Foreign RSU tax guide for US expats: how RSU tax works when living abroad in 2026

Written by  Andrew Coleman, CPA

Last updated Jun 12, 2026

RSUs are taxed as ordinary income at vesting – federal rates up to 37%, plus 7.65% FICA – and any post-vest gain is taxed separately as a capital gain.

When your restricted stock units vest, the full market value is added to your wages. Your employer withholds at the 22% (up to $1 million) federal supplemental wage rate, or 37% (above $1 million) on vesting income above $1 million (2025). That flat rate often falls short of what you actually owe, which is where most RSU tax problems begin.

The following six facts cover how RSU taxes work at a glance:

• RSU income is taxed across two points in its life: once as ordinary income when the shares vest, and again as a capital gain or loss when you sell.
• The vesting-date value becomes your cost basis, which is the figure you must use to avoid being taxed twice on the same amount.
• Default withholding is 22%, or 37% on the part above $1 million, which is frequently lower than an expat's true marginal rate.
• RSUs are not exempt from FICA. Social Security applies up to the $176,100 wage base (2025), and Medicare applies with no cap.
• Living abroad does not remove the US tax, but the foreign tax credit and, in some cases, the Foreign Earned Income Exclusion can prevent double taxation.
• Vested shares held in a foreign brokerage account can trigger FBAR and Form 8938 reporting.

For US expat equity compensation, timing matters as much as the rules. You can review our guide to timing your RSU vesting for the planning side, which is where careful choices often save the most.

The IRS treats equity pay differently from a cash bonus. Read the IRS overview of stock options for how the agency frames stock-based compensation, then use the sections below for the RSU-specific detail and the expat-specific rules that generic tax software tends to miss.

What are RSUs? Definition and how they work

A restricted stock unit (RSU) is a promise by an employer to deliver company shares once vesting conditions, typically time-based or performance-based, are met. You owe no tax at grant. Tax is triggered only when the shares are delivered, usually at vesting, and the full market value is then treated as ordinary income.

An RSU moves through three dates that determine the tax:

1. Grant date. You receive the RSUs as a promise. No shares change hands, so no tax is due.
2. Vesting date. The conditions are met, and the shares are delivered. The market value on this date is taxed as ordinary income, and that same value becomes your cost basis.
3. Sale date. You sell the shares. Any change in value since vesting is a capital gain or loss.

Under section 83(a) of the tax code, property you receive for your work is taxed once it is no longer at risk of forfeiture, which, for an RSU, is the delivery date. This is the foundation of RSU tax treatment.

Because no shares exist at grant, RSUs generally cannot use the section 83(b) election that lets holders of actual restricted stock pay tax up front. See the IRS sample 83(b) election language in Revenue Procedure 2012-29, which applies to the awards that do qualify, and note that the IRS introduced Form 15620 in late 2024 for making that election.

How are RSUs taxed? The two-stage tax event explained

RSU taxation happens in two distinct stages: ordinary income tax at vesting, and capital gains tax when you sell. The first stage usually carries the larger bill, since the entire vesting-date value is taxed at rates that reach 37% (2025).

So, how are RSUs taxed at each stage? The mechanics break down as follows:

1. At vesting. The fair market value of the shares is ordinary income, taxed at your regular rate and subject to FICA.
2. At sale. Only the change in price since vesting is taxed. A gain is a capital gain, and a drop is a capital loss.

Based on our client scenario at TFX: 100 shares vest when the stock trades at $50, so $5,000 is added to your wages as ordinary income and becomes your cost basis. You hold the shares and sell 14 months later at $60. The $1,000 difference, or 100 shares times $10, is a long-term capital gain taxed separately at 0%, 15%, or 20% (2025).

The split between the two stages is why taxes on RSU income confuse so many people. The vesting value is compensation, while the latter gain is investment income with its own rules. Any gain after vesting is a capital gain; see our guide to capital gains tax for expats for how the sale side works when you live abroad.

RSU tax rates: ordinary income and capital gains breakdown for 2025

The RSU tax rate at vesting matches your ordinary income bracket, up to 37% federally, making RSU income among the most heavily taxed forms of compensation. Short-term gains on shares sold within a year of vesting are taxed at those same rates, while shares held longer get the preferential 0%, 15%, or 20% long-term rates.

Your RSU stock tax rate at vesting is simply your ordinary income rate, so a vest stacked on top of salary is often taxed at a higher bracket than your base pay.

The table below shows the 2025 federal ordinary income tax brackets that apply to RSU vesting income and to short-term gains, which are taxed identically.

The next table shows the 2025 long-term capital gains rates that apply to RSU shares held more than 12 months after vesting.

Understand the current brackets in the IRS topic on capital gains and losses, which the agency updates each year for inflation.

RSU tax withholding: how employers withhold and what it means for you

The default IRS supplemental wage rate for RSUs is 22%, but your actual RSU tax can be much higher once your total income is counted. On vesting income above $1 million in a year, the rate jumps to 37% (2025).

Employers use one of the following four methods to cover the tax when your RSUs vest:

1. Sell-to-cover. The broker sells enough vested shares to pay the withholding and delivers the rest to you. This is the most common default.
2. Net issuance, or share withholding. The company keeps a portion of the shares and issues you the remainder, using the withheld shares to pay the tax.
3. Same-day sale. All vested shares are sold at vesting, and the tax comes out of the proceeds.
4. Cash payment. You pay the withholding from your own funds and keep all the shares.

The gap between the 22% supplemental wage rate for RSUs and your real bracket is the core risk. If your marginal rate is 32% or 35%, the RSU taxes withheld at 22% leave a shortfall you settle at filing.

To avoid an underpayment penalty, you may need to make quarterly estimated payments on Form 1040-ES, especially in a year with a large vest. Under-withholding on RSU stock tax withholding is one of the most common surprises we see.

Your RSU income shows up in Box 1 of your W-2 as wages, and many employers also flag the amount in Box 14 with the label RSU. Box 12 code V, by contrast, reports nonqualified stock option income, not RSUs, so do not expect your RSU value there. You can review the withholding rules in IRS Publication 15 (Circular E) for the supplemental wage details.

FICA taxes on RSUs: Social Security and Medicare at vesting

RSUs are subject to FICA taxes at vesting: 6.2% Social Security up to the $176,100 wage base (2025), 1.45% Medicare, and a 0.9% Additional Medicare Tax once income passes $200,000 single or $250,000 married. The Social Security cap means a maximum of $10,918.20 in Social Security tax across all your wages for the year.

So, are RSUs FICA exempt? They are not. There is no rule that makes an RSU FICA exempt, and the RSU FICA tax applies at the same vesting moment as the income tax.

Whether RSUs are subject to FICA when you work abroad depends on where you are covered. A totalization agreement between the US and your host country decides which country's social security system you pay into. With a Certificate of Coverage, the portion of your RSU income tied to a foreign assignment may be outside the US system, so the social security tax on RSU income earned abroad can be reduced or eliminated. The same logic affects the Medicare tax on RSU foreign income.

The US has totalization agreements with around 30 countries, including Germany, the United Kingdom, Canada, Japan, and Australia. A totalization agreement and RSU planning often work together for assignees who split a vesting period across borders. These rates change periodically; read the IRS overview of Social Security and Medicare withholding rates for the latest figures.

RSU double tax: how to avoid paying tax twice on the same income

RSU double taxation most often occurs when investors fail to use the vesting-date FMV as their cost basis on Form 8949, causing them to pay tax on income already reported on their W-2. The other common version hits expats: foreign tax on the vesting income, then US tax on the same income.

RSU double tax shows up in two scenarios:

• Cost basis error. Your employer already reported the vesting value in Box 1 of your W-2. If you then report the full sale proceeds without raising your cost basis to the vesting-date value, you pay capital gains tax a second time on money already taxed as wages.
• Cross-border overlap. A foreign government taxes the vesting income, and the IRS taxes it too. The fix here is the foreign tax credit, covered in the next section.

If your shares are priced in another currency, the cost basis of RSU shares held in foreign currency must be converted to US dollars at the vesting-date exchange rate, which keeps both the income and the basis on the same footing.

How to report RSUs on your tax return: step-by-step for 2025

The most common RSU reporting mistake is leaving the cost basis on Form 8949 at the broker's figure, which double-taxes income you already paid tax on at vesting. The correction takes one adjustment column, but it changes the bill by hundreds or thousands of dollars.

Knowing how to report RSU income on your tax return comes down to the following four steps:

1. Confirm the income on your W-2. The vesting value should appear in Box 1 as wages. For an expat, check that the W-2 Box 14 RSU figure lines up with Box 1.
2. Collect Form 1099-B. Your broker issues this for any shares you sold during the year.
3. Report each sale and fix the basis. Enter sales on Form 8949 and adjust the cost basis to the vesting-date value. If your shares vested under a sell-to-cover arrangement, your RSU sell-to-cover tax reporting still flows through Form 8949 for the shares sold to pay the tax.
4. Claim foreign tax paid. If a foreign country taxes the vesting income, claim the credit on Form 1116.

The right RSU tax form depends on what happened during the year: usually a W-2 for U.S. payroll-reported vesting income, and Form 1099-B, Form 8949, and Schedule D for any sale. If no W-2 is issued, the income may still need to be reported; check the IRS page on Schedule D for the mechanics.

RSU taxation for US expats living abroad: key rules and exceptions

Living abroad does not exempt RSU income from US tax, but the Foreign Earned Income Exclusion and the foreign tax credit, used correctly, can keep the same income from being taxed twice. Three rules drive expat RSU taxation, and the dollar limits decide which tool fits.

The first rule concerns the Foreign Earned Income Exclusion and RSUs. RSU vesting income counts as foreign earned income to the extent it pays you for services performed in a foreign country during the vesting period. That portion can be excluded up to the annual limit of $130,000 (2025). The limit covers all of your foreign earned income combined, so a large vest stacked on salary usually runs past it, and the exclusion does not reduce FICA.

The second rule is the foreign tax credit. Foreign income tax you pay on the vesting income can be claimed on Form 1116, with no dollar cap, which makes it the more powerful tool for most expats with sizable awards. This is the heart of expatriate stock compensation planning.

The third rule is apportionment. When an RSU vests after you have worked in more than one country, the income is sourced by where you performed the services across the vesting period, so more than one country may tax the same award. Overseas RSU vesting almost always raises this question, covered in detail two sections down.

For RSU income while living abroad, the practical sequence is usually to apply the foreign tax credit first and treat the exclusion as a supporting tool, not the other way around.

Foreign tax credit on RSU income: eliminating double taxation for expats

The foreign tax credit on Form 1116 is the primary tool US expats use to eliminate RSU double taxation when the same vesting income is taxed by both a foreign government and the IRS. The credit is dollar-for-dollar, so $8,000 of foreign tax can offset up to $8,000 of US tax on that income.

The foreign tax credit on RSU income works inside the income category, or basket, that the income belongs to. RSU vesting income is general-category earned income, so the foreign tax you paid on it offsets US tax on income in that same basket, not on unrelated passive income.

Used this way, the credit is the cleanest RSU tax offset available to an expat, since it directly cancels the US liability on income a foreign country has already taxed. A double taxation treaty and RSU sourcing rules can also affect which country has the first claim, which feeds into how much credit you can use.

Multi-country RSU tax apportionment: when you worked in multiple countries during the vesting period

When RSUs vest after an international assignment, the IRS and most foreign tax authorities require you to apportion income based on where services were performed during the vesting period, not just your location on the vesting date. Errors here are a top audit trigger for expats, because two countries are often taxing slices of one award.

Multi-country RSU taxation follows a workday formula:

1. Count the days you worked in each country during the vesting period.
2. Divide the workdays in a given country by the total workdays performed anywhere during the applicable vesting period, unless a treaty or local rule requires a different method.
3. Multiply that fraction by the fair market value at vesting. The result is the income sourced to that country.

Based on our client scenario at TFX: an RSU grant vests over four years, or about 1,460 days. You worked 365 of those days in the US and the rest in Germany. If the award is worth $40,000 at vesting, then 365 divided by 1,460, or 25%, sources $10,000 to the US and $30,000 to Germany.

These principles track Article 15 of the OECD model treaty, which sources employment income to the place where the work is performed. An international assignment and RSU vesting that span the same period is exactly the situation Article 15 was written for, and getting the split right is what keeps the RSU withholding tax in each country from turning into double tax.

Got RSUs while living or working abroad? Let our expat CPAs handle it so the same income is not taxed twice.

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FBAR and Form 8938 reporting for RSUs and brokerage accounts abroad

If you hold vested RSU shares in a foreign brokerage account, you must file an FBAR (FinCEN Form 114) when your foreign accounts together top $10,000 at any point in the year, and the penalty for a non-willful failure runs up to $16,536 per report for 2025. A 2023 Supreme Court decision, Bittner v. United States, confirmed that non-willful penalties apply per report, not per account.

The reporting rules for FBAR and restricted stock units break down as follows:

• FBAR (FinCEN Form 114). Required if your foreign financial accounts, including a brokerage account holding vested RSU shares, exceed $10,000 combined at any time during the year.
• Form 8938. Required if your specified foreign financial assets exceed $200,000 on the last day of the year or $300,000 at any point, for single filers living abroad. The thresholds rise to $400,000 and $600,000 for married couples filing jointly abroad.
• Unvested RSUs. Generally not reportable on the FBAR, since you do not yet hold the shares, though they may factor into Form 8938 RSU reporting depending on the asset category.

The two filings go to different agencies: the FBAR to FinCEN and Form 8938 to the IRS with your return, and meeting one does not satisfy the other. If you file jointly, read our guide on whether your FBAR must include your spouse's accounts before you submit.

RSU capital gains tax: short-term vs. long-term holding periods

The holding period for long-term capital gains treatment on RSU shares begins on the vesting date, not the grant date, so you must hold shares for more than 12 months after vesting to qualify for the 0%, 15%, or 20% long-term rate. Sell inside that window, and the gain is short-term, taxed at ordinary rates up to 37% (2025).

Capital gains tax on RSU shares only ever applies to the change in value after vesting, because the vesting value was already taxed as wages. The RSU long-term capital gains tax rate is the same preferential rate that applies to any other long-held investment.

This is where the difference between capital gains tax and RSU ordinary income becomes a planning lever: the vesting bill is fixed, but the rate on the later gain depends on how long you wait.

Read our guide to capital gains tax on selling your home in the US and abroad for how the residence rules interact with investment gains.

Why are RSUs taxed so high? Understanding the effective RSU tax burden

RSUs feel heavily taxed because vesting income is added to your W-2 wages, potentially pushing your marginal federal rate to 37% while also triggering Social Security, Medicare, and state income taxes in the same tax year. The vest does not get its own low rate; it stacks on top of everything else you earn.

The reason the RSU taxing feels so steep is stacking. Your salary fills the lower brackets first, so the RSU income lands in your highest brackets and can pull part of your pay into the next one up.

Based on our client scenario at TFX, assume you are a single filer with a $120,000 salary and an $80,000 RSU vest in 2025, for $200,000 in total wages. After the $15,000 standard deduction, taxable income is $185,000. Using 2025 single brackets, that produces about $37,247 of federal income tax before credits and other adjustments, an effective federal income tax rate near 18.6%.

That is a combined federal burden near 25% before any state tax, and the $80,000 vest itself sits in the 24% bracket while pushing you toward the 32% bracket that starts at $197,300. Yet only 22% was withheld on the vest, which is why the RSU tax implications often arrive as a balance due rather than a refund.

Planning for an upcoming vest? See our RSU timing guide before your next vesting date.

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RSU tax planning strategies: timing, diversification, and expat elections

Expats who time RSU vesting to coincide with a year of foreign residency can potentially reduce their overall tax burden by applying the foreign tax credit to offset US tax on the same income. The four moves below are where most of the savings sit.

Four strategies do most of the work:

1. Defer the vest where your plan allows. Aligning a vest with a lower-income year can drop the income into a lower bracket.
2. Hold for more than 12 months after vesting. This converts the post-vest gain to long-term rates of 0%, 15%, or 20% (2025).
3. Donate appreciated shares. Giving long-held shares to charity can remove the capital gain entirely while supporting a deduction.
4. Coordinate vesting with relocation. For expats, lining up a vest with a foreign-residency year, while staying fully compliant, lets the foreign tax credit do more of the work.

Repatriation and RSU tax planning belong in the same conversation: a vest that lands the year you move back to the US is sourced and taxed differently from one that vests while you are still abroad. Several of these moves are covered in IRS Publication 525; see it for the income-type details.

Non-resident alien RSU withholding: rules for foreign employees of US companies

Non-resident aliens are taxed on RSUs from a US employer only on the share sourced to US workdays during the vesting period, and that portion is generally treated as wages subject to graduated withholding, not the flat 30% rate that applies to passive US income. A non-resident alien who never worked in the US during the vesting period generally owes no US tax on the award.

Non-resident alien RSU withholding starts with sourcing under section 861(a)(3): only the part of the vest tied to US workdays is US-source income. That US-source portion is wages, reported on Form W-2, with the value shown in boxes 1, 3, and 5 and often labeled in Box 14.

Because it is compensation for services, the US-source slice is withheld at graduated wage rates and reported by the recipient on Form 1040-NR, not at the 30% rate. A non-resident alien with no Social Security number applies for an ITIN to file.

Treaty relief, where a treaty offers it, is claimed on Form 8233 for this kind of personal-services compensation. The flat 30% withholding and Form W-8BEN apply to passive US-source income such as dividends, so they are not the right path for RSU wages.

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