Eight Months, Not Six

Eight months before Facebook's IPO made his stake worth roughly $2 billion, Eduardo Saverin walked into a US consulate and gave up his passport. The internet decided he'd dodged a tax bill. The internet was mostly wrong.

Saverin, a Facebook co-founder, had already relocated to Singapore in 2009. He renounced US citizenship in September 2011. Facebook went public on 18 May 2012, at a valuation near $100 billion. Do the arithmetic and the gap between the two events is eight months, not the six that circulated in early coverage — a distinction that matters, because the entire mechanism this story turns on is about precise timing relative to a specific appreciation event.

What the Exit Tax Actually Does

Here's the part the headlines skipped. Since 2008, US law has included what's informally called an exit tax — Section 877A of the tax code. It applies to "covered expatriates": people renouncing US citizenship with a net worth above $2 million, or income above certain thresholds. On the day before you expatriate, the IRS treats your worldwide assets as if you sold them. Not eventually. That day.

Saverin's Facebook stake was already substantial in September 2011 — months before the IPO, but well after the company's valuation had climbed steeply in private markets. That unrealized gain didn't escape US tax because he renounced. It was captured by the deemed sale, taxed at exit, in full.

What he legitimately avoided was US tax on everything that happened after: the IPO pop, the years of appreciation that followed. That's real money. It just isn't the "billions in taxes dodged" story that ran in 2012.

The Actual Trade

A covered expatriate gets an exclusion against the deemed gain — $910,000 for expatriations in 2026, adjusted for inflation most years — with tax due on anything above it. Retirement accounts, deferred compensation and non-grantor trusts each get their own, less forgiving treatment.

The lesson sits in the timing, not the act itself. Renounce after a fortune has already appreciated, and the exit tax bills you for that appreciation on your way out — you've paid for the privilege of avoiding tax on a gain you never actually escaped. Renounce before the appreciation happens, with the gain still unrealized and small, and the story changes completely. Saverin's timing worked because most of the value his Facebook shares would go on to accumulate was still ahead of him, not behind him.

None of this works without full modelling of the exit-tax cost, a secured second citizenship, and — this part rarely makes the listicles — genuine readiness for a permanent decision. Renunciation cannot be undone because a spreadsheet said it should be.

Who This Actually Suits

You don't need a Facebook-sized stake for the math to matter. Someone with modest current wealth but a founder's equity stake about to be worth a great deal more has, proportionally, more to gain from renouncing early than someone whose wealth has already been made and taxed. Plan before the growth, not after it — that ordering is the whole trick, and it's available to anyone with US citizenship and a credible second one.

Short of the full step, there are lighter versions: Puerto Rico's Act 60 preserves US citizenship while sheltering certain future income; careful structuring reduces the drag of citizenship-based taxation without severing it; treaty provisions and the foreign earned income exclusion do real, if smaller, work.

Before You Book Anything

A renunciation-timing review models the exit-tax cost against your specific asset base, checks that your second-citizenship position is genuine and secure, and tells you plainly whether the number even clears the bar. Bring your current net worth, your unrealized-gain positions, and your existing citizenship options; you'll leave with a figure, not a hunch.

This is general information about a well-documented public case, not personal tax or legal advice. Renunciation is a permanent, expensive decision, and it deserves its own dedicated consultation before anyone commits to it.