High returns are not the test. Under the SEC's definition, modest returns paid out of the next investor's deposit make a Ponzi scheme, while high returns paid out of real earnings do not. It sits among the investment frauds in what fraud is.
How does a Ponzi scheme work? An example from first deposit to collapse
Picture a fund, invented for this example, that promises 2 percent a month and invests nothing.
Table 1. One illustrative Ponzi fund, stage by stage (numbers invented for the example).
| Stage | Money in | Money out | What investors see |
|---|---|---|---|
| 1. Initial recruitment | $1 million from 50 friends and club members | $20,000 a month, labeled returns | 2 percent, every month, on time |
| 2. Recycling new funds | $1.5 million from 75 newcomers | Early investors' payouts, paid from newcomers' cash | Proof that the strategy works |
| 3. Reinvestment and word of mouth growth | Most investors reinvest; their friends join | Little cash leaves; returns are credited on paper | Balances that grow on every statement |
| 4. Expansion phase | $4 million more in year two | Payouts and the operator's spending | A fund with no down months |
| 5. Collapse | New deposits slow | Withdrawal requests exceed the cash | Delays, excuses, then silence |
After two years the fund has taken $6.5 million from 325 investors. It has paid out about $2 million and the operator has kept $1.5 million, so the bank holds about $3 million while statements show more than $8 million. Withdrawal requests of $3.5 million end it.
The SEC describes the same mechanics: with little or no legitimate earnings, a Ponzi scheme needs a constant flow of new money and tends to collapse when recruiting gets hard or "large numbers of existing investors cash out".
From Ufuk Gürdaş, reviewer of this entry: "A Ponzi scheme shows up in its bank account before it shows up in the news: Madoff's 703 Account at JPMorgan fell from about $5.6 billion in August 2008 to about $234 million when he was arrested on 11 December 2008, and the bank was later charged for not filing a suspicious activity report that October."
What makes an investment a Ponzi scheme?
To define a Ponzi scheme, the SEC needs one sentence: "A Ponzi scheme is an investment fraud that pays existing investors with funds collected from new investors." Organizers often promise "high returns with little or no risk", and in many schemes the money is never invested. People also say Ponzi scam or Ponzi system. The meaning is the same.
Scott Rothstein's law firm sold investors fictitious confidential settlements. Charges allege its finance chief moved hundreds of millions of dollars from investors to pay prior investors (US Attorney, S.D. Florida, 16 April 2014).
Why is it called a Ponzi scheme? A short history
The name comes from Charles Ponzi, who "duped investors in the 1920s with a postage stamp speculation scheme", the SEC says. The FCA's page on Ponzi and pyramid schemes adds that he guaranteed US investors 50 percent, paid early investors with most of the money, and collapsed when new money stopped. Both name the fraud after him; neither says who ran the first one.
What's the difference between a Ponzi scheme and a pyramid scheme?
Table 2. Ponzi scheme and pyramid scheme compared (SEC, FCA, FTC and DOJ sources in the text).
| Ponzi scheme | Pyramid scheme | |
|---|---|---|
| Where payouts come from | New investors' money, presented as returns | New recruits' joining fees, paid out as commission for recruiting |
| What the victim does | Invests and waits | Pays to join, then recruits new participants |
| What is sold | An investment that is often never made | Little or no genuine product or service |
| Why it collapses | Recruiting gets hard or many investors cash out | Recruits run out: at six each, 11 layers need more people than the US population |
| DOJ example | Madoff, "$64 billion" | TelexFree, more than $3 billion taken from investors |
A pyramid scheme also runs on new money, but it turns each victim into a recruiter. The SEC's pyramid scheme hallmarks include recruiting, no genuine product or service, and high returns promised fast. The FTC is plain: "Pyramid schemes are scams," with income "based mostly on how many people you recruit."
TelexFree sold an internet phone service, yet over two years 98 percent of its revenue came from new people buying in. Its owners were charged with conspiracy to commit wire fraud in 2014; its president got six years in 2017.
What are the key characteristics and red flags of Ponzi schemes?
Many schemes share the SEC's seven red flags, the key characteristics to check:
- Promises of high returns with minimal risk. All investments carry risk; distrust unrealistic returns and anything "guaranteed".
- Consistent returns despite market fluctuations. Real investments go up and down.
- Unregistered investments. No SEC or state registration means a lack of verifiable financial oversight.
- Unlicensed sellers. Most Ponzi schemes use unlicensed individuals or unregistered firms: an absence of third party oversight.
- Complex or secretive strategies. Vague or unverified business models and complex structures that you cannot get full information on.
- Issues with paperwork. Statement errors may mean the money is not invested.
- Difficulty withdrawing funds. A missed payment, or higher returns offered for staying in.
How do you identify a Ponzi scheme from its paperwork and payments?
Start with registration: the SEC or a state regulator in the US, the FCA Firm Checker in the UK. Then ask who holds and audits the assets. In October 2008 JPMorgan's London due diligence team could not validate Madoff's trading or custody of assets and questioned his "odd choice" of a one person accounting firm.
Why do people fall for Ponzi schemes?
Usually through someone they trust. The SEC warns that fraudsters "exploit the trust derived from being members of a group that shares an affinity, such as a national, ethnic or religious affiliation" (investor alert, 23 July 2013). The FCA says a group's leaders may be targeted first, paid a high return, then promote the scheme before it collapses.
History's largest Ponzi schemes, from the court records
Table 3. Four of the largest US Ponzi schemes, in the DOJ's own figures.
| Operator | Size, in the DOJ's words | Outcome | Source |
|---|---|---|---|
| Bernie Madoff | "$64 billion securities fraud 'Ponzi' scheme" | Pleaded guilty to 11 federal felonies on 12 March 2009; 150 years | US Attorney, S.D.N.Y., 11 December 2023 |
| Allen Stanford | "$7 billion investment fraud scheme"; new CD sales paid depositors who redeemed | Convicted on 13 of 14 counts; 110 years | DOJ, 14 June 2012 |
| Tom Petters | "$1.9 billion Ponzi scheme" | Guilty on all 20 counts; 50 years; receivership closed with more than $722 million distributed to victims and creditors | US Attorney, D. Minnesota, 30 July 2021 |
| Scott Rothstein | "$1.2 billion Ponzi scheme" | His chief financial officer charged in 2014, the 18th accomplice | US Attorney, S.D. Florida, 16 April 2014 (linked above) |
Madoff's is "history's largest Ponzi scheme" in the DOJ's words. Over ten distributions the Madoff Victim Fund paid over $4.3 billion to 40,930 victims in 127 countries, which the US Attorney put at close to 94 percent of their losses (DOJ, 30 December 2024).
Can a crypto investment be a Ponzi scheme?
Yes. In SEC v. Shavers, the organizer allegedly promised Bitcoin investors up to 7 percent interest a week and used their Bitcoins to pay existing investors (same SEC alert).
Is a Ponzi scheme illegal? The rules in the US, UK and EU
Yes. Fraud law reaches it in the US and the UK, and UK and EU consumer law treats a pyramid promotional scheme as unfair in all circumstances.
Table 4. Rules that reach Ponzi and pyramid schemes, by jurisdiction.
| Jurisdiction | Rule | What it covers | Maximum | Who enforces |
|---|---|---|---|---|
| US | Rule 10b-5, with 15 U.S.C. 78ff(a) | Any "device, scheme, or artifice to defraud" in connection with buying or selling a security | Willful violation: $5,000,000, 20 years, or both; up to $25,000,000 if the offender is not a natural person | SEC; federal prosecutors in criminal cases |
| US | 18 U.S.C. 1343 | Wire fraud: a scheme to defraud using interstate or foreign wire, radio or TV communication | 20 years, a fine, or both; if it affects a financial institution, $1,000,000, 30 years, or both | Federal prosecutors |
| US | 18 U.S.C. 1348 | Securities and commodities fraud: securities of issuers registered or reporting under the Securities Exchange Act, commodity futures and options | 25 years, a fine, or both | Federal prosecutors |
| England, Wales and Northern Ireland | Fraud Act 2006, section 1 | Fraud, including by false representation (section 2) | 10 years, a fine, or both, on indictment | Police and prosecutors |
| UK | Digital Markets, Competition and Consumers Act 2024, Schedule 20 paragraph 16 | Establishing, operating or promoting a pyramid promotional scheme, in all circumstances unfair since 6 April 2025 | An offense: two years, a fine, or both, on indictment (sections 237(7) and 240) | Local weights and measures authorities in Great Britain, Northern Ireland's Department for the Economy and the CMA (section 231, same chapter) |
| EU | Directive 2005/29/EC, Annex I point 14 | The same pyramid promotional scheme, a practice "in all circumstances" regarded as unfair | Set by each member state: "effective, proportionate and dissuasive" (Article 13) | Courts or administrative authorities, as each member state decides (Article 11) |
Petters, for one, was indicted for mail fraud, wire fraud, money laundering and conspiracy.
How do banks help prevent Ponzi schemes, and how can you protect yourself?
Investors see statements; banks see the money move. In one FinCEN case example, a "stock trading formula" scheme collapsed when the operator ran out of money and suspicious investors called the FBI.
What did Madoff's banks see, and what did they file?
In about 1996 another bank filed a suspicious activity report on what looked like Madoff's round trip transactions and closed his account. On 29 October 2008 JPMorgan reported Madoff to UK regulators, but its US AML compliance officers never looked into him and it filed no SAR. The bank agreed to pay $1.7 billion (US Attorney, S.D.N.Y., 7 January 2014).
In the FinCEN case, Bank Secrecy Act reports, SARs among them, "helped to document the pattern of the money flow"; how fraud detection works covers finding it sooner.
complead, formerly Sanction Scanner, scores each inbound and outbound transfer before it completes. Its bank transaction fraud monitoring checks payer, payee and any intermediary bank and records the rule behind each hold and who acted. Fraud and AML signals share one customer record, so each customer has one risk score.
Checks before you invest
- Reply through the Firm Checker. If a firm contacts you out of the blue, the FCA says to use only the contact details listed there.
- Resist pressure to act quickly. The FCA also warns about returns too good to be true.
- Distrust rescue offers. Paying a fee to get lost money back may be a second scam (FCA).
A bank that sees new deposits paying earlier investors has one decision: file a SAR on the pattern, as Madoff's other bank did around 1996, or wait, as JPMorgan did in 2008.
Related terms
- Wire fraud. Fraud by wire, radio or TV, one of Petters' counts.
- Fraud vs money laundering. How a fraud and laundering its proceeds differ.
- Embezzlement. Theft by someone trusted with the money.
- Romance scam. A fake relationship built to get money.
- Financial fraud. Fraud aimed at money, investments or financial firms.
