Accounting. Done. Right.

Merlin Cavallin CPA PC

a fully licensed CPA firm based in Houston, TX serving clients all over the nation

Big firm capability. Small firm personality.

Peace of Mind
Our staff of CPA’s and QuickBooks Pro Advisors are experts in the accounting industry.

Be in Control
Don’t let unexpected IRS notices or NSF’s derail your progress. Our financial reporting will allow you to navigate your business to success.

True Accounting
We aren’t just entering data, we are reviewing it and presenting it to you in a meaningful way. That’s the difference between bookkeepers and accountants. In addition to bookkeeping , our CPA staff is here to provide guidance.

Flexible Plans
Whether you’re just starting out or an established enterprise, we have a service plan to meet the needs of your business.


    feel more confident with a CPA

  • Americans

    use a CPA


    get larger refunds with a CPA

  • satisfaction

    are satisfied with our CPAs

Our Services

Tax Services

Individual, Business, or Resolution, our expert CPA staff will make sure you have every deduction.

Business Accounting

From general ledger clean up to customized monthly reporting, we have all of your accounting needs covered.

QuickBooks Services

We’ll customize QuickBooks Online to your specific needs. Unleash the power.


Automate and streamline all your processes with a technology update.

Do you feel that technology is giving your competitor an edge over you ?
Act now and know how technology can change the game for you!

Our Team

Merlin Cavallin
Merlin Cavallin
Managing Partner
Merlin is a Certified Public Accountant and holds a Bachelor of Arts in Business Administration and a Masters of Science in Accountancy. He originally founded our partner firm, XpressCPA in Hampton, Virginia, before starting Merlin Cavallin CPA PC in his hometown of Houston, TX.
Mary Carmody
Mary Carmody
Tax Partner
Mary is a licensed CPA in Texas and holds a Bachelor of Business Administration from the University of Texas at Austin. She is a big 4 alumni, worked as an IRS agent and has also served as Tax Director of a publicly-traded company in Houston.
Mark Eagan
Mark Eagan
Enrolled Agent
Fully licensed to practice before the IRS, Mark brings many years of experience in tax resolution and collection. When not fighting for our clients, in his spare time he is training his horses for racing.
Skip Mercier
Skip Mercier
Technology Officer
Skip has an expert level of knowledge in a vast array of information technologies and many operating systems including Windows, Macintosh and Linux. In addition to making sure client data is safe and accessible by employees, he also is always looking for new and innovative ways to implement technologies that better serve our customers.


We do more than prepare tax returns and input numbers.


A message from our founder

We built this firm on the belief that the accounting profession could do more than prepare tax returns and input numbers. We believe accountants have the obligation to offer value to our clients, and that’s what we strive to do.

Whether you’re an individual needing tax advice or a large corporation seeking strategic consulting, We promise an innovative, personal and efficient delivery of service.

We wish you prosperity and health. Thank you for visiting our firm.


Merlin Cavallin

Do check out our flexible pricing plans. Services starting just $249.