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Independently owned. Employee driven. Client focused.®

For over 45 years, Tonneson + Co has been helping clients like you thrive by offering expert accounting, tax, and advisory services. We pride ourselves in offering best-in-class service, backed by experience and a desire to see you succeed. Our team of experts can offer personalized service and meaningful relationships that larger firms can’t. That means we can provide hands-on guidance tailored specifically to your needs.

Whether you’re an individual, a privately-held business, or a nonprofit, our team is here to support you with trustworthy advice, timely communication, and up-to-the-minute industry knowledge.

Providing accounting, tax, and advisory services you can trust for over 45 years

Good relationships start with good values. Tonneson + Co supports our clients, our people, and our community by fostering a culture of inclusion, responsibility, and leadership.

Diversity, Equity & Inclusion

Diverse group of employees in a group smiling at the cameraBroader perspectives mean better decisions. We strive to create a safe environment for our staff while expanding that message to our professional networks, advisors, and client base. Our internal DEI Committee is dedicated to empowering staff and creating a welcoming environment for all.

Work + Life Balance

Everyone deservesMan sitting at desk with computer with his son on his back fulfillment—in and outside of work. Remote-work opportunities and flexible hours help attract top-level talent and allow us to engage a more diverse team.

Professional Development

Two employees looking at an tablet togetherOur people are our greatest asset. By providing a mentorship program, ongoing training, and an open-door policy, we create a clear path to career advancement and give our employees the tools they need to thrive. This keeps our retention rates high and supports long-lasting client relationships.

Women’s Leadership

Woman leader at Tonneson smiling at cameraWe believe in the diversity of perspective and experience, so it’s no surprise that 50% of our firm’s leadership, managing directors, and higher, are female. Tonneson + Co provides the flexibility, support, and opportunity that allow women to advance their careers.

Social Responsibility

Group of employees volunteering at a local non-profit We believe in making an impact, so we’re passionate about giving back to our communities. We support a number of charitable organizations and empower our people to serve meaningful local causes, building relationships and connections in the process.

Education & Training

Two employees in a training sessoin looking at the front of the room The tax and business landscape is complex. Offering top-notch service means keeping up with industry updates and trends while developing new skills that enhance performance. A robust new-hire onboarding and continuous staff training result in outstanding service for our clients.

News & Insights

Discover thought-leadership from our team of experts

A Quick and Easy Guide to Business Succession Planning

Business succession planning is a critical yet often overlooked aspect of running a successful company. Many business owners are so focused on day-to-day operations and immediate growth strategies. With such a focus, they neglect to plan for the future lea..
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