What do you need your CPA Firm to be?


Qualified professionals with the experience to advise you strategically


Communicating with you at the speed of today’s business world


Nuanced and proactive planning to help you achieve maximum tax efficiency


Bringing needed expertise to smaller clients with complex concerns


Combining accounting, tax, & advisory services for a holistic approach


Building strong relationships with our clients to better understand their needs

How can we help YOU?

I am a…

Small Business Owner

We know that small business owners want and need guidance.  You don’t have a tax director or CFO in-house, so you rely on your professional advisors to help you “know what you don’t know”.  Through our signature small business advisory services and holistic approach throughout the year, we will help you feel confident and empowered in this often-intimidating area, supporting you as you achieve your business goals.

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I am a…

CFO / Tax Director

Our advanced technical skill makes us uniquely equipped to help mid-sized businesses, either as a full service provider or as a complement to to your larger audit or tax firm.  We can help reduce your costs and alleviate pressure on internal finance resources for greater operational efficiency.

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I am a…

Individual Taxpayer

Taxes impact every single American, yet somehow almost no one understands how it actually works.  Most people walk around trying to make day-to-day financial decisions for themselves and their family with this enormous blind spot!  We are nationally-recognized as a pioneer in the space of individual tax planning and advisory.  Our unique process and holistic approach allows clients to feel confident they are achieving tax efficiency that is aligned with their personal goals and priorities and prepared for tax season when it comes.  We leverage the very best in technology with our signature personal touch to give our clients peace of mind and fewer headaches.

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I am a…

CPA / CPA Firm

We are extremely proud of the unique relationships we have developed with small and large firms alike.  Our unique specialty areas (such as international tax and IRS controversy) give us the ability to consult and accept referrals in areas that many practitioners want to avoid.   We respect our referral partners and strive for relationships that are beneficial for everyone.

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Happy Clients

What We Do

Diverse services for a complex world.

Who We Are

Learn about our roots and what makes us special.


Tax Returns Filed



How We Do It

A unique approach founded on relationships.

Talk To Us

Contact our firm to learn more.


Dedicated Team

Who Do We Work With?

Just a few of the industries we have served...
  • As a small business working within and outside of the US, Lanphier has been the perfect match for us. Since our business is 24 hours, they have always been responsive when I have an urgent question after hours. They have spent extra time when I need further explanation and are always very detailed and thorough in responding to my questions.

    Mandy Rosello

  • I have been a client of Lanphier LLP for around six years. I am a small business owner, and Brittany, Chris, Dennis, and team have all been reliable, responsive, and accommodating for all of my personal and professional accounting needs. Unlike so many other small business owners I know, I do not stress about the finance management. I completely trust Lanphier LLP, and appreciate their stewardship and direction (especially post-COVID).

    Cara Cartee

  • We could not be more grateful for Brittany and her team. We have been with them for many years and have never been disappointed by their progressive knowledge in small business accounting, including the most recent adjustments and learning curves due to COVID-19. As two small business owners, my husband and I have always felt like we are in great hands!

    Julie Gladnick

  • While I don't have the most complicated tax situation, it's not exactly simple, and working with Lanphier over the past two years has made life so much easier. I would recommend Brittany, Dennis, and their team to anyone. Thanks guys!

    Adam Hostetter

  • We have worked with this firm for several years. They have always been the most professional, knowledgeable, and responsive firm I have known in my 30 years in business. They are an amazing resource. There are never any excuses. They just deliver. I recommend them highly.

    Brian Peters, MD

  • Everyone was Lanphier LLP is highly responsive and patient. I appreciate how they take the time to explain when I have questions. Highly professional.

    Jana Axline

  • Lanphier LLP has, by far, the best accountants I have worked with as a business owner.  The quality and expertise of their work is top-notch, and most importantly, they are extremely responsive to our needs.

    Don Golden

    President — Precision Sample LLC

  • I have been working with Brittany and Dennis for over six years.  Their accounting and legal practices, working together, have provided me and my companies with quality care and advice since day one.  You will not find a more honest and ethical team of professionals to assist you with accounting and legal advice.  Thanks for all you have done for me and I look forward to many more years working with you both.  

    Toby Terhune

    President — Shadow Creek Homes, LLC

  • We have personally worked with the Lanphiers for more than 7+ years and Brittany, Dennis, and the entire Lanphier team have been an absolute pleasure to work with.  We could not have built our various internet companies without their expertise and diligence on our accounting, bookkeeping, and tax planning.

    Matt Frary

    CEO/Founder — SmarterChaos.com LLC

  • What a great resource to have the Lanphiers' international tax expertise to help me get it right for my clients and give me peace of mind.  A huge "thank you" to Brittany and Dennis for helping me deliver outstanding service to my clients and for your willingness to work "round the clock" to make it happen.

    Rob Eggett, CPA

    CPA Firm Owner

Contact Us Today!

Lanphier LLP

2000 S. Colorado Blvd., Tower 1, Suite 10800

Denver, CO 80222



Firm CPA License No: CO 13111