“1% a day.” “8% a week.” “Doubles every month, capital protected.” It sounds tempting — until you run it through compound interest for a single year, and the number turns impossible. No real business grows that fast. The tool below converts the rate someone promised into figures you can actually read: what your money becomes in a year, the annual rate, and how quickly it would double. It lets you spot the math of a Ponzi on the spot.
- Enter the rate they promised (e.g. “1% per day”), the compounding period, and your principal.
- Press “Calculate” to see the one-year balance, the annual return, and how soon it doubles.
- It all runs in your browser. Nothing is uploaded or recorded.
Why “high returns” fall apart the moment you compound them
Ponzi schemes love a small-looking number to lull you: “It’s only 1% a day, that’s not much, right?” The catch is that compounding turns that small number astronomical. At 1% a day, a year (365 days) doesn’t add 365% — it grows to roughly 38 times your money, an annual rate above 3,600%. No real business, investment, or trading strategy on earth sustains that. The only thing that can keep paying it is paying earlier investors with later investors’ money — which is exactly what a Ponzi scheme is.
There’s a plain yardstick for judging any return promise: the world’s best long-term investors compound at roughly 20% a year over decades. Anything well above that order of magnitude that still dares to sell you on “guaranteed” or “capital protected” is almost certainly not paying out of real profit. The more reasonable and sustainable a return is, the less it leans on “can’t lose” as a pitch. The louder someone ties “high” and “safe” together, the more dangerous it is.
This tool computes math, not predictions
It shows how large the number would get if that return actually held — so you can judge whether the promise is realistic. It cannot confirm whether a specific project is a scam, and it is not investment advice. The real red line is simple: anything promising fixed, guaranteed, high returns — however professional the packaging — should be treated as suspect first.
What do these “high returns” usually look like? Open for the common playbooks
This math maps onto a few high-frequency scams. The most common is the fake high-rebate and Ponzi scheme: dressed up as “exchange rebates,” “yield pools,” or “mining custody,” it pays you real returns at first, then vanishes once you raise your stake and bring in friends. The second is the AI quant copy-trading scam: it claims a “guaranteed AI strategy” while the backend simply edits the numbers and stalls every withdrawal. The third often pairs with pig butchering — they build a relationship or trust first, then steer you toward one of these “high-yield platforms.” Once you know the playbook, the same scripts get much easier to catch early.
Common questions
Are the numbers it gives actually reliable?
The calculation uses the standard compound formula: one-year balance = principal × (1 + rate)^periods, with periods counted as 365 daily, 52 weekly, or 12 monthly. The math itself is certain. It tells you what the result would be if that rate truly held for a year — and the result being absurd is exactly why the promise can’t be true.
Are my inputs uploaded or stored?
No. The whole calculation runs locally in your browser. We don’t collect, upload, or store any of the numbers you enter. Refresh the page and the record is gone.
They say “it’s simple interest, not compound” — does that make it fine?
Even as simple interest, “1% a day” is 365% a year — far past the ceiling of any real investment. Compounding just makes the absurdity more vivid. The issue isn’t compound vs. simple; it’s the promise of “stable, capital-protected, fixed high returns” itself, which doesn’t exist in the real financial world.
Instead of chasing “guaranteed high returns,” learn to see through the playbook
People who actually last in the market rarely start by hunting for the “highest yield” — they start by recognizing the traps. If you plan to get into crypto, begin with a major, reputable exchange through its official channel, and don’t hand money to an unknown “high-yield platform.” OKX is one major exchange; its official domain is okx.com.
Related reading
- Fake high-rebate and Ponzi schemes — how “rebate pools” and “yield schemes” reel you in step by step.
- AI quant copy-trading scams — the truth behind a “guaranteed AI strategy.”
- Pig butchering — build trust first, then steer you to a “high-yield platform.”
- Scam self-check — when unsure, run the red flags in 30 seconds.