We at US Tax Consulting are experienced in every facet of US and Canadian taxation.
US Tax Consulting is located in Windsor, Ontario and offers a variety of accounting services including US and Canadian tax preparation.


We are a full-service cross border tax firm based in Windsor, Ontario, highly experienced in cross border taxation issues. We thoroughly understand the tax compliance requirements of Canada and the US. We are in the best position to develop effective tax planning strategies for residents of either country.

Chad Mrkonjic, CPA, MST


Our firm was founded by Chad Mrkonjic who is an accredited CPA (Chartered Professional Accountant) in Canada (1996), as well as a CPA (Certified Public Accountant) in the US (Colorado) (2013). Chad has lived in Windsor, Ontario for most of his life and is an alumnus of the University of Windsor (1997). He also holds a MST (Masters in Taxation) (2019) from Golden Gate University in San Francisco, CA.

Chad has worked in the accounting profession for over 40 years, including being the controller of several local companies. He has also worked independently in tax preparation for the same length of time, helping individuals and businesses with their tax needs. Chad has found a niche in cross border tax consulting and preparation, which requires specialized knowledge and expertise in both Canadian and US taxes.

Chad Mrkonjic is a Certified Public Accountant in Canada and the US, as well as a Certified General Accountant in Canada.

Juan M. Ramirez, MSc

Juan joined the firm in 2022 bringing his experience in US taxes and corporate accounting. Juan studied Management Engineering in his native Colombia, graduating in 2004. He and his wife then relocated to Houston TX where he obtained his MSC in Accounting (2009) at the University of St. Thomas. Since then, he has worked in public and managerial accounting for different companies and industries. He and his family came to Canada in 2014 and have lived happily in Windsor, Ontario since then. He is currently working towards becoming an Enrolled Agent with the IRS. Juan is a native Spanish speaker and is interested in helping the rapidly expanding Hispanic population with their tax needs.

Juan Ramirez joined the firm in 2022, experienced in US taxes and corporate accounting.

Our team of professional accountants are ready to assist you for all your accounting needs.