Chargeback rate

Chargeback rate is the share of a merchant's transactions that result in a chargeback: a payment reversal initiated when a cardholder disputes a charge with their card issuer, rather than seeking a refund directly from the merchant. It is calculated as chargebacks / total transactions over a period, and card networks such as Visa and Mastercard set monitoring thresholds above which a merchant faces fines, higher fees, or loss of the ability to accept cards at all.

Chargebacks arise from several distinct causes that analytics teams track separately: fraud, where the cardholder didn't make the purchase; "friendly fraud," where a legitimate purchase is disputed anyway, often because the buyer doesn't recognize the statement description or simply wants a refund without returning goods; and merchant error, such as billing the wrong amount or failing to deliver. This differs from the authorization rate, which reflects whether a payment was approved in the first place, not whether it was later disputed.

Chargeback rate matters because excessive chargebacks threaten a merchant's ability to process payments and signal underlying problems in fraud detection, product delivery, or customer service. Effective transaction monitoring aims to catch fraudulent transactions before they are ever charged, since prevention is far cheaper than disputing a chargeback after the fact, and evidence requirements to fight a dispute are set by the card networks, not the merchant.