Chargeback Ratio: How It's Calculated and Why It Matters
Your chargeback ratio is the number of disputes in a month divided by a month of transactions, shown as a percentage. Mastercard flags merchants from 1.5% of chargebacks and Visa from 1.5% of fraud plus disputes in most regions, both with minimum counts, and most acquirers act before that. It is the number that decides whether you keep your account, so know exactly how your provider calculates it.
How the ratio is calculated
Visa
Visa's acquirer monitoring program uses one combined ratio: reported fraud plus disputes, divided by settled transactions in the same month. A fraud report counts even when no chargeback follows, so Visa's figure is often higher than your chargeback count suggests.
Mastercard
Mastercard divides the chargebacks received this month by the transactions processed in the previous month. If sales fall, the ratio rises even when disputes stay the same.
Try it with your own numbers
Chargeback ratio calculatorWork out the same figure for your own month before reading on.
A worked example
A merchant processes 20,000 card transactions in May and receives 260 chargebacks in June, while June sales drop to 15,000 transactions. On Mastercard's method, June's ratio is 260 divided by 20,000, or 1.3%. Measured against June's own sales it would be 1.7%. The same disputes can land on either side of a 1.5% line depending on the definition.
Visa and Mastercard limits
- Visa: excessive at 1.5% or more with at least 1,500 fraud reports and disputes in a month, in the US, Canada, Europe, Asia Pacific and Latin America since 1 April 2026; in parts of Central and Eastern Europe, the Middle East and Africa, notably the Middle East, the line stays at 2.2%, with a minimum of 150 cases and USD 75,000.
- Mastercard: excessive chargeback merchant from 1.5% with at least 100 chargebacks in a month, and high excessive from 3% with at least 300.
- Your acquirer: many set lower internal limits and act on a rising trend before the scheme lines are reached.
What happens above the limits
Merchants in a scheme monitoring program face fines that the acquirer passes on, and are expected to bring the ratio down within a set time. Acquirers respond with reserves, lower limits or delayed settlement, and in the end with termination. A merchant terminated for excessive chargebacks can be put on Mastercard's MATCH list or Visa's terminated merchant list for five years, which most acquirers check before boarding anyone.
Why the ratio lags
Cardholders can usually raise a dispute up to 120 days after the transaction, and when goods or services are delivered later, up to 120 days after the expected delivery date, within a maximum of 540 days. Problems in this month's sales can therefore show up in your ratio months later, so fix causes as soon as disputes start to rise.
How to keep it down
- Use a billing descriptor customers recognise, and show it on the receipt.
- Refund quickly where a case is weak; a refund is cheaper than a dispute.
- Use the card schemes' pre-dispute alerts, so you can refund before a chargeback is filed.
- Send renewal reminders and make cancelling easy.
- Use 3-D Secure and fraud rules where the losses actually come from.
- Answer disputes with the evidence the scheme asks for.
Telling a provider about your ratio
State your ratio, how you calculated it and the reasons behind it. Underwriters are used to imperfect numbers; what damages an application is a materially different figure found after approval.
Check your own situation
Your ratio is only one of the factors a provider weighs. Answer four questions to start checking which payment routes may fit your business.
Four questions about your business
Industry, company country, customer markets and estimated monthly volume, that is all we need to begin.
Related guides
Rolling reserve
A rolling reserve is a percentage of each payout that your acquirer holds back for a fixed period, typically three to six months, before releasing it. It covers refunds and chargebacks that can arrive long after you have been paid. The money is still yours, but while it is held it is not working capital, so the terms matter as much as your processing rate.
High-risk payment processing
High-risk payment processing is card acceptance for businesses that acquirers and card schemes consider more likely to cause chargebacks, fraud, legal or reputational problems. It is a classification, not a verdict on your business: it means fewer providers will take you on, underwriting asks for more, and terms include safeguards such as reserves. With the right provider, high-risk businesses process cards every day.
What is an acquirer?
An acquiring bank is licensed by the card schemes to accept card transactions on your behalf, holds your merchant account, and settles the funds to your bank. It also carries the financial risk if you cannot refund your customers, which is why the acquirer, not the gateway, decides whether you are accepted.
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