Visa VAMP, the Visa Acquirer Monitoring Program, is Visa's monthly check on your fraud and dispute ratio, and it moved from advisory warnings to real financial penalties in one year. Visa launched it in April 2025, began enforcing fees in October 2025, and tightened the merchant threshold from 2.2% to 1.5% on April 1, 2026, so merchants who were compliant in March were in violation in April with zero change to how they operated. If you have heard the term "Visa VAMP" from a processor email, a peer, or a forum thread and do not know what it means yet, here is what merchant compliance under VAMP actually looks like, and why the threshold your processor enforces on you may not be the one Visa publishes.
VAMP, the Visa Acquirer Monitoring Program, is a monthly compliance check that scores your dispute and fraud activity as a ratio, and if that ratio crosses Visa's threshold, the penalties Visa assesses against your processor eventually land on you. Visa launched the program on April 1, 2025, consolidating five separate monitoring programs, including the Visa Dispute Monitoring Program and the Visa Fraud Monitoring Program, into one ratio and one set of rules.
An advisory period ran through September 30, 2025. During that window, merchants and acquirers received VAMP ratio reports, but no fines. Enforcement began October 1, 2025, with fees applied immediately to acquirers at the Excessive level. Then, on April 1, 2026, Visa tightened the merchant threshold again, from 2.2% down to 1.5%.
A merchant sitting at 1.75% in March 2026 was compliant. On April 1, with nothing different about how they ran their business, they were not. "Under VAMP, that wiggle room is gone. If you cross their new thresholds, you don't get a warning. You get penalized immediately," is how one high-risk payments advisory described the shift in mid-2025, and the April 2026 tightening proved it out. This is a merchant compliance program now, not a background process between Visa and your acquirer. It reaches your account directly.
Your VAMP ratio is calculated from two types of events, fraud reports and disputes, and one fraudulent transaction can count against you twice. Visa adds your TC40 fraud reports to your TC15 dispute records, then divides that total by your settled Visa card-not-present transactions for the month. TC40 and TC15 are the card data management events that acquirers track behind the scenes, and they are the only two inputs your ratio is built from. Only card-not-present activity counts, calculated monthly by Central Processing Date, against your specific merchant descriptor.
Here is the part almost no merchant learns until they are already over the line: when a fraudulent charge escalates into a chargeback, it generates a TC40 and a TC15 for the same transaction. One bad transaction hits your numerator twice.
Merchants processing fewer than 1,500 combined fraud and dispute events a month sit below Visa's monitoring floor and are not scored at all. Above that floor, here is the threshold that matters, and exactly when it moved:
| Period | Merchant Excessive threshold | Region |
|---|---|---|
| Through March 31, 2026 | 2.2% | US, Canada, EU, APAC |
| From April 1, 2026 | 1.5% | US, Canada, EU, APAC |
CorgiLabs ran the math on what that drop costs a merchant doing 60,000 transactions a month: at 2.2%, you could absorb up to 1,320 combined fraud and dispute events before hitting Excessive. At 1.5%, that ceiling drops to 900. Same volume, same business, 420 fewer incidents you are allowed before enforcement, overnight.
Cross the threshold on Stripe, and enforcement moves faster than the review that is supposed to happen first. Here is what that looked like for one merchant: "Revenue grew from $8,000 to $95,000 in a single month after a viral marketing push, and disputes followed almost immediately since new customers did not recognize the billing descriptor on their statements. Within three weeks, the Stripe account's restricted status appeared on the dashboard, and payouts stopped entirely."
That sequence is not rare and it is not random. High-risk payments advisors who track Stripe's VAMP enforcement report an internal threshold near 0.5%, well below the 1.5% Visa actually publishes as the merchant Excessive line, though Stripe has not confirmed this figure publicly. If that reporting holds, a merchant running at 0.8% could believe they are comfortably inside Visa's rules while Stripe has already flagged them internally. In the cases these advisors describe, the account gets restricted by an automated system before a human reviews the case, and the merchant learns their real threshold from the outcome, not from a warning in advance. "Settlement pauses often occur before merchant communication, creating fund freezes lasting three to 14+ days before any formal notice arrives," one analysis of the pattern found. For one founder, that review ran 120 days on $61,000 in held funds, money he needed for supplier payments and could not access. Nothing about the underlying business was fraudulent.
What crossing the threshold means for your merchant payment processing: a review that can run 60 to 120 days, an appeal process that exists on paper but resets the clock when documentation is incomplete, and, if the account closes and lands you on the MATCH list, up to five years locked out of a standard merchant account anywhere. Even winning a chargeback dispute does not remove it from your VAMP ratio. The dispute still counts.
Your ratio can spike from ordinary growth, not misconduct, and four specific situations cause it more often than fraud does. Visa's ratio does not distinguish between a fraud ring and a viral marketing week. It counts fraud reports and disputes against your transaction volume, and legitimate businesses generate both when they grow fast.
A promotional push that brings in a wave of new customers who do not recognize your billing descriptor on their statement. A card testing attack against your checkout that adds to your ratio even when the attack fails. January renewal season for fitness and wellness subscriptions, when a year of members lapse at once and dispute instead of calling to cancel. And the Q4 to Q1 lag: holiday purchases generate chargebacks 30 to 60 days later, so a strong December shows up as a Q1 ratio problem.
"A merchant with a 99.5% legitimate transaction history can still lose their Stripe account overnight in 2026, and the reason is rarely fraud," is how one high-risk processing analysis summarized it. The April 2026 threshold drop is the clearest proof: a merchant at 1.75% in March was in violation on April 1 without changing a single practice. Visa has signaled the threshold may keep tightening. VAMP is not a fraud problem. It is a payment operations problem, and legitimate merchants trigger it by growing.
There are only three ways to move this ratio before Visa does, and only one of them requires no technical prep. Pre-Dispute Alerts, through the Verifi CDRN and Ethoca networks, resolve a dispute before it ever becomes a TC15. It is payment automation working in your favor: disputes closed this way do not enter your ratio at all, which makes it the fastest lever available and the one most merchants in this position have never heard of.
Compelling Evidence 3.0 is the only tool that removes both entries, the TC40 and the TC15, after a transaction has already generated them. It is not a quick fix. It requires device ID and IP address captured on the original transaction, 120 days of transaction history, and resolution inside the same calendar month the dispute was filed. Worth building toward, not something you turn on this afternoon.
The third tool is not a network. It is a person. VAMP Monitoring means someone tracks your TC40 and TC15 counts every month and calls you before you approach the threshold, not after your dashboard turns red. For subscription merchants, Visa Account Updater closes a related gap: expired cards that never get updated cascade into disputes that feed the same ratio.
Stripe's own documentation places the entire burden of watching this ratio on you. Each month, Visa calculates the count, the ratio, and the volume, and Stripe tells you what it decided after the fact. For 14 years, we have built our practice around monitoring the compliance environment that mainstream processors leave to their merchants, with a 98% acceptance rate and a dedicated account manager on every account we approve. The difference is not what you know about VAMP now. It is who is watching your ratio when you are too busy running your business to check it yourself.
What is Visa VAMP? Visa VAMP, the Visa Acquirer Monitoring Program, is Visa's monthly program for tracking a merchant's fraud and dispute ratio. Visa launched it in April 2025 to replace five older monitoring programs, including the Visa Dispute Monitoring Program and Visa Fraud Monitoring Program, with one ratio and one set of thresholds.
How does Visa VAMP affect merchants? VAMP affects merchants by scoring their monthly fraud reports and chargebacks against their transaction volume. Merchants who cross the Excessive threshold face processor fees, account reviews that can run 60 to 120 days, and in the worst cases, account termination or placement on the MATCH list, which blocks a standard merchant account for up to five years.
What is the Visa VAMP threshold in 2026? The merchant Excessive threshold was 2.2% through March 31, 2026, and dropped to 1.5% on April 1, 2026, across the US, Canada, EU, and APAC. Merchants below 1,500 combined fraud and dispute events a month are not scored at all.
Does Stripe enforce the same VAMP threshold as Visa? Reportedly not. Advisors who track Stripe's VAMP enforcement describe an internal threshold near 0.5%, well below Visa's published 1.5% merchant threshold, though Stripe has not confirmed this figure publicly. Documented cases show automated account restrictions can happen before any human review.
Your processor already knows your ratio. The question is whether someone is watching it with you or waiting for it to cross the line before telling you.
Find out which one is true for your account. VAMP Monitoring shows you what a processor actually watching your ratio looks like, and Pre-Dispute Alerts via Verifi and Ethoca is the fastest tool available to keep disputes out of that ratio in the first place. Or skip ahead and talk to a dedicated account manager who will tell you where your ratio actually stands.