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The Biggest Blackjack Losses Ever Recorded, and What They Teach Every Player

By the BlackJack Streak team · · 8 min read

Blackjack has the smallest house edge in most casinos, and it has still produced some of the largest gambling losses ever reported. A Nebraska businessman lost more in one year than most companies earn. An Australian billionaire set a British record at the blackjack tables. A basketball legend lost $2.5 million in a single evening. Here is what the reporting actually says about each case, where the numbers are shaky, and the lesson underneath them all.

Before the list

No one keeps an official register of gambling losses. The figures below come from news reports, court cases and the players themselves, and casinos rarely confirm them. Where sources disagree, we give the range. Where a loss was mostly at another game, we say so.

1. Terrance Watanabe: between $127 million and $200 million in 2007

The largest loss widely reported for a single gambler in Las Vegas belongs to Terrance Watanabe, a Nebraska businessman and philanthropist who had built and then sold the mail-order company Oriental Trading Co.

In December 2009, ABC News reported that Watanabe said he bet more than $825 million during 2007 and lost nearly $127 million of it at Caesars Palace and the Rio, both then owned by Harrah's Entertainment. ABC called it what was "believed to be the biggest losing streak in Vegas history." In 2013, an Associated Press report on the case put his 2007 losses even higher, at "as much as $200 million."

The reports don't break that total down by game, so it's fairest to call it a casino loss in which high-stakes blackjack played a part, rather than a pure blackjack figure.

What followed was a long legal fight:

The number that should stop you cold

Here's the part that matters for every player. With perfect basic strategy at good rules, like the six-deck game at BlackJack Streak, blackjack's house edge is about 0.4%. On $825 million in bets, that edge would be expected to cost roughly $3.3 million. Watanabe reportedly lost around $127 million, about 15 cents of every dollar he bet.

The house edge alone can't explain a gap that size. Long sessions, other games, and decisions made under pressure can. In simulations we ran through BlackJack Streak's own rules engine, simply copying the dealer's style (hit until 17, never double or split) costs 5.6% of every bet, and random play costs nearly 43%. Blackjack is only a low-edge game when it's played well.

$825Mreportedly wagered by Watanabe in 2007
~$3.3Mexpected loss on that at a 0.4% edge
$127M+what he reportedly lost

2. Kerry Packer: a reported £11 million at Crockfords (1999)

Kerry Packer, the Australian media owner, was famous on both sides of the ledger. He had legendary wins (more on those in our article on the biggest blackjack wins in history), and he had legendary losses.

In September 1999, Packer reportedly lost about £11 million at Crockfords, the exclusive London club. A Reuters report from August 2000 described it as "a three-week losing streak last September at blackjack tables at London's Crockford's casino," put the figure at 16 million dollars, and called it "believed to be the biggest single loss in British gambling history." It overtook the previous British record of £8 million, also set at Crockfords.

The same Reuters report shows how quickly losses stacked up at that level. Packer reportedly lost at least $20 million in a three-day spree at the Bellagio in Las Vegas in July 2000, but that time at baccarat, his favorite game. In total he was believed to have lost up to $40 million in ten months.

3. Charles Barkley: $2.5 million in six hours (2006)

The basketball Hall of Famer has been unusually open about his gambling. In a February 2007 ESPN report, Barkley said he lost $2.5 million in a six-hour period in 2006. The Baltimore Sun later noted that "his game of choice is blackjack." Barkley also told ESPN he had lost "about $10 million" gambling over the years.

In 2008, Wynn Las Vegas sued him over $400,000 in unpaid gambling markers, according to the Sun. Barkley has spoken about his gambling openly in interviews, with the same candor that made him a favorite on television. His case is a reminder that big losses don't need a big streak. They need big bets, and a credit line to keep making them.

Losses run both ways: when the casino loses big

Casinos have record nights too. In April 2011, Don Johnson won $5.8 million from the Tropicana in Atlantic City in a roughly 12-hour session, described at the time as a record loss for the casino. He took about $15 million from three Atlantic City casinos in six months. The story of how he did it, by negotiating the rules before he sat down, is in our guide to famous blackjack players.

Even then, the casinos weren't simply unlucky. They had agreed to unusual terms to win a high roller's business, and when the results went the wrong way, they stopped offering them.

Why the biggest losses get so big

Look past the names and the same three forces show up in every story.

1. A small edge times an enormous amount of betting

The house edge is a percentage of everything you bet, not of what you bring. At about 0.4%, $10,000 a hand costs about $40 a hand on average. Play 100 hands an hour for ten hours and that's around $40,000 a day, even with perfect play. Multiply the bet size and the hours and the expected cost climbs fast, before a single bad decision.

2. Credit

Every big case above involves casino credit: markers, credit lines, money that was never in the player's pocket. Credit removes the natural stop that an empty wallet provides. Watanabe's and Barkley's legal disputes were both about markers.

3. Streaks and chasing

Losing streaks are a normal part of blackjack, and they are longer than most people expect. In 10 million rounds of perfect basic strategy that we simulated through BlackJack Streak's own rules engine, the longest losing streak was 20 rounds in a row. A player who raises their bets to "win it back" during a run like that turns an ordinary streak into a disaster. We dig into the numbers in the longest losing streak in blackjack.

0.4%house edge with perfect basic strategy
5.6%edge if you just copy the dealer
20longest losing streak in 10 million simulated rounds

The cheapest way to learn the lesson

Every story on this list ends the same way: real money, gone. You can learn everything those players learned, how streaks feel, how fast bet sizes add up, why the basic strategy chart matters, without any of it.

BlackJack Streak is free blackjack with play-money chips. You start with 500,000, the chips can't be bought or cashed out, and there's no deposit, no credit line and nothing to chase. Play a few hundred hands at BlackJack Streak, watch your stack swing, and you'll understand these headlines better than any article can explain them. If you're curious how much of blackjack is luck and how much is decision-making, read is blackjack luck or skill?, then test it at Frank's table.

If gambling has stopped being fun

If you or someone you know is gambling with money they can't afford to lose, talk to someone you trust and look up a gambling helpline in your country. Free play-money games like BlackJack Streak are entertainment only and never involve real money.

Sources

Questions people ask

What is the biggest blackjack loss ever recorded?

The largest reported casino loss involving high-stakes blackjack belongs to Terrance Watanabe, who said he lost nearly $127 million at Caesars Palace and the Rio in 2007; a later Associated Press report put it as high as $200 million. The reports do not break the total down by game.

How much did Charles Barkley lose at blackjack?

Barkley said he lost $2.5 million in a six-hour period in 2006, and The Baltimore Sun reported that blackjack is his game of choice. He has estimated his overall gambling losses at about $10 million.

Did Kerry Packer lose money playing blackjack?

Yes. Packer reportedly lost about 11 million pounds at Crockfords in London in September 1999, which Reuters described as a three-week losing streak at the blackjack tables and the biggest loss in British gambling history at the time.

How can people lose millions at blackjack if the house edge is so small?

The edge applies to every bet, so huge bets over many hours add up fast, and credit lines remove the natural stopping point. Playing worse than basic strategy also multiplies the edge: copying the dealer costs about 5.6% of every bet instead of about 0.4%.

Can you lose real money at BlackJack Streak?

No. BlackJack Streak is a free blackjack game with play-money chips. There are no deposits, the chips cannot be bought or cashed out, and there are no cash prizes.

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