Subpart F Income: Currently Taxed CFC Income Categories Under §951
Subpart F Overview
IRC §951 requires US shareholders of CFCs to include certain CFC income currently.
Two main inclusion provisions for CFC US shareholders:
1. Subpart F income (§§952-954): specific categories of ‘tainted’ income. Current inclusion.
2. GILTI (§951A): non-Subpart F CFC tested income. Current inclusion.
Subpart F came first (1962). Targets income types that Congress identified as easily shifted to low-tax foreign jurisdictions.
GILTI added in TCJA (2018) as catch-all for remaining CFC income not subject to Subpart F.
Categories of Subpart F income (§952):
1. Insurance income (§953)
2. Foreign base company income (§954), which includes:
a. Foreign personal holding company income
b. Foreign base company sales income
c. Foreign base company services income
d. Foreign base company oil-related income (mostly eliminated by TCJA)
3. Income from countries supporting international terrorism (§952(a)(3))
4. Boycott-related income (§999)
5. Illegal bribes
For practical purposes, foreign base company income is the most commonly encountered category.
Foreign Personal Holding Company Income (FPHCI)
IRC §954(c) defines FPHCI — passive investment income earned by CFC.
FPHCI categories:
1. Dividends, interest, royalties, rents, annuities, and net gains from sale of property producing such income
2. Net gains from sale of property NOT producing income (most capital gains)
3. Net gains from commodities transactions
4. Net gains from foreign currency transactions
5. Income equivalent to interest (factoring, financing income)
6. Income from notional principal contracts (swaps)
7. Personal services contracts (related party services)
Why FPHCI is Subpart F: easily moved to low-tax foreign subsidiaries. Holding investments in foreign sub doesn’t justify lower tax than holding them onshore.
Common FPHCI scenarios:
1. CFC holds investment portfolio (stocks, bonds). Dividends, interest, capital gains are FPHCI.
2. CFC licenses intellectual property to foreign customers. Royalties are FPHCI (with exceptions for active business income).
3. CFC owns real estate in low-tax country. Rental income is FPHCI (with exceptions).
4. CFC makes loans to related parties. Interest income is FPHCI.
Active business exception: certain FPHCI types are excluded if from active business:
Active rents: rents from active leasing trade or business may be excluded. Active royalties: royalties from active licensing business may be excluded. These require substantial activity in CFC’s jurisdiction (employees, facilities, etc.).
Investment portfolio in CFC: typically all FPHCI; no active business exclusion. Subject to Subpart F.
US shareholder must include their share of CFC’s FPHCI in current income.
Foreign Base Company Sales Income (FBCSI)
IRC §954(d) covers Foreign Base Company Sales Income.
FBCSI: CFC’s income from purchase or sale of personal property where:
1. CFC purchases from related party (or sells to related party), AND
2. Property was not manufactured in CFC’s country, AND
3. Property is for use outside CFC’s country.
Designed to prevent: using foreign sub as middleman to shift profits to low-tax jurisdiction.
Example:
US parent manufactures products in US. Sells to Bermuda subsidiary (tax-free Bermuda).
Bermuda sub resells to European customers.
Bermuda sub’s profit on resale = FBCSI (related-party purchase, not manufactured locally, sold abroad).
Result: Bermuda sub’s profit currently taxable to US parent under Subpart F.
Limitation: the abuse Congress targeted. Without Subpart F, US could shelter $1M of profit in Bermuda permanently.
Exceptions:
Manufacturing exception: if CFC substantially transforms or manufactures the product, FBCSI doesn’t apply. CFC’s earnings are from genuine manufacturing, not just trading.
Substantial manufacturing test (Treas. Reg. §1.954-3): specific tests for what counts as manufacturing. Including 20% threshold for cost of goods sold attributable to CFC’s manufacturing.
Sales in CFC’s country: sales for use in CFC’s own country don’t trigger FBCSI.
Sales from same country: products manufactured in CFC’s country aren’t FBCSI.
Practical: legitimate manufacturing operations in low-tax jurisdictions generally avoid FBCSI.
Foreign Base Company Services Income (FBCSI)
IRC §954(e) covers Foreign Base Company Services Income.
FBCSI: CFC’s income from services performed for or on behalf of related party, outside CFC’s country.
Designed to prevent: routing service fees through low-tax jurisdiction.
Example:
US parent has consulting business. Establishes Bermuda subsidiary. Hires service personnel in Bermuda.
Bermuda sub performs services for US parent’s clients (in US or third countries).
Bermuda sub’s service fee = FBCSI (related party services performed outside CFC’s country).
Result: Bermuda sub’s service income currently taxable to US shareholder.
Service in CFC’s country exception: if services are performed in CFC’s country, not FBCSI.
Substantial business exception: similar to manufacturing — substantial activities in CFC’s country can avoid FBCSI.
Practical: Bermuda has very limited services workforce. Most service operations would naturally be in higher-tax jurisdictions where they avoid FBCSI.
High-Tax Exception
IRC §954(b)(4) high-tax exception:
If Subpart F income items are taxed at effective rate exceeding 90% of US corporate top rate (currently 21% × 90% = 18.9%), the income is excluded from Subpart F.
Applies on item-by-item or category basis depending on income type.
Examples:
CFC in France with 25% effective tax rate: most income excluded from Subpart F. CFC in Ireland with 12.5% rate: not excluded; remains Subpart F. CFC in Cayman with 0% rate: not excluded; full Subpart F.
Effective tax rate calculation: foreign tax actually paid on the income / income amount.
Elections may be required to claim high-tax exception (under Treas. Reg. §1.954-1).
Combined high-tax exception across Subpart F and GILTI:
GILTI also has high-tax exception (also at 18.9% threshold).
If both Subpart F and GILTI exceptions apply: CFC income may be entirely excluded from current US taxation.
Strategic: locating CFC operations in higher-tax jurisdictions can reduce US tax burden via high-tax exception.
Counter: higher foreign tax = more foreign tax paid. May not net benefit if foreign rate exceeds equivalent US rate.
De Minimis Rule
If gross Subpart F income (specifically Foreign Base Company Income and Insurance Income) is less than the LESSER of:
– 5% of gross income, OR
– $1,000,000
Then NONE of the Foreign Base Company Income or Insurance Income is treated as Subpart F (i.e., they’re treated as tested income for GILTI purposes).
Full inclusion rule (counter to de minimis): if gross FBC income exceeds 70% of total gross income, ALL gross income treated as FBC income (full Subpart F inclusion).
Practical:
Small Subpart F income in primarily-operating CFC: excluded under de minimis.
Mostly-passive CFC: full inclusion rule may apply.
Middle-ground CFC: regular Subpart F rules apply.
Example: CFC has $50M of operating income + $1M of investment income. Investment income is 2% of total gross income. Under 5% threshold; de minimis applies. The $1M of investment income is NOT Subpart F; flows to GILTI tested income instead.
Example 2: CFC has $1M of operating income + $5M of investment income. Investment income is 83% of total. Over 70% threshold; full inclusion applies. ALL income (including operating) treated as Subpart F.
Calculation and Inclusion
US shareholder inclusion of Subpart F:
Step 1: Identify Subpart F income categories at CFC level.
Step 2: Apply exceptions (high-tax, de minimis, manufacturing, etc.).
Step 3: Allocate to US shareholders based on ownership.
Step 4: Each US shareholder includes their share in current year income.
Step 5: Generally treated as ordinary income (some categories as capital gain).
Foreign tax credit:
Foreign taxes paid by CFC may be claimed as deemed-paid credit under §960. Similar to GILTI’s FTC mechanism.
Differences from GILTI: 100% of foreign tax on Subpart F is creditable (vs. 80% for GILTI). Better treatment for Subpart F.
Limitation: FTC can only offset US tax on Subpart F income (separate FTC basket).
Subpart F vs. GILTI comparison for $1M of CFC profit:
If Subpart F: 100% FTC, ordinary income (no §250 deduction for individuals; corporations don’t get §250 either for Subpart F). If GILTI: 80% FTC, ordinary income (or §250 deduction for corps). Subpart F treatment is generally similar to GILTI for individuals.
Previously Taxed Earnings & Profits (PTI):
Subpart F income that’s been currently taxed becomes ‘previously taxed income’ (PTI) at CFC level. Future distributions of PTI to US shareholders are not taxed again.
Similar to GILTI treatment.
Tracking PTI: Schedule J of Form 5471 tracks PTI by category.
Subpart F and GILTI Interaction
Subpart F and GILTI work together but apply to different income.
Order of operations:
1. Identify Subpart F income: FPHCI, FBCSI, insurance income, etc.
2. Apply exceptions (high-tax, de minimis, manufacturing).
3. Subpart F income that survives: currently taxed under §951.
4. Remaining CFC tested income: subject to GILTI under §951A.
5. Both inclusions in US shareholder’s current taxable income.
Different FTC mechanisms:
Subpart F FTC: 100% creditable; specific FTC basket. GILTI FTC: 80% creditable; separate FTC basket; can’t be cross-credited.
Different §250 deductions:
Subpart F: no §250 deduction. GILTI: 50% §250 deduction for corporations or §962-electing individuals.
Different rate consequences:
Subpart F: ordinary rates (no rate preference). GILTI: ordinary rates without election; 10.5% effective rate with §962 + §250.
Strategic implications:
If income would otherwise be Subpart F: claim high-tax exception (excludes from Subpart F; may fall into GILTI exclusion too). If in low-tax CFC: full GILTI taxation; consider §962 election. If in moderately-taxed CFC: balance between Subpart F categories and GILTI tested income depending on activities.
Coordination is technical. Specialized international tax counsel essential.
Form 5471 Reporting
Form 5471 reports both Subpart F and GILTI:
Schedule F (Balance Sheet): CFC financial position.
Schedule G (Other Information): operational details.
Schedule H (Current Earnings and Profits): annual earnings tracking.
Schedule I (Summary of Shareholder’s Income from Foreign Corporation): summary of Subpart F and GILTI inclusion.
Schedule I-1 (GILTI Calculation): detailed GILTI computation.
Schedule J (Accumulated Earnings and Profits / Previously Taxed E&P): tracks PTI.
Schedule M (Related Party Transactions): transfer pricing details.
Schedule O (Organization/Reorganization): structural information.
Schedule P (Previously Taxed Earnings and Profits of US Shareholder): individual PTI tracking.
Other schedules as applicable.
Form 8992 (US Shareholder’s Calculation of GILTI): supplementary GILTI form.
Form 8993 (§250 Deduction): for §250 deduction claim.
Reporting complexity: multiple forms; multiple schedules; foreign accounting reconciliation.
Penalties:
Form 5471: $10K-$50K per CFC per year for failure.
Form 8992, 8993: separate forms with their own penalties.
Continuing failure escalation under §6038(b).
Statute of limitations: extended indefinitely for unfiled Form 5471 under §6501(c)(8).
Professional preparation: Form 5471 + GILTI + Subpart F: $5K-$25K+ per CFC annually. Specialized international tax CPA essential.
Common Subpart F Scenarios
Scenario 1: US person inherits foreign holding company.
Foreign company holds investment portfolio. After inheritance, becomes CFC (assuming control via attribution).
Investment income (dividends, interest, capital gains) = FPHCI. Currently taxable to US shareholder annually.
Solution: dispose of foreign holding company; reinvest in US securities. Avoid ongoing Subpart F compliance.
Scenario 2: US software company with Irish subsidiary.
Irish sub provides services. Most income is operating (tested income; subject to GILTI).
Investment income on Irish sub’s cash reserves: FPHCI; currently taxable as Subpart F.
Distinction matters: Subpart F treatment vs. GILTI treatment differ in FTC and §250 deduction availability.
Scenario 3: US-controlled offshore investment fund.
Cayman Islands fund with majority US ownership. CFC.
Cayman has 0% tax. All passive income (dividends, interest, capital gains) is FPHCI.
Full Subpart F inclusion to US shareholders.
Practical: most offshore funds structured to have non-US majority ownership (avoiding CFC status). Tax-efficient structuring matters.
Scenario 4: US manufacturer with foreign sales sub.
US manufactures products in US; sells to French subsidiary; French sub resells in EU.
Foreign sub’s resale income = potentially FBCSI (related-party purchase, not manufactured locally, sold abroad).
But: if products are ‘manufactured’ to some degree in France (substantial change), exception may apply.
Transfer pricing planning: ensure French sub has appropriate margin for activities performed.
Scenario 5: US owner with foreign rental real estate held through CFC.
CFC owns Spanish rental properties. Rental income is potentially FPHCI.
Active rental business exception: may apply if substantial activity in CFC’s jurisdiction.
If passive holding: FPHCI; full Subpart F taxation.
Common Mistakes
Issues we see:
1. Not identifying CFC status. Foreign corporation ownership may aggregate to CFC via attribution.
2. Subpart F not recognized. Foreign investment company income treated as deferred when it’s currently taxable.
3. Form 5471 not filed. Severe penalties.
4. PTI tracking failures. Distribution treated as taxable when it should be tax-free.
5. FTC computation errors. Subpart F vs. GILTI baskets confused.
6. High-tax exception not elected when available.
7. De minimis rule not applied.
8. Transfer pricing issues affecting FBCSI determination.
9. Foreign tax return information needed for US compliance. Coordination challenges.
10. State conformity. Some states treat Subpart F and GILTI differently.
Professional team essential. Specialized international tax counsel + CPA experienced with CFC compliance.
Related Services from The Reed Corporation
Sources & References
Frequently Asked Questions
I inherited a Cayman Islands investment company from my uncle. Annual investment income is about $400,000. As a US citizen, what tax treatment applies?
Subpart F applies. Let me walk through.
Your situation: – US citizen – Inherited Cayman Islands investment company – Annual investment income: $400,000 – Cayman has 0% corporate tax
CFC determination:
If you control >50% (which is implied since you ‘inherited the company’), it’s a CFC. You’re a US shareholder owning >10%.
Form 5471 filing required annually.
Income characterization:
Investment income (dividends, interest, capital gains) = Foreign Personal Holding Company Income (FPHCI). This is Subpart F income.
For passive investment company in Cayman: – Likely 100% of income is FPHCI – All currently taxable to you as Subpart F
Will GILTI also apply?
Generally no — GILTI applies to tested income, which excludes Subpart F income. Since all the income is Subpart F, GILTI doesn’t add anything.
US Tax Treatment:
Subpart F inclusion: $400,000 (your full share)
For individual US shareholder: – Ordinary income at marginal rate (up to 37% federal) – Plus NIIT (3.8% on investment income above threshold) – Plus state/city tax
At your top bracket: – Federal: $400K × 37% = $148K – NIIT: $400K × 3.8% = $15.2K – NY state: $400K × 6.85% = $27.4K – NYC: $400K × 3.876% = $15.5K – Total: ~$206K of US tax annually on $400K of Cayman investment income
That’s a 51% effective US tax rate.
Foreign Tax Credit:
Cayman has 0% corporate tax. So no FTC available.
US tax on Cayman income: full ~51%.
Note: this is much worse than holding the same investments personally.
If you held the investments personally (Cayman company dissolved): – Same investment income – Long-term capital gains and qualified dividends: 20% federal + 3.8% NIIT + state – Effectively 30-35% combined
Cayman holding structure adds 16-20 percentage points of tax. Bad.
Why uncle held in Cayman:
Probably for non-US-tax purposes (estate planning, asset protection, privacy). May have benefited from Cayman’s tax-free status during his lifetime if he wasn’t US.
If uncle was US person: he should have been paying US Subpart F too. May have been non-US person where Cayman structure worked.
Solutions for you:
Option 1: Liquidate the Cayman company.
Dissolve the company. Distribute investments to you personally.
Tax consequences: – Liquidating distribution: gain recognition at corporate level (Cayman, 0%) and shareholder level (you, ordinary income for some portions, capital gain for others) – §1248 may convert some gain to dividend – Investments now in your hands personally
Going forward: investments taxed personally at standard rates (~30-35% combined). Much better than Subpart F ongoing.
One-time tax cost to liquidate: depends on accumulated earnings and unrealized gains. Could be substantial but bounded.
Option 2: Maintain Cayman structure with strategic distributions.
Keep Cayman company. Take strategic distributions to manage timing.
Accumulated earnings in Cayman company: since you’ve been taxed on Subpart F annually, distributions of those previously-taxed earnings (PTI) are tax-free at distribution.
Distribute $400K of Subpart F-taxed earnings: $0 distribution tax at your level.
But: Subpart F continues to apply to new investment income. Annual US tax of ~$206K continues.
No benefit over personal ownership.
Option 3: Switch investments to non-Subpart F income.
If Cayman company can earn active business income (real estate development, operating business, etc.), might avoid Subpart F.
But investment portfolio fundamentally produces passive income. Changing investment strategy isn’t a real fix.
Option 4: Inherit and dispose immediately.
If you haven’t fully inherited: have estate sell Cayman company instead of distributing to you. Estate pays any applicable tax; you receive cash.
Benefit: no future Subpart F obligations.
Option 5: Sell Cayman shares.
Sell the Cayman company shares to non-US buyer. You’re no longer a US shareholder of CFC. Subpart F ends.
Tax: capital gain on sale of Cayman shares; possibly §1248 conversion to dividend treatment for some accumulated earnings portion.
If there are accumulated earnings and profits: §1248 may convert that portion to dividend income (ordinary rates if not qualified; potentially qualified if structured well).
Net: bounded one-time tax; then no ongoing Subpart F.
My recommendation: Option 1 (Liquidate).
For your situation: – Inherited Cayman company with passive investments – Ongoing Subpart F is unfavorable – Personal ownership of investments produces same income with much better US tax treatment – One-time liquidation cost vs. years of penal Subpart F
Process:
1. Hire international tax attorney specializing in CFC liquidations.
2. Determine company’s investments, basis, accumulated earnings.
3. Plan liquidation tax efficiently: – Time the liquidation to lower-income year if possible – Coordinate with §1248 dividend treatment – Use available foreign tax credit if any
4. Liquidate company: – Dissolution at Cayman level – Distribution to you personally – File appropriate tax forms
5. Receive investments in your personal name.
6. Going forward: standard investment taxation at personal rates.
7. Annual compliance: simple — no Form 5471, no Subpart F.
Cost: – Professional fees for liquidation: $10K-$30K – One-time tax on liquidating distribution: $50K-$150K (depending on accumulated E&P and unrealized appreciation) – Going forward: standard personal investment tax compliance
Vs. maintaining Cayman company: – Annual Form 5471: $5K-$15K compliance cost – Annual Subpart F tax: ~$206K – Ongoing administrative burden
Liquidation is the clearly better long-term path.
Final note: if accumulated earnings in Cayman company are large (say $5M of accumulated earnings, all previously taxed as Subpart F by you or uncle), the distribution of PTI is tax-free. The liquidation may be much more efficient than I described above.
Get specialized international tax counsel ASAP. The Cayman investment structure is currently costing you $200K+ annually in US tax. Resolve it expeditiously.