Building Your Financial Future

Serving clients for over 35 years in the Inland Empire, Southern California and throughout the United States. We provide financial statement compilations, reviews, audits and tax compliance services, tax and business planning, and ESOP consultation to manufacturers, distributors, transportation, nonprofits, contractors and related privately-held businesses.

We are proud to serve clients in all stages of the business life cycle, from start-up through succession.

Elevate Your Experience with Our Professional Accounting Services

Accounting Services

We serve emerging to mid-size businesses, family-run companies, not-for-profit organizations, and individuals with advanced tax and financial planning needs, from payroll requirements to compiled financial statements.


Assurance Services

Working closely as business advisors, our team engages clients in discussions and enhances the quality of information received to help create better financial and business decisions.

Tax Solutions

Planning is the key to successfully and legally reduce your tax liability. By going beyond tax compliance and proactively recommending tax saving strategies, we maximize your after-tax income.


Our firm has amassed a wealth of experience in the accounting, tax and regulatory complexities of Employee Stock Ownership Plans, including leveraged plans, share allocation, and the valuation process.

Employee Benefit Plans

When performing full- and limited-scope audits of employee benefit plans, our firm provides clients with the ability to effectively enhance their plan administration and compliance.


Our advisory services are a resource for everything from strategic planning to significant long-term organizational decisions that improve day-to-day efficiencies throughout all stages of the business life cycle.


To help our clients understand how they compare to their competition, we provide benchmarking with anonymous financial data from similarly situated organizations.

Corporate Tax Diagnostic

As accountants, we understand the importance of consultative partnerships and strive to help our clients understand general tax principles and strategies and the subsequent tax implications.

R&D and Tax Credit Review

We design a customized approach for each client to efficiently collect, analyze and document activities, expenses and credits to understand potential tax benefits.

Our Shareholders

Michael J. Kouyoumdjian, CPA

Michael J. Kouyoumdjian, CPA

Managing Shareholder

Cristen D. Stier, CPA, MBA

Cristen D. Stier, CPA, MBA

Shareholder, Accounting & Auditing

Michael Zermeño, CPA

Michael Zermeño, CPA

Shareholder, Accounting & Auditing

Fernando Ayala, CPA

Fernando Ayala, CPA

Shareholder, Tax & Compliance

RP&B CPAs can help with all your accounting needs

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