America saved Eduardo Saverin — and he won’t repay the favor.

When he was 13, Saverin was named on a gangster’s list of potential kidnapping targets. His family fled Brazil to Miami for his safety.

Saverin thrived, attending a fancy prep school. He became a citizen in 1998, and made his way to Harvard, where he became pals with Mark Zuckerberg and the other founders of Facebook.

Now he’s shunning the United States — the place that gave him personal safety, along with immense opportunity and wealth — by stiffing us for a possible $600 million in taxes.

He’s renouncing his US citizenship in favor of Singapore, the Southeast Asian city-state that has no capital-gains tax, where he has lived like royalty since 2009.

The move already has saved him about $288 million in taxes, and will save him much more if he chooses to sell his $4 billion personal stake in Facebook, which goes public next week.

“This pisses me off,” fellow tech-industry billionaire Mark Cuban spat on Twitter Friday upon hearing news of Saverin’s decision.

Saverin’s spokesman has defended the move, claiming he has investments in the Far East, and Europe and the permanent move makes perfect sense.

“Eduardo recently found it more practical to become a resident of Singapore since he plans to live there for an indefinite period of time,” Saverin’s spokesman told Bloomberg — spinning the move as less of a tax dodge and more of a business opportunity.

Saverin, 30, is among the most mysterious of Facebook’s four founders, and may best be remembered as the laptop-freakout guy Andrew Garfield played in Aaron Sorkin’s Facebook film “The Social Network.”

At Harvard, he wore business suits to class. Leveraging his family’s deep business links, Saverin was still an undergraduate when he took advantage of Brazil’s lax insider-trading rules to make $300,000 through strategic investments in the oil industry.

Around the same time, he fronted Zuckerberg the cash to launch the fledgling social network, and was the company’s first CFO.

Soon after, Saverin and Zuckerberg had a falling out, and he was squeezed out of Facebook.

Following a court battle, his stake in the Internet juggernaut was diluted from 34 percent to less than 10 percent.

Today, after more dilution and sales of some of his shares, his stake is about 2 percent, according to the Wall Street Journal.

Saverin lives like a rock star in a sprawling penthouse atop Singapore’s tallest building.

He is regularly spotted lounging with models and wealthy friends at local nightclubs and racking up tens of thousands of dollars in bar tabs by ordering bottles of Cristal Champagne and Belvedere vodka.

His lifestyle is so over-the-top, the billionaire — famed for canceling interviews and speaking engagements at the last minute via text message — attracts the same kind of attention lavished on the Kardashian family in the US.

Despite his accomplishments, it is Saverin’s willingness to trade his US citizenship like a baseball card that has gained him worldwide attention — and scorn.

Saverin’s $avings

After renouncing US citizenship:

* Stake in Facebook: $4 billion

* What he paid government as “exit tax” in September: $220 million

* What he’s saved on capital-gains valuation since: $288 million

* Total taxes Saverin would have owed US after Facebook goes public: Up to $600 million.