Alex Thacher


You can’t move forward if you don’t get going.

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Meet Alex

As the National Practice Leader of Armanino’s State & Local Tax (SALT) practice, Alex brings over 20 years of technical experience in multi-state income/franchise tax, sales/use tax, local taxes, and credits and incentives. Alex has served clients across sectors including technology, retail, media and entertainment, utilities, pharmaceuticals, manufacturing, telecommunications, government contractors, e-commerce, software, construction, engineering and financial services.

Alex’s technical expertise includes unitary and consolidated filings, mergers and acquisitions consulting and due diligence, the development, evaluation and implementation of restructuring plans, apportionment reviews and planning, ASC 740 and ASC 740-10 reviews, audit representation, transaction analysis, residency audits, nonresident withholding, Wayfair nexus studies and voluntary disclosure negotiations.

Geographically, Alex has practiced in the Northeast, the Mid-Atlantic, California, and the Pacific Northwest. Prior to joining Armanino, Alex served as Ernst & Young’s State & Local Tax Services Leader in Seattle, WA.

In addition to providing SALT services, Alex has lectured on a variety of state tax matters for organizations such as the Los Angeles County Bar Association Taxation Section, Tax Executives Institute (TEI), California Tax Bar, Strafford Publications, and the Council on State Taxation (COST). Alex has instructed the Unitary Business Principle and Apportionment sections of COST's SALT Basics School, and he has a Podcast on Los Angeles City Business Taxes available on Apple iTunes.

A licensed attorney in California, Connecticut, New York, and the District of Columbia, Alex is a former instructor for the Council on State Taxation (COST). He holds a bachelor’s degree in psychology from Boston College and a Juris Doctorate from the University of Connecticut, School of Law. Alex is a California Tax Education Council (CTEC) Registered Tax Preparer and a Registered Lobbyist with the City of Los Angeles.

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Professional History


  • California Bar
  • Connecticut Bar
  • District of Columbia Bar
  • New York State Bar
  • United States Tax Court


  • Boston College
  • University of Connecticut, School of Law


  • Ernst & Young LLP
  • Deloitte LLP
  • PricewaterhouseCoopers LLP (PwC)
  • Arthur Andersen LLP
  • The Law Offices of Nancy Ann Lara-Moscardini


  • 2014 EY State & Local Tax Client Service Team of the Year – Team Leader.
  • 2011 Deloitte Multistate Development Conference Award for Excellence – Innovation.
  • 2011 Deloitte Mentor of the Year Award.
  • 2010 Co-Chair for the PwC United Way EITC Campaign at El Centro del Pueblo VITA site. Recognized with Service Award from the United Way, El Centro del Pueblo and the California Controller’s Office.
  • Nominated for the PwC Chairman’s Award in 2007 and 2009.
  • Recipient of 2007 Coaching Award by PwC’s Great Place to Work Committee

Speaking Engagements

  • “Current California Tax Issues: New Sales Tax Nexus Thresholds, Market-Based Sourcing Rules, Pass-Through Entities, and Local Taxes” - October 2019, Strafford Webinar
  • “Nexus Maybe: Doing Business in California” - Panel Moderator - 2013 California Tax Policy Conference & Annual Meeting of the California Tax Bar
  • “What’s New in Los Angeles City Tax” - 2012 California Tax Practitioner’s Conference
  • “Apportionment Issues Faced by Today’s State Tax Practitioner” and “Current Developments in Pacific Southwest States” - 2010 and 2011 COST Pacific Southwest Regional Meetings


Q. What is it about the accounting or consulting profession that first drew your interest?

My state and local tax professor Rick Pomp’s passion and excitement for SALT is infectious. He has an uncanny ability to take complex tax topics and make them exciting and relevant in a way that resonates with young, curious minds. He ignited my interest in mastering the complexities of state and local tax, and that interest has evolved into what is now my career. My passion for SALT has not waned, and I hope to provide similar experiences for those I work with and the clients I serve.

Q. What was it that drew you to Armanino?

Armanino encourages an innovative and entrepreneurial mindset that allows me to make an impact on the lives of those around me. Constant personal growth while simultaneously adding value for my clients and teammates is core to what makes me fulfilled from a career perspective, and Armanino lets me do what I love in a firm that has long term goals that align with my own.

Q. Make a prediction and describe your vision of the future of the general business environment for your area of expertise or the industries you serve.

The evolving economy and ecommerce globalization continues to change the ways in which we interact and do business. Due to changes including Wayfair nexus, tax reform and state conformity, state and local governments are struggling to keep pace. As they catch up to the way business is modernizing, the materiality and overall significance of state and local tax will continue to rise.

Q. What is the toughest decision you have ever made?

The toughest – but most rewarding – decision I’ve made was joining my family’s law firm after having spent over 17 years within the Big 4. Through this experience, I gained a different perspective on my clients' businesses, as well as their personal needs, goals and desires. It enhanced my ability to relate to not only to the business challenges they face every day, but the personal ones as well. It gave me deeper sensitivity to my clients as individuals and how I can contribute to help them achieve positive outcomes. My experience there was unexpectedly fantastic, and I grew in ways that make me better at what I do today.

Q. Describe your work style.

Collaborative. I want to be empowered and to empower those on my team. I strive to support and encourage, and give them a safe environment to learn and grow, so they can provide as much value to clients as possible. I am constantly preparing my team to be able to do what I do.

Q. Who is (or was) the most influential person in your life?

My mother and grandmother. I got a chance to sit in the audience at my mother's law school graduation. Seeing her go back to law school, obtain her law degree and ultimately achieve the career goals she had set for herself was an indelible positive example for me. My grandmother is 102 years old and she still volunteers at the Tiburon thrift shop two weeks out of every month. I am consistently inspired by her boundless positive energy and zest for life.

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Industries Served
Alex's Thought Leadership
FAQs: Find Gaps in Your SALT Compliance With These 7 Questions
Identify gaps in state and local tax (SALT) compliance and discover where you may need to address outstanding issues.

February 23, 2023
Florida, Kansas and Missouri Pass New Economic Nexus Sales Tax Laws
If you have customers in Florida, Kansas or Missouri, you may now be required to collect and remit state sales tax.

July 21, 2021
California Illinois Federal Cap SALT Deductions for Individuals
California and Illinois proposed bills to bypass the federal limit on state and local tax deductions for individuals.

July 06, 2021