Accountants are everywhere, but accountants that are knowledgeable, can explain things in terms I understand, and are customer centric are rate. We have happily used ROI for the past 8 years. Their knowledge and expertise has helped my business and myself grow. I can't recommend them highly enough! Thanks again ROI for your assistance.

- Mike, Bartlett

ROI has become a trusted partner in only two short years since we began working with them. Mark and Kathy cleaned up a complex situation in our books resulting from a change in our business entity...which our previous accountant failed to address. Mark has been a valuable resource in helping us understand the implications of the new tax plan and has recommended actions accordingly. ROI is a professional firm that proactively advises and supports its clients.

- Matt, Bartlett

I’ve been a client of ROI Business Services since 2009 for all my business accounting matters, as well as personal taxes, and I couldn’t be more satisfied. Mark Mirsky is an expert CPA professional, knowledgeable about the latest tax laws and regulations. ROI took over the accounting for my corporation when it was experiencing fast growth, $1M+, with employees and vendors located in several states. It had become really complicated, at least from my perspective, but Mark and his team have done a great job since the very beginning of our relationship to smooth multistate issues, always providing sound advice over the years. His team is very detail-oriented, asks the right questions, and all returns and filings are done promptly and accurately. I have great trust in ROI and highly recommend them for both business and personal tax needs.

- Jean J., Naperville

In my industry, I frequently come across businesses that are unsure of why they are taxed a certain way or why they are set up a certain way or the implications that come with being an S-corp, C-corp, Partnership or LLC. Every client I have that is with ROI Business Services understands all of that. They become a partner of your company and are invested in the welfare of every business they work with. It is one thing to have an accountant, it is another thing to be partnered with ROI Business Services. Best Accounting firm I have ever come across.

- Kevin, Elgin

Mark and his crew really know their stuff. And they don't just do your taxes and kick you out the door. They are thorough and work very hard to get you every penny back that you deserve. Plus they offer small businesses great advice about revenue growth, asset purchases, loans and distributions, etc. Full service!

- Paul, Bartlett

I have been using ROI Business Services for both my business (Doorwayz Unlimited) and personal taxes for the past couple of years. They do more than just prepare my tax returns, they listen to my concerns and explain tax laws that directly relate to my situation. Because of their personal attention and teaching, I have gained a better understanding of tax laws and business financing. Mark Mirsky and his professional, high quality support team, have created customized plans for us. We work together throughout the year for our short and long-term goals towards positive cash flow management. ROI has earned a 5-Star Review from the team at Doorwayz Unlimited.

- Roger Diener, Schaumburg

I have been using ROI Business Services for my business and personal taxes the past several years. Not only did they manage to clean up the mess left by my previous accountant, but they have helped me actually learn the "why" behind what they do, which helps me as a business owner to have a better understanding of the finances and taxes. I trust their expertise and value the time they take to make sure I know what's going on.

- Jen, Elgin