Ketel Thorstenson, LLP

Ketel Thorstenson, LLP

Reviews Summary

Ketel Thorstenson receives overwhelmingly positive feedback, with most reviewers praising their exceptional service, professionalism, and responsiveness. Clients highlight thorough tax preparation, personalized attention, and expert advice for both personal and business needs. Many appreciate the team's dedication, prompt communication, and ability to handle complex financial situations. A few negative reviews mention high fees or rejection as clients, but the vast majority strongly recommend the firm for their reliability, expertise, and customer-focused approach. Long-term clients particularly value the consistent quality and trustworthiness of their services.

About This Listing

Bookkeeping
Audit
Business Consulting
Payroll
Tax Preparation
Tax Planning
IRS Representation
Financial Advisory
Estate and Trust Tax
Forensic Accounting
Government Contractors
Non-profits
Real Estate
Healthcare
Hospitality
Construction
Manufacturing
Agriculture
QuickBooks
GAAP Compliance
Internal Controls

Who Can Work with a CPA?

Individuals seeking tax prep, retirement planning, or financial advice
Small business owners needing bookkeeping, payroll, or tax compliance
Freelancers and contractors with 1099 income or complex returns
Couples planning finances together or managing joint returns
Investors with capital gains or rental property income
Anyone looking for year-round financial guidance and peace of mind

*Note: CPAs may specialize in different areas. Be sure to check credentials and service offerings.*

First-Time Clients

If this is your first time working with a CPA, don’t worry — most professionals offer a free consultation and will walk you through what to expect. You may be asked to complete an intake form, share financial documents, or set clear goals for your session.

What to Know Upfront:

Documentation Bring your most recent tax returns, income details, and any financial concerns
Availability Appointments fill up quickly during tax season — book early if possible

*Note: Every CPA operates a bit differently. Don’t hesitate to ask questions before committing.*

What to Bring

Government-issued ID for verification
Tax documents (W-2s, 1099s, investment summaries, etc.)
Receipts or logs for deductible expenses, donations, or mileage

*Tip: Organize your documents in advance to save time and ensure accuracy.*

Preparing for Your Appointment

Write down any financial goals or questions in advance
Check if your CPA offers virtual sessions or document uploads
Bring a notebook or use a notes app for key takeaways
Know your deadlines for filing, payments, or compliance

*Note: Preparation helps you make the most of your CPA’s expertise.*

How to Get Started

Use our directory to find highly reviewed CPAs near you. Reach out directly to schedule your consultation.

Other Helpful Info

Many CPAs offer both in-person and remote consultations
Fees may be flat-rate, hourly, or based on service complexity
Some CPAs specialize in industries like healthcare, real estate, or tech
Check for client reviews and credentials (CPA license, EA, etc.)

*Note: Every CPA is different — take time to find one who fits your goals and style.*

Features

Bookkeeping
Audit
Business Consulting
Payroll
Tax Preparation
Tax Planning
IRS Representation
Financial Advisory
Estate and Trust Tax
Forensic Accounting
Government Contractors
Non-profits
Real Estate
Healthcare
Hospitality
Construction
Manufacturing
Agriculture
QuickBooks
GAAP Compliance
Internal Controls

Contact Information

Address

741 N Main St Ste. 230

Spearfish, South Dakota 57783

Hours

Sunday Closed
Monday 8AM-5PM
Tuesday 8AM-5PM
Wednesday 8AM-5PM
Thursday 8AM-5PM
Friday Closed
Saturday Closed

Customer Reviews

I do not recommend this company. I called them and asking them about taking on new clients. The person on the phone said I needed to go to their website and fill out an application to see if they wanted to accept me as a customer. So I did, it was very lengthy and then I had to upload my last year's tax return for their review. A day or so later I received an electronic repsonse from them letting me know that it would be $2,090.00 for them to prepare my personal taxes. (outrageous) Then a day later, I recei

We have had the pleasure of working with Ketel Thorstenson for a few years now. Jess Weaver has been amazing walking us through our own personal taxes, giving us sound advice when buying a business, and tax preparation. He is top notch! Gretchen takes good care of us as well. We highly recommend KT to anyone looking for a CPA service!

We've been with Ketel Thorsenson since we opened our business several years ago and it was one of the best decisions we've made for our business. Greg Miner has been thorough, attentive and extremely responsive to every need we have throughout the year. I wouldn't trust anyone else with our business and personal taxes. Thanks Greg and the Ketel team for treating us so well!

We have been using Ketel Thorstenson for a number of years for our personal and business accounting needs. Greg Miner has been absolutely wonderful to work with. He is extremely thorough in the work he does and is always there to answer our accounting questions. If you are in search of an accounting firm that is thorough, knowledgeable, and dedicated to exceptional customer service, Ketel Thorstenson is the perfect fit!

When we switched accountants quite a few years back we never thought it would be so easy and effortless... with Ketel Thorstenson, it was just that! Greg Miner has been taking care of us in both our business and personal taxes. Always there to offer advise and answer questions. We've always felt like we are been taken care of and treated like VIPs! Thank you Greg and Ketel Thorstenson for your excellent service - I always recommend you guys to my friends!

Greg Miner and Ketel Thorstenson have been our trusted tax preparers since the foundation of our small business. Greg, in particular, stands out as a true professional who consistently delivers excellent service. His attention to detail and thoroughness in handling our tax matters is commendable. One of the qualities we appreciate most about Greg is his promptness in responding to our inquiries. He understands the importance of timely communication, and we have always received quick and accurate responses

I trust Ketel Thorstenson with my personal and business taxes. I work with Greg, one of the partners of the firm, and he is always available to answer my questions and walk me through any strange loopholes that keep my money safe. I have every confidence that the firm does the best work available at a reasonable rate. You will not regret their expertise and the peace of mind it brings!

Amazing accountant firm, highly recommend. I wouldn?t use anyone else. Very thorough and helpful with all of my accounting needs. I have worked with Greg Minor for many years. He is always going above and beyond to help my business. Thankful to have someone like Greg who's always looking out for our best interests.

The number one reason for continuing business with Ketel Thorstenson accounting firm is their personalized customer relations. Of the many clients they have, they make us feel like we are the only ones, with e-mails or calls to discuss what is in the best interest for our business and personal needs. We fully trust Ketel Thorstenson with our tax needs and take their advice on making changes to our personal and business operations.

We have used Jess at Ketel Throstenson in Spearfish for our business and personal tax/accountant needs for the last 5 years or more! He is wonderful to work with and makes tax season a breeze. They also have great quickbook specialist to work with too! 10/10 recommend!

Jess Weaver is highly credible, ethical, thorough and very knowledgeable in his field. He works hard to provide ongoing solutions to our tax needs. Since moving our business to him, he has saved us substantial tax dollars by finding qualified deductions and alternatives. We feel blessed to have him on our team. In addition, his support staff is professional, friendly and highly responsive. Ken and Krista Barker

I have worked with Ketel Thorstenson for the last 10 years and they have done an excellent job taking care of my accounting needs and the occasional, "I need this today," requests. They have an exceptional team and they've always treated me and our mutual clients as a priority. I highly recommend them.

I have worked with Greg Minor at Ketel Thorstenson over the past 5 years and he has always done a very good job helping me manage and mitigate all my tax liabilities. I have worked with a few different accounting firms over my 40 year in business and this firm with the help of Greg are ranked at the very top. John Tollison

Hiring KTLLP was one of the best decisions we've made as a business. Greg Miner is always attentive to our needs no matter the time of year. They are quick to respond to any questions, and have handled our complex accounting needs without any issues since starting to work with them. Hiring them has also been a positive ROI for after we factor in the savings between tax and financial planning. Choosing KTLLP has been a slam dunk for us as a business. If you are on the fence, do your business a favor and give

I was an attorney and retired after 42 years of practice in the Belle Fourche and northern Black Hills area. My wife Cathy and I were married just 6 years ago. Cathy is a very active real estate broker and investor. We keep our business interests separate. Therefore our tax preparation and business planning presents a challenging scenario. Jess Weaver of Spearfish has been of excellent assistance in helping us accomplish our goals. Clients in my law practice sometimes required skilled business valuation and

I cannot say enough about Jess Weaver and his professional knowledge as an accountant. Always accurate, very good communication, he is well versed in various aspects of IRS code that relate to our small business. He is excellent to work with!

I?ve been an entrepreneur for nearly 50 years - many entities, many complexities. In all that time I have never had the high level of dedication, preparation and representation from any accountancy firm I?ve used before moving to K-T several years ago. I can?t convey how pleased I?ve been SINCE making the move! They are extremely pleasant and professional, as well as helpful. And unlike most businesses today, they have plenty of well-trained staff, so a call or email is always returned promptly. They are th

Ketel Thorstenson has handled my business tax returns the last few years. They have done a great job and been very easy to work with.

Professional, thorough, excellent accounting firm. Greg M has been an invaluable advisor whom I trust with my personal and business financial information

Certainly enjoyed working with Greg at KT in Spearfish. Very glad he took us as clients. Very smart man and very professional!

From our yearly tax planning and prep to special inquiries from the IRS, Greg and the team at KT have been a huge help with our finances! Thank you!

Greg & Carol are the best! Always looking out for our business. Greg is personable and professional. Highly recommend.

Wouldn't even take us on as clients. Simple 1099 and W2 return but I guess that was just too complicated. ETA: Guess that's not your fault either.

Been working with Greg for a long time now - highly recommended!

Frequently Asked Questions

What qualifications should I look for in a CPA?

Look for a Certified Public Accountant (CPA) license, which ensures they’ve passed rigorous exams and meet state requirements. Check for relevant experience in your industry, additional certifications like CFA or CMA, and membership in professional organizations like the AICPA. Verify their credentials through state licensing boards.

How do I find a CPA in my area?

Use online directories like the AICPA, CPAverify, or state CPA societies. Search platforms like Yelp or Google for local CPAs with reviews. Ask for referrals from business associates, friends, or financial advisors. Local chambers of commerce can also provide recommendations.

What’s the difference between a CPA and an accountant?

A CPA is a licensed professional who has passed the CPA exam and met state requirements for education and experience. An accountant may lack this certification and could have varying levels of expertise. For complex tasks like tax audits or financial reporting, a CPA is typically more qualified.

How do I know if a CPA specializes in my needs?

Ask about their experience with your specific financial needs, such as tax preparation, small business accounting, or estate planning. Review their website or LinkedIn for case studies or client testimonials. Inquire about their client base to ensure they handle similar financial situations.

Should I check a CPA’s reviews before hiring?

Yes, reviews provide insight into a CPA’s reliability, communication, and performance. Check platforms like Google, Yelp, or the Better Business Bureau for client feedback. Look for patterns in reviews, but verify their authenticity, as some may be biased or outdated.

How can I verify a CPA’s license?

Visit your state’s Board of Accountancy website or use CPAverify.org to check a CPA’s license status. Confirm their license is active and check for any disciplinary actions or complaints. This ensures they’re in good standing and meet professional standards.

What questions should I ask during a CPA consultation?

Ask about their experience with your financial needs, fee structure, availability, and communication style. Inquire how they handle tax filings, audits, or financial planning. Ask for references or examples of similar work to assess their expertise and fit.

How much should I expect to pay for a CPA’s services?

Fees vary based on location, services, and complexity. Basic tax preparation may cost $150-$500, while business accounting or audits can range from $1,000 to $10,000+. Request a detailed fee structure upfront and compare quotes from multiple CPAs.

Can I work with a CPA remotely?

Yes, many CPAs offer remote services through secure online platforms for document sharing and virtual consultations. Ensure they use encrypted tools for data security. Remote CPAs can be effective if they understand your local tax laws or business regulations.

How do I assess a CPA’s communication skills?

During consultations, evaluate their ability to explain complex financial concepts clearly. Ask sample questions about taxes or financial strategies and note their responsiveness and clarity. Good communication ensures you understand their advice and fosters a productive relationship.

What red flags should I watch for when screening a CPA?

Beware of CPAs who guarantee specific tax refunds, lack a valid license, or have disciplinary actions on record. Avoid those with poor communication, vague fee structures, or negative reviews highlighting unethical behavior. Always verify their credentials independently.

Should I choose a CPA from a large firm or a solo practitioner?

Large firms offer more resources and specialized teams but may charge higher fees. Solo practitioners often provide personalized service and lower costs but may have limited availability. Choose based on your needs, budget, and preference for personalized attention.

How often should I meet with my CPA?

For individuals, annual meetings for tax preparation may suffice. Businesses may need quarterly or monthly check-ins for bookkeeping, tax planning, or financial reporting. Discuss your needs upfront to establish a meeting schedule that aligns with your financial goals.

Can a CPA help with both personal and business finances?

Yes, many CPAs handle both, but confirm their expertise in both areas. Ask about their experience managing personal taxes and business accounting simultaneously. Ensure they can balance both without compromising attention to your specific financial needs.

What should I do if I’m not satisfied with my CPA?

Discuss concerns directly with your CPA to resolve issues. If unresolved, check your contract for termination terms. Seek a new CPA by researching reviews, credentials, and referrals. Request your financial records to ensure a smooth transition to a new professional.

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