US Tax Compliance for Global Businesses — File Accurately, Stay IRS-Safe.
Norvex Assurance delivers end-to-end US federal and state tax compliance for foreign businesses, cross-border enterprises, and global entrepreneurs — from entity structuring and EIN registration through annual returns, transfer pricing, and IRS representation.
The US tax system combines federal corporate tax with state-level obligations that vary by jurisdiction — plus a web of international reporting requirements that catch most foreign companies off guard. For non-US businesses with US customers, US-source income, or US-registered entities, tax obligations begin the moment US nexus is established. Non-compliance is expensive. The IRS imposes significant penalties for unfiled returns, and international information return penalties reach $10,000–$50,000 per form per year. Foreign corporations operating without proper registrations face retroactive assessments with compounding interest.
Not sure if you need US Tax?
Talk to one of our experts — free, no obligation.
Your US tax requirements depend on your entity type and cross-border structure. Both services work together — compliance keeps you clean, advisory keeps your tax burden optimised.
US Entity Tax Returns & Reporting
What it evaluates
Federal corporate income tax returns (Form 1120/1120-F), state and local filings, international information returns (5471, 5472, 8865), and FBAR/FATCA compliance for US entities with foreign financial accounts.
Ideal for
Foreign companies with US C-Corp, LLC, or branch registrations, and US subsidiaries of multinational groups needing accurate, timely federal and state filings with full international disclosure.
Assurance value
Full IRS compliance, elimination of late-filing penalties, and a defensible filing position that protects your US operations from audit risk.
US Entry Structuring & Tax Planning
What it evaluates
US market entry structuring (C-Corp vs LLC vs branch), treaty analysis, permanent establishment risk assessment, transfer pricing policy design, and GILTI/Subpart F analysis for US shareholders of foreign corporations.
Ideal for
Foreign businesses entering the US market, multinationals with intercompany transactions requiring transfer pricing documentation, and global entrepreneurs seeking to minimise their effective US tax rate.
Assurance value
Proactive structuring that reduces your effective US tax rate and eliminates unexpected withholding taxes, GILTI inclusions, or Subpart F income before they become permanent.
Not sure which service fits your goals?
We review your existing US entity structure, prior filings, and cross-border arrangements — identifying your current obligations and any historical exposure to address.
We determine your federal and state filing obligations based on physical presence, economic nexus, payroll, and property — plus all required international information returns and FBAR/FATCA obligations.
Where prior returns are unfiled or require amendment, we implement the appropriate IRS resolution procedure to resolve historical exposure with the most favourable penalty outcome available.
We prepare your federal and state returns with complete supporting workpapers — reviewed at preparer, senior, and partner level before filing.
We prepare all required IRS international information returns, FBAR filings, and FATCA reporting alongside your main returns — ensuring complete, consistent disclosure.
We calculate quarterly federal and state estimated payment obligations, provide payment schedules, and monitor your income profile throughout the year.
When the IRS or a state authority issues a notice or audit inquiry, Norvex Assurance's licensed tax professionals respond and represent you directly.
Accurate, timely federal and state filings eliminate late-filing penalties and IRS audit triggers from inconsistent or incomplete returns.
Proactive structuring and treaty analysis can materially reduce your US tax burden before decisions become permanent.
FBAR, FATCA, Forms 5471 and 5472, and transfer pricing require specialist knowledge — our team eliminates the risk of missing IRS international reporting requirements.
Ongoing advisory modelling the tax impact of business decisions and structural changes before you commit.
If the IRS selects your return for examination, Norvex Assurance manages all correspondence and negotiations directly.
From first US LLC filing to complex multinational subsidiary structures — our services grow with your US presence.
These 6 service areas cover your complete US tax compliance obligations. Norvex Assurance handles every federal, state, and international filing requirement — so your US entity stays fully compliant with the IRS and all applicable state authorities.
Federal income tax returns for domestic and foreign corporations — including quarterly estimated tax calculations to avoid underpayment penalties.
Nexus determination across all 50 states based on physical presence, economic nexus, payroll, and property. Returns filed in every jurisdiction where nexus exists.
Required for US shareholders of foreign corporations, US entities with foreign transactions, and specified foreign financial assets. Penalties reach $10,000–$50,000 per form per year.
FBAR filings for US persons with foreign accounts exceeding $10,000. FATCA compliance advisory for entities and individuals with foreign financial assets.
Benchmarking studies, Master File/Local File documentation, and Country-by-Country reporting. Contemporaneous documentation provides penalty protection under IRC § 6662.
C-Corp, LLC, S-Corp, or branch analysis — considering treaty position, permanent establishment risk, and GILTI/Subpart F impact.
Everything required for accurate, compliant US tax filings — no hidden extras.
"We registered a Delaware C-Corp and started selling in the US without any tax advice. Two years later, Norvex Assurance discovered we'd missed Form 5472 filings for both years — $50,000 in potential penalties. They filed under Streamlined Procedures, resolved the exposure, restructured our intercompany arrangement, and now handle all our US compliance. The relief was immense."
Founder & CEO
UK SaaS Company — US Market Entry
"Expanding from Europe into the US meant navigating a completely different tax system under time pressure. Norvex Assurance structured our US entity, analyzed our treaty position, set up our transfer pricing policy, and filed our first US federal and state returns on time. Their cross-border expertise meant we never had to educate them on the European side of the equation."
CFO
European Fintech — US Expansion
"Managing a US subsidiary from Asia means the time difference alone makes IRS compliance a nightmare. Norvex Assurance handles every aspect of our US tax programme — federal, four state returns, international information returns, and quarterly estimates — with zero surprises. We receive our complete return packages weeks before the filing deadline, every year."
Director of Finance
Asian Tech Group — US Subsidiary