Stephan P. McMahon & Companyis a progressive and innovative firm committed to strategic knowledge development and its transfer to our clients to foster and optimize their success. What does success mean to you?

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  • It has been wonderful to develop a real business partnership between our two companies. I truly appreciated everything your firm has done for my business, and I will and have wholeheartedly recommend anyone who asks me to SPM&CO.

    Gail O’Rourke, President – White Wood Kitchens

  • Thank you for your great support! We appreciate your special attention to our “urgent” needs prior to and after leaving for Sierra Leone.

    Allen Morell – New Covenant Foundation, Inc.

  • It is great to know that we can reach out to you when needed. Thank you! We so appreciated how quickly you respond to help us and how committed you always seem to our family.

    John & Pam Domos – Domos Carpentry

  • Thank you for your support! Your donation helped make our event a huge success!

    Kelvin & Amy Ing – Cape Cod Challenger Club

  • Thank you so much for taking the time to meet with us yesterday. Figuring out our withholdings together was very reassuring. Paul and I are so happy you are our accountant. You are very smart, capable, and personable too! We are in good hands!

    Leslie Chizek

  • You were so patient and kind to me yesterday that I wanted to say thank you again. I just wanted to let you know how pleased and relieved I was after our meeting!

    Nancy Cutting Coveney

  • Amazing accountant! Extremely knowledgeable and professional. I recommend Stephan to anyone looking for a great accountant.

    Natalia Wiener – Old Cape Sotheby’s International Realty

  • Thank you for your support of Nauset Disposal’s 2017 Trash Bash. On behalf of our staff, volunteers, and beneficiaries, we wanted to extend a heartfelt thank you for your commitment to making this event so successful. Your partnership is important to us; thank you again for your continued involvement and support of Trash Bash.

    Shawn Delude & Kara Boule – Nauset Disposal

  • I admire your growth, stability and excellent reputation on the Cape. I'm very excited to be part of your team.

    Michael D. Pierce, Esq.

  • I am beyond impressed with the work done by Chris. He is an excellent communicator. I can tell SPM&Co is serious about helping their clients.Even though I may be a small client at this point you all treat me as if I am just as important as a large client.  You're true professionals and have taken a lot of stress off me by working so quickly and making sure everything is perfect. I am confident SPM&Co can handle anything that comes my way!

    Zachary Conley – HODL Inc.

We Provide Comprehensive Solutions

Who We Are

SPM & Co is a progressive and innovative firm committed to strategic knowledge development and its transfer to our clients to foster and optimize their success.

About Us

What We Do

SPM & Co offers a variety of services and strategies directed towards enhancing financial security, improving liquidity and achieving long term growth and profits.

All Services

Who We Serve

SPM & Co focuses on business consulting and valuations, tax planning for companies and individuals, in addition to a real passion for assisting startup ventures.

Contact Us

At SPM & Co, we partner with you to provide actionable insights and solutions that further your business goals. Here’s how we’ll succeed together.

We Go Beyond the Numbers

We live by the numbers so you don’t have to. We are adept at drilling down to the details to prepare cash flow analysis, accurate budgets, and identify opportunities for improvements in both process and profit. Do you know what your business is worth? We can tell you that too.

We Go Beyond the Numbers


You Save time on compliance


You Save time on compliance

You got into business to make a living doing something you love. So did we. Let us take compliance and administrative tasks off your hands. We handle new business formation, tax preparation, payroll and more. We can even help you with bank financing. Now get back to doing what you love.

It’s a partnership

The steady growth and sustainability of your business directly benefits you, your family and your employees. We believe it’s our job to develop new ideas that improve your financial security. We can identify strategic opportunities that get measurable results.

It’s a partnership


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