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Payments Glossary · Risk & Compliance

Mastercard ECM and HECM

Also called Excessive Chargeback Merchant, High Excessive Chargeback Merchant, Mastercard excessive chargeback program

Mastercard's excessive chargeback tiers, with count and ratio triggers and fines that escalate into six figures if left unresolved.

What it is

Mastercard's excessive chargeback program identifies merchants at two levels. Excessive Chargeback Merchant status is reported to apply at 100 or more chargebacks in a month combined with a ratio above 1.5 percent for two consecutive months. High Excessive Chargeback Merchant status applies at 300 or more chargebacks in a month with a ratio at or above 3 percent. The ratio is computed as chargebacks in one month divided by transactions in the preceding month. That lagging denominator matters for seasonal businesses: a strong month followed by a weak one inflates the ratio even if behavior did not change. The count minimum is the merchant-friendly part of the design. A small merchant with a handful of disputes may exceed the percentage without triggering the program, because the 100-chargeback floor has not been met. That protection disappears as volume grows. Fines escalate steeply and monthly. Reported schedules run from 1,000 dollars in month two, through 5,000 in months four to six, 25,000 in months seven to eleven, 50,000 in months twelve to eighteen and 100,000 monthly beyond that for ECM, with HECM roughly doubling those figures, plus a reported 100 dollar monthly reporting fee and a possible per-chargeback issuer recovery assessment above 300 chargebacks. Exit requires falling below threshold for three consecutive months. Confirm all figures with your acquirer, since program terms change.

Why it matters to your business

The count minimum means most very small merchants will not trip this program, and that creates false comfort as you grow. If you are approaching 100 chargebacks a month, your window to fix the underlying cause is measured in weeks, because exiting requires three consecutive clean months and the fines run the whole time. The practical response is to watch both numbers, count and ratio, not just the percentage, and to know that a slow month raises your ratio without any change in your behavior. This is education, not legal advice; Mastercard program terms are contractual and change, so confirm current thresholds and fee schedules with your acquirer.

Where it gets contested

The escalation schedule is designed to be intolerable, and that is the intent: Mastercard is pricing the cost a bad merchant imposes on issuers. Merchants counter that the clock runs on calendar months while the fixes, changing a fulfillment process, rebuilding a subscription flow, replacing a fraud rule set, take longer than one month to show up in the numbers. The lagging denominator draws specific criticism from seasonal and event businesses, which is a live issue in Southwest Florida where season-driven volume swings are the norm rather than the exception. A merchant whose disputes arrive after the season ends is measured against the quiet month. The unresolved question is what happens as thresholds fall. Under the Global Merchant Audit Program schedule, the excessive threshold steps down over the coming years. Merchants who are safely inside today on a 1.5 percent standard may not be at 0.9 percent, and there is no published transition support for merchants in that path.

How to check it yourself

Pull your monthly chargeback count and your prior-month transaction count for the last twelve months and chart the ratio yourself. If any month shows the count climbing toward triple digits, escalate to your processor now rather than at the threshold.

Receipts

Claims above that are checkable, with where to check them. Published so you do not have to take anyone's word for it.