Strategic U.S. tax planning and compliance services for European and international companies.

Simplify Your U.S. Corporate Tax

From choosing the right entity to filing federal and multistate returns, we make U.S. tax compliance straightforward for international companies. Our advisors coordinate cross-border filings, optimize structures, and plan ahead to keep your business efficient and audit-ready year-round.

U.S. federal and state tax filing compliance for foreign entities.

U.S. Federal & Multistate Returns

We handle every level of corporate filing - federal, state, and local - ensuring your U.S. operations remain compliant no matter how many states you operate in. Our team manages deadlines, filings, and notices directly with the IRS and state authorities, giving you confidence that your compliance is always current and complete.

Cross-Border Structuring & Setup

Selecting the right structure - LLC, C-Corp, subsidiary, or branch - has long-term implications for taxation, liability, and growth. We help you model scenarios, navigate ownership restrictions, and set up an entity that aligns with both your U.S. ambitions and your home-country framework.

cross-border entity structures including LLC, C-Corp, and subsidiaries.
International tax planning involving treaty benefits and double taxation mitigation.

International Tax Planning

Operating across borders means balancing competing tax systems. We coordinate with your foreign accountants to structure intercompany flows, apply treaty benefits, and mitigate double taxation risks. The result: efficient tax positioning that supports your U.S. strategy and global profitability.

Frequently asked questions

U.S. corporate 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 businesses.

What are the main taxes a US company must pay?

A US company typically pays taxes at three levels: Federal Income Tax (IRS), State Income Tax (varies by state), and Sales Tax (collected from customers). Unlike in Europe, there is no federal VAT; instead, Sales Tax is managed at the state/local level. You may also owe Payroll Taxes if you have employees.

Do I need a "Fiscal Representative" in the US?

No. The US does not use the concept of a government-appointed "fiscal representative" for tax payments. Instead, you must have a Registered Agent in your state of incorporation to receive legal documents, and you appoint a US accounting firm (like Orbiss) to prepare and sign your tax returns.

What is the current US corporate tax rate?

The Federal corporate income tax rate is a flat 21% on taxable income. However, you may also owe State corporate tax (varying from 0% to over 9%) depending on where you have "nexus" (economic or physical presence).

What is Form 5472 and what happens if I forget to file it?

Form 5472 is an informational return filed with the IRS by US corporations with at least 25% foreign ownership. Why it matters: The penalty for failing to file - or filing incorrectly - is $25,000 per missing form, even if your company had no profit.

What is "Sales Tax Nexus" and does it apply to SaaS?

"Nexus" forces you to collect sales tax in a specific state. Most states now enforce Economic Nexus (e.g., selling over $100k revenue or 200 transactions), meaning you must collect tax even without an office there.

When are estimated tax payments due?

If your corporation expects to owe tax of $500 or more, you must make estimated tax payments to the IRS in four installments: April 15, June 15, September 15, and December 15.

What is the Delaware Franchise Tax?

Even if you don't operate in Delaware, all Delaware corporations must pay an annual Franchise Tax to maintain good standing. The deadline is strictly March 1st. Failure to pay blocks you from closing deals or raising funds.

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.
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