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You dream the American Dream. We plan it with you, in plain English.

Whether you want to start a business in the USA, invest, move there or get your tax position properly organized, you need advisors who know both sides. Mount Bonnell Advisors is based in Austin, Texas, and is the US office of St Matthew, founded in London in 2006. Our team works across four countries, advising individuals and businesses in English in the UK, Ireland, Malta and the USA. Attorneys and accountants sit in our team, and independent US attorneys and accountants carry out the work that requires a licensed US professional.

Texas Proud · Memoir

The Oak I Once Wanted to Be Buried Under

"I don't sell tax savings. I help people prepare a decision like this so that it holds up."
Sebastian Sauerborn · 31 min read
Read the memoir →

A welcome from Managing Partner Sebastian Sauerborn

Sebastian Sauerborn explains why Mount Bonnell is based in Austin, how we work and what entrepreneurs can expect from a consultation on their US plans.

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About Sebastian

Meet the founder and Managing Partner: his path from London to the USA, his work with international entrepreneurs and the specialist sites that are part of the group today.

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Our fees

What our work in the USA costs and how our fees for consultations, tax work and ongoing support are structured.

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Work with us

How to become a client: from the first conversation and the engagement through to working together on US tax, company formation and administration.

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Client care

Who looks after you, how we organize our work together and how our team in Europe and the USA works on your case together.

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Partnership inquiry

Are you a lawyer or accountant looking for a reliable partner for the US side of a client matter? We have worked with colleagues across Europe for many years.

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Talk to us about your US plans

Want to talk through your US company formation, ongoing administration or tax questions with us? Book a consultation. We look at your specific situation and tell you which next step makes sense.

Book a consultation now Or request your free assessment