What a card BIN is, and why it gets your card declined

Last updated 30 July 2026 · Reviewed quarterly

If a funded card is refused instantly, identically, every time you retry — and support tells you nothing is wrong with it — you have met a BIN rule. It is the one payment failure where nobody is making a judgement about you at all: the decision was made about a range of card numbers before you ever signed up. Here is what is actually happening and what it means for you.

Key takeaways

A BIN is the first six to eight digits of a card number. It identifies the issuing bank, the network, the country and the card type.
Merchants and processors apply rules to whole BIN ranges, so a refusal is about the range your card belongs to rather than about you or your balance.
This is why retrying never works, why the failure is instant, and why nobody can give you a refund or an explanation.
No public list exists of which BINs a given merchant accepts, so any service promising its cards "definitely work" is guessing.

What the digits actually encode

Every card number begins with an issuer identifier — historically six digits, now often eight — that is registered rather than random. It is the reason a payment page can show a Visa logo the moment you type the first four digits, before you have entered anything else.

The network. 4 begins Visa, 5 begins most Mastercard ranges, 34 and 37 begin American Express.
The issuing institution. A specific bank or card programme owns each registered range.
The issuing country, which is how a merchant knows a card is foreign before you tell them.
The product type: debit, credit, prepaid, commercial, or a specific tier within those.

That last one is the one that decides whether your virtual card works. A range registered as prepaid is visible as prepaid to every merchant that looks, no matter what balance sits behind it or what the card says on the front.

Why a merchant would refuse a whole range

Not to inconvenience you. Prepaid and certain virtual card ranges carry measurably higher rates of chargebacks, fraud and failed recurring charges than ordinary bank-issued credit. A merchant selling subscriptions has a specific reason to care: a card that cannot be charged again next month is a subscription that breaks after one payment.

Chargeback economics. Disputes cost the merchant a fee regardless of outcome, and some ranges generate far more of them.
Recurring reliability. A prepaid balance that empties silently produces failed renewals, support load and involuntary churn.
Fraud screening. Ranges associated with anonymous funding attract more stolen-card traffic, so the rule is a blunt instrument applied to a real pattern.
Regulatory and sanctions exposure, since a BIN reveals the issuing jurisdiction.

How to tell a BIN refusal from every other decline

Distinguishing a BIN rule from other payment failures
Symptom	BIN refusal	Something else
Speed	Instant — no verification step	Often a pause, a redirect, or an OTP
Consistency	Identical every single attempt	Varies between attempts
Effect of adding balance	None whatsoever	Fixes an insufficient-funds decline
Your bank app	Frequently shows nothing at all	Usually shows a declined attempt
Other merchants	Card works fine elsewhere	Card may fail elsewhere too
A different card, same issuer	Also fails	May succeed

Distinguishing a BIN rule from other payment failures

The last row is the strongest test. If two different cards from the same issuer both fail while a card from a different issuer succeeds, the pattern is the issuer’s ranges rather than anything about you or the amount.

Checking your own BIN before you commit money

Take the first eight digits of the card number. Nothing else about the card is needed and you should not enter anything else anywhere.
Look them up in any public BIN database. These are indexed from published registration data and are free.
Read the card type. If it returns "prepaid", expect subscription merchants to be difficult.
Read the issuing country, since a mismatch with your billing address is a separate and independent cause of refusal.
Treat the answer as a prior, not a verdict. A prepaid BIN is a warning sign, not a guarantee of failure, and a commercial credit BIN is encouraging rather than certain.

Why nobody can tell you which BINs a merchant accepts

Because it is not published, by anyone, ever. Acceptance rules are commercial fraud-control configuration held between a merchant and its processor. They differ between merchants using the same processor, they are adjusted without notice, and publishing them would tell fraudsters exactly which ranges to use.

This has a practical consequence worth being blunt about. Any card issuer advertising that their cards are "accepted by" a specific service is describing past experience at best. A range accepted this month can be reclassified next month, and it happens.

It also means the only reliable test is the actual transaction. Which is why the sensible way to try a virtual card is to load roughly one month of the subscription price and attempt the charge — a refusal costs you a few dollars of unused balance rather than a year of it.

What to do once you know

Try a different issuer rather than a different card from the same one. Ranges cluster by issuer, so a second card from the same programme usually shares the fate of the first.
Prefer issuers whose ranges present as commercial credit rather than consumer prepaid, while remembering that this is a tendency and not a promise.
Stop after two or three issuers. At that point the pattern is that this merchant does not accept the category of card available to you, and further attempts cost money to learn nothing.
Switch to a payment route with no card in it at all — an app store balance, or a gift subscription someone bought with an ordinary bank card.

Two or three issuers refused? A gift code removes the card from the transaction entirely.

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Frequently asked questions

What does BIN stand for on a card?

Bank Identification Number — the first six to eight digits of a card number, now also called the IIN or Issuer Identification Number. It encodes the card network, the issuing institution, the issuing country and the product type, which is why a payment page can identify your card before you finish typing.

Why is my card declined because of its BIN?

Because the merchant or its payment processor applies a rule to the whole range your card belongs to, usually because prepaid and some virtual ranges produce more chargebacks and more failed recurring charges. The decision was made about the range rather than about you, which is why retrying, adding balance and contacting support all achieve nothing.

How do I check my card BIN?

Take the first eight digits and look them up in any free public BIN database. It will return the network, issuer, country and card type. Never enter the full card number, expiry or security code — a genuine BIN check needs only those first digits, and anything asking for more is harvesting card details.

Can I find out which BINs a merchant accepts?

No. Acceptance rules are private fraud-control configuration between a merchant and its processor, they vary between merchants using the same processor, and they change without notice. Publishing them would tell fraudsters which ranges to use. Any issuer claiming their cards are definitely accepted somewhere is describing past experience, not a guarantee.

Does adding more money fix a BIN decline?

No, and this is the clearest way to identify one. A BIN refusal happens before the balance is even considered, so it fails identically whether the card holds one dollar or a thousand. If adding funds changes nothing and the failure is instant every time, you are looking at a range rule rather than an insufficient-funds decline.

Sources

Primary sources where one exists. All links checked on publication; if one has rotted or the rule has changed, tell us and we will fix it.

[1]Stripe decline codes — StripeSupports: The distinction between codes that reflect a card-type or category restriction and those that reflect balance or authentication problems.