CPA Firm Co

Lanphier LLP (operating as CPA Firm Co) is a Denver-based CPA firm founded as a husband-and-wife team and now serving over five hundred clients. The firm combines big-firm technical expertise with small-firm relationship focus, offering comprehensive tax preparation and consulting, full-service bookkeeping through financial statement preparation, strategic tax advisory and planning, and business advisory services. Core competencies include individual tax planning and advisory, small business accounting and advisory, mid-sized business support complementing larger audit/tax firms, international tax services for US citizens abroad and foreign nationals, and IRS controversy representation. The firm serves diverse industries including construction, real-estate development, venture capital, startups, web marketing, professional services, health services, and law firms. Lanphier LLP is a proud partner of the Denver Broncos small business initiative and maintains deep local roots while offering national and international reach. The firm is known for responsiveness, hands-on service quality, and strategic proactive planning. Multiple client testimonials highlight professional knowledge, responsiveness, patience in explaining complex concepts, and long-term partnership value.