Vigilant
Just explore Start now

Payments Glossary · Risk & Compliance

Mastercard GMAP (Global Merchant Audit Program)

Also called GMAP, Global Merchant Audit Program

Mastercard's restructured monitoring framework, reported effective April 1, 2027, adding new dispute categories and stepping excessive thresholds down through 2031.

What it is

The Global Merchant Audit Program is Mastercard's announced restructuring of its merchant and acquirer monitoring. Reporting indicates it takes effect April 1, 2027, retiring the Acquirer Chargeback Monitoring Program and adding four new categories alongside the existing excessive fraud and excessive chargeback programs: High Dispute Merchant, Excessive Dispute Merchant, High Dispute Acquirer and Excessive Dispute Acquirer. The headline change is a scheduled tightening. The excessive chargeback threshold is reported to hold in a 1.5 to 2.99 percent band through 2028, then step down to 1.3 percent in 2029, 1.1 percent in 2030 and 0.9 percent in 2031, while the 100-chargeback monthly minimum and the 3 percent high excessive threshold hold. The new dispute categories target small but concentrated problems rather than large merchants. High Dispute Merchant is reported at 5 or more transactions, 5,000 dollars and a 5 percent ratio. Excessive Dispute Merchant is reported at 5 or more transactions, 10,000 dollars and a 50 percent ratio. Excessive Dispute Merchant fines escalate very steeply, reported from 5,000 dollars in month one toward 100,000 dollars a month by month three, and merchants over that threshold for two months are reported to become liable for fraud-related chargebacks for the three months preceding identification and the six months following. Because this is a future program, treat all figures as announced rather than operative, and confirm them with your acquirer as the date approaches.

Why it matters to your business

Nothing about GMAP changes your obligations today, and anyone selling you something because of it is selling ahead of the facts. What it should change is your planning horizon. If your business model runs a dispute rate between 0.9 and 1.5 percent, you are inside today's threshold and outside the one scheduled for 2031. That argues for treating dispute prevention as an infrastructure investment rather than a reaction, particularly for subscription, future-delivery and card-not-present models where the ratio is structural rather than accidental. This is education, not legal advice. GMAP is an announced future program; confirm the operative parameters with your acquirer before making decisions on them.

Where it gets contested

The debate is about direction and about small merchants. Stepping the excessive threshold from 1.5 percent to 0.9 percent over roughly five years is a substantial tightening in a period when first-party misuse is rising, not falling. Merchant advocates argue the networks are shifting the cost of a consumer-friendly dispute experience onto sellers while continuing to market that experience to cardholders. The new low-count dispute categories are aimed at merchants with tiny transaction counts and terrible outcomes, which is a sensible fraud-detection design, but the 5-transaction floor means a brand-new merchant with a handful of bad orders can be captured almost immediately. The retroactive liability element is the most aggressive feature. Making a merchant liable for fraud chargebacks in the three months before identification is a look-back that most small businesses have no reserve to absorb. Whether it survives to implementation in its announced form is not settled, and the program does not take effect until 2027.

How to check it yourself

Take your current twelve-month average dispute ratio and compare it against 0.9 percent. If you are above that line, put a note in your 2027 and 2029 planning to revisit your dispute prevention stack, and ask your acquirer annually whether the announced GMAP schedule still stands.

Receipts

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