Comprehensive guide for contractors in Argentina receiving stock options, RSUs, or other equity compensation from US companies.

Table of Contents

Quick Answer

For Argentine Contractors Receiving Stock Options:

QuestionAnswer
Can I receive stock options from a US company?✅ Yes, typically NSOs (not ISOs)
Will the US tax me?⚠️ Depends on where you worked during vesting
If 100% remote from Argentina?✅ No US tax - income is foreign-sourced
Will Argentina tax me?✅ Yes - taxed at exercise as ordinary income (up to 35%)
Capital gains when I sell shares?✅ Argentina taxes at 15% on the gain
Is there a US-Argentina tax treaty?❌ No - potential double taxation if work in US

Key Principle

If you work 100% from Argentina, your stock option income is not US-sourced, meaning:

  • ❌ No US income tax
  • ❌ No US withholding
  • ✅ Only Argentina taxes apply

If you work partially in the US, the US-sourced portion is taxable by the US, plus Argentina taxes the full amount (with potential for double taxation).

No Tax Treaty Between US and Argentina

Critical Fact: The United States and Argentina do NOT have an income tax treaty.

What This Means

AspectImpact
No treaty benefitsCannot claim reduced withholding rates
No tie-breaker rulesBoth countries may claim tax jurisdiction
Double taxation possibleIf work performed in US, both countries may tax
No exchange of informationLimited cooperation between tax authorities
No permanent establishment rulesComplex determination of taxing rights

Practical Implication

For most contractors working 100% remotely from Argentina:

  • The lack of treaty doesn’t matter
  • US doesn’t tax foreign-source income regardless of treaty status
  • Only becomes an issue if you work physically in the US

Types of Equity Compensation

NSOs (Non-Qualified Stock Options)

Most common for contractors.

FeatureDetails
Who can receive✅ Employees, contractors, advisors - anyone
Tax eventAt exercise (when you buy the shares)
Taxable amount”Spread” = Fair Market Value - Strike Price
Tax typeOrdinary income (not capital gains)
US tax for NRAOnly if services performed in US

Example:

Grant: 1,000 options at $10 strike price
Exercise: When stock is $50/share
Spread: $50 - $10 = $40/share
Taxable income: $40 × 1,000 = $40,000

ISOs (Incentive Stock Options)

NOT available to contractors.

FeatureDetails
Who can receive❌ US employees ONLY
Contractors eligible?❌ No
International workers❌ No special benefit even if eligible
Why not for contractorsIRS rules require employee status

If a US company offers you ISOs as a contractor, they’re making an error.

RSUs (Restricted Stock Units)

Can be granted to contractors.

FeatureDetails
Who can receive✅ Employees and contractors
Tax eventAt vesting (when shares are delivered)
Taxable amountFair market value of shares at vesting
Tax typeOrdinary income
US tax for NRAOnly if services performed in US

Example:

Grant: 100 RSUs vesting over 4 years (25/year)
Year 1 vesting: 25 shares when FMV = $100
Taxable income Year 1: 25 × $100 = $2,500

US Tax Treatment for Argentine Contractors

The Critical Question: Where Were Services Performed?

The US taxes non-resident aliens on a territorial basis for compensation income. The key factor is:

Where were you physically located when performing the services that earned the equity?

Location of WorkUS Tax Result
100% in Argentina❌ No US tax - foreign source income
100% in US✅ 30% US tax on the full spread
Mixed (some US, some Argentina)⚠️ Apportioned based on work days

Scenario 1: 100% Remote from Argentina

The typical case for Argentine contractors.

Facts:

  • You’re hired as a contractor by a US company
  • You work 100% remotely from Argentina
  • You never travel to the US for work
  • You receive NSO grants that vest over 4 years

US Tax Result:

  • ✅ No US income tax on exercise
  • ✅ No US withholding required
  • ✅ No Form 1042-S required (likely)
  • ✅ Full spread is foreign-source income
  • ✅ Only Argentina taxes apply

Why? The source of compensation income is where services are performed, not where the company is located. Since you worked in Argentina, the income is Argentina-sourced.

Scenario 2: Mixed Location (Some Work in US)

When you travel to the US for work.

Facts:

  • You work as a contractor from Argentina
  • You travel to the US for meetings/onsite work
  • During 4-year vesting: 350 days in US, 950 days in Argentina (total 1,300 work days)
  • You exercise NSOs with $100,000 spread

Allocation Calculation:

US days: 350 / 1,300 = 26.9%
Argentina days: 950 / 1,300 = 73.1%
US-source income: $100,000 × 26.9% = $26,900
Foreign-source income: $100,000 × 73.1% = $73,100

US Tax Result:

  • ⚠️ $26,900 is US-source income
  • ⚠️ Subject to 30% US withholding = $8,070
  • ⚠️ Form 1042-S required to report
  • ⚠️ Must file US tax return to claim any refund

Argentina Tax Result:

  • ⚠️ Full $100,000 taxed in Argentina
  • ⚠️ No foreign tax credit for US tax (no treaty)
  • ⚠️ Potential double taxation on US-source portion

Argentine Tax Obligations

Income Tax (Impuesto a las Ganancias)

Argentina taxes residents on worldwide income, including equity compensation from foreign companies.

2025 Tax Rates (Progressive):

Taxable Income (ARS)Rate
Up to threshold5%
Middle brackets9% - 31%
Over ~53,153,257 ARS35%

Note: Thresholds are updated periodically due to inflation. The 35% top rate applies to roughly USD $50,000+ of taxable income (depending on exchange rate).

When Stock Options Are Taxed in Argentina

Tax Event: At exercise (when you buy the shares)

Taxable Amount:

Fair Market Value at exercise - Strike Price = Taxable Income

Classification: Ordinary income (employment/service income category)

Reporting:

  • Report through annual income tax return (Ganancias)
  • Due dates typically in June following the tax year
  • May require estimated payments during the year

Capital Gains on Share Sales

After you exercise options and hold shares:

AspectTreatment
Tax eventWhen you sell the shares
Taxable amountSale price - Exercise date FMV
Tax rate15% flat rate
ExemptionShares traded on Buenos Aires Stock Exchange may be exempt

Example:

Exercise: Buy shares at $50 FMV (already taxed as income)
Sell later: Shares at $75
Capital gain: $75 - $50 = $25/share
Argentine tax: $25 × 15% = $3.75/share

US Shares (not traded on BYMA):

  • No exemption applies
  • 15% capital gains tax on the gain
  • Report via annual tax return

Practical Examples

Example 1: NSO Grant - 100% Argentina Work

Situation:

  • Argentine contractor working 100% remote from Buenos Aires
  • Granted 5,000 NSOs at $10 strike price over 4-year vest
  • Year 4: Exercises all options when FMV = $60/share
  • Exchange rate: 1 USD = 1,000 ARS

Calculations:

Spread per share: $60 - $10 = $50
Total spread: $50 × 5,000 = $250,000 USD
US Tax:
- Income source: 100% Argentina (foreign)
- US tax: $0
- US withholding: $0
- Form 1042-S: Not required
Argentine Tax (Ganancias):
- Taxable income: $250,000 USD × 1,000 = 250,000,000 ARS
- Tax rate: 35% (high income)
- Approximate tax: 87,500,000 ARS (~$87,500 USD)

Net Proceeds:

Gross value: $300,000 (5,000 × $60)
Cost: $50,000 (5,000 × $10)
Argentine tax: ~$87,500
Net: ~$162,500

Example 2: NSO Grant - Mixed Location

Situation:

  • Argentine contractor who traveled to US for some work
  • Same grant as Example 1
  • During vesting: 200 days in US, 800 days in Argentina

Calculations:

US portion: 200/1,000 = 20%
Argentina portion: 800/1,000 = 80%
Total spread: $250,000
US-Source Income: $250,000 × 20% = $50,000
Foreign-Source Income: $250,000 × 80% = $200,000
US Tax:
- US-source income: $50,000
- 30% withholding: $15,000
- Form 1042-S: Required
Argentine Tax:
- Taxable income: Full $250,000
- Tax: ~$87,500 (no credit for US tax - no treaty)
Total Tax Burden:
- US: $15,000
- Argentina: $87,500
- Total: $102,500 (vs. $87,500 if 100% Argentina)
- Double taxation: $15,000 on US-source portion

Example 3: RSU Vesting

Situation:

  • Granted 1,000 RSUs vesting 25% per year
  • Year 1: 250 shares vest when FMV = $40
  • 100% work from Argentina

Calculations:

Vesting value: 250 × $40 = $10,000 USD
US Tax:
- 100% foreign source
- US tax: $0
Argentine Tax:
- Taxable income: $10,000 × 1,000 ARS = 10,000,000 ARS
- Progressive rate applies based on total income

Double Taxation Risk

The Problem

Since there’s no US-Argentina tax treaty:

If YouUS TaxArgentina TaxDouble Taxed?
Work 100% in Argentina$0Full amount❌ No
Work partially in US30% on US portionFull amount✅ Yes, on US portion
Live in US temporarilyFull amountMay claim exemption⚠️ Depends

Mitigation Strategies

1. Minimize US Work Days

  • Work remotely as much as possible
  • Limit travel to the US during vesting periods
  • Document all work locations carefully

2. Time Your Exercise

  • If you must work in US, consider timing of exercises
  • Exercise in years with fewer US work days
  • Understand the allocation formula

3. Consult Tax Professionals

  • Argentine CPA familiar with US equity
  • US tax professional for NRA issues
  • Consider cost vs. benefit for complex situations

US Company Obligations

For Argentine Contractors Working 100% Remote

ObligationRequired?
Collect Form W-8BEN✅ Yes, always
Withhold on exercise❌ No (foreign source)
File Form 1042-S❌ Generally no
Report to IRS❌ Not for foreign source

For Mixed-Location Contractors

ObligationRequired?
Collect Form W-8BEN✅ Yes
Allocate income by location✅ Yes
Withhold 30% on US portion✅ Yes
File Form 1042-S✅ Yes (due March 15)
File Form 1042✅ Yes (annual return)

Best Practices for US Companies

  1. Get W-8BEN before grant

    • Establishes foreign status
    • Keep on file for 3 years
  2. Include location clause in agreements

    • “Contractor will perform services from Argentina”
    • “Contractor will notify Company of any US work days”
  3. Track work locations

    • Require reporting of US travel
    • Document for withholding determination
  4. Consult equity compensation specialist

    • Complex area with significant penalties
    • Worth professional guidance for large grants

Argentine Contractor Obligations

Before Receiving Equity

  1. Understand the grant terms

    • Type of equity (NSO, RSU, other)
    • Vesting schedule
    • Exercise price and process
  2. Provide Form W-8BEN

    • Certify foreign status
    • Update if circumstances change
  3. Document work location

    • Track days worked in each country
    • Keep records of remote work

At Exercise/Vesting

  1. Calculate taxable income

    • Track FMV on exercise/vesting date
    • Convert to ARS using proper exchange rate
  2. Plan for Argentine tax

    • Set aside funds for Ganancias
    • Consider estimated payments
  3. Report on annual return

    • Include in income tax declaration
    • Proper categorization as employment income

When Selling Shares

  1. Calculate capital gain

    • Sale price minus FMV at exercise
    • Convert to ARS
  2. Apply 15% tax

    • Report on annual return
    • Pay with return or estimated
  3. Keep records

    • Broker statements
    • Exercise confirmations
    • Exchange rate documentation

Documentation Requirements

For Argentine Contractors

DocumentPurposeRetention
Stock option agreementTerms of grantDuration + 7 years
Exercise confirmationsProve exercise date/price7 years
Broker statementsSale prices, cost basis7 years
Form W-8BEN copyProof of US filing3 years
Work location recordsSource allocation7 years
Exchange rate recordsARS conversion7 years
Tax returnsCompliance proof7 years

For US Companies

DocumentPurposeRetention
Form W-8BENForeign status3 years from receipt
Grant agreementsTerms of equityDuration + 7 years
Location certificationsSource determination7 years
Form 1042-S (if filed)Withholding report7 years
Withholding recordsCompliance proof7 years

Common Mistakes to Avoid

❌ Mistake 1: Assuming US Always Taxes

Wrong: “US company = US tax”

Correct: US only taxes income sourced in the US. Remote work from Argentina = foreign source = no US tax.

❌ Mistake 2: Not Reporting in Argentina

Wrong: “US company paid me, Argentina doesn’t know”

Correct: Argentina taxes worldwide income. US equity compensation must be reported.

❌ Mistake 3: Ignoring Work Location Tracking

Wrong: Not documenting where work was performed

Correct: Keep detailed records of work days by country, especially if any US travel.

❌ Mistake 4: Confusing Exercise with Sale

Wrong: Waiting until share sale to report income

Correct:

  • Exercise/vesting = ordinary income tax event
  • Sale = capital gains tax event (if gain)

❌ Mistake 5: Using Wrong Exchange Rate

Wrong: Using any convenient exchange rate

Correct: Use official rates (AFIP/ARCA published rates) on transaction dates.

❌ Mistake 6: Not Planning for Taxes

Wrong: Exercising without funds for tax

Correct: Set aside 35%+ of spread for Argentine taxes before spending proceeds.

❌ Mistake 7: Expecting Treaty Benefits

Wrong: Claiming tax treaty benefits

Correct: No US-Argentina tax treaty exists. No reduced rates or credits available.

Summary Checklist

✅ As Argentine Contractor Receiving Equity

Before Grant:

  • Understand grant type (NSO, RSU, etc.)
  • Provide Form W-8BEN to US company
  • Confirm you’ll work 100% from Argentina
  • Consult Argentine tax advisor on implications

During Vesting:

  • Track all work days by location
  • Document any US travel for work
  • Update W-8BEN if circumstances change
  • Plan for tax payments at exercise

At Exercise/Vesting:

  • Record FMV on exercise/vesting date
  • Calculate spread (FMV - strike price)
  • Convert to ARS using official rate
  • Set aside funds for taxes (35%+)

For Argentine Taxes:

  • Report on annual Ganancias return
  • Categorize as employment/service income
  • Pay tax by due date
  • Keep all records 7 years

When Selling Shares:

  • Calculate capital gain (sale price - exercise FMV)
  • Apply 15% capital gains tax
  • Report on annual return
  • Keep broker statements

Resources

IRS (US Tax Authority)

Argentina Tax Authority (ARCA/AFIP)

Professional Resources


Last Updated: 2025-12-04 Based on: IRS regulations, Argentine tax law (Impuesto a las Ganancias), PWC tax summaries

Disclaimer: This document is for informational purposes only and does not constitute legal or tax advice. Tax laws are complex and change frequently. The lack of a US-Argentina tax treaty creates additional complexity. Always consult with qualified tax professionals in both the US and Argentina for advice specific to your situation. Large equity grants warrant professional guidance.