Looking for sound US tax advice from someone who understands where you come from?
Companies and individuals based outside the US who owe US tax, or face US tax law for other reasons, often have a hard time. These international clients rarely find a US tax expert who can see beyond domestic law.
Since 2008, Sebastian and Mount Bonnell Advisors have advised international clients on every US tax matter, for companies and individuals alike.
Are you, as an individual or a company, subject to limited or full tax liability in the US? Or could that happen in the future through US income, a move, an inheritance or forming a company? There are plenty of reasons US tax questions come up that you want to settle with a US tax expert.
Sebastian has the expertise and the experience to advise you on your plans.
Specifically, Sebastian and Mount Bonnell Advisors can help you with:
No need to fear the IRS
Whether you live in the US or owe US tax (now or soon) for another reason, say as a US citizen living abroad, a green card holder, someone living in the US on a visa, or someone with US-taxable income: we are your go-to partner for every tax question.
Keeping track in the dense jungle of IRS forms, documents and filings isn't always easy. Agencies, a foreign language and a range of filing deadlines don't make it any simpler. That's when an experienced partner pays off.
Clarity when things get complicated
You get valuable insight from an expert who has handled US taxes for a great many clients and can help you find the right answer. Taxpayers often can't see the forest for the trees, which makes a sound decision impossible. Sebastian knows what matters and gives you a clear overview of every key factor behind a well-informed decision.
Why you should book a session with Sebastian
Mount Bonnell Advisors is your English-speaking contact in Austin, Texas for US taxes, US company formation and US visas. Sebastian himself lived in the USA for almost 10 years.
Since 2008 he has taken a wide range of European companies into the USA, and kept many others from making serious mistakes.
Because the right US plan has to be tailored to each client. As an experienced US expert, Sebastian will analyze your current situation and help you make your decision.
Sebastian has worked with companies of every size, including some that people would wrongly have considered "too small" to, say, expand into the USA.
You get expert answers to your questions and a solid basis for planning, so you are in the best position to make the right decisions for your business.
Every year Sebastian advises dozens of European business people on their way to the USA, and brings deep knowledge in these areas…
5 easy steps to your consultation
When you book, you pick the slot in Sebastian's calendar that suits you best. You then receive an order confirmation by email.
Anti-money-laundering laws require us to verify your identity. Simply reply to the order confirmation with a photo or scan of your ID.
Sebastian's assistant will email you the dial-in details for your preferred platform (Zoom etc.).
The consultation costs $850. The call lasts up to one hour.
Preparing well for the call is essential. You have a full hour with us, but you need to use it effectively. The best approach is to write down your questions in advance.
Why isn't the consultation free?
Sebastian's time is too limited to justify free consultations and the extra work they create.
A free consultation is usually just a sales pitch with no real value, designed to land a contract.
A paid consultation with Sebastian is fundamentally different. You can count on reliable information and concrete recommendations. Every consultation gives you practical advice and precise detail, so you know exactly which strategy is best for your US plans.
We even back this with a satisfaction guarantee!
100% satisfaction guarantee
Our clients' satisfaction comes first. If you are not 100% satisfied within the first 15 minutes of the consultation, you can cancel the booking entirely.
In that case, any fees already paid are refunded in full. After the first 15 minutes, all agreed fees are binding.
Good decisions rest on reliable information. Book a session with Sebastian today for expert, forward-looking advice that gives you the certainty and confidence your US plans need!
Book now... here's what to expect
In our consultation you can count on honest advice and straight feedback. If Sebastian thinks your US plans won't work or aren't the right decision for your business, he will tell you so, honestly!
With more than 15 years in the field and hundreds of international clients, Sebastian has a realistic sense of what you can expect from your US plans and which alternatives may be open to you.
Over his career, Sebastian Sauerborn has helped countless clients succeed in the US, guiding them from A to Z through booms and deep recessions alike.
That wealth of experience underpins his deep understanding. Sebastian has a large personal network of US attorneys, investors, entrepreneurs, politicians and people in the arts. We bring these contacts in for clients as needed, to give you and your business the best possible start in the USA.
For example, we have helped clients secure government funding in the US or find a US investor. We have helped others make the most of little-known exceptions in various US visa categories. During the COVID pandemic, for instance, some clients obtained a US investor visa with extremely little capital.
This kind of detailed knowledge only comes from practice, and it lets Sebastian set the right course for you and your business in the USA. Book your session now! Especially in times of crisis like the one Europe is going through, the USA is an attractive alternative and a solid Plan B. You too have a very good chance of succeeding in the USA. Get advice and get certainty.
Consultations take place
Frequently asked questions (FAQs)
The consultation is not a paid sales pitch. Quite the opposite. We give you thorough advice, whether or not you go on to engage us after the consultation.
We ask all clients to prepare for the consultation in advance so your time is used as efficiently as possible. It helps to write down every question you want answered during the consultation.
The consultation usually takes place within a week of booking. If you would prefer an earlier date, we will do our best to schedule it as soon as possible.




