VAMP Explained: Visa's Acquirer Monitoring Program and 2026 Thresholds

If you’ve kept an eye on Visa’s dispute and fraud programs, the acronyms VDMP and VFMP are now history. Visa folded both into a single program, changed how the math works, and has been tightening the thresholds ever since.

This guide explains what VAMP is, how it consolidated the old programs, how its combined ratio is calculated, where the thresholds stand as of 2026, what happens when you breach them, and how to stay comfortably underneath. Compliance numbers shift and vary by region, so treat the figures here as a working reference and confirm your exact thresholds with your acquirer.

What VAMP is

VAMP is the Visa Acquirer Monitoring Program. It took effect on April 1, 2025 and replaced two separate programs merchants used to track independently:

• VDMP — the Visa Dispute Monitoring Program, which watched your chargeback (dispute) ratio.
• VFMP — the Visa Fraud Monitoring Program, which watched your fraud ratio.

Under the old structure, fraud and disputes were measured separately, each with its own threshold. VAMP merges them. As the name says, the program is aimed at acquirers — Visa monitors acquiring banks at the portfolio level — but acquirers don’t absorb the cost. They push the monitoring, the fees, and the remediation pressure down to the individual merchants driving their numbers up. So while VAMP is technically an acquirer program, it lands squarely on merchants.

How the VAMP ratio works

The defining change in VAMP is the combined ratio. Instead of tracking fraud and disputes on two separate meters, VAMP adds them together:

VAMP ratio = (fraud reports + non-fraud disputes) ÷ total settled transactions

Two things about this formula matter:

1. It’s measured by count, not dollar value. A $9 dispute and a $900 dispute each count as one. Low-value chargebacks you might be tempted to ignore still move the ratio.
2. Fraud and disputes share one budget. Under the old programs, you could be fine on fraud and fine on disputes as two independent checks. Under VAMP, a merchant with moderate fraud and moderate disputes can breach the combined threshold even though neither category alone would have tripped the old separate limits. The consolidation removed the cushion.

This is why merchants who were comfortable under VDMP and VFMP have had to recheck their standing. The bar isn’t two separate hurdles anymore; it’s one combined line.

The 2026 thresholds

Visa phased VAMP in with a transitional threshold and then tightened it. As of 2026, the merchant “excessive” threshold is 1.5% (150 basis points) in the US, Canada, Europe, APAC, and LATAM, down from the transitional 2.2%, with the stricter level effective April 1, 2026. The CEMEA region stayed higher.

A few important caveats: these numbers change over time, they differ by region, and Visa has used early-warning and transitional bands during rollout. Confirm your current threshold with your acquirer rather than relying on any single published figure — the direction of travel has been consistently downward, and what’s accurate this quarter may tighten next.

For context on how these ratios relate to the chargeback rate you may already be tracking, see our guide to what counts as a good chargeback ratio.

What happens if you exceed the threshold

Crossing the excessive line doesn’t get you shut down overnight, but it starts a process you don’t want to be in:

• Monitoring and identification. Your acquirer is notified that you’re an excessive merchant and is expected to act.
• Non-compliance assessments. Visa levies fees for merchants in the program, and your acquirer passes them to you. These scale with volume and duration, so a sustained breach gets expensive.
• Remediation pressure. Your acquirer will demand a plan to bring the ratio down, and may impose reserves, higher fees, or volume caps in the meantime.
• Termination risk. If the numbers don’t improve, the acquirer can terminate your account to protect its own portfolio standing.
• MATCH listing. A termination for excessive chargebacks or fraud can land you on the Mastercard MATCH list — the industry blacklist that makes obtaining a new merchant account extremely difficult for up to five years. Our guide to the Mastercard MATCH list explains how that works and why it’s so hard to escape.

The through-line: a VAMP breach is a warning shot, but the escalation path ends somewhere genuinely damaging.

How to stay under the threshold

Because the VAMP ratio combines fraud and disputes, staying under it means working both sides of the numerator and, where possible, growing the denominator.

Cut fraud at the source. Use AVS and CVV checks, 3-D Secure where it fits, velocity limits, and risk scoring to stop fraudulent orders before they settle. Every fraud report you prevent is one that never enters the numerator. This is the highest-leverage lever, since fraud tends to cluster.

Reduce non-fraud disputes. A large share of non-fraud chargebacks are avoidable: unclear billing descriptors, slow refunds, confusing subscription terms, and shipping delays. Fixing operational friction removes disputes before they’re filed. Our guide to preventing chargebacks covers the specifics.

Respond to disputes fast. Fighting and winning representment recovers your funds. Note the important caveat below about ratio impact, but winning still matters for revenue and for signaling to your acquirer that you take disputes seriously.

Watch the count, not just the dollars. Because VAMP counts by transaction, low-value disputes matter as much as large ones. Don’t skip small cases on the assumption they’re too cheap to bother with — they move the ratio identically.

An important caveat on won disputes

Winning a dispute recovers the money, but a chargeback generally counts toward your ratio at the moment it’s filed, and winning representment doesn’t always reverse that count. In other words, fighting disputes protects your revenue but may not fully protect your VAMP ratio. That makes prevention and low overall chargeback volume essential — you can’t win your way out of a ratio problem on representment alone. Confirm with your acquirer exactly how contested and won disputes are counted under your VAMP terms, because the treatment can vary.

VAMP vs. the old programs at a glance

The bottom line

VAMP replaced Visa’s separate dispute and fraud programs on April 1, 2025 with a single combined ratio, and it has been tightening since — the merchant excessive threshold sits at roughly 1.5% in most regions as of 2026, effective April 1, 2026, though it changes and varies by region, so confirm your number with your acquirer. Because fraud and disputes now share one budget and are counted by transaction, the margin for error is thinner than it was. Prevent fraud, cut avoidable disputes, respond to every case, and keep both halves of the numerator low — winning representment protects revenue, but staying under VAMP is won on prevention.