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John R. McGuire & Associates

Welcome To McGuire Law Firm

At The McGuire Law Firm, headquartered in Denver, Colorado, our tax and business attorneys are dedicated to helping clients navigate IRS challenges, audits, business tax issues, and other tax-related concerns, ensuring compliance with tax regulations for both individual and business needs.

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Denver Tax & Business Attorney

About McGuire Law Firm

The McGuire Law Firm, founded by attorney John R. McGuire, provides assistance with IRS Debts & Disputes, Tax Law, Tax Planning, Business Law & Transactions and estate planning.

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.


Servicing all of Colorado: Denver Metro, DTC, Broomfield, Lakewood, Littleton, Golden, Boulder, Aurora, and Colorado Springs. 

Experts In Tax Law

Areas Of Concentration

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Individual Taxation

In addition to assisting clients with their IRS matters, a tax attorney at The McGuire Law Firm can assist you with your individual tax questions and issues that impact your individual income tax returns.

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Business Taxation

Many tax considerations must be made as your business operates and regarding the eventual sale of  business interests, your business as a whole and the business assets.

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Gift & Estate Taxation

The disposition of your property whether during life (through a gift) or at death requires proper tax considerations and planning.

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IRS Matters

We  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.

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Business Law

The McGuire Law Firm will advise clients who are just forming their first business to businesses and business owners that have been in business for many years.

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Estate Planning

Your estate plan will outline how you will leave your assets to your loved ones.  It does not always matter what you leave, but how you leave it!

Free Consultation

Contact McGuire Law Firm today for general inquiries.

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    Our Expertise

    Why Choose The McGuire Law Firm?

    We specialize in Tax Law, IRS Matters, Business Law and Estate Planning. 

    The McGuire Law Firm has been helping clients throughout Colorado better understand their current tax situation and the strategies used to help achieve their desired outcome. Call today for a free consultation.


    Words From Clients

    • John is by far the top tax lawyer in Colorado. I called around and many of his competitors will scare you into much higher rates, at a time your most vulnerable.

      Mike S.
    • John McGuire has been an excellent attorney for us, but he has also been a tremendous wealth of information on a variety of business issues. He is learned, thoughtful and insightful.

      Brooke S.
    • John McGuire is an excellent tax attorney. My experience with him has been fantastic. His advice is tempered with expert knowledge of tax law and how the IRS operates along with true concern and effective advocacy for his client’s position.

      Robert J.