Top 5 Small Business Accounting Firms in Kansas City
For small businesses, a good accounting partner is less about “doing taxes” and more about making sure your books are clean, your payroll and compliance are handled, and your financial picture stays clear all year.
This list highlights five KC-metro firms that explicitly serve small businesses and offer services like bookkeeping, tax planning, payroll support, and advisory. If you are looking for a long-term relationship (not a one-time tax appointment), these are strong places to start.
Reller & Company, CPA, PC
Website: rellercpa.com
Reller & Company is a full-service firm located in Kansas City’s Brookside neighborhood. If you prefer a KC-based CPA office with a traditional “know your clients” approach, this is a solid option.
They are a practical fit for business owners who want year-round support, not just seasonal filing, and who value clear guidance on day-to-day accounting decisions.
Ong & Company
Website: ongandcompany.com
Ong & Company is an Overland Park-based CPA firm that provides small-business-oriented solutions spanning tax, accounting, payroll, and advisory services. If you want a firm that can help beyond compliance (formation, performance improvement, planning), they are worth a look.
This is a strong pick for owners who want proactive conversations throughout the year and a team that can support multiple moving parts as the business grows.
Cornerstone CPA, LLC
Website: cscpakc.com
Cornerstone is a public accounting firm in Overland Park that combines tax strategy, bookkeeping, accounting/controller services, and business consulting. If you are trying to tighten up reporting, improve visibility, and make better decisions with your numbers, their service mix is a good match.
They are a strong option for owners who want a more advisory-style relationship instead of just basic bookkeeping and filing.
McAuley & Crandall, PA
Website: mccpas.com
McAuley & Crandall is an Overland Park CPA firm that works with small businesses, nonprofits, and individuals, offering accounting, bookkeeping, and tax services. If your main goal is to reduce the stress of staying organized (and avoid surprises at tax time), they position themselves around making the process easier and more manageable.
This can be a great fit for small business owners who want dependable help maintaining accurate records and handling filing requirements throughout the year.
Ainsworth Accounting & Tax Services
Website: ainsworthaccounting.com
Ainsworth is a Lenexa-based CPA firm that explicitly focuses on making accounting simple for small businesses, with services that include bookkeeping, tax planning, and new business advisory. If you want a small-business-first mindset and flexible packaging of services, they are a strong KC-metro option.
This is a good match for owners who want an outsourced accounting partner that can scale up or down as needs change over the year.
Quick tip: Before choosing a firm, ask what your monthly cadence will look like (bookkeeping frequency, payroll handling, and how often you review financial statements). Also ask whether they will help you clean up prior-year books and set up a repeatable process going forward.
This article was reviewed and updated for accuracy on March 3, 2026.
