Swiss Banking Secrecy: The Myth, the Law and What’s Left of It

Swiss banking secrecy was born in a police raid. On 27 October 1932, French officers searched the Paris offices of a bank from Basel. They found what they were looking for: lists of around 1,000 French clients with money hidden in Switzerland. Among them were members of parliament, bishops, industrialists and newspaper owners.

Paris was scandalised. Basel and Bern were alarmed. Just over two years later, Switzerland passed a federal law that made it a crime for a banker to reveal a client’s secrets.

Notice what’s missing from that story. There are no Jewish refugees, no Gestapo agents and no heroic bankers. Those details came later, as part of a myth. The real history is less noble, and far more interesting. For 75 years, Swiss banking secrecy made Switzerland the world’s most famous hiding place for money. Then, between 2008 and 2018, it fell apart, at least for foreigners.

Yet it isn’t quite dead. Swiss banking secrecy has simply changed sides. It no longer protects foreigners from their tax offices, but it still protects the Swiss from theirs. It can still land a journalist in court, too. Here’s the whole story, from the raid in Paris to the fall of Credit Suisse.

What Swiss banking secrecy actually means

Let’s start with a common misunderstanding. Swiss banking secrecy isn’t a right that clients buy. It’s a duty that bankers carry, a bit like a doctor’s duty of confidentiality.

The key rule sits in Article 47 of the Swiss Banking Act. It says that bank employees, managers and auditors who reveal secrets entrusted to them can be punished. Clients can release their bank from that duty, and courts can lift it. Otherwise, a banker who talks risks a criminal record.

A very Swiss idea of privacy

Behind the law sits a cultural instinct. Many Swiss people consider money a private matter, much like health or religion. Colleagues rarely discuss salaries, and asking a neighbour about their savings would be rude. Swiss banking secrecy grew out of that instinct, and then turned it into a business.

1932: the raid that started it all

To understand the raid, you have to look at Europe after World War I. Governments were deeply in debt and raised taxes sharply. Wealthy families looked for ways around them, and Switzerland, neutral, stable and next door, was the obvious choice. According to the historian Sébastien Guex, Swiss banks were already advertising their discretion to foreign clients before 1914.

How the scheme worked

The Basel bank's Paris office ran a simple service. Clients kept their shares and bonds in Basel, and the bank paid them their interest and dividends discreetly in Paris. As a result, the French tax office never saw the income. Estimates of the taxes dodged ran to 1 or 2 billion French francs of the time.

When the lists came out, France demanded answers. However, the case fizzled out in court. Only a few clients were ever convicted, and the bank's Paris managers later received suspended sentences and an amnesty.

The Banking Act of 1934

Meanwhile, Switzerland was dealing with its own banking crisis. Several banks had lost heavily in Germany during the Depression and needed help. The new Banking Act of 1934 did two things at once. It put banks under federal supervision for the first time, and Article 47 turned banking secrecy into a criminal matter. The law came into force on 1 March 1935.

The Nazi myth, and why it stuck

For decades, Swiss bankers told a moving story. The law of 1934, they said, was written to stop Gestapo agents from tracking down the savings of German Jews. It's a powerful image, and it still appears in books and films.

There's just one problem. Historians have found no trace of that motive in the debates of the time. According to research summarised by Swissinfo, the story was invented in the 1960s, when Swiss banks needed a moral defence against growing pressure from the United States.

There is a grain of truth in the background. Nazi Germany did make hiding money abroad a serious crime, and from 1936 it could even carry the death penalty. Some persecuted families did keep savings in Swiss banks.

Secrecy turned against the victims

The bitter irony came after the war. When survivors and heirs tried to recover money from accounts of murdered relatives, many Swiss banks hid behind secrecy and red tape. They asked for death certificates that the camps had never issued. The scandal over these dormant accounts exploded in the 1990s. In August 1998, the banks agreed to pay $1.25 billion in a global settlement. Our article on Switzerland and Nazi gold tells the wider story of those years.

Numbered accounts: the James Bond myth

Thanks to spy films, many people imagine a Swiss account as a number with no name attached. You whisper a code, and the money is yours, no questions asked.

That's never been how it worked. A numbered account simply replaces the client's name with a code in the bank's everyday systems. Only a handful of senior staff know who owns it. However, the bank itself always knows exactly who you are. Since 1977, Swiss banks have also been bound by a formal agreement to check every client's identity. Truly anonymous accounts don't exist in Switzerland.

Chiasso, Marcos and the first cracks

The 1977 agreement wasn't a coincidence. That same year, a scandal shook the country. In Chiasso, on the Italian border, a branch of the Schweizerische Kreditanstalt, today's Credit Suisse, was caught secretly channelling Italian clients' money into a company in neighbouring Liechtenstein. It left a hole of more than CHF 2 billion in the bank's hidden commitments. Shocked Swiss bankers rushed to show that they could police themselves.

Swiss voters keep the secret

Next came politics. The Social Democrats launched a popular initiative against the abuse of banking secrecy. In May 1984, voters rejected it by 73%. It's a reminder that, in a country of direct democracy, Swiss banking secrecy survived for so long partly because many Swiss people wanted it to.

Dictators' money

Still, the mood was changing. In March 1986, Switzerland froze the assets of Ferdinand Marcos, the ousted dictator of the Philippines. In 1990, money laundering became a crime. From 1998, banks had to report suspicious money to the authorities. In 1999, Switzerland froze hundreds of millions linked to Nigeria's former ruler Sani Abacha.

Slowly, a Swiss line took shape. Criminal money wasn't welcome anymore. Untaxed money, on the other hand, still was. Under Swiss law, simply not declaring income was a tax offence, not a crime, so Switzerland refused to help foreign tax offices chase it.

2008: the whistleblower and the fall

That line held until an American banker in Geneva decided to talk. Bradley Birkenfeld had worked for UBS, helping wealthy Americans hide money from the US tax authority. In one famous episode, he admitted smuggling diamonds for a client in a toothpaste tube. In 2007, he took his story to the US authorities.

UBS gives in

The timing couldn't have been worse for UBS. In autumn 2008, the financial crisis forced the Swiss government and the Swiss National Bank to rescue it. A few months later, in February 2009, UBS agreed to pay $780 million to settle the US case. Even more shocking, the Swiss financial regulator, FINMA, itself handed the names of about 250 American clients to the US authorities.

13 March 2009

The dam had broken. On 13 March 2009, the Swiss government announced that it would adopt the OECD standard on tax information. From then on, Switzerland would help foreign tax offices on request, even in cases of simple tax evasion. Many Swiss commentators called it the end of Swiss banking secrecy.

The end of a 272-year-old bank

Some banks learned the lesson too late. Wegelin & Co., founded in St. Gallen in 1741, had picked up American clients that UBS no longer wanted. In January 2013, it pleaded guilty in a New York court. Shortly afterwards, the bank, often described as Switzerland's oldest, closed for good.

2018: when the data started to flow

The final blow came quietly. Switzerland signed up to the OECD's automatic exchange of information, and the legal basis took effect on 1 January 2017. In autumn 2018, the first data went out.

Now, every year, Swiss banks report foreign clients' account details to the Swiss tax authority. It then forwards them to the client's home country. That includes names, addresses, account balances and income. Today, more than 100 countries and territories take part.

So what's still secret? It depends on who you are. Pick your situation below.

Where Swiss banking secrecy survives

As the tool shows, Swiss banking secrecy is very much alive in two places.

At home, for the Swiss

Swiss residents still enjoy strong protection from their own tax office. In ordinary tax matters, the tax authorities of the 26 cantons can't simply ask a bank for a client's records. Instead, Switzerland relies on a clever trick. It deducts a 35% withholding tax on Swiss interest and dividends. Residents get that money back only if they declare their accounts. In effect, honesty pays.

Against journalists

The second place is more controversial. In 2015, Parliament tightened Article 47. Now, anyone who passes on or publishes leaked client data can be punished, not just the banker who leaked it. The maximum sentence is three years in prison, or five if someone profits.

In February 2022, an international team of journalists published "Suisse Secrets", based on leaked data on more than 18,000 Credit Suisse accounts. Major Swiss media stayed out of the project for fear of prosecution. Irene Khan, the UN's special rapporteur on freedom of expression, criticised the law. Even so, in May 2022 a parliamentary committee decided not to change it.

Credit Suisse: the end of an era

On 19 March 2023, the end came for the bank that Alfred Escher had founded in 1856 to finance Swiss railways. After years of scandals and losses, the government announced that UBS would take over Credit Suisse in an emergency rescue. The deal was completed that June. Secrecy didn't cause the collapse. Still, the fall of one of the two giants of Paradeplatz felt like the closing scene of a long story.

Escher's bank once paid for tunnels through the Alps, including the one you can read about in our guide to the Gotthard Base Tunnel. Ninety years later, it had become a symbol of discreet wealth. In the end, it couldn't survive a world where money had lost its hiding places.

Swiss banking secrecy: a timeline

Tap through the key moments in the rise and fall of Swiss banking secrecy. For the bigger picture, see our Swiss history timeline.

Quiz: fact or myth?

Do you know a numbered account from a myth? Six quick questions will tell.

What the secret says about Switzerland

It would be easy to tell this story as a simple morality tale, with greedy bankers on one side and honest tax collectors on the other. The truth is messier. Swiss banking secrecy grew out of a real Swiss love of privacy. It also grew out of a business model that helped the rich of other countries dodge the taxes their neighbours paid.

Switzerland gave it up the way it has often changed course: slowly, reluctantly and only under heavy outside pressure. You'll see the same pattern in the history of Swiss neutrality, and in the Cold War scandal around Crypto AG, another Swiss secret that turned out to serve foreign interests.

Banks also explain only part of Swiss prosperity, as our guide to why Switzerland is so rich shows. Pharma, watches and engineering matter far more.

And the lists from that Paris office in 1932? Today, nobody needs to raid an office to find them. The information travels by itself, every autumn, from Swiss servers to tax offices across the world.

FAQ: Swiss banking secrecy