Trusted CPA and Business Advisors
Laying the Foundation for


Trusted CPA and Business Advisors Laying the Foundation for YOUR SUCCESS


A CPA Firm that Partners With Its Clients

We are a CPA firm that specializes in accounting and business advising services for small businesses, as well as tax planning and compliance services for both individuals and business entities.

Aspen Advising & CPAs understands that each client has different needs. We highly value long-lasting relationships with our clients and thus spend dedicated time getting to know you and your business. As a result of our years of experience as a qualified CPA in the Denver metro area, where we have served various industries, we have the ability to customize our services to your specific needs. Call us today at 303-984-6198 to schedule a consultation. We look forward to hearing from you!

financial advisor denver

Business Advising

  • Strategic Planning
  • Budgets and Forecasts
  • Cash Flow Management and Projections
  • Key Performance Indicators/Benchmarking
  • Buying or Selling a Business
  • Succession Planning
  • Retirement Planning
tax preparation

Tax Preparation

  • Tax Compliance & Planning
  • Tax Consulting and Projections
  • Tax Minimization - Individuals & Businesses
  • Choice of Entity Selection
  • State & Local Tax Services
  • IRS Resolution and Representation

Accounting Services

  • Accounting Software Consulting
  • On-site or Remote CFO Services
  • On-site or Remote Support of Accounting Systems
  • Bookkeeping and Payroll Services
  • QuickBooks Support
  • Financial Statement Consulting
  • Sales Tax Compliance and Consulting
  • Property Tax Return Preparation


"I had happily worked with Mark Smith and Aspen Advising for several years so when I opened Mountain State Financial Group in March of 2015 I knew they would be my personal AND business accounting advisors. Mark and his team have always worked diligently with me as my company has expanded. They are a trusted advisor, always willing to promptly assist with any finance, tax, payroll, or other accounting service concerns I have. Aspen Advising’s professionalism, knowledge, prompt action, and 5 star service are just a few of the reasons I highly recommend working with this amazing firm." – Robert Hoff, CFA | President & Licensed Mortgage Broker
"I've been with Aspen Advising and Mark Smith for over 7 years and rely on their services for both my business and personal tax needs. Mark and his team are highly professional and responsive, and it gives me piece of mind to know I am in good hands." – Marco Rafanelli
"We have been clients of Mark Smith's for over twenty-five years. Mark has provided the highest level of service from the beginning of our professional relationship. He has taken the time to get to know not only our financial situation, but also our family's, which does nothing but make his services all the more effective and beneficial to our overall financial health. Mark is always available for questions, quick to offer suggestions to better our station, and extremely knowledgeable in his craft. We are very grateful for his continued assistance especially in these new and interesting times in the world market. We are very pleased with the level of service we have received." – Mandi Erichson
"We have had our personal taxes done by Aspen Advising for a few years now, and appreciate Mark taking the time to explain our tax return to us. Ours tends to be a little more complicated than most, and he has us understanding our tax return so that it all makes sense." – SF
"I have worked with Mark Smith and his team at Aspen Advising for several years. I have been very pleased with their quality of work and knowledge of taxes and accounting practices. I highly recommend them for business and personal tax return preparation as well as guidance with accounting issues throughout the year." – RS
"I couldn’t be more pleased to recommend Mark Smith and his staff at Aspen Advising & CPA. Mark is extremely knowledgeable in his field, professional and has been paramount in providing me with a better understanding of my business as it relates to taxes, accounting and strategic consulting. His office staff is professional, courteous and efficient and I have a true peace of mind working with this firm." – SR
"I’ve been a client of CPA Mark Smith for awhile now. He took over from my previous CPA and we were introduced to each other over a period of a couple years. Mark is extremely proficient, he is computerized, up-to-date, and goes to the latest seminars. He provides great information, especially in the recent episodes of things that are happening across our country. I can call Mark at any time and he gives me excellent, timely advice." – Joe Wise, RPh, Wise Pharmacy








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