Master Accounting and Tax Service, LLC (MATS) strives to provide the client with quality accounting, tax, bookkeeping, and fractional CFO / controller services at an affordable cost and with the utmost integrity. We work with small businesses and enterprise-level companies in Phoenix, all over the state of Arizona and Southern California.

We are working toward becoming a “paperless office” as well as an internet-based company. We offer our clients the convenience of dealing with us strictly online. We provide all of our clients with a secure, encrypted web portal to always have all historical tax documents at their fingertips and to provide them with a secure means to transfer information to us or receive information from us.

The owner, Bill, brings a rare level of tax expertise to the table for clients; he has been a practicing accountant for over 25 years, working for government agencies as an auditor, businesses as a staff accountant, an assistant controller and controller. In 2004, Bill established MATS and operates his growing accounting and tax practice headquartered in Tempe, serving all of Arizona and Southern California.

  • 20+ years experience in taxes and payroll
  • A+ BBB Business Review Rating
  • Credentialed Enrolled Agent on staff
  • Experienced government tax auditor
  • Staff consultant for businesses
  • Secure and encrypted online capabilities
  • Registered tax return preparer and Valid PTIN holder

“The job of a tax accountant is to protect their client by ensuring that the client is taking advantage of all available tax-saving opportunities as well as paying only their share of tax liability by preparing an accurate and honest tax return.”Owner, Bill Mease

 Honesty and Integrity – It is of utmost importance that we provide all of our services in an ethical and fair manner.
 Quality – We strive to provide the highest quality service possible to our clients that will meet or exceed their expectations.
 Professionalism and Knowledge – We are continually learning and growing in order to provide our clients with the most current tax law and advice.
 Dignity and Respect – We treat every client with dignity and respect.