Quick answer
Mastercard has two main chargeback monitoring programs — ECM and HECM — plus a fraud program called BRAM. Once you enter any of these programs, your acquirer gets notified and fines begin. The key metric is chargebacks in the current month divided by transactions in the prior month — and the threshold is 1.5%, not 1.0%.
How Mastercard measures your chargeback ratio
Mastercard calculates your chargeback ratio using chargebacks received in the current month divided by transactions processed in the prior month. This is a lagging calculation, which means your ratio today reflects business you did 30 days ago — including campaigns or products you may have already stopped running.
The ratio alone is not enough to trigger a program. You must also exceed a minimum count. ECM requires 100+ chargebacks. HECM requires 300+. A merchant processing 200 transactions per month with a 2% ratio does not meet the count threshold even though their ratio is elevated.
The three Mastercard programs
Excessive Chargeback Merchant (ECM)
Threshold: 1.5% chargeback-to-transaction ratio AND 100+ chargebacks
Consequence: Monthly fines starting at $1,000 — escalating to $100,000+ and potential termination.
High Excessive Chargeback Merchant (HECM)
Threshold: 3.0% chargeback-to-transaction ratio AND 300+ chargebacks
Consequence: Higher monthly fines plus mandatory remediation plan submission to your acquirer.
BRAM (Business Risk Assessment and Mitigation)
Threshold: Fraud-specific: 0.5% fraud-to-transaction ratio OR presence in fraud reports
Consequence: Acquirer notification, enhanced monitoring, potential account restrictions.
BRAM and fraud monitoring
BRAM focuses on fraud chargebacks specifically. A 0.5% fraud-to-transaction ratio — much lower than the overall chargeback threshold — can trigger BRAM. This is particularly dangerous for merchants who accept cards in high-fraud BINs or geographic regions without adequate fraud screening.
BRAM enrollment means your acquirer must take action. Some acquirers interpret this broadly and may restrict your processing volume or add reserves while a remediation plan is in place. Read your acquirer agreement to understand what BRAM enrollment triggers on their end.
How to stay out of Mastercard programs
Monitor your dispute count and ratio weekly — not monthly. A single bad week, if left unaddressed, can push you over the monthly threshold. Use pre-dispute alert systems to resolve eligible chargebacks before they are counted. Set an internal warning at 0.9% so you have a 0.6-point buffer before ECM.
If you are already in ECM, the path out requires a formal remediation plan submitted to your acquirer. See how to write a chargeback remediation plan and use the MID termination warning signs guide to catch related processor pressure early.
Mastercard vs Visa program comparison
Visa's VAMP program replaced older threshold programs in April 2025. It uses a single unified ratio and adds an enumeration component. Mastercard's ECM/HECM structure is separate — a merchant can be clean with Visa but in ECM with Mastercard simultaneously. Monitor both networks independently.
HighRiskIntel tracks both Visa and Mastercard chargeback exposure in a single dashboard, flags when you are approaching program thresholds, and surfaces the specific orders or campaigns driving ratio increases. If you process on both networks, a unified view is the only reliable way to catch problems before they turn into program enrollment.