Certified Public Accountants
Your numbers, balanced to the last cent.
QuantumCPA is a full-service accounting firm helping business owners and individuals with bookkeeping, tax planning, payroll and CFO-level advice — so you can focus on running your business.
What we do
Services built around your business
From clean monthly books to CFO-level strategy — pick what you need today, add more as you grow.
Tax Planning & Advisory
Professional Tax Planning Services that help individuals and businesses minimize taxes, maximize savings, and develop long-term financial strategies.
Learn more →Tax Return Preparation
Professional tax return preparation services for individuals and businesses. Accurate filing, maximum deductions, and year-round tax support from experienced Certified Public Accountants.
Learn more →Why QuantumCPA
Accounting that pays for itself
Most firms react. We plan. Every engagement includes proactive check-ins, plain-English explanations and a team that responds within one business day.
- Proactive, not reactive. We reach out before deadlines, not after them.
- Fixed monthly pricing. No surprise invoices, no billing by the minute.
- One team for everything. Books, payroll, taxes and advice under one roof.
- Modern tools. QuickBooks, Xero, Gusto and a secure client portal.
From the blog
Insights & tax tips
Income Tax Preparation Services
Are you looking for comprehensive income tax preparation services? Look no further! Our St. Louis-based firm serves businesses and individuals nationwide, providing personal tax return preparation and a wide array of other tax and accounting services, personalized just for you.
Read article →Columbia-Based CPA Firm
From bookkeeping and reporting to taxes and accounting, your finances are in good hands with Lewis.cpa. Our full-service certified public accounting firm takes care of everything, so you won’t have to.
Read article →