Big-Firm Expertise.
Small-Firm Attention.

Get clear, accurate Accounting, Tax, and International Compliance support — directly from a CPA.

Pierre Chayeb, CPA – Founder of Quantinuum CPA, providing accounting, tax, and international compliance services.
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Our Services

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Accounting & Financial Management


Accurate monthly books, cleanup support,
and ongoing financial clarity.

  • Monthly bookkeeping & reconciliations

  • Cleanup & catch-up accounting

  • AR/AP tracking and QuickBooks support

International compliance and cross-border tax guidance represented through global business imagery.

Tax Planning & Cross-Border Compliance


Proactive planning and full support for U.S. & international filings.

  • Individual & business tax filings

  • Quarterly tax planning

  • IRS, state, and international compliance

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Strategic Advisory & CFO Support

Forward-looking financial guidance to help you grow profitably.

  • Financial analysis & performance insights

  • Cash-flow & forecasting support

  • KPI dashboards and margin improvement

Why Clients Trust Us

Clear books. Proactive guidance. Direct access to a CPA — every time.

Data security and confidentiality protections provided by Quantinuum CPA for client financial information.

CPA-Level Expertise

Direct support from a licensed CPA
— not a junior team.

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Accurate, On-Time Financials

Reliable books and reports you can actually use.

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Proactive Tax & Compliance

Guidance on multistate and international issues.

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Responsive Communication

Clear answers quickly — no runaround.

What Clients Say

  • “Pierre made our books make sense for the first time. Fast, accurate, and incredibly patient — a huge upgrade from our past CPA.”

    Sarah M., eCommerce Owner

  • “Clear tax guidance and proactive advice. Pierre caught issues my previous CPA missed and saved us thousands.”

    James L., Construction Services

  • “International filing felt overwhelming until we hired Pierre. He explains complex topics in plain English and delivers on time.”

    Nadia R., Consultant

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Quantinuum CPA was built by Pierre Chayeb, CPA,MBA, to give business owners clear numbers, reliable guidance, and proactive support — without the jargon.

We bring a unique perspective shaped by global education — a BA from Lebanon, an MBA from Canada, and CPA licensure in the United States — giving us the foundation to handle complex, cross-border accounting and tax matters with clarity and precision.

Before launching Quantinuum CPA, Pierre worked with world-class organizations — Ernst & Young (EY — Big 4), DocuSign, and Blend Labs — where he refined his expertise in technical accounting, compliance, and financial operations at scale. We now bring that same level of rigor and clarity to small- and mid-sized businesses.

As a multilingual firm — Arabic, English, French, and Spanish — we work with diverse owners who want transparency in their numbers and confidence in their decisions.

About Us

Pricing Philosophy

Simple. Transparent. No surprises.

  • Clear, upfront fees based on your needs — no hidden hours.

  • Flat-rate projects or monthly plans for predictable budgeting.

  • Custom quotes for tax and international compliance work.

Ready to Get Clarity in Your Numbers?

If you’re looking for accurate books, proactive tax planning, or help with U.S. and international compliance, let’s talk.

Book a call

FAQ

  • I support small- and mid-sized businesses, entrepreneurs, and international clients who want accurate books, proactive tax planning, and reliable U.S. compliance.

  • Both — choose ongoing monthly bookkeeping or a one-time cleanup to get accurate, organized books.

  • Absolutely. I handle U.S. business and individual returns, state filings, foreign-owned entity compliance, and cross-border tax planning.

  • Clear, upfront flat rates with no hourly billing. You get a transparent quote before any work begins.

  • Book a free consultation call — we’ll review your goals, look at your books or tax situation, and outline next steps.

Let’s Make Your Next Step Easy.

Whether you need accurate books, tax planning, or international compliance — you’ll get clear, reliable guidance directly from a CPA.

Get Started