Your team shares one corporate card. Finance finds out about overages at month end

A virtual card is a card number with a policy attached to it. The number is real to the merchant and disposable to the buyer, which is the whole point: the control sits on the credential rather than on the person holding it. A limit, a merchant category, a single use, an expiry measured in days. The tradeoff is that everything downstream of the number then has to cope with a credential designed to stop working. Receipts, subscriptions, a refund to a card that has since closed, and a finance team that reconciles by the last four digits when the last four change every time.

Single use and recurring are opposite requirements, and the networks have started saying so in the response. Since October 2023 Mastercard has returned a merchant advice code identifying a consumer single-use virtual card number, code 41, alongside code 40 for a consumer non-reloadable prepaid card. It arrives on approvals as well as declines, so a merchant that reads it learns at the first successful payment that the credential should not be filed for later. Those two codes describe consumer products. A commercial card issued for spend management can present the same way to a merchant without necessarily carrying an equivalent flag, so the sequence runs: payment succeeds, subscription created, credential filed, and the second month fails on a number built to work once.

Consider a team of 40 people issued one card each with a $2,000 monthly limit. That is $80,000 of authorized exposure against a real spend of, say, $18,000, and the gap is the number a finance lead gets asked about. Cut every limit to $600 and exposure falls to $24,000, but say six of the forty then hit a ceiling mid-purchase in the first month, each producing a ticket and a raise request while somebody waits at a checkout. The per-person version costs more to set up and lands better: last quarter of spend per cardholder plus a margin, which for most of the forty is well under $600 and for three of them is well over $2,000.