Ch8. International Taxation — Cross-Border Transactions and Avoiding Double Taxation

What Is International Taxation?

International tax: The area of tax law governing taxation when economic activity spans more than one country.

As globalization has accelerated — with multinational corporations, digital businesses, remote workers, and cross-border investments becoming commonplace — two central problems dominate international tax policy:

Double taxation: The same income taxed by two countries
Tax avoidance / base erosion: Income shifted to low-tax jurisdictions to avoid tax in high-tax countries

The Double Taxation Problem

Double taxation: The same income or asset being taxed by two or more sovereign governments.

Example:

A US corporation earns business income in Germany
Germany taxes the income as German-source income
The US taxes the income as part of the US corporation’s worldwide income
Result: The same profit is taxed twice

How the US Resolves Double Taxation

1. Tax Treaties (Income Tax Treaties / Double Taxation Agreements)

The US has tax treaties with over 65 countries. Treaties:

Allocate taxing rights between the residence country (where the taxpayer lives/is incorporated) and the source country (where income is earned)
Reduce withholding tax rates on dividends, interest, and royalties paid to foreign residents
Establish tie-breaker rules for dual-resident taxpayers
Provide for mandatory binding arbitration in some modern treaties
Enable information exchange between tax authorities

2. Foreign Tax Credit (IRC § 901)

Even without a treaty, US taxpayers can claim a Foreign Tax Credit for taxes paid to foreign governments on foreign-source income:

Foreign Tax Credit:
- Reduces US tax by the amount of foreign tax paid
- Subject to a foreign tax credit limitation:
  Credit limited to: (Foreign-source income / Total income) × US tax
- Excess credits can be carried back 1 year or forward 10 years
- Form 1116 (individuals) or Form 1118 (corporations)

Residency and the Worldwide Income Principle

The US taxes its citizens and residents on worldwide income — one of only two countries in the world (with Eritrea) that taxes based on citizenship rather than residency.

US person (subject to worldwide taxation):

US citizens (regardless of where they live)
Lawful permanent residents (green card holders)
Resident aliens (substantial presence test: 183-day rule under IRC § 7701(b))

183-Day Test:

Days in current year (× 1) + Days in prior year (× 1/3) + Days in 2nd prior year (× 1/6) ≥ 183

Example:
2024: 120 days × 1 = 120
2023: 120 days × 1/3 = 40
2022: 120 days × 1/6 = 20
Total: 180 < 183 → NOT resident alien in 2024

120+1/3(130)+1/6(130) = 120+43+22 = 185 → WOULD be resident alien

Transfer Pricing

Transfer pricing: The prices charged between related parties (parent company, subsidiaries, affiliates) in cross-border transactions.

The Problem: Multinational groups can manipulate transfer prices to shift profit from high-tax countries to low-tax affiliates:

Example of abusive transfer pricing:
US parent company sells goods to its Irish subsidiary at cost ($100)
Irish subsidiary resells to customers for $200
Profit: $100 sits in Ireland (12.5% corporate tax)
Not in the US (21% corporate tax)

The Arm’s Length Standard (IRC § 482): Related-party transactions must be priced as if the parties were unrelated and dealing at arm’s length. If transfer prices deviate from arm’s length, the IRS can reallocate income to reflect the proper amount.

OECD Transfer Pricing Guidelines are incorporated by reference in US Treasury Regulations (Treas. Reg. § 1.482) and provide the accepted methodologies.

BEPS and the Global Minimum Tax

BEPS (Base Erosion and Profit Shifting): The OECD/G20 project to counter multinational tax avoidance strategies that erode the tax base of individual countries.

Background

Major multinationals (Apple, Google, Starbucks) were using legal but aggressive strategies to minimize global taxes:

Registering intellectual property in low-tax Ireland or Netherlands
Routing royalties from high-tax countries to low-tax entities
Creating “stateless” entities subject to no country’s tax

The BEPS 15 Action Plans (2015 package) established international minimum standards.

Pillar One and Pillar Two (2021–)

Pillar One: Reallocates a portion of large multinationals’ profits to the market jurisdictions where revenue is earned — regardless of physical presence.

Pillar Two — Global Minimum Tax (GMT):

Pillar Two (Global Anti-Base Erosion Rules — GloBE):
- Target: Multinationals with revenue ≥ €750 million (~$800 million)
- Minimum effective tax rate: 15%
- If a group's effective rate in any jurisdiction falls below 15%,
  a "top-up tax" is collected by the parent entity's country

US implementation:
- The US has enacted GILTI (Global Intangible Low-Tax Income) under IRC § 951A
  as a partial analog to Pillar Two, but has not yet fully adopted GloBE rules
- Other countries began applying GloBE rules in 2024

Foreign Account Reporting — FBAR and FATCA

FBAR (Foreign Bank Account Report — FinCEN Form 114)

US persons with a financial interest in or signature authority over foreign financial accounts must file an FBAR if the aggregate value of all foreign accounts exceeds $10,000 at any point in the year:

FBAR details:
- Filed with FinCEN (not the IRS) electronically
- Due date: April 15 (automatic extension to October 15)
- Penalties for willful non-filing: up to $100,000 or 50% of account balance
  (per year), whichever is greater — plus potential criminal prosecution

FATCA (Foreign Account Tax Compliance Act — IRC § 6038D)

Individual US taxpayers with specified foreign financial assets above certain thresholds must report on Form 8938 attached to their Form 1040:

Form 8938 thresholds (single filer living in US):
- $50,000 at year-end OR $75,000 at any point during the year

Penalties: $10,000 failure-to-file; additional $10,000 per 30-day period
after notice; up to $50,000 total

FATCA also requires foreign financial institutions to report
US account holders to the IRS (or face 30% withholding on
US-source payments) — making it very difficult to hide foreign accounts.

Cross-Border Investment Tax Considerations

For US residents investing internationally:

Foreign dividends: Subject to ordinary income or qualified dividend rates (if from countries with a qualifying tax treaty)
Capital gains on foreign stocks: Long-term or short-term rates based on holding period; reported on Schedule D
Foreign mutual funds / PFICs: Passive Foreign Investment Companies — subject to punitive “excess distribution” rules (very high effective tax rates); use Form 8621
Foreign currency gains/losses: Taxable; reported on Form 1040 or Form 8949

Learning Checklist

Explain the cause of international double taxation and two methods of relief
Describe the arm’s length standard and why the IRS can reallocate income
Explain the purpose of the BEPS project and what the 15% Global Minimum Tax means
State the FBAR filing threshold and the consequence of willful non-filing
Describe who is subject to the US worldwide income principle (citizens, green card holders, resident aliens)

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