Smiling pennysend one
penny to me
Back to the experiment ↗

FIELD NOTES / THE MATH

Eight billion people. One cent each.

The arithmetic is perfect. Everything after the arithmetic is the problem.

Gross receipts, if everyone did it

One-cent contributionsGross
1,000$10
10,000$100
100,000$1,000
1,000,000$10,000
100,000,000$1,000,000
8,000,000,000$80,000,000

The population is rounded to eight billion for storytelling. The real figure is about 8.2 billion, which makes the headline $82 million and the plan no more realistic. It includes babies, people without payment accounts, and people who will correctly decide not to do this.

What the fees do to a penny

Card processors have minimums and fixed fees. Stripe will not charge less than $0.50, and a standard US card charge costs about 2.9 percent plus $0.30. So a one-cent card charge is impossible, a $0.50 charge nets about $0.19, and a $1 charge nets about $0.67.

Eight billion separate one-cent card charges are not a thing. Fixed fees cannot be multiplied away by scale. This is why the one-cent option is 50 cents by card or 52 cents by PayPal: the penny counts, the processor keeps most of the rest, and whatever is left over is listed separately as a fee allowance, never toward the goal. The $1 and $10 options say exactly what they are.

Why there are no ads for this

Even ignoring every fee, if one visitor in twenty sent a penny, a visit would be worth $0.0005. Buying traffic for that is a worse plan than the plan. The only distribution that makes sense is people sending the link to people.

First milestone

1,000 actual pennies. That is $10 gross, and the first real story this site can tell.


Editorial note: numbers are from the processors’ published pricing pages as of October 2026 and will drift. Nothing here is a forecast.

Meet the penny jar ↗