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Derek William Kaczmarek

Tax Attorney at Scottsdale, AZ

5.0   11 reviews

also known as Derek W. Kaczmarek

Virtual consultation available
Virtual consultation available
  • State Years
    Nevada - NV 11 years
    Arizona - AZ 12 years
    Illinois - IL 19 years
    Indiana - IN 20 years
  • Licensed for 11 years
    State NV
    Acquired 2012
    Active No misconduct found
  • Licensed for 12 years
    State AZ
    Acquired 2011
    Active No misconduct found
  • Licensed for 19 years
    State IL
    Acquired 2004
    Voluntarily Inactive No misconduct found
  • Licensed for 20 years
    State IN
    Acquired 2003
    Inactive In Good Standing No misconduct found

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

About Derek

Learn Derek’s areas of practice.

Practice areas
  1. Tax
    Tax litigation areas include 831(b) captive insurance, alleged tax fraud and issues of first impression with a focus on litigation in the U.S. Tax Court.

    20 years, 1,000 cases

  2. Tax fraud and tax evasion
    Tax fraud representation from audits to litigation as well as assisting criminal defense in criminal tax cases.

    20 years, 50 cases


My tax law career started in 2005 as a trial attorney with the IRS in Las Vegas, Nevada.  Ultimately, my IRS career took me to Phoenix, Arizona.  In 2012 I left the IRS and entered private practice.  During my post-IRS career, I rose to the practice group manager for tax litigation at an AmLaw 200 law firm.  In 2019, I opened my own law firm with another former IRS attorney, David Jojola.  

Over the years, my practice areas remainded consistent - tax litigation and controversy.  The biggest change?  Representing businesses, individuals, estates, and trusts rather than the IRS.  I handle numerous tax disputes, from pre-audit and audit to administrative appeals through litigation.


AV Preeminent Peer Review Rating

Photos and videos

NBC 12 News - 2015 Lawyers on Call


Kaczmarek & Jojola PLLC
Kaczmarek & Jojola
9555 Hillwood Drive
Suite 150
Las Vegas, NV, 89134
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5.0 / 5.0
  11 customer reviews
5 Star
4 Star
3 Star
2 Star
1 Star
Posted by Rhonda Collins | October 7, 2022
This review is from a person who hired this attorney.
| Hired Attorney
I had eviction removed from my credit report, and I still can’t believe PINNACLE CREDIT SPECIALIST raise my credit score to 804 excellent score within few days. He also helps me apply for PPP loan with the sum of $35k which reflect in my bank account with a low interest rate. I saw a lot of good reviews about his works and he would respond swiftly. Hire him: [email protected] you can also call or text on: +1(585) 466 4373.
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Posted by Marty | May 13, 2022
This review is from a person who hired this attorney.
| Hired Attorney
Tax Concerns
Derek Kaczmarek and David Jojola are the best. They represented us with IRS Concerns and saved us several thousands of dollars. They are honest and genuine. Very approachable and best of all very knowledgeable!!
Posted by MarkP | December 22, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Relief from Tax Delinquency
Mr. Kaczmarek and his partner, Mr. Jojola were incredible in their assistance with my IRS tax delinquency crisis. They brought complete confidence and reassurance during the process; and navigated me to a completion of the ordeal and a savings of over $50,000.00. I forever grateful, and thankful in my choice in them.
Posted by Scott | July 23, 2015
Simply the finest Lawyer you can have represent you!! None Better....
A pleasure to work with, brilliant and honest. Has an incredible knowledge of how the IRS works and can navigate you through any issue. I cant say enough about Derek! one special lawyer! the Best of The Best...
Posted by Judy | January 21, 2015
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
A true expert
Derek is the most knowledge attorney I have spoke with regarding overseas unreported assets. I am assisting my aunt handle an estate of a man who we have just learned never reported overseas holdings and had not filed a tax return since 2000. Derick provided information on the various programs available under these circumstances and where to begin. He even took the time to research a particular and point and send a follow up email. We will be retaining his services for this matter.
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Posted by Dave and Robin | January 13, 2015
IRS Tax Matter
We had a letter from IRS saying we owed $247,000 on our 2012 taxes. We know we didn't because we didn't even make that amount. We asked around for a tax attorney and was given Derek Kaczmarek's name and contacted him. With all our paperwork in hand we sat down and he understood the issues and drafted a letter to the IRS. The letter was comprehensive and outlined the issues that the IRS had with our tax return. Based on the information in the letter, the IRS reviewed our taxes and advised us that the correction was only $290. We were relieved and it would not have happened without the help of Mr. Kaczmarek and his assistant Dianne.
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Posted by Dave | February 20, 2014
My bank account was being levied and I owed the IRS 170k+
Derek is one of the best lawyers I have ever had the pleasure to work with. My bank account was being levied and I had a tax debt going going back to 1999 and 2000 in excess of 170K and was in desperate need of help. I emailed Derek files pertinent to my case and when I arrived at the initial consultation (even before I had agreed to his services) he had reviewed those files and had came up with strategies on how to handle the situation. He is a former IRS trial attorney and has total knowledge of all things related IRS collections and debts. IN LESS THAN A WEEK he had the levy released and I was able to access the funds in my bank account. He also had given me the best plan on how I should deal with my debt. A problem which had dogged me literally for over a decade that I thought might never be resolved--he showed me the way out in a week. I cannot recommend this guy enough. I had initial consultations with three different lawyers before I decided to go with Derek. He just stood out from the rest and I got a good feel with him and luckily my instincts proved correct.
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Posted by anonymous | January 25, 2014
Great Tax attorney!
Derek is a wonderful attorney! He cares about his clients and will do the best that he possibly can for them. I appreciate that he is completely honest with his clients. He understands tax law very well and I have trusted him and will to continue to trust him with my tax issues. I would heartily recommend him as an advocate for others.
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Posted by Dave | June 26, 2013
IRS Tax problem successfully and Professionally Handled
I was extremely pleased with Derek's handling of this IRS Tax problem. Even though I tried several time to respond to the IRS's letters of unpaid taxes from 2010, it became apparent that the IRS would not listen to a lowly taxpayer and that more 'horsepower' was going to be needed to convince the IRS that NO taxes were owed but rather the problem rested with BBVA Compass Bank for not reporting 1098 mortgage interest paid and incorrectly reporting 1099 Interest earned to the IRS. A great job acting as my representative with the IRS and with keeping me informed on the status of where things stood.
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Posted by anonymous | March 15, 2013
Highly Qualified
I sought counsel on a number of tax related topics and Derek gave very honest and comprehensive advice. I have total confidence in his proficiency and guidance.
Posted by Rich | December 19, 2011
Interim General Counsel, Ports of Indiana
Positively one of the best attorneys we've worked with. Has an uncanny knack for making a complex legal problem/opportunity understandable to management. A brilliant legal mind coupled with savvy business experience applicable to both the public and private sectors. He's a highly effective problem solver and researcher who takes pride in delivering the best solutions for his client. He adds a new dimension to an executive management team because he combines infinite legal wisdom with an understanding of the client's goals to formulate a plan to achieve the best possible outcome.
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  • Hourly Rates $ 425-425 per hour
Payment methods
Cash, Check, Credit Card


AVVO RATING 10.0 (Superb)

Work Experience

  • Partner
  • Kaczmarek & Jojola
  • 2019 - Present
  • Member
  • Dickinson Wright PLLC
  • 2017 - 2019
  • Partner
  • Frazer Ryan Goldberg & Arnold
  • 2014 - 2017
  • Attorney
  • Silver Law PLC
  • 2012 - 2014
  • Senior Attorney
  • I.R.S. Office of Chief Counsel
  • 2005 - 2012
View all work experience


  • New York University School of Law
  • LL.M.
  • 2005
  • Indiana University School of Law, Bloomington
  • J.D.
  • 2003
  • Indiana University-Bloomington
  • M.B.A.
  • 2003

Sample of Legal Cases

  • Caylor Land & Development Inc., Et Al. v. Commissioner, T.C. Memo. 2021-30
  • Rule 155 decision.
  • Estate of Moore v. Commissioner, T.C. Memo. 2020-40
  • Rule 155 Decision
  • Bruner v. Commissioner, T.C. Memo. 2018-10
  • Win, no attorney fees from IRS.
View all legal cases


  • AZ Board of Legal Specialization - Tax Advisory Committee
  • Commission Member
  • 2018 - Present
  • Western States Bar Association
  • Arizona Representative
  • 2012 - Present
  • State Bar of Arizona, Tax Law Section
  • Chair
  • 2018 - 2019
  • State Bar of Arizona, Tax Law Section
  • Chair Elect
  • 2017 - 2018
  • State Bar of Arizona, Tax Section
  • Vice-Chair
  • 2016 - 2017
  • State Bar of Arizona, Tax Section
  • Chief Budget Officer
  • 2015 - 2016
  • State Bar of Arizona, Tax Section
  • Secretary
  • 2014 - 2015
  • Scottsdale Bar Association
  • Board of Directors
  • 2013 - 2014
  • State Bar of Arizona, Tax Law Section
  • Member at Large
  • 2012 - 2014
  • State Bar of Arizona, Tax Law Section
  • Tax Court Liaison
  • 2010 - 2014
  • Indianapolis Bar Association, Tax Law Section
  • At Large Member
  • 2008 - 2009
View all associations

Languages Spoken

  • English

Honors and Awards

  • Arizona Super Lawyer
  • SuperLawyers
  • 2021
  • Arizona Super Lawyer
  • SuperLawyers
  • 2020
  • Best Lawyer - Tax Litigation & Controversy
  • Best Lawyers
  • 2020
  • Certified Specialist - Tax Law
  • State Bar of Arizona
  • 2013
  • AV Peer Review Rating
  • Martindale-Hubbell
  • 2013
  • Bronze Medal Litigation Award
  • SB/SE Office of Division Counsel, I.R.S.
  • 2011
  • Cube Award
  • I.R.S. Office of Chief Counsel
  • 2007
View all awards


Speaking Engagements

  • Monthly Meeting
  • IRC 831(b) Update
  • 2021
  • Captive Insurance Companies Association 2019 International Conference
  • Commonly Accepted Insurance Practices: Small Captives' Practices Compared to Commercial Insurance
  • 2019
  • Delaware Captive Insurance Association 2018 Spring Forum
  • Captive Insurance and the U.S. Tax Court
  • 2018
  • Tennessee Captive Insurance Association Annual Conference
  • Avrahami v. Commissioner, Gazing into the Crystal Ball
  • 2017
  • Monthly CLE
  • Micro-Captive Insurance and the IRS
  • 2017
  • State Bar of Arizona CLE Program
  • Is Your LLC Ready for an IRS Audit Under the New Rules?
  • 2016
  • State Bar of Arizona CLE
  • IRS Innocent Spouse Relief: Navigating the Process
  • 2015
  • Tax Section
  • U.S. Tax Court Practice - an Update and Perspective
  • 2014
  • CPA Lunch & Learn
  • US Tax Court Procedure
  • 2014
  • Recent IRS Audit Developments
  • Form 1099-K and Global High Wealth Industry Group
  • 2013
  • I.R.S. Office of Appeals (Phoenix)
  • I.R.C. 7430 and Qualified Offers of Settlement
  • 2012
  • 2012 State Bar Annual Convention
  • Federal, State and Local Tax Law Update
  • 2012
  • 2012 State Bar Annual Convention
  • Tax Issues in a Down Economy
  • 2012
  • I.R.S. Basic Trial Advocacy School
  • Tax Litigation
  • 2011
  • I.R.S. Special Enforcement Program Agent Group Meeting
  • Developing Fraud Cases for Trial
  • 2010
  • West Virginia University's Advanced Fraud & Forensic Accounting Program
  • Advanced Fraud & Forensic Accounting
  • 2009
  • Who Stole My Child Tax Credit? Single Parents, Custodians and Child Tax Credits
  • Child Tax Credit
  • 2004
View all speaking engagements

Attorney endorsements

Received (5)
Given (8)
Endorse Derek
Tax fraud and tax evasion Attorney | Mar 18
Relationship: Fellow lawyer in community
"Derek is an excellent trial attorney. He has an extensive background in IRS trial cases. We have worked together and I highly recommend him."
Tax Attorney | Jan 07
Relationship: Worked together on matter
"I endorse this lawyer."
Tax Attorney | Oct 04
Relationship: Opposing Counsel on matter
"I met Mr. Kaczmarek when I was helping a taxpayer dispute a tax assessment and Mr. Kaczmarek worked for the IRS. In working on opposite sides, it soon became clear that Mr. Kaczmarek was extremely bright and capable, yet always remained professional in his dealing with me and the taxpayer. He was a great advocate when he represented the government and is now a great resource for taxpayers."
Tax Attorney | Aug 16
Relationship: Worked together on matter
"I endorse this lawyer."
Tax Attorney | Dec 17
Relationship: Opposing Counsel on matter
"I endorse this lawyer."

Avvo Contributions

This attorney hasn't created any legal answers in Q&A or legal guides recently on Avvo.

Scottsdale Tax Lawyer Derek William Kaczmarek
Derek William Kaczmarek
Tax Attorney
Scottsdale, AZ
Licensed for 20 years
Virtual consultation available