| name | t1k:foreign-owned-tax |
| description | US tax obligations for foreign-owned Delaware C-Corps — IRS Form 5472 ($25K/yr penalty if missed), EIN application via Form SS-4 for foreign applicants (no online process), W-8BEN per non-US shareholder, transfer pricing (IRC §482), state nexus (CA $757K threshold), 30% dividend withholding. Flags US-Vietnam no-treaty problem prominently. |
| keywords | ["form 5472","irs 5472","ss-4","ein","ein application","foreign applicant","w-8ben","w8ben","withholding tax","transfer pricing","irc 482","form 1120","foreign-owned delaware","foreign-owned llc","25 percent foreign ownership","fbar","firpta","cfc","pfic","beps","state nexus","california nexus","sales tax wayfair","us tax for foreign founders"] |
| argument-hint | [topic: ein | 5472 | w-8ben | transfer-pricing | state-nexus] |
| effort | medium |
| version | 0.3.2 |
| origin | theonekit-core |
| repository | The1Studio/theonekit-core |
| module | t1k-legal |
| protected | true |
Foreign-Owned US Corp Tax Obligations
Knowledge-base skill for US federal + state tax obligations of a Delaware C-Corporation with non-US-resident shareholders. Critical filing trap: Form 5472 penalty is $25,000 per year per missed filing with no income required to trigger it.
Skill Scope
IS: Form-by-form filing guidance, deadlines, penalty schedules, transfer-pricing principles, state nexus thresholds, withholding-tax mechanics.
IS NOT: Substitute for a US CPA experienced with foreign-owned entities. Final tax returns must be reviewed by licensed professionals. This skill provides analysis + checklists.
When to activate
| User asks about… | Primary reference |
|---|
| "Form 5472", "25% foreign-owned", "$25K penalty" | references/foreign-owned-tax-obligations.md § Form 5472 |
| "EIN application", "SS-4 form", "EIN for foreign founders" | references/foreign-owned-tax-obligations.md § EIN (SS-4) |
| "W-8BEN", "30% withholding", "Vietnamese shareholder tax" | references/foreign-owned-tax-obligations.md § W-8BEN + Withholding |
| "Transfer pricing", "intercompany services", "IRC 482" | references/foreign-owned-tax-obligations.md § Transfer Pricing |
| "California nexus", "state income tax", "Wayfair sales tax" | references/foreign-owned-tax-obligations.md § State Nexus |
| "FBAR", "FIRPTA", "CFC", "PFIC" | references/foreign-owned-tax-obligations.md § Edge cases |
⚠️ The 3 critical traps for foreign-owned Delaware corps
1. Form 5472 — $25K/year penalty per missed filing
Required when a US corporation has any 25%+ foreign shareholder OR engages in transactions with foreign related parties. Filed annually with Form 1120 (April 15).
- Penalty: $25,000 per year, per missed filing
- After IRS notice: additional $25,000 per 90-day period until compliance
- Information return only — no tax owed — but penalty applies even if filed late by one day
Action: confirm with US CPA that Form 5472 is on the filing checklist. Most foreign-owned entities miss this in year 1.
2. No US-Vietnam tax treaty
The single largest constraint for Vietnamese founders of US corps.
| Country pair | Dividend withholding | Source |
|---|
| US ↔ Vietnam | 30% — NO REDUCTION | No treaty exists |
| US ↔ UK | 15% (5% if 10%+ owner) | US-UK DTA |
| US ↔ India | 25% (15% reduced) | US-India DTA |
| US ↔ Singapore | 15% | US-Singapore DTA |
| HK ↔ Vietnam | 5-10% reduced | HK-Vietnam DTA ✓ |
Implication: distributions from US Delaware corp to Vietnamese shareholders face 30% withholding with no relief. Plan capital flow accordingly — consider whether profits should flow Vietnam → HK → US (using HK-Vietnam DTA) instead of direct distributions.
3. EIN application for foreign founders — no online process
The IRS online EIN application only works for US-resident applicants with a valid SSN/ITIN as the responsible party. Foreign founders must use:
| Method | Timeline | Notes |
|---|
| Phone (267-941-1099) | 4–5 business days | Most reliable; line open 6am–11pm ET, Mon–Fri |
| Fax to (855) 641-6935 | ~4 business days | Lower volume than phone |
| Mail to IRS Cincinnati office | 4–6 weeks | Slowest; use only if other methods unavailable |
| Third Party Designee (TPD) | Same as above | TPD with US ITIN can apply on your behalf |
Common services like Firstbase and Stripe Atlas include EIN application as part of their bundle (often using TPD method).
Quick reference — filing schedule
| Form | What | When | Penalty for miss |
|---|
| SS-4 | EIN application | After incorporation (no fixed deadline, but needed for banking) | None per se — blocks operations |
| Form 1120 | US corporate income tax | April 15 (or 6-month extension via Form 7004) | $210/month per shareholder (small corp); larger penalties for larger |
| Form 5472 | Foreign-owned reporting | With Form 1120 (April 15) | $25,000/year per filing |
| W-8BEN | Per non-US shareholder | Before first distribution; renew every 3 years | 30% backup withholding on distributions |
| State income tax | Per nexus state | Varies (CA: April 15, FY-based) | State-specific |
| Sales tax registration | Per nexus state | Within 30 days of triggering nexus | State-specific |
Action items (first 90 days)
- EIN via SS-4 phone line — call (267-941-1099) within first week post-incorporation
- Engage US CPA experienced with foreign-owned entities — costs $2K–3.5K/year for return + 5472
- W-8BEN for all 5 non-US shareholders — collect before any distribution
- Draft intercompany services agreement — for any cross-entity transactions (PlayableLabs ↔ ByteonLab VN, ↔ HK entity). Documents transfer-pricing position.
- Monitor CA nexus thresholds — $757,749 in CA sales (2025) triggers franchise tax + income tax filing
- FinCEN BOI report — within 30 days of incorporation (2024+ rule)
Companion skills
t1k-delaware-incorporation — DGCL, Cert of Inc, franchise taxt1k-us-business-banking — Mercury/Stripe activation depends on EINt1k-cap-table-admin — 83(b) elections (30-day strict deadline; affects shareholder tax)t1k-hk-corp — HK-Vietnam treaty + offshore claim mechanics
See also
