Why your chargeback ratio is a pass-fail metric
Your chargeback ratio determines whether you can continue to process payments, with scheme rules enforced by your acquirer creating hard pass-fail conditions for your account. Both Visa and Mastercard operate monitoring programmes that track merchant chargeback levels monthly. These programmes, like the Visa Dispute Monitoring Program (VDMP), have defined thresholds for both the number of disputes and the value of disputes as a percentage of your total sales. Breaching these high risk chargeback ratio thresholds results in your acquirer being fined by the schemes, a cost they will pass directly to you.
For most merchants, the standard threshold is 100 disputes and a 0.9% dispute-to-sales count ratio in a single month. However, there are lower tiers that can trigger warnings and increased scrutiny sooner. While a single month above the threshold may only result in a warning and a remediation plan, consistently high ratios will lead to escalating fines and eventual termination. Acquirers view a rising chargeback trend as a leading indicator of future losses and will act to protect themselves, often by placing your account under review, increasing reserves, or issuing a notice of termination, even if you have not technically breached a scheme programme limit yet.