Castellon Professional Services

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48 Gold St Ste 200
San Francisco, CA 94133
+1 (415) 655-6626
http://www.mcastellon.com

Castellon Professional Services is a highly experienced and knowledgeable certified public accounting firm based in San Francisco, CA. They offer a comprehensive range of tax management services, debt and finance advising, IRS representation, estate and trust planning, international taxation, and cost segregation services to individuals and businesses. With a proactive approach and personalized financial guidance, their mission is to help clients maintain financial viability in the present while achieving their future goals.

Led by Frank Mario Castellon, a seasoned tax consultant with extensive experience in various industries, including Life Sciences, Hi-Tech, and manufacturing, the firm provides expert evaluation, consultation, and preparation on tax issues. Their team of professionals is dedicated to assisting clients in making informed decisions, implementing effective tax strategies, and ensuring compliance with tax laws.

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5.08 reviews
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Robert C.
8/20/2020

After I fired my previous CPA for WAY overcharging me, I reached out to Mario to help me with my taxes. Mario and his team are fast, efficient, and responsive. I uploaded a lot of tax paperwork...

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Beth C.
1/11/2024

Mario and his team are super insightful and have been incredible financial advisors and partners for my scaling brand consultancy. They are who you want in your corner when it comes to financial...

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Lucas C.
4/14/2020

Mario has been super helpful! I needed another pair of eyes on my self-prepared return which included some RSU-related complexity and a K1 schedule. Mario's assistant scheduled a free...

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Tala I.
3/1/2020

I have referred a few people since my time with Mario and we are now going on about 5 years together! I can't believe it as I am writing this and wondering why I haven't reviewed him sooner!!!...

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Chaz P.
9/1/2020

I sent an inquiry to Mario a week ago to discuss my tax liability for 2020. He responded quickly with his rates, but also offered a virtual consultation to provide me with a ballpark estimate for...

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