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ABOUT ABUAN CPA CORP.
Accounting, Tax Services, and Government Contractor Advisory Services
Abuan CPA Corp. is a California CPA firm providing accounting, tax, and advisory services to:
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Government contractors
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Commercial companies entering defense contracting
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Small businesses
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Individuals
The firm combines CPA services with nearly 20 years of experience evaluating government contractor accounting systems and cost accounting practices through service with the Defense Contract Audit Agency (DCAA).
MEET THE FOUNDER
Ramiro M. Abuan, CPA
Ramiro M. Abuan is a Certified Public Accountant licensed in California and the founder of Abuan CPA Corp.
He retired in September 2025 after more than 20 years of combined federal service, including nearly 20 years with the Defense Contract Audit Agency (DCAA), where he served as a Senior Auditor and later as an Investigative Support Auditor with DCAA's Office of Investigative Support (OIS).
Today, he applies that experience through a California CPA firm focused on accounting, tax, and advisory services for government contractors, commercial companies, small businesses, and individuals.
WHY THE FIRM WAS FOUNDED
Experience Applied to Today's Business Challenges
After retiring from federal service in September 2025, Ramiro Abuan founded Abuan CPA Corp. to provide accounting, tax, and advisory services informed by nearly 20 years of experience evaluating government contractor accounting systems, cost accounting practices, and financial records.
The goal is simple:
To provide practical, professional, and personalized guidance that helps clients maintain organized financial records, make informed decisions, and address accounting and tax challenges with confidence.
NEARLY 20 YEARS WITH DCAA
Government Contractor Audit Experience
Contractor Accounting Systems
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Pre-award accounting system surveys
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Post-award accounting system audits
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Labor floorchecks
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Labor distribution evaluations
Cost Accounting & Indirect Rates
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Incurred Cost Submissions (ICS)
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Forward Pricing Rate Proposals (FPRP)
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Price proposal audits
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Indirect cost structures
Cost Accounting Standards (CAS)
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CAS compliance audits
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Initial Disclosure Statement adequacy audits
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Revised Disclosure Statement compliance audits
Investigative Support
As an Investigative Support Auditor with DCAA's Office of Investigative Support (OIS), Mr. Abuan performed damage calculations and financial record analysis in support of federal investigative proceedings involving government contractors.
Who We Serve
Government Contractors
Accounting and advisory services related to accounting systems, indirect rates, incurred cost submissions, cost allowability, and government contractor accounting matters.
Commercial Companies Entering Defense Contracting
Advisory services for companies pursuing their first Department of Defense contract, OTA agreement, SBIR award, or other federal contracting opportunities.
Small Businesses
Bookkeeping, accounting, tax preparation, tax planning, and advisory services tailored to growing businesses.
Individuals
Individual income tax preparation and tax planning services.
Professional Credentials
Credentials & Professional Affiliations
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California Certified Public Accountant (CPA)
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Former DCAA Senior Auditor
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Former DCAA Investigative Support Auditor
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Intuit ProAdvisor — QuickBooks Online Level 2
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Intuit ProAdvisor — Client Advisory Services Foundation
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Member, American Institute of Certified Public Accountants (AICPA)
Memberships and certifications reflect professional training and participation and do not constitute a guarantee of service quality or outcome.
Scope of Practice
What This Firm Provides
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Government Contractor Advisory Services
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Accounting Services
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Bookkeeping Services
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Tax Preparation
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Tax Planning
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Advisory Services
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Consulting Services
What This Firm Does Not Provide
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Financial Statement Audits
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Reviews of Financial Statements
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Compilations with Attest Reports
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Agreed-Upon Procedures
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Examinations
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Other Attest Engagements
Financial statements prepared by this firm are for management use only and do not constitute an audit, review, or compilation report.
Important note Regarding DCAA Audit Support
"DCAA Audit Support" refers solely to advisory and consulting assistance provided during audits or reviews conducted by DCAA or other government agencies.
These services do not involve the performance of independent audits by this firm and do not result in the issuance of audit reports.
Why Work with Abuan CPA Corp.
Nearly 20 Years with DCAA
Experience evaluating government contractor accounting systems, cost submissions, and cost accounting practices.
Direct Access to the CPA
Clients work directly with a California-licensed CPA throughout the engagement.
Flexible Service Options
Virtual services are available to clients throughout California and across the United States. Local in-person meetings may also be arranged by appointment at client locations or another mutually agreed professional meeting location.s.
Practical Guidance
Focused on organized financial records, informed decision-making, and responsive service.
PROFESSIONAL DISCLOSURES
Professional Services Disclaimer
LICENSE & SCOPE OF PRACTICE
Abuan CPA Corp. is a California CPA firm providing accounting, bookkeeping, tax preparation, consulting, and advisory services. Abuan CPA Corp. is owned and operated by Ramiro Abuan, CPA, who holds a California CPA license. The firm's services are within the scope of general accounting experience and do not include attest engagements.
The firm does not provide audit, review, examination, compilation, agreed-upon procedures, or other attest services, and does not issue reports on attest engagements. Clients requiring attest services — including audited or reviewed financial statements — should engage a CPA firm licensed to perform attest engagements.
Financial statements prepared by this firm are for management use only and do not constitute an audit, review, or compilation report issued by an independent accountant.
"DCAA AUDIT SUPPORT" CLARIFICATION
"DCAA Audit Support" and similar service descriptions refer exclusively to advisory and consulting assistance provided to clients during audits or reviews conducted by the Defense Contract Audit Agency (DCAA) or other government agencies. These services do not involve the performance of independent financial audits or the issuance of audit reports by this firm.
NO GUARANTEE OF RESULTS
Advisory and consulting services provided by this firm are intended to help clients strengthen accounting practices, understand their obligations, and prepare for government reviews. All outcomes — including DCAA findings, contract awards, and regulatory determinations — are subject to determination by the relevant government agency. No specific outcome, approval, or finding is guaranteed.
AFFILIATIONS & CERTIFICATIONS
Membership in professional organizations and possession of third-party certifications (including Intuit ProAdvisor certifications) does not imply endorsement of any specific service, outcome, or result. These credentials reflect training and professional participation, not a guarantee of service quality or outcome.