RoutineMetric

IRC Section 951A GILTI Tax & FTC Model Optimizer

Model Controlled Foreign Corporations (CFCs), evaluate Section 960(d) foreign tax credits, and analyze the critical 2026 TCJA sunset impact.

Analyze how foreign business assets, tested losses, and localized taxes interact under the Global Intangible Low-Taxed Income (GILTI) rules. Compare standard 2025 rules side-by-side with 2026 statutory rates to safeguard international tax planning.

Global Configurations

Load Preset International Tax Scenarios

CFC Registry Modeler

3 Active CFCs
CFC NameTested Inc / Loss ($)QBAI ($)Foreign Taxes ($)Net Interest Expense ($)Action
CFC Ireland$1,200,000$200,000$150,000$0
CFC Cayman Co$600,000$0$0$0
CFC Switzerland$400,000$100,000$32,000$10,000
Add Controlled Foreign Corporation
GILTI Statutory Inclusion (Section 951A)$2,180,000

Net taxable foreign intangible return.

Estimated US Net GILTI Tax Due$165,519
Effective US Rate:7.59%
Allowed Section 960(d) FTCs$144,276
Lost FTCs (80% / 904 Cap):$36,069

Side-by-Side TCJA Sunset Comparison

Tax Cut and Jobs Act (TCJA) sunset decreases the Section 250 GILTI deduction from 50% in 2025 down to 37.5% in 2026.

Tax Metric2025 (50% Ded)2026 (37.5% Ded)
Section 250 Deduction$1,180,173$885,130
GILTI Taxable Base$1,180,173$1,475,216
Deemed-Paid FTC (80%)$144,276$144,276
Final Net US Tax$103,560$165,519
Sunset Impact: Net tax increased by $61,959 for tax year 2026!

Step-by-Step Calculation Ledger

Aggregate CFC Tested Income (Profitable)$2,200,000
Aggregate CFC Tested Loss (Deficit)-$0
Net CFC Tested Income$2,200,000
Aggregate QBAI Base (10% standard return)$300,000
Gross Deemed Tangible Return (10% of QBAI)$30,000
Net Tested Interest Expense (Reduces DTIR)$10,000
Net Deemed Tangible Return (Net DTIR)$20,000
Section 960(d) Inclusion Percentage99.09%
Section 78 Gross-Up (100% Tax Deemed Paid)$180,345.455
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Technical Guide: Understanding IRC Section 951A GILTI Tax Rules

The Global Intangible Low-Taxed Income (GILTI) provision under IRC Section 951A was introduced by the 2017 Tax Cuts and Jobs Act (TCJA) as a fundamental shift toward a quasi-territorial tax model. GILTI serves as an outbound minimum tax designed to penalize US multinational corporations that shift high-yield intangible profits (such as software patents, IP rights, or pharmaceutical licensing) to Controlled Foreign Corporations (CFCs) located in low-tax jurisdictions.

The Mechanical Math of Section 951A Calculations

Unlike traditional Subpart F provisions that apply to specific passive categories of foreign income, GILTI calculations utilize an entity-wide aggregate model. The calculation flows through a sequence of strict statutory steps:

  1. Tested Income and Tested Losses: For each CFC in which a US entity is a 10% shareholder, tested income or tested loss must be individually computed. These are aggregate net profit figures adjusted to exclude Subpart F income, effectively connected US income, and certain foreign oil and gas extraction income.
  2. Net CFC Tested Income: Tested losses are aggregated to directly offset tested income. If the consolidated net tested income is zero or negative, no GILTI inclusion occurs.
  3. Deemed Tangible Return (DTIR): Multinationals are allowed a standard 10% routine yield on their foreign tangible assets (known as QBAI). This is intended to shield capital-intensive manufacturing investments from intangible tax calculations.
  4. Specified Interest Expense: Any business interest expense allocated to the tested income layer reduces the 10% standard DTIR shield, effectively increasing the taxable intangible exposure.
  5. GILTI Inclusion: The net taxable inclusion is computed as:
    GILTI Inclusion = Net Tested Income - (DTIR - Specified Interest Expense)

The Critical 2026 Sunset Event & Section 250 Deduction Reductions

The Section 250 deduction is the mechanical valve that maintains a lower effective tax rate on GILTI. However, this deduction is subject to a statutory sunset scheduled for tax years beginning after December 31, 2025:

  • Through December 31, 2025: Corporate taxpayers are allowed a 50% deduction under Section 250 on their GILTI inclusion and Section 78 gross-up, yielding an effective tax rate of 10.5%.
  • Starting January 1, 2026 (The Sunset): The Section 250 deduction rate automatically drops to 37.5%. Under a constant 21% US federal corporate tax rate, this results in an increased effective GILTI tax rate of 13.125%.

Decoding the Section 960(d) Foreign Tax Credit Haircut

US corporate shareholders can offset US GILTI liabilities using foreign tax credits (FTCs) under Section 960(d). However, GILTI FTCs carry three major structural handicaps:

  • The 80% Haircut: Only 80% of foreign taxes paid by CFCs attributable to tested income are eligible for credit. The remaining 20% is permanently lost.
  • No Carryforwards or Carrybacks: Unlike General or Passive basket FTCs, GILTI basket foreign tax credits have zero carryback and zero carryforward capabilities. If credits cannot be utilized in the active tax year (due to the 80% haircut or Section 904 limitations), they expire worthless.
  • Loss CFC Exclusion: Foreign taxes paid by any CFC currently in a tested loss position are completely excluded from the Section 960(d) calculation pool, severely diminishing credit utilization.

Corporate Mitigation and Tax Planning

To manage the 2026 sunset and mitigate double-taxation, tax advisors recommend several structuring strategies:

  • Accelerating Income: Pulling forward tested income or CFC dividends into pre-2026 tax periods to lock in the beneficial 50% Section 250 deduction rate.
  • QBAI Asset Management: Re-evaluating the placement of high-value tangible personal property under ADS depreciation rules. Placing tangible manufacturing facilities in moderately-taxed foreign regions increases the QBAI shield across all CFCs globally.
  • Debt Restructuring: Minimizing net interest expenses at the CFC level to avoid erosion of the 10% standard DTIR shield.
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