Anderson ZurMuehlen will become Pinion on January 1, 2023
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We're Here
For You

Our passion is to improve the lives of the people we work with by simplifying consulting and outsourced services. How can our Montana CPAs, business advisors, and tech experts help you?

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CPA & Accounting Services

Our Montana-based team of CPAs and accountants is here to support you in your personal and business accounting needs:


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Outsourced Business Services

Our team of AZ professionals provides clients with automated back-office outsourced services powered by AZ Leverage TM. 

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Wealth Management Services

Less than 50% of Americans are prepared for retirement. We've partnered with Avantax SM to create a tax-smart approach to financial planning. Are you prepared for your financial future?

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Businesses Technology Services

Technology changes so quickly, it can be difficult to keep up. Our team of technology experts is ready to tackle your technology needs:


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who we are

We Pride Ourselves in Employing Exceedingly Talented Professionals

When you choose AZ, you’re choosing a deep bench of industry experts dedicated to providing the best Montana CPA and technology services to businesses.

meet our shareholders

What People Are Saying About AZ

Great partnership with high ethical standards and a wide variety of services offered. AZ has been outstanding to have as a business partner. The relationship formed goes much further than just another year end tax filing.

Libbey Winderl

Google Review

I am an employee of AZ and am proud of their continued recognition, from AICPA, NASBA, 20 Under 40, the Governor’s Equal Pay for Equal Work Task Force and many more. To top it off, I also get to serve absolutely amazing clients every day.

Amy Cristaldi

Missoula Office

AZ has saved us a bundle of money and most of all relieved any anxiety about money issues. They keep us up to speed on our LLC as well as personal tax issues. Their advice on structuring ourselves wisely for retirement is invaluable.

Tony Marchi

Google Review

I am an employee at the Anderson ZurMuehlen Missoula office and am so impressed with the leadership of this office. They care about the wellbeing of their employees, as well as the quality of work they are delivering to clients. Truly a stellar group!

Maddie Starke

Helena Office

Latest News

Our Montana CPAs, business advisors, and technology experts are dedicated to delivering valuable information and resources to you. Read our latest:

attest staff

Meet the New Members of Our 2022 Attest Staff

These accountants work primarily on audits of all types and will be the new friendly faces you'll see at your next audit!
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Employee Promotions

Announcing Our 2023 Promotions

We are pleased to announce the promotions for our 2022-2023 fiscal year.
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Montana Tax Obligations Remote Workers

Current Expected Credit Losses (CECL) and the Impacts on Your Organization

Under CECL, organizations will recognize an allowance for credit losses that are expected to be incurred in the future.
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Our Awards & Affiliations

Montana CPA Regional Leader
Montana CPA Best Accountants in Billings
AICPA Nonprofit Accounting Certification
AICPA GAQC
Montana CPA Data Analytics
Montana CPA Fundamental Client Accounting Advisory Services
Anderson ZurMuehlen to Combine with Pinion

While we are expanding, your success remains our highest priority.

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