The New Global Hunt for Tax Cheats

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The IRS argues that such cooperation is essential in a world of globalized money flows. "Cross-border migration of capital and people has made this a more integrated world, and the IRS is working closely with other national tax administrators to ensure that we have a global view of our work," says the top tax official in the U.S., IRS Commissioner Douglas Shulman. This close work with other tax authorities, he adds, has allowed the IRS and its equivalents in other nations to achieve "a new level of cooperation in identifying, developing, and sharing leads on abusive tax transactions and schemes."

Such cooperation will only increase as governments clamp down on tax evasion, says Daniel Feingold, senior partner at Britain-based global tax consultancy Strategic Tax Planning. "There's a definite push for this sort of thing," he says.

Squeezing Tax Havens

All of this has put the squeeze on tax havens such as Liechtenstein and Andorra that have long-held traditions and laws supporting no-questions-asked banking for wealthy clients. "The number of countries safe for this activity is dwindling," says Beverly Hills-based tax lawyer Edward Robbins Jr., a former assistant U.S. attorney who oversaw tax prosecutions in California. "There aren't that many left, frankly."

For decades, banks in places such as Switzerland have flourished by offering seemingly ideal havens from the tax man. Switzerland's code of silence, for instance, goes back at least 200 years. And during World War II, Nazis and Jews alike made use of Swiss bankers' discretion. Since then so have corporations and non-governmental organizations—as well as drug traffickers and corrupt dictators.

Yet even this Alpine paradise has conceded to mounting international pressure (BusinessWeek.com, 5/21/08). Most major Swiss banks have signed up with the U.S. to be "qualified intermediaries." The system gives the IRS access to any account containing U.S. securities and requires the filing of tax and other forms with the U.S. that identify clients and balances—not exactly the image of tight-lipped discretion portrayed in movies such as The Spanish Prisoner and The Bourne Identity. Even the Swiss government admits to a disconnect between tradition and current reality. "Swiss banking secrecy is in no way absolute," cautions the Swiss embassy's Web site.

Often under pressure, other tax havens have followed suit. Agreements with traditional ports-of-call for evaders like Malta and Bermuda have aided the IRS and its international counterparts. Now tax collectors don't even have to pick their way through complicated avoidance schemes: They can make a case against alleged tax cheats simply by catching missing or falsified paperwork.

Elaborate Web

Here's how it works. For years, a bank client with any kind of interest in an overseas account valued at more than $10,000 has had to file a special form with the IRS disclosing that fact. But to avoid taxation, he might not file the form, or might underreport the value of the account on his tax return. More deviously, he might conceal transactions in an elaborate web of trusts and holding companies. Now, thanks to more international sharing of data, the IRS may find out about the account anyway—from the bank itself.

The recent high-profile indictment of former UBS (UBS) banker Brad Birkenfeld shows just how tough the authorities are getting. Birkenfeld's wealthy client, Igor Olenicoff, has pleaded guilty to filing false tax returns and agreed to pay $52 million in back taxes. Both Olenicoff and Birkenfeld, who was born in Boston and lives in Switzerland, are believed to be cooperating in a continuing investigation that began with the discovery of $200 million allegedly concealed in European tax havens on behalf of Olenicoff, a Russian émigré-turned-California real estate developer.

As a result of that probe, the extended arm of U.S. law may reach not just other clients of Birkenfeld (and those of an alleged collaborator in Liechtenstein named Mario Staggl, who specializes in the intricacies of tax havens and trusts) but also other employees of UBS. "This is not an isolated incident," says David Schwedel, a Florida entrepreneur who is now an investment partner of Birkenfeld's. "He won't be the last banker called in for questioning. There will be a lot of bankers called into this. They're going after others at UBS and any U.S. individuals involved with the bank."

Alerted About the Risks

Kevin Packman, a Miami lawyer who represents taxpayers running afoul of the IRS, says he's amazed that even sophisticated CPAs with major corporate and individual clients seem unaware of the international push against money held offshore. Tax lawyers around the world tell of clients—often expatriates—who are becoming increasingly worried about being ensnared in the tightening net, thanks to publicity surrounding tax avoidance test cases in Europe and the U.S.

One lawyer tells of trying to alert a client in Argentina about the risks of failing to disclose information to authorities in the client's home country. Even so, the client persisted in wanting to keep income under wraps. But tax lawyers and wealth managers from Basel to Boston say the risks of doing so are rising. "It's obvious that there's a growing intolerance of tax avoidance in the Western world," says Ted Wilson, a senior consultant at Scorpio Partnership, a London-based strategic consultancy to those who advise wealthy clients.

Of course, when the cat is in Zurich or Malta, the mice will find other havens. Asset managers, tax lawyers, and investigators tell BusinessWeek that wealthy evaders are taking a closer look at new frontiers for concealment. One such nation is the Republic of Vanuatu, a tiny, tax-free South Pacific archipelago 1,000 miles from Australia. Local officials even promote their tax haven status to potential clients. "Attractions for the foreign investor" include "extensive secrecy protections," according to a Vanuatu business and taxation guide.

Wealthy individuals looking to evade taxes likely will always find ways to circumvent the law. Yet as enforcement finds new ways to share information, the number of prosecutions is expected to rise. That has put pressure on well-known tax havens, such as Liechtenstein, either to shape up or face the full brunt of global tax authorities. In fact, there are signs things are already changing. Says Strategic Tax Planning's Feingold: These days, "among experienced practitioners, no one would ever use Liechtenstein."

Epstein is a correspondent in BusinessWeek's Washington bureau. Scott is a reporter in BusinessWeek's London bureau .