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Corneliuson or CSI? (Minneapolis Monthly Accounting Services / Pricing / Reviews)

August 25th, 2026 | 8 min. read

By Miranda Evers

woman comparing the CSI and Corneliuson logos

Looking for monthly accounting services near Minneapolis, Minnesota? If you’ve narrowed it down to Corneliuson & Associates and CSI Accounting & Payroll, then you’ve done great research already.

Corneliuson and CSI both serve small businesses and most industries. According to reviews, they both provide top-notch communication and client experience. They even follow similar business models.

So, which one is a better fit for your business? It comes down to your preferences in these areas:

  • Services offered.
  • Pricing (and pricing transparency).
  • Reputation (shown by history, awards, and reviews).

Services Offered

Because of their similar business models, the firms offer nearly the same services.

Corneliuson’s Services

Corneliuson & Associates offers the following services:

  • Monthly and quarterly bookkeeping.
  • Financial statement preparation.
  • Bank and credit card reconciliations.
  • A/P and A/R support.
  • Payroll services, payroll coordination and reporting, and payroll tax return filings.
  • Sales tax and local tax compliance.
  • Year-end accounting and tax-ready financials.
  • QuickBooks and cloud accounting support.
  • Business and technology advice.
  • Tax preparation and planning services for businesses and individuals.

This is a standard monthly accounting service with everything you’d expect. If you’re truly just in the market for monthly accounting, annual taxes, and maybe even payroll, then Corneliuson is a solid choice.

CSI’s Services

CSI Accounting & Payroll offers the following services:

  • Monthly accounting. Bookkeeping, financial statements, bank and credit card reconciliations, unlimited one-off advice, and A/P and A/R guidance.
  • Business tax projections, preparation, and filing. We also handle individual taxes for our monthly accounting clients.
  • Consulting. Unlimited one-off advice is included in our monthly accounting service. Add-on consulting services are available for large projects.
  • Full payroll service.

We do the same things as Corneliuson, but also have trusted partners that help us provide even more, if that’s something you’re looking for:

  • 401(k) plans for you and your employees.
  • Pay As You Go workers’ compensation insurance.
  • HR plans.

Pricing & Transparency

Pricing is where things get interesting. If you are a small or midsized business in most industries, your investment will look very similar between the two firms. However, some things are expressed differently.

Corneliuson’s Pricing

Corneliuson’s pricing page shows three monthly accounting packages at $645/month, $895/month, and “Call for Custom Quote.” (Note: The packages are sorted by business complexity, meaning you’d fall under one, not select one. Plus, since they’re customizable, it's unclear why they exist.)

If you keep scrolling, pricing starts to make sense. There’s a Monthly Cost Estimator that updates the total cost in real time as you check the boxes that apply to you. No need to submit your information!

If you’re in the early stages of shopping around and want to stay anonymous, Corneliuson’s Monthly Cost Estimator is a great place to start. Check it out!

CSI’s Pricing

CSI Accounting & Payroll talks about price differently. Our pricing page shows the current average and range based on our real clients. At the time of this article, the average monthly fee was $800, and the range was $600 to $1,500/month.

Transparency is our priority. We give example scenarios for different price points, talk extensively about what affects costs, compare what an investment covers with us versus our competitors, and much more.

Then, put it all together by trying our Pricing Calculator, which is different than Corneliuson’s. Ours is more customizable, allowing more accuracy from the tool. (And you can estimate the cost of your payroll, too!) However, it doesn’t show real-time changes as you work through it; You only see your estimate and its breakdown at the end after you submit your information.

If you’re looking for a more accurate estimate and are considering talking to an expert about your results, CSI’s Pricing Calculator is for you. Try it now!

Reputation

To us, reputation and trustworthiness of a monthly accounting firm is shown in its history, awards, and reviews.

Corneliuson’s Reputation

Corneliuson boasts 200+ clients served since 1998, with the average client staying for 7+ years.

Corneliuson has 75 Google reviews at a 4.5-star rating for one location and 10 Google reviews at a perfect 5-star rating for the other. Most reviews say that Corneliuson’s accountants are professional, address questions thoroughly, and are very responsive. Many of the negative reviews are just 1-star ratings (no statements), and Corneliuson's responses state that they don’t think they’ve worked with these people.

As for awards and recognitions, Corneliuson’s site doesn’t go into much detail. However, they show homepage icons that represent them winning the Professional Association of Small Business Accountants (PASBA) Accounting Firm of the Year and Lifetime Achievement awards.

CSI’s Reputation

CSI boasts thousands of clients served since 1966, with the average client staying for 5+ years.

CSI has two Google listings with about 500 reviews and an overall 4.9-star rating. Much like Corneliuson, almost all of our reviews say that our accountants are professional, thorough, and very responsive, with many calling out their accountant by name and talking about the close relationships they’ve formed. Read more about our reviews.

Awards get a front row seat on CSI’s site. Our dedicated page mentions that we’ve been recognized more than 100 times by review platforms, professional associations, and business communities for innovation, transparency, and dedication to client success. View our awards and recognitions here.

Find Your Match!

Corneliuson and CSI Accounting & Payroll have many similarities. Now that you know about their small differences in services offered, pricing and transparency, and reputation, are you ready to talk?

If so, please consider CSI Accounting & Payroll! To see if we can be a good fit for your business, click the button below for a free consultation:


Not ready to talk? That’s okay! First, make sure you’ve tried our Pricing Calculator!

Miranda Evers

Miranda is our Content Manager. She earned her Marketing degree from Southwest Minnesota State University and had a background in small business marketing before joining CSI in 2020. While she has no formal background in accounting or payroll, she's spent hundreds of hours interviewing our experts to create content that the average business owner can actually understand. Her fresh perspective was key in building our Learning Center from the ground up – starting with the basic concepts our specialists didn’t realize needed explaining.