International tax services for global founders and professionals moving to the U.S.

Cross-border Life, made easy

For founders, executives, and global mobility programs, we make complex U.S. tax filings simple and strategic. Our specialists handle every detail - from residency status and treaty positions to expat filings - so you can stay compliant while minimizing your global tax exposure.

U.S. expat tax returns and 1040-NR nonresident filing services for international professionals.

U.S. Expat & Nonresident Filings

Whether you hold a visa, Green Card, or split-year status, we ensure your filings accurately reflect your U.S. presence. Our international team manages complex forms, like Foreign Tax Credit and dual-status returns, addressing income sourcing, credits, and treaty exemptions with precision. 

Global mobility and international assignment planning for employees and executives moving to the U.S

Global Mobility
& Assignment Planning

We support companies and individuals through every stage of global mobility - structuring compensation, tracking residency, and coordinating payroll - so relocations and temporary assignments run smoothly and without compliance surprises.

Global Mobility
And Assignment Planning

We support companies and individuals through every stage of global mobility - structuring compensation, tracking residency, and coordinating payroll - so relocations and temporary assignments run smoothly and without compliance surprises.

Global mobility and international assignment planning for employees and executives moving to the U.S
U.S. tax treaty optimization to prevent double taxation and reduce withholding for international business owners.

Treaty-Based Tax Optimization 

U.S. tax treaties can significantly reduce withholding and prevent double taxation - but only if properly applied. We analyze your home-country treaty, identify applicable articles, and structure your reporting to secure the full benefits available under international agreements.

Frequently asked questions

U.S. individual tax rules can be surprisingly different - especially if you’re used to another system. This FAQ covers the essentials we’re most often asked by international founders, executives, and globally mobile individuals.

If I own a US business but live abroad, do I owe US taxes?

Generally, no. If you are a non-resident alien and simply own shares in a C-Corp, you are not taxed in the US unless you receive dividends or perform work physically within the US.

How does the US income tax system work?

The US uses a progressive tax bracket system. For 2025, federal rates range from 10% to 37%. However, most states also charge a separate state income tax (e.g., California up to 14.4%), so your location matters heavily.

Which visa is right for me: E-2 or L-1?

The L-1A is for transferring managers/executives from a foreign parent to a US branch. The E-2 is an "investor visa" for nationals of treaty countries who invest substantial capital in a US business. Both require a solid business plan.

When do I become a US tax resident?

You become a resident if you meet the Substantial Presence Test: 31 days in the current year + a weighted total of 183 days over 3 years. Residents are taxed on worldwide income.

What is the FBAR and do I need to file it?

FBAR is mandatory if you are a US tax resident and your aggregate foreign accounts exceed $10,000 at any time during the year. Penalties for non-filing can start at $10,000.

How much income can I exclude if I move abroad (FEIE)?

For 2025, qualifying US citizens/residents living abroad can exclude up to $130,000 of foreign-earned income from US federal tax.

Does my home country's Tax Treaty prevent double taxation?

Yes, generally. Most tax treaties (like those with the UK, France, or Germany) provide mechanisms to ensure you aren't taxed twice on the same income. However, you must file specific forms (like Form 8833) to claim these benefits.

Does moving states change my taxes?

Yes. Moving from a high-tax state (NY/CA) to a no-tax state (FL/TX) can save money, but you must genuinely move your "domicile." States aggressively audit people who claim to move but keep ties to their old state.

Ready to Get Started?

Whether you’re launching in the U.S. or expanding an existing entity, our team can help you navigate every financial, tax, and compliance step with precision.

Our cross-border experts will review your needs, outline your best options, and help you chart the most efficient path to growth in the U.S. market.
Contact Orbiss for expert U.S. tax and expansion consulting services for international SMEs

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