Exit Tax Explained: What the IRS Takes When You Leave

On the day you renounce US citizenship, the IRS imagines you sold everything you own. Your house. Your investment portfolio. Your stake in a family business. Your retirement accounts. All of it — deemed sold at fair market value on the day before you expatriate. And then they send you a tax bill on the gains.

This is the mark-to-market exit tax, and it is the single largest financial consideration for most people thinking about surrendering their US citizenship. The renunciation fee is a flat $450 (reduced from $2,350 in April 2026) and very manageable. The exit tax can, for the right (wrong?) person, run into hundreds of thousands of dollars.

The good news: most people who renounce are not affected. The exit tax only applies to covered expatriates, and the definition of “covered” has specific thresholds. The bad news: if you are covered, the math gets serious, and the planning window matters enormously.

What Is a Covered Expatriate?

Covered expatriate status is triggered by meeting any one of three tests. You need only fail one test to be covered — you don’t need to fail all three.

Test 1 — Income test: Your average annual net US income tax liability over the five tax years ending before expatriation exceeds $211,000 (2026 threshold, inflation-adjusted annually). This is net income tax paid, not gross income. In rough terms, if you were paying more than $211,000 per year in US taxes on average over the past five years, you’re covered.

Test 2 — Net worth test: Your net worth is $2,000,000 or more on the date of expatriation. This is a statutory threshold — no inflation adjustment. Two million dollars and you’re covered, full stop.

Test 3 — Certification test: You fail to certify, under penalty of perjury, that you’ve been compliant with all US federal tax obligations for the five years preceding expatriation. This one is different from the others: it’s not about your wealth or income. If you haven’t filed required tax returns, haven’t paid taxes owed, or haven’t filed required FBARs during those five years, you can be classified as a covered expatriate purely for non-compliance — regardless of how little you have.

The certification is made on Form 8854. If you’ve been delinquent on any filings, you need to get current before you expatriate. This is why you’ll also need to be current on all FBAR filings — see FBAR Filing 2026 for what that entails.

How the Exit Tax Actually Works

If you’re a covered expatriate, you’re treated as having sold all your worldwide assets at fair market value on the day before your expatriation date. Gains above the exclusion amount are taxable.

The 2026 exclusion: $910,000. Any gain up to $910,000 is excluded from taxation. Gains above that threshold are taxed as if you recognized them — generally at capital gains rates, though some assets have special rules.

Let me make this concrete with an example.

Suppose you have a $2.5 million investment portfolio. Your cost basis across the portfolio is $1.8 million. Your total unrealized gain is $700,000. Since $700,000 is below the $910,000 exclusion, you owe zero exit tax on this portfolio, even as a covered expatriate.

Now change the scenario slightly: same $2.5 million portfolio, but your basis is $1.2 million. Unrealized gain: $1.3 million. Applying the $910,000 exclusion leaves $390,000 in taxable gain. At a long-term capital gains rate of roughly 20% (plus the 3.8% net investment income tax), you’re looking at approximately $93,000 in exit tax on this portfolio alone.

Add a $500,000 gain on a rental property, a $200,000 unrealized gain in your brokerage account — it adds up. The exclusion applies once, across all your assets combined, not per asset.

Special Rules for Specific Assets

The exit tax treats most assets through the deemed sale framework, but some categories have their own rules:

Retirement accounts (IRAs, 401(k)s): There’s no deemed sale for IRAs. Instead, covered expatriates lose the ability to roll over or continue deferring those accounts in the normal way. Future distributions from IRAs are subject to a 30% withholding tax (unless reduced by treaty with your new country of residence). For large retirement accounts, this can be a substantial hidden cost of expatriation that the simple deemed sale calculation misses.

Deferred compensation: Vested deferred compensation (stock options, restricted stock units, pension benefits) is generally taxed at the date of expatriation as if paid out, subject to 30% withholding by the payer (if a US company). Unvested deferred compensation is taxed when it vests, treated as if received by a non-resident alien.

Interests in non-grantor trusts: These have their own complex rules. If you’re a trust beneficiary and you expatriate as a covered expatriate, future distributions from those trusts may be subject to 30% withholding.

Interests in partnerships, S-corps, and closely held businesses: The deemed sale applies here too, which means you may need a professional valuation of your ownership stake on the date of expatriation. For illiquid interests — a family business, for example — you’re on the hook for tax on unrealized gains in assets you can’t actually sell.

Form 8854: The Document That Matters

The exit tax is reported and paid on Form 8854 (Initial and Annual Expatriation Statement). You must file Form 8854 for the taxable year that includes your expatriation date.

Late or incomplete Form 8854 filing has its own penalty structure. If you fail to file or file incorrectly, the IRS can impose a $10,000 penalty per year. More importantly, if you fail to certify tax compliance for the five preceding years on Form 8854, you’re automatically classified as a covered expatriate — regardless of whether you otherwise would have been.

The due date is the same as your individual tax return for the year you expatriate. If you renounce in 2026, Form 8854 is due with your 2026 return (April 15, 2027, or with extension October 15, 2027).

The Planning Window: Before You Renounce

The exit tax calculation is made on your expatriation date — but your covered expatriate status is determined by your circumstances over the five years before you expatriate. This creates a planning window that matters a great deal.

Reducing net worth below $2 million: If you’re at $2.1 million and would be covered by the net worth test, gifting assets, contributing to an irrevocable trust, or similar strategies might bring you below the threshold before expatriation. This requires careful planning and has its own tax implications (gift tax, for instance).

Reducing unrealized gains: If you hold assets with large embedded gains, selling them before expatriation (and paying tax on the gains while still a US citizen at regular rates) can reduce the exit tax exposure. Whether this is actually better depends on your current tax rate vs. the exit tax rate — and the answer isn’t always obvious.

Increasing basis: Contributing appreciated stock to retirement accounts, using the lifetime gift tax exemption, or making charitable contributions of appreciated property can affect the exit tax calculation.

The five-year tax compliance window: You need five clean years of tax returns (and FBAR filings) before expatriating. If you’ve been delinquent, the clock starts when you get compliant — not when you decide to renounce.

My view on the exit tax as policy: it’s a blunt instrument. The intent is to prevent wealthy Americans from stripping their assets of embedded gains by renouncing citizenship — and for genuinely wealthy people with massive unrealized gains, that argument has some merit. But the $2,000,000 net worth threshold hasn’t been inflation-adjusted since 2008. Two million dollars is not what it was in 2008. In major cities, it doesn’t make you wealthy — it might just mean you own a house and have a reasonable retirement account. The exit tax hits middle-class-ish expats in expensive cities in ways Congress probably didn’t intend, and the political will to fix it seems approximately zero.

The full renunciation process is covered in Should You Renounce US Citizenship in 2026? — if you’re in the planning stage, that’s a useful companion to this piece.

The Practical Takeaway

Most people who renounce will not be covered expatriates. If your net worth is under $2,000,000, your average tax bill has been under $211,000 per year, and you’ve been filing your returns and FBARs correctly, you exit cleanly.

If you’re close to the thresholds — particularly the $2,000,000 net worth threshold — the planning window before expatriation is worth taking seriously. Use our Expat Cost Calculator to model your exit tax exposure alongside other renunciation costs. A one-time consultation with a tax attorney who specializes in expatriation is likely to pay for itself. The exit tax is not a reason not to renounce; it’s a reason to renounce at the right time, with your assets in the right structure, with your compliance record clean.

The deemed sale is imaginary. The tax bill is not.