RSU & ESOP Taxation for NRIs: Complete Guide to Stock Compensation Tax

Restricted Stock Units (RSUs) are the most common form of equity compensation at US tech companies. The tax rules are straightforward in principle but frequently mishandled in practice.

### The Two Taxable Events

RSUs create two separate taxable events:

1. At vesting — The fair market value (FMV) of the shares on the vest date is taxed as ordinary income. Your employer includes this amount in your W-2 (Box 1) and withholds federal, state, Social Security, and Medicare taxes.
2. At sale — When you sell the vested shares, any gain or loss measured from the vest-date FMV to the sale price is a capital gain or loss.

### Example

You receive 100 RSUs that vest on March 15, 2025, when the stock price is $200/share. Your employer reports $20,000 as ordinary income on your W-2. Taxes are withheld — typically at the supplemental income rate of 22% federal (or 37% for amounts over $1 million in supplemental wages in the same year).

You hold the shares and sell them on June 1, 2026, at $250/share. Your capital gain is ($250 - $200) x 100 = $5,000, taxed as a long-term capital gain because you held for more than one year after vesting.

### W-2 Reporting of RSU Income

Your employer reports vested RSU income in W-2 Box 1 (Wages, tips, other compensation). Some employers also break out stock compensation separately in Box 14 for informational purposes. The key boxes to verify:

• Box 1: Includes RSU vest income
• Box 2: Federal income tax withheld (includes withholding on RSU income)
• Box 3 / Box 5: Social Security and Medicare wages (RSU income is subject to FICA up to the Social Security wage base of $176,100 for 2025)
• Box 12, Code V: If present, shows income from exercising NQSOs (not RSUs — but check for accuracy)

Important: Some companies issue a supplemental W-2 or include RSU income on a separate line of your regular W-2. Always reconcile your W-2 against your brokerage's stock plan statement.

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This is the single most expensive mistake NRIs make with stock compensation. It results in paying tax twice on the same RSU income — once at vesting (correct) and again at sale (incorrect).

### How the Problem Arises

When you sell RSU shares, your brokerage issues Form 1099-B. The cost basis reported on this form is often $0 or the grant-date value rather than the vest-date FMV. This happens because your brokerage does not always have visibility into the W-2 income your employer reported.

If you enter the 1099-B cost basis as-is on your Schedule D, the IRS sees a gain equal to the full sale proceeds (or a much larger gain than the actual post-vest appreciation). You end up paying capital gains tax on income that was already taxed as ordinary income on your W-2.

### How to Fix It

On Form 8949, you must adjust the cost basis:

1. Report the 1099-B proceeds in Column (d)
2. Report the 1099-B cost basis in Column (e) — even if it is $0
3. In Column (f), enter adjustment code B (basis reported to IRS is incorrect)
4. In Column (g), enter the adjustment amount — the difference between the correct cost basis (vest-date FMV) and the reported cost basis

### Practical Tip

Keep a spreadsheet that tracks every RSU vest lot: vest date, number of shares, FMV at vest, and the amount included in your W-2. When you sell, match the sale against the correct lot. If you use sell-to-cover (where shares are sold at vest to pay taxes), your brokerage typically handles those shares correctly — but shares you hold and sell later are where the cost basis error occurs.

Estimate your capital gains tax on stock sales using our free calculator.

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Employee Stock Option Plans (ESOPs) grant you the right to purchase company stock at a fixed strike price. The tax treatment depends entirely on whether the option is an Incentive Stock Option (ISO) or a Non-Qualified Stock Option (NQSO).

### Non-Qualified Stock Options (NQSOs)

NQSOs are the simpler of the two types:

• At exercise: The spread (market price minus strike price) is taxed as ordinary income. Your employer includes it in your W-2 (Box 1, and Box 12 Code V) and withholds taxes.
• At sale: Any gain or loss from the exercise-date market price to the sale price is a capital gain or loss.

Example: You exercise 500 NQSOs with a strike price of $50 when the market price is $150. The spread is ($150 - $50) x 500 = $50,000, taxed as ordinary income. If you hold the shares and sell at $180, your capital gain is ($180 - $150) x 500 = $15,000.

### Incentive Stock Options (ISOs)

ISOs receive preferential tax treatment — but with important caveats:

• At exercise: No regular income tax is due. However, the spread is a preference item for the Alternative Minimum Tax (AMT) under IRC Section 56(b)(3).
• Qualifying disposition (hold 2+ years from grant date AND 1+ year from exercise date): The entire gain from strike price to sale price is a long-term capital gain.
• Disqualifying disposition (sell before meeting both holding periods): The spread at exercise is taxed as ordinary income; any additional gain is a capital gain.

### Key Difference Summary

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Some startups allow you to early-exercise stock options — meaning you can exercise before vesting. The shares you receive are subject to a repurchase right (the company can buy them back at cost if you leave before vesting). This creates an opportunity to make a Section 83(b) election.

### What the Election Does

By filing a Section 83(b) election with the IRS within 30 days of exercise, you choose to recognize ordinary income on the spread at the time of exercise — even though the shares have not yet vested. If the stock price is low (common for early-stage startups), the spread may be minimal or zero.

Without 83(b): You are taxed on the spread at each vesting date, when the stock may be worth significantly more.

With 83(b): You are taxed on the (small) spread at exercise. All future appreciation is taxed as capital gains — potentially long-term if you hold for 1+ year after exercise.

### Requirements and Risks

1. File the election with the IRS within 30 calendar days of exercise — no exceptions, no extensions
2. Send a copy to your employer
3. Attach a copy to your tax return for the year of exercise
4. Risk: If you leave the company and the shares are repurchased (forfeited), you cannot recover the tax you paid on the 83(b) election. You get no deduction for the forfeiture.

### When It Makes Sense

• Early-stage startup with a low FMV (409A valuation close to the strike price)
• You are confident you will stay through vesting
• The potential upside is significant, and you want future gains taxed at capital gains rates

### When to Avoid It

• The spread at exercise is large (you would owe significant tax immediately)
• There is a real risk of forfeiture (you may leave the company)
• The stock is publicly traded and already priced at market (no discount)

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The Alternative Minimum Tax (AMT) is a parallel tax system that catches items with preferential treatment under the regular tax code. For NRIs with ISOs, the AMT is the primary risk.

### How AMT Works with ISOs

When you exercise ISOs and hold the shares (no same-day sale), the spread is added to your AMT income on Form 6251. You then calculate your tax under both the regular system and the AMT system, and pay the higher of the two.

2025 AMT exemption amounts:

The AMT rate is 26% on the first $239,100 of AMT income above the exemption (MFJ), and 28% on amounts above that.

### The AMT Credit

If you pay AMT due to ISO exercises, you generate an AMT credit (Form 8801) that can offset regular tax in future years. The credit is recovered when you sell the shares (because the sale triggers regular income tax, eliminating the AMT preference item). However, the credit recovery can take multiple years, creating a cash flow burden.

### Planning Strategy

• Limit ISO exercises in any single year to keep the spread below your AMT exemption
• Consider a same-day sale or disqualifying disposition for a portion of your ISOs to avoid AMT entirely (though you lose the long-term capital gains benefit)
• Model the AMT impact before year-end so you can make informed decisions about how many ISOs to exercise

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When an NRI relocates between the US and India during a period in which RSUs are vesting, the tax treatment becomes genuinely complex. Both countries may claim the right to tax the same RSU income.

### The Allocation Principle

The IRS and Indian tax authorities generally allocate RSU income based on where you performed the services during the vesting period — not where you were on the vest date.

Example: You receive an RSU grant on January 1, 2023, with a 4-year vesting schedule (25% vests each January 1). You work in the US from January 2023 through June 2025 (30 months), then move to India in July 2025. When the third tranche vests on January 1, 2025, you were in the US for the entire service period — 100% is US-sourced.

When the fourth tranche vests on January 1, 2026, you worked 30 months in the US and 6 months in India during the 36-month service period leading up to the vest. The US-sourced portion is 30/36 = 83.3%; the India-sourced portion is 6/36 = 16.7%.

### DTAA Treatment

Under the US-India DTAA:

• Article 16 (Dependent Personal Services): Salary and employment income (including RSU vest income) is taxable in the country where the services are performed.
• Foreign Tax Credit: If both countries tax the same RSU income, you claim a Foreign Tax Credit in one country for taxes paid to the other. Typically, you pay tax first in the source country (where you worked) and claim the credit in your country of residence.

### Common Mistakes When Relocating

1. Not filing a US return after departure: If RSUs vest after you leave the US but relate to US-service periods, the US-sourced portion is still taxable. You must file a Form 1040-NR.
2. Not adjusting cost basis in India: When you report RSU income in India, the cost basis for capital gains purposes should be the FMV at vest (converted to INR). Failure to adjust creates double taxation.
3. Ignoring state tax sourcing: California, New York, and other states may claim the right to tax the US-work portion of RSU income even after you leave the US.

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Based on thousands of NRI tax returns, these are the errors we see most frequently:

### Mistake 1: Not Adjusting 1099-B Cost Basis

As discussed in Section 2, reporting a $0 cost basis on Schedule D results in double taxation. This single error costs the average NRI tech professional $3,000-$15,000 in overpaid taxes.

### Mistake 2: Missing Supplemental W-2 Income

Some employers issue a separate supplemental W-2 for RSU and stock option income. If you miss this W-2 or your tax preparer does not include it, you will underreport income — and the IRS will send a CP2000 notice.

### Mistake 3: Not Tracking Sell-to-Cover Transactions

When RSUs vest, your employer typically sells a portion of shares to cover withholding (sell-to-cover). These sales generate a 1099-B even though the proceeds went directly to taxes. If you do not report them (with the correct cost basis), you will receive an IRS notice for unreported income.

### Mistake 4: Confusing Grant Date with Vest Date

RSUs are not taxable at grant. The taxable event is vesting. Using the grant-date stock price as your cost basis is incorrect.

### Mistake 5: Ignoring State Tax on Equity After Relocation

As noted above, states like California source RSU income to the state where the services were performed. Moving to a no-tax state does not eliminate California's claim on RSU income earned during your California residency.

### Mistake 6: Not Filing Form 3921 (ISOs) or Form 3922 (ESPPs)

Your employer should provide Form 3921 for ISO exercises and Form 3922 for ESPP purchases. These forms contain the information you need to calculate your tax correctly. If you do not receive them, request them from your employer's stock plan administrator.

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### Are RSUs taxed at vesting or at sale?

RSUs are taxed at both events, but differently. At vesting, the fair market value is ordinary income (reported on W-2). At sale, the difference between sale price and vest-date FMV is a capital gain or loss.

### Do I pay tax on RSUs if I never sell the shares?

Yes. You owe ordinary income tax when RSUs vest, regardless of whether you sell. Your employer withholds taxes at vesting by selling a portion of shares (sell-to-cover) or through payroll withholding.

### What is the difference between ISO and NQSO for tax purposes?

NQSOs are taxed as ordinary income at exercise. ISOs are not taxed at exercise for regular income tax, but the spread is subject to the Alternative Minimum Tax. ISOs that meet the holding period requirements are taxed entirely as long-term capital gains at sale.

### Can I make a Section 83(b) election on RSUs?

Generally, no. The 83(b) election applies to restricted stock and early-exercised options — not RSUs. RSUs are a promise to deliver shares in the future; since no property is transferred at grant, there is nothing to elect on. Some companies offer early-settlement RSUs that may qualify, but this is uncommon.

### How are RSUs taxed if I move from the US to India mid-vesting?

The RSU income is allocated between the US and India based on the proportion of the vesting period you spent working in each country. Both countries may tax their respective portions, and you claim a Foreign Tax Credit to avoid double taxation under the US-India DTAA.

### Do I need to report RSU income on my Indian tax return?

If you are a tax resident of India (or a Resident and Ordinarily Resident / Resident but Not Ordinarily Resident), you must report worldwide income including US RSU vesting income. You can claim a credit for US taxes paid under Section 90 of the Income Tax Act (DTAA relief) or Section 91 (unilateral relief).

### What is the tax rate on RSU income?

At vesting, RSU income is taxed at your ordinary income rate — up to 37% federal for 2025, plus state tax and FICA. At sale, the rate depends on your holding period: short-term gains (held less than 1 year after vest) are taxed at ordinary rates; long-term gains are taxed at 0%, 15%, or 20% plus the 3.8% Net Investment Income Tax if applicable.

### Should I sell RSUs immediately at vest or hold?

This is a financial planning decision, not purely a tax question. Selling immediately locks in your ordinary income tax and avoids further stock price risk. Holding gives you the opportunity for long-term capital gains treatment (lower rates) but exposes you to the risk of the stock declining. Many financial advisors recommend selling at vest and diversifying, especially if a large portion of your net worth is already tied to your employer through salary and unvested equity.

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