Peterson Sullivan is one of the premier accounting and advisory firms in Seattle, and one of the Northwest’s top 10 CPA firms.

For more than 60 years, companies across Seattle, Bellevue, Everett, and Tacoma have relied on us to provide proactive financial insight, thoughtful business advice, and cutting-edge technical expertise to keep their enterprises financially fit, compliant, and prepared for new opportunities.

We provide a comprehensive array of services including traditional accounting and audit, tax planning and compliance, succession planning, estate planning, valuations and litigation support, and general business services. Our professionals understand the challenges that executives, CFOs, and controllers face when managing an enterprise. Whether you’re an entrepreneur, small to mid-size business owner, public company executive or high net worth individual… we have the right solutions for you.