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John Russell McGuire

Tax Attorney at Denver, CO

5.0   20 reviews
Free consultation
Free consultation
  • Licensed for 19 years
    State CO
    Acquired 2004
    Active No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About John

Learn John’s areas of practice.

Practice areas
  1. Business
    Assist with everything from proper business formation, acquisitions & mergers, taxation needs, transfer or disposition of business assets and interests, acquisition of additional capital, compensation planning, and liability issues. Make prudent and informed business decisions with our help.

    19 years, 750 cases

  2. Tax
    Assist clients in resolving IRS debts, audits and other matters, as well as applying the tax laws to our client’s individual and business issues. If you or your business are experiencing difficulties with the IRS or any other taxing authority, or just need tax advice, call 720-263-2030.

    19 years, 750 cases

  3. Estate planning
    Establish comprehensive estate plans to put your mind at ease. If you need assistance with Wills, Financial Power of Attorney, Medical Power of Attorney, HIPAA Release, Living Will, or even Organ Donation, contact us to start planning your estate today.

    19 years, 750 cases


John R. McGuire is a Denver tax attorney specializing in business transactions, tax planning for individuals & businesses and tax matters before the IRS.  John was born in Columbus, Ohio. He graduated from Indiana University in Bloomington, Indiana Magna Cum Laude and belonged to the Phi Beta Kappa National Honorary Society.  After moving to Colorado, John attended the Denver University College of Law and graduated in 2004.

Since joining the Colorado Bar, John has helped his clients with a wide range of issues. His work involves a variety of business transactions, including the formation and sale of business entities, expansion of business operations overseas, disposition and transfer of business assets and interests, and other ongoing transactions as needed by clients.

Additionally, John has helped his clients with their estate planning issues preparing wills and trusts to transfer wealth and assets. As a Denver tax attorney, John has represented hundreds of businesses and individuals before the Internal Revenue Service to resolve audits, tax liabilities and other tax controversies.

John went back to school to obtain a specialized degree in taxation while working full time, graduating from the University of Denver Graduate Tax Program with an LL.M. in Taxation.  While a student in the LL.M. tax program, John focused primarily on tax issues before the IRS, corporate & partnership transactions and estate & gift planning.  John received the Schramm Scholarship and Graduate Tax Program Scholarship, and worked in the low income tax clinic while attending the graduate tax program.

John also participated in the American Bar Association’s LL.M. Student Tax Challenge. He and his partner’s paper regarding the transfer of cash and business assets between foreign controlled corporations anonymously was chosen as one of four national finalists. As a national finalist, they traveled to San Diego, California to present before some of the most well-known tax professionals in the country at the ABA Tax Section Semi-Annual Conference.

John and his wife Suzette, an optometrist, live in Golden, Colorado.  In his free time, John enjoys skiing, rock climbing, mountaineering, backpacking, and spending time with his family and two dogs.  John is an avid Indiana Hoosier basketball and Ohio State Buckeye football fan.


Client's Choice 2014
Client's Choice

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Contact John

McGuire Law Firm
1860 Blake Street
Suite 400
Denver, CO, 80202
McGuire Law Firm
440 Indiana St
Golden, CO, 80401
McGuire Law Firm
7350 E. Progress Place
Suite 100
Denver, CO, 80111
McGuire Law Firm
11001 W. 120th Avenue
Suite 400
Broomfield, CO, 80021
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5.0 / 5.0
  20 customer reviews
5 Star
4 Star
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1 Star
Client's Choice 2014
Client's Choice
Client's Choice is an Avvo award granted to attorneys with a significant number of client reviews over 4 stars in a given year.
Posted by Chris | August 14, 2012
Best Tax Attorney in Denver, period!
I have worked with John McGuire, and his firm McGuire, Todd & Associates for over 3 years now and I have found them to fantastic! They have always been prompt in their communication, professional in the handling of our business / tax matters, and I feel that they have given me solid advice that has not only saved my business money, but has set me up for the best business structure possible. McGuire, Todd & Associates helped me to fix some past due tax issues, and helped me to better structure my business, which is saving me a considerable amount on my taxes. Their guidance has been great from a taxation and operational standpoint, and I would highly recommend them to anyone.
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Posted by Jerry | February 14, 2017
This review is from a person who hired this attorney.
| Hired Attorney
Outstanding assistance!
John has proven to be an exceptional resource to me in resolving my longstanding tax issues. He is one of the most patient individuals I have had the opportunity to work with. He is a very compassionate, understanding, and empathetic attorney who willingly works to find solutions to accommodate my needs. I highly recommend John to anyone seeking help in resolving IRS tax issues.
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Posted by James | December 20, 2017
This review is from a person who hired this attorney.
| Hired Attorney
Here is great tax lawyer
John is the best! I am retired attorney and so I can spot the good ones! I have had a long standing tax problem because of a business that closed almost a decade ago. I had tried everything to get it under control with no luck. I had tried all of the radio advertising tax services that you hear the commercials for- and got nothing. I had been through two of those tax services trying to get a refund owed my wife to no avail. I hired John and almost instantly he diagnosed the problem and set out to fix it and obtained the refund for my wife in short order. I also have an ongoing issue that he manages for me. It really is not resolvable in the near future- but John keeps the boogeyman away. He also prepares our taxes. He will make you feel reassured that you have someone who is truly an expert in tax issues. He is a lawyer with an advanced degree in tax. He is the real deal. That is what you need. You don't want to have to to worry about the qualifications of the guy you hire. What's more- he returns your phone calls and emails and texts promptly. The other day, I received a notice from the IRS in the mail. It scared me to death. He returned my text within 15 minutes. That's a miracle! So you can put your trust in John!
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Posted by Lloyd | December 2, 2017
This review is from a person who hired this attorney.
| Hired Attorney
My experience and results with McGuire were unbelievable!
John and the team at McGuire are unbelievably good. The IRS and the State of Louisiana were after me for a total of $325,000 in unpaid payroll taxes for the family business that I was affiliated with years ago. This situation was threatening to tear my marriage and my entire life apart. When the situation hit me, I contacted a dozen law firms and received a lot of "gloom and doom" talk along with requests for me to visit them and pay for a consultation. John was different - he was on it from the start and had a positive outlook. He was very easy and pleasant to work with always worked around my schedule. He and his team were so good throughout the entire process in managing both my case and my anxieties. John is extremely knowledgeable and was always genuinely optimistic about my case (much more optimistic than I was). The hard, smart, optimistic and aggressive work of the people at McGuire paid of as they got my personal liability reduced from $325,000 to $0! John and the the team got goth the IRS and the State of Louisiana to clear my record and drop all collection activity against me. The most incredible part is that McGuire got this done within 5 months after I engaged them! There is no doubt in my mind that John and the team at McGuire are the best out there.
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Posted by Carrie | June 5, 2017
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Valuable experience and knowledge
I have referred many of my own clients to Mr. McGuire over the years. And I have also consulted with him on important tax, trust, and estate issues. His ability to efficiently resolve problems and explain solutions is why I will continue to refer him and contact him for both my easier questions and more complex matters.
Posted by Robert | December 30, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Prompt, proactive, and professional tax help
I recently hired John McGuire to help me with a long-standing tax issue. I am beyond pleased with John's interactions with me, his advice, and—most importantly—his representation for my case. His fees and billing are straightforward and fair, and I found his work worth every penny, and more!
Posted by Brian | August 20, 2016
This review is from a person who hired this attorney.
| Hired Attorney
5 stars for John McGuire!
When I met John I was about 10 years behind on my taxes, and I was finally ready to handle my responsibilities and get things in order. After meeting with John, we dediced to move forward with an Offer in Compromise (OIC) to the IRS, as well as the state. I'm very pleased to say that due to John's work, the IRS accepted my OIC, and my tax debt was reduced to an amount I could afford. Thanks again John for all of your hard work!
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Posted by Shawna | May 25, 2015
John was a God-send for us. After closing our business due to a poor economy, we owed taxes we absolutely couldn't afford. John handled everything with the IRS for us, and got us settled in a way that worked for all involved. He knows what he is doing, and he was on point through the whole process, which was very long! (due to the IRS, of course). We can't thank him enough!
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Posted by anonymous | December 4, 2014
John gives clarity to a most unclear process
John consistently had a plan for our case and stayed the course. His advisement and insight was exceptional and resulted in a great outcome that came from his hard work. John is highly efficient in his communications and gives a sense of clarity to a complex process and sets realistic expectations.
Posted by anonymous | September 23, 2014
A real pro!
Reliable, thorough and great communication-- all the characteristics you would want in a good attorney. John is an excellent attorney and is highly recommended.
Posted by Louise | September 18, 2014
John McGuire recommendation
John worked very hard to get the information I needed to solve a legal situation I found myself in. I would recommend him highly for his dedication and earnest attention to my case.
Posted by Carroll M Senechal, EA | September 17, 2014
Knowledgeable, Personable and Competent
I have worked with John for two years now in a professional capacity and have found him to be a great resource for my tax law questions. John is knowledgeable, easy to work with and quick with an accurate answer.
Posted by Chris | September 17, 2014
Highly Recommended Attorney
John is second to none as far as I am concerned and I will continue using him for all my tax related issues. He is thorough, responsive, knowledgeable, empathetic to my personal situation, an absolute pleasure to work with, and always gives 100%. I have used other tax attorneys in the past and John surpasses them all in every area.
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Posted by greg | September 17, 2014
Trustworthy tax and estate planning
John came highly recommended and exceeded our expectations. Dealing with both complicated tax and estate issues, John helped us find a way. While never an easy topic to discuss, our estate planning went from something we avoided handling to feeling confident our children would be well taken care of. A joy to work with, trustworthy and extremely competent.
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Posted by Susie | January 15, 2014
Call John McGuire....
If your reading this review you most likely have tax problems. You probably worry 24/7, hate going to the mail box and feel hopeless. If this is the case please give John McGuire a call. Feeling hopeless I contacted John several years ago and he has been representing us ever since. He is honest, trustworthy and I can sleep at night because I know I have someone who is concerned and is in my corner!
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Posted by Paul | November 19, 2013
Great help with some tax issues
John helped my wife and I with some tax issues over the last couple of years. John is a great communicator and was able to explain what was going on, how we should handle things, and how to structure things going forward. I would highly recommend him to anyone dealing with tax issues.
Posted by anonymous | November 8, 2013
Highly-Recommended Tax Attorney
John McGuire has assisted me for many years, along with my business-partners, for our tax & business inquiries. John's knowledge of tax law and their application to business operations & transactions are excellent. What's great is his responsiveness and thorough work to identify our needs to reach an end goal. It's always a pleasure working & learning from John and I recommend him and his practice to the highest degree.
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Posted by Brady | November 8, 2013
Professional and knowledgeable -- highly recommend
Mr. McGuire helped me resolve a tax issue in the easiest, least painful way possible. I owed a relatively small amount of back taxes to the IRS, and that amount ballooned to nearly $50,000 after years of penalties and fees. I was about to have my wages garnished when I walked into John's office. He is professional, very knowledgeable, courteous and easy to work with. John worked with me to submit an Offer in Compromise, and I ended up settling with the IRS for less than $1,000. He stayed in close contact with me throughout the process and afterward, and I truly owe him a great deal for his efforts. He explained everything in great detail each step during the process, did all the heavy lifting, and all I had to do was sign off. Very easy to work with. His fees were more than fair, and his office was thorough and conscientious in regard to my situation. I would highly recommend Mr. McGuire to anyone looking to resolve a tax issue.
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Posted by Denise | August 29, 2012
He help us when no one would!
My husband and I owed the IRS a large amount of back taxes. We been out of work for a long time and living on our social security which was being garnished. We call around but no one wanted to talk to us because we have very little money. John talked to us. Accepted monthly payments and got us an Offer to settle our tax debt. IT took time but he was one of the few who would even speak with us.
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Posted by Christy | September 17, 2014
Great BK Attorney
John helped me with a couple of personal matters, including my bankruptcy, and he did a very thorough and professional job. I would definitely recommend him to anyone looking for an attorney.
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  • Free Consultation 60 minutes
Payment methods
Cash, Check, Credit Card


AVVO RATING 9.7 (Superb)

Work Experience

  • Owner/Attorney
  • McGuire Law Firm
  • 2013 - Present
  • Partner/Attorney
  • Buckingham & McGuire, LLC
  • 2013 - 2014
  • Partner/Attorney
  • McGuire, Todd & Associates
  • 2005 - 2013


  • University of Denver Sturm College of Law
  • LL.M. in Taxation
  • 2012
  • University of Denver Sturm College of Law
  • JD - Juris Doctor
  • 2004
  • Indiana University
  • BA - Bachelor of Arts
  • 2000


  • National Association of Tax Professionals
  • Member
  • 2005 - Present
  • Colorado Bar Association
  • Attorney Member
  • 2004 - Present

Languages Spoken

  • English

Honors and Awards

  • AV Preeminent Rated
  • Martindale-Hubbell
  • 2021
  • AV Preeminent Rated
  • Martindale-Hubbell
  • 2020
  • AV Preeminent Rated
  • Martindale-Hubbell
  • 2019
  • Rising Star
  • SuperLawyers
  • 2018
  • AV Preeminent 5.0 out of 5 Peer Review Rated
  • Martindale-Hubbell
  • 2018
  • AV Preeminent 5.0 out of 5 Peer Review Rated
  • Martindale-Hubbell
  • 2017
  • Section of Taxation
  • American Bar Association
  • 2012
  • Schramm Scholarship
  • University of Denver
  • N/A
  • National finalist
  • American Bar Association’s LL.M. Student Tax Challenge
  • N/A
View all awards

Speaking Engagements

  • American Bar Association, Taxation Section
  • Transactions between foreign controlled organizations
  • 2012

Attorney endorsements

Received (5)
Given (2)
Endorse John
Tax Attorney | May 21
Relationship: Worked together on matter
"John is a good tax lawyer who has a deep concern for his clients struggling with tax debt. He's very knowledgeable, and I've been happy to trade tax and bankruptcy information with him. I'm happy to endorse this lawyer."
Business Attorney | May 20
Relationship: Fellow lawyer in community
"I have worked with John for over 10 years and know him to be one of the most conscientious, thorough, and fair attorneys out there. John’s knowledge and background in taxation helps both his individual and business clients. John always takes the time to get to know his clients and understand their short and long term goals, which helps accomplish the tasks at hand, and builds strong long term relationships. My experiences with John have been nothing but positive and I would whole heartedly recommend John's services."
Tax Attorney | May 15
Relationship: Worked together on matter
"John possesses a wealth of knowledge in tax planning and business transactions. His creativity and command of the law in these areas sets him apart from fellow practitioners. Above all, John is dedicated to his clients and attempts to fashion their goals at a reasonable rate. I highly recommend John for all your tax planning and business formation needs."
Business Attorney | Jul 16
Relationship: Fellow lawyer in community
"I highly recommend John, both for his technical legal skills and for his warm and personable style. He has been a great resource for me with business planning and tax issues as they have come up for my clients. He is a pleasure to work with!"
Tax Attorney | Nov 11
Relationship: Co-worker
"Clients know immediately that John sets himself apart as an attorney. He cares about them and the quality work they receive while remaining cognizant of their bottom line. His long-term clients show the client loyalty he elicits. John holds himself to a high standard and balances his performance with graceful efficiency. As a passionate practitioner, John constantly remains updated on the law and practice management. John consistently impresses me with his knowledge of complex legal matters. He also has an innate ability to work with others. I recommend John in the areas of tax law, business law, and estate planning matters when you want an experienced attorney who cares about your satisfaction at the end of the process."
Estate planning
Estate planning