setup (SEP-IRA, Solo 401k, etc.) with contribution limits
- Entity formation and compliance (annual filings, minutes, resolutions)
Strategic consulting often costs $1,000–$5,000+ for a comprehensive plan, then ongoing hourly rates apply for implementation. The tax savings alone typically pay for this within the first year.
Audit and Assurance
Larger businesses and nonprofits need audits or reviews—independent verification that financial statements are accurate. CPAs perform audits (most rigorous), reviews (moderate scope), or compilations (lowest assurance level). Audits typically cost $5,000–$25,000+ depending on company size and complexity; a review might run $2,000–$8,000.
Most small businesses don't require audits, but lenders, donors, and partners often request them. A CPA will tell you upfront whether you need one.
Payroll and HR Compliance
A CPA firm can set up and manage your payroll system, calculate withholdings, file quarterly and annual payroll returns (941, 940, state filings), and ensure W-2s are issued correctly. Some firms also advise on employee classification (contractor vs. employee), which has major tax implications.
Payroll services typically cost $30–$100 per employee, per month, depending on frequency and complexity.
What to Look for When Comparing CPA Firms
Industry expertise matters. A CPA experienced in real estate has different skills than one handling medical practices or nonprofits. Ask about their client base and relevant certifications.
Technology integration is essential. Modern firms use cloud accounting software (QuickBooks, Xero, FreshBooks) and offer secure portals for document sharing. Avoid firms that still work primarily on paper or demand you hand-deliver documents.
Responsiveness and communication. You should hear back within 48 hours. Many firms offer fixed-fee packages for common services, making costs predictable.
Consider the relationship. Will you work with a partner or junior accountant? Larger firms may assign junior staff; smaller practices often keep the same person on your account long-term.
Mercoly helps you compare and find trusted CPA firms side-by-side so you can evaluate pricing, services, and reviews without endless phone calls.
Frequently Asked Questions
Q: Do I need a CPA, or is an EA (Enrolled Agent) enough? Both can file taxes, but CPAs can provide broader advisory services, audits, and legal defense in certain situations. For complex businesses, a CPA is usually worth the extra cost.
Q: How much should I budget for a CPA firm annually? Budget $2,000–$5,000+ for a typical small business, but costs vary widely based on structure, complexity, and whether they handle bookkeeping too. Get three quotes before deciding.
Q: When should I hire a CPA instead of handling taxes myself? If your business income exceeds $50,000, you have multiple entities, employees, or complicated deductions, a CPA almost always saves more in taxes than they charge in fees.
Compare CPA firms on Mercoly to find the right fit for your financial needs and budget.