Nicolás Castillo

Nicolás Castillo, CPA has spent his 7+ year career to date working in US international tax and the past three years specializing in expat tax for Americans living abroad. During this time, he identified a passion for supporting small and large expat business owners and ambitious expat entrepreneurs who share a common problem: navigating US tax reporting obligations.

As an expat business owner living in Madrid, Nicolás empathizes with the dual issue of US tax reporting complexities and onerous and potentially expensive interactions with the IRS while also complying with local tax law. Expat business owners and entrepreneurs deserve a credible guide through the tax code that too often conflates an honest mistake with intentional failure to follow the rules.

Thus, Rook CPAs was born, a company dedicated to facilitating expat business operations and expat entrepreneurial activity for US expats worldwide, with a focus on Western Europe. Foreigners seeking to pursue business dreams in the US are also welcome aboard Rook CPAs’ ship, as Nicolás’ expertise spans the US expat/US inpat spectrum. With his background in international tax, Nicolás has also helped 100% of American-based companies expand into other countries.

Formerly employed by a large regional accounting firm and most recently a senior tax manager at a multiple award-winning expat tax service provider, Nicolás takes great pride in applying his knowledge of the US tax code in strategically beneficial ways for US expat and inpat business owners. As a first-generation American, Nicolás also understands that, sometimes, we’re called to build and create in a place different than where we’re from. But that shouldn’t be an obstacle to success, which is where Rook CPAs come in.