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Why Can’t You Pay One Cent by Card? The 50 Cent Floor, Explained
The cent is fine. The card is the problem.
Try to pay exactly one cent with a credit or debit card online and you will usually get an error, not a receipt. That is not because a penny is worthless. It is because every card payment carries a fixed fee that is bigger than a penny, and the companies that process cards would rather refuse the charge than lose money on it.
Quick answer: Card processors set minimum charges so their own fee never exceeds the payment. Stripe’s U.S. minimum is 50 cents, and its standard U.S. card price is 2.9 percent plus 30 cents, as of 2026. On a 50 cent charge, about 31 cents goes to fees. A one-cent charge would cost about 30 times the penny to process, so it simply isn’t allowed. A PayPal personal payment inside the U.S., funded from a PayPal balance or bank account, can move exactly one cent with no fee.
Where the 50 cents comes from
There is no law that says a card payment must be at least 50 cents. The floor most people hit online is a processor rule. Stripe’s currency documentation says it “enforces a minimum payment amount for all charges to make sure the Stripe fee doesn’t exceed your charge,” and lists 0.50 USD for U.S. dollars. Other currencies get their own floors: 0.50 euros, 0.30 British pounds, 50 Japanese yen.
The reason is the fixed part of the fee. Stripe’s published U.S. price is 2.9 percent plus 30 cents per successful domestic card charge. The percentage scales with the payment. The 30 cents does not. Here is what that does at different sizes, using that one price list:
- $100: fee $3.20, or 3.2 percent of the payment.
- $1: fee about 33 cents, or a third.
- 50 cents: fee about 31 cents, or 63 percent.
- 1 cent: fee about 30 cents, or roughly 3,000 percent. Hence the error message.
Fixed fees cannot be multiplied away by scale. Eight billion separate one-cent card charges would each carry their own 30 cents.
The arithmetic on this site
This site asks everyone on Earth to voluntarily send Chris, an individual, exactly one cent. By card, it can’t. So the card option is 50 cents, the smallest charge the processor allows. The card company keeps about 31 cents. The other 19 cents all count toward the goal: your penny, plus 18 extra. On larger amounts, only what the card company actually kept is booked as a fee. The full breakdown is on the math page, and the plain-language version is in the FAQ.
Where the fee actually goes
A card fee is split several ways. The biggest piece is usually interchange, a fee paid to the bank that issued the card. Visa publishes its U.S. interchange schedule, and the April 18, 2026 edition shows how the fixed parts pile up on a small online payment:
- A standard online credit payment on an ordinary consumer Visa card runs about 1.89 to 2.04 percent plus 10 cents, before anyone else takes a cut.
- A debit card from a large bank is capped by federal rule at 0.05 percent plus 21 cents, plus 1 cent if the bank meets fraud-prevention standards. That is about 22 cents on a 50 cent payment, and it would be about 22 cents on a one-cent payment too.
Then come network fees and the processor’s own margin. A flat price like 2.9 percent plus 30 cents bundles all of that into one number.
Durbin, debit, and the 21 cent cap
That debit cap comes from the Durbin amendment to the 2010 Dodd-Frank Act. It told the Federal Reserve to make debit interchange “reasonable and proportional to the cost incurred by the issuer.” The Fed’s answer, in Regulation II, was the 21 cent base, 0.05 percent and 1 cent fraud adjustment still printed on Visa’s schedule. It applies to issuers with $10 billion or more in assets.
For a $40 grocery run, that cap is a bargain. For a tiny payment, it is a cliff. A fixed 21 cents is a small slice of $40 and most of 50 cents. In 2023 the Fed proposed lowering the cap to 14.4 cents plus 0.04 percent plus a 1.3 cent fraud adjustment. As of 2026 that proposal had not been finalized, and Regulation II itself was being challenged in federal court.
Small-ticket rates help, a little
The card networks do know small payments are awkward. Visa’s schedule includes “small ticket” rates for small in-person purchases, such as 1.55 percent plus 4 cents for debit from smaller banks, and 1.90 to 2.20 percent with a 4 cent minimum for credit. That is why a coffee shop can take a card for a $3 latte without crying.
Notice the word “minimum” even there. Four cents is still four times a penny. Small-ticket pricing makes small payments cheaper. It does not make one-cent payments possible.
Why some stores say “$10 minimum for cards”
Merchants have their own math. Federal law, the same Dodd-Frank section, lets a U.S. business set a minimum purchase for credit cards of up to $10, as long as the minimum treats every card network and issuing bank the same. That permission covers credit cards, not debit cards. So a sign reading “$10 minimum on credit cards” is legal. A $15 minimum is not.
Why PayPal can move exactly one cent
PayPal’s U.S. consumer fee page, updated May 19, 2026, lists no fee for a domestic personal payment funded from a PayPal balance or a bank account. The money moves between accounts, not across a card network, so there is no card fee to recover. That is how this site’s first PayPal penny arrived whole.
The same table shows the edges. Fund the personal payment with a card and the sender pays 2.9 percent plus a fixed fee. Send it across a border and the sender pays an international fee, which on PayPal’s U.S. schedule is 5 percent with a 99 cent minimum. Other countries publish their own tables. So from abroad, a penny can cost the sender about a dollar, and the jar still receives exactly one cent. That is why the FAQ suggests the 50 cent card option instead for people outside the U.S.
One honest note. A personal payment is for sending money to a person, which is what this is: a voluntary gift, with nothing bought or sold. If you are ever paying for goods or services, use the purchase option meant for that.
A short history of micropayments
People have been trying to make tiny online payments work for about as long as there has been an online.
HTTP, the protocol that delivers web pages, set aside status code 402, “Payment Required,” in its 1997 specification. The 1997 text says the code “is reserved for future use.” The 2022 text says the same thing. The future remains reserved.
DigiCash, an early digital cash company, filed for Chapter 11 bankruptcy protection in 1998. A trade article the next spring observed that the public had not exactly clamored for online payments of a few cents. In 1999 the computer scientist Nick Szabo explained one reason in an essay on “mental transaction costs.” The cost of deciding whether something is worth a cent can exceed the cent. He named proposed schemes such as MilliCent, PayWord and MicroMint, and noted that micropayments had not succeeded on the internet.
Then came the web currencies. Beenz announced its shutdown in August 2001. Flooz, its rival, which had Whoopi Goldberg in its ads and about $300,000 lost to a fraud ring, announced its bankruptcy the same day.
What mostly happened next was bundling: subscriptions, app store balances, and prepaid credits, which turn many small charges into one larger card payment. The fixed fee gets paid once, and nobody has to decide about a single cent.
Which brings us back here. This site asks for exactly one decision about exactly one cent, once. Szabo would probably call that a mental transaction cost. We call it the whole bit. More on where the penny itself stands is in is the penny still legal tender, and what one cent buys offline is in what can a penny buy. Cash, for the record, has its own rounding problem.
If you feel like it, the jar takes exactly one cent.
Not affiliated with Visa, Mastercard, Stripe, PayPal or the Federal Reserve. Fees and rates are as published in 2026 and will change. Nothing here is financial advice.
Sources: Stripe minimum charge amounts, Stripe pricing, Visa USA interchange reimbursement fees, April 18, 2026, 15 U.S.C. 1693o-2 (Durbin amendment, credit card minimums), Federal Reserve on Regulation II, Federal Register, 2023 Regulation II proposal, ICBA on the Regulation II court case, PayPal U.S. consumer fees, RFC 2068 (HTTP/1.1, 1997), RFC 9110 (HTTP semantics, 2022), ESJ, Boom then Bust: How Electronic Cash Faltered (1999), Nick Szabo, Micropayments and Mental Transaction Costs (1999), The Hustle on Beenz and Flooz.
Meet the penny jar ↗By Chris. All articles