About Adham Abadier, CPA
CPA, Founder & CEO
Catalyst CPA Corporation
As a California-licensed CPA with 12+ years in accounting and tax, I combine rigorous due diligence with a tech-savvy toolkit to deliver accurate, timely results. Clients work with me because I’m proactive, I explain options clearly, and I back every recommendation with data. Whether you’re filing a complex return or scaling a business, you’ll get responsive communication, transparent pricing, and a partner who treats your finances like my own.
- Licensed
- California CPA #158599
- Rated
- 5.0 · Google reviews
- Certified
- QuickBooks Online ProAdvisor
- Based in
- Moreno Valley, California
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Credentials Verified by the California Board of Accountancy
Anyone offering CPA-level services in California must hold an active license issued by the California Board of Accountancy (CBA). You can verify any CPA’s standing — including mine — directly on the CBA license lookup. Here’s what’s on the public record:
California CPA License #158599
Active and in good standing. Issued by the California Board of Accountancy.
QuickBooks Online ProAdvisor
Certified by Intuit. Catalyst CPA holds Gold Tier ProAdvisor status for QuickBooks Online setup, cleanup, and bookkeeping.
IRS Practitioner Authorization
Authorized to represent clients before the Internal Revenue Service for audit, collection, and appeals matters.
If you’re hiring a CPA for tax or financial work, ask for their license number and verify it. It takes ten seconds and protects you from the unlicensed “tax preparers” who disappear when an IRS notice arrives.
How Catalyst CPA Works Differently
Most accounting firms in the Inland Empire are sized for either large corporations or seasonal tax-only work. Catalyst is built differently — for small businesses and individuals who want a real working relationship with their CPA year-round.
| What You Get | Catalyst CPA | Typical Local Tax Shop |
|---|---|---|
| CPA license | Yes — #158599 verified by CBA | Often “preparer” only, no license |
| Year-round availability | Yes — book a call anytime | January–April only |
| QuickBooks bookkeeping integrated with tax | One firm, one workflow | Separate bookkeeper + separate preparer |
| IRS notice response included | Yes for clients on retainer | Extra fee or referred out |
| Returns calls within 24 hours | Standard — same day if before 3pm PT | “We’ll get back to you in tax season” |
“I started Catalyst because too many small business owners had their books done by one firm, their taxes done by another, and their IRS notices answered by neither. Bringing all of it under one CPA license is how you actually save money — and stay out of trouble.”
What I Help Clients With
My practice serves three groups: small business owners who need bookkeeping and tax handled together, individuals with complex returns (real estate, K-1s, multi-state), and clients facing IRS or California Franchise Tax Board problems. Every engagement is signed and executed by me personally — no junior staff signing under a senior CPA’s license.
Small Business Bookkeeping
Monthly close, QuickBooks Online maintenance, sales tax filings, and clean financials your bank and tax preparer will actually accept.
S-Corp & LLC Tax Returns
Form 1120-S, Form 1065, K-1 distributions, reasonable compensation analysis, and the California $800 minimum tax handled.
Individual Tax Returns
Form 1040, Schedules C/D/E, multi-state filings, real estate investor returns, and California PTET elections.
IRS Notice Response & Resolution
CP2000 underreporter notices, CP14 balance-due notices, Offer in Compromise, installment agreements, and audit representation.
QuickBooks Cleanup & Setup
Chart of accounts rebuild, prior-period catch-up, bank reconciliation, and ProAdvisor-led migration from desktop or other software.
Business Advisory
Entity selection, S-Corp election timing, owner compensation strategy, retirement plan setup, and quarterly tax projections.
About Adham — Frequently Asked Questions
Is Adham Abadier a real licensed CPA?
Yes. California CPA License #158599, active and in good standing with the California Board of Accountancy. You can verify any California CPA license at the CBA’s public license lookup.
Where is Catalyst CPA located?
Moreno Valley, California — 13114 Yellowwood St, Moreno Valley, CA 92553. I serve clients across the Inland Empire (Riverside, Corona, Eastvale, Murrieta, Temecula, San Bernardino, Ontario), Orange County, Los Angeles County, and remote clients across the United States.
Do you work with clients outside California?
Yes. A federal CPA license combined with state-by-state registration where required allows me to prepare federal returns and most state returns nationwide. Clients across the US use Catalyst for bookkeeping, federal tax, and IRS representation — all delivered remotely with the same response-time standard.
What makes Catalyst different from a typical tax shop?
Three things. First, every return is signed by a licensed CPA — not by a seasonal preparer working under a CPA’s PTIN. Second, bookkeeping and tax happen at the same firm, so your books are already in tax-ready shape on January 1. Third, the IRS notice response that other firms charge a separate hourly rate for is included for retainer clients.
How fast does Adham respond?
Standard response time is within 24 business hours. Calls left before 3pm Pacific are returned the same day. There’s no after-hours voicemail purgatory — small business owners need answers when something breaks, not three weeks later.
Can Adham represent me before the IRS?
Yes. As a CPA I’m authorized to represent taxpayers before the Internal Revenue Service for examination, collection, and appeals matters. That includes responding to CP2000 underreporter notices, negotiating installment agreements, submitting Offer in Compromise proposals, and representing you in an audit.
What does the first call look like?
A free 30-minute discovery call. I ask about your business, your books, what year you last filed, what’s keeping you up at night. You ask me anything you want to know about how I work. There’s no sales script — just a conversation about whether Catalyst is the right fit.
Talk to Adham Directly
If you’re hiring a CPA, the right move is to talk to the actual CPA — not a sales rep, not an account manager. Book a free 30-minute discovery call and you’ll get me on the phone.
Free 30-minute discovery call. No sales script. No commitment.
Catalyst CPA Corporation · 13114 Yellowwood St, Moreno Valley, CA 92553 · California CPA License #158599 · (951) 223-1826