Best Accountants
in Ontario

Why These Accountants?

Our goal is to connect people with the best local experts. We scored accountants on more than 25 variables across five categories, and analysed the results to give you a hand-picked list of the best accountants in Ontario, CA.

ReviewedCuratedTop Picks43298

Our Selection Criteria:

  • 1. Reputation

    A history of delighted customers and outstanding service.

  • 2. Credibility

    Building customer confidence with licensing, accreditations, and awards.

  • 3. Experience

    Masters of their craft, based on years of practical experience and education.

  • 4. Availability

    Consistently approachable and responsive, so customers never feel ignored.

  • 5. Professionalism

    Providing service with honesty, reliability, and respect.

Fan & Li LLP, CPA

Fan & Li LLP, CPA is an accounting firm with more than a decade of experience serving clients in Diamond Bar and the surrounding area, which includes all of eastern Los Angeles County. The company has a full-service accounting department for businesses generating between $1 million and $25 million in sales annually. The suite of services includes financial analysis, a full-charge bookkeeper, CPA controller, and chief financial officer. It also provides bookkeeping services for companies that employ as few as five employees. Other services include IRS resolution and audit support, nonprofit taxation, correspondence with federal authorities, and reconciliation of vendor statements.

Diamond Bar, CA(626) 231-9818


Heidi Kwok CPA, MBT

Heidi Kwok CPA, MBT is a certified public accounting serving the Walnut area. She possesses more than a quarter-century of experience in the accounting field with a master’s degree in business taxation from the University of Southern California, one of the nation’s top schools for the profession. From 2008-2010, she serves as president of the Sino-American CPA Association, and she worked at one of the five largest accounting firms in the world before setting out on her own. Primary services include tax return preparation as well as tax counseling and planning. She also provides bookkeeping and financial statements, payroll/sales tax support, and audit representation before state and federal authorities.

Walnut, CA(909) 869-7887


Howard Li, CPA

Howard Li, CPA is a certified public accountant serving individuals and businesses in and around the City of Industry. Li earned his accounting degree from California State University-Long Beach before attaining his teaching credential through the University of California-Los Angeles (UCLA). He possesses more than two decades of professional training and experience, and his areas of specialization include but are not limited to identification of audit red flags, implementation and preparation of QuickBooks, bank reconciliations, and the provision of both full and partial payroll services. Li also has the capability of representing clients before the IRS and handling preemptive audits to avoid unwanted attention from federal and state tax authorities.

City Of Industry, CA(888) 617-2088


Raymond Regalado, CPA

Raymond Regalado, CPA launched his Ontario-based accounting firm in 1984, and he has more than 30 years of experience serving business and individual taxpayers in the Los Angeles area. Regalado provides support for a variety of areas, including financial planning, business valuations, entity structuring, and sales/property tax/license renewals. Clients have utilized his services for estate and trust planning as well as QuickBooks implementation and training. Since 1992, Regalado has partnered with fellow accountant Andraea Regalado-Cardenas, who also serves as office manager. She earned her degree from California State University-San Bernardino in 2000. The pair provides accounting services to both English- and Spanish-speaking clientele.

Ontario, CA(909) 988-6551


Rogers, Clem & Company

Rogers, Clem & Company is an accountancy corporation located in and serving the businesses/individuals of Covina and Los Angeles County. The staff consists of several highly-qualified accountants and bookkeepers with decades of combined experience providing financial reporting assistance to industries like auto sales. It has operated out of the area for more than a quarter-century. Primary functions include tax planning and preparation, IRS representation, estate/trust tax planning, management advisory services, and assistance on mergers, acquisitions, and sales. The firm is a member of the Private Companies Practice Section (PCPS) of the American Institute of Certified Public Accountants, submitting itself to quality control reviews from peers on accounting/auditing practices every three years.

Covina, CA(626) 858-5100


Teders Business and Tax Service

Teders Business and Tax Service is a firm of accounting professionals started by Mary Ann Teders. She established the business in 1987, and it has served the Upland and San Bernardino County regions for more than three decades. The team has the combined experience of more than 100 years, and they hold active memberships with the California Society of Tax Consultants, National Association of Enrolled Agents, California Society of Enrolled Agents, and Accreditation Council for Accountancy and Taxation. Primary functions include but are not limited to tax preparation/planning, bookkeeping, audit representation, and payroll tax management services. The company also is a preferred choice of service professionals such as educators, firefighters, and law enforcement personnel.

Ontario, CA(909) 983-3716


Wisdom CPA Group

Wisdom CPA Group is a full-service accounting firm located in the City of Industry that serves clients throughout Los Angeles County. Co-founder/CEO Jimmy Wong, CPA, EA, MBT earned his master’s degree in business taxation from the University of Southern California, and he holds active memberships in the American Institute of Certified Public Accountants and Chartered Global Management Accountant organization. The business launched in 2013, and in addition to tax planning and preparation services, it provides personal financial and estate planning for individuals as well as payroll solutions, CFO service, cash flow management, strategic business/succession planning, and assistance with a new business formation.

City Of Industry, CA(626) 820-9245


ZD Consulting Group

ZD Consulting Group is a premier accounting firm in the City of Industry. It serves businesses and individuals both in the city and surrounding communities of the San Gabriel Valley region in Los Angeles County. It assists clients in the selection, setup, and implementation of accounting software as well as full-charge bookkeeping services. Clients buying or selling businesses have utilized ZD for valuations. Many of its clients rely on it for cash flow and budgeting analysis as well. Other provisions include tax services such as audit representation or help with liens, levies, and wage garnishments. ZD Consulting also offers a range of payroll services from partial to full.

City Of Industry, CA(626) 964-8862


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