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Your Dashboard Says You're Fine. Your Acquirer May Disagree.
Visa updated its fraud and dispute rules effective April 2026. The part that got covered was the new merchant threshold. The part that did not get covered is that Visa simultaneously tightened the rules for the acquiring banks that process your payments, and those banks are now cutting merchants to protect themselves, even merchants who are technically compliant.
What Is the Visa VAMP Program?
The Visa Acquirer Monitoring Program (VAMP) is the framework Visa uses to hold acquiring banks accountable for fraud and dispute activity across their entire merchant portfolio. Effective October 2025, VAMP replaced the older Visa Dispute Monitoring Program (VDMP) and Visa Fraud Monitoring Program (VFMP), combining them into a single unified ratio that applies to both acquirers and the merchants in their portfolios.
The consolidation matters because it removed a safety valve. Under the old programs, elevated fraud and elevated disputes were tracked separately. Under VAMP, both feed the same number. A merchant who was managing one metric carefully can now find themselves over threshold because the other crept up.
Visa has stated that the new program has the potential to address four times the amount of fraud globally, accounting for more than $2.5 billion in losses compared to previous programs. That ambition is real. So are the consequences for merchants caught on the wrong side of it.
Your Dashboard Is Understating Your Real Risk by Up to 40 Percent
Most merchants check their chargeback rate in Stripe, Shopify Payments, or their PSP dashboard and assume they know where they stand. That number is almost certainly lower than what your acquiring bank is actually calculating, often by 30 to 40 percent.
The reason is structural. Visa counts events, not dollars. The VAMP formula is:
(TC40 Fraud Reports + TC15 Disputes minus Exclusions) ➗ Settled CNP Transactions
Most processor dashboards report a dollar-based ratio. They also typically exclude pre-dispute alerts that were resolved before converting to a formal chargeback. The result is a number that looks clean but does not reflect what Visa and your acquirer are actually seeing.
To find your real number, pull the last 90 days of online transactions from your processor. Count your disputes and confirmed fraud reports. Divide that count by your total settled CNP transactions. That is your VAMP ratio. Compare it to the thresholds below.
The Two Thresholds. Most Merchants Only Know One of Them.
Most coverage of the VAMP update focused on the merchant threshold dropping from 2.2% to 1.5%. That change matters. But the acquirer threshold change is the one driving account closures.
1.5%0.5%0.7%Transaction Count
1,000The merchant threshold dropped by 0.7 percentage points. The acquirer threshold dropped by half, from 1.0% to 0.5%. Keeping an entire portfolio of merchants under 0.5% is structurally far harder than keeping a single merchant under 1.5%.
There is another asymmetry worth understanding. For merchants, Visa removed the above-standard early warning stage entirely. Once you cross the excessive threshold, penalties apply immediately. Acquirers have a graduated structure with an early warning tier. That means acquirers have more runway to see a problem coming, and more incentive to act against high-ratio merchants before those merchants trigger fees at the Visa level.
Being Compliant With Visa Is Not the Same as Being Safe With Your Acquirer
This is the part that did not get covered when VAMP launched.
Visa publishes two thresholds. One for individual merchants. One for the acquirer's entire book of business. When an acquirer's portfolio average climbs toward 0.5%, they face per-dispute fees across their whole portfolio. The math does not care whether your individual rate is compliant. It cares whether your number makes the portfolio average worse.
Your acquirer is now sitting in front of a spreadsheet, sorting merchants by VAMP ratio from highest to lowest, and deciding how many to cut to protect their portfolio. Some acquirers are setting internal merchant thresholds as low as 1%, tighter than Visa's own rule, specifically to give themselves buffer room.
Visa pushed the cost of fraud onto acquirers, and acquirers are pushing it onto merchants by cutting the riskiest ones first, even when those merchants are technically inside the merchant-side threshold.
Patterns we have seen from merchants since VAMP enforcement began:
- A merchant running at 0.9% received notice that their rolling reserve was increasing from 5% to 15% and that they needed to file a chargeback mitigation plan within 30 days. No threshold was crossed. The acquirer was protecting its portfolio average.
- A subscription brand at 1.1%, with three years on the same processor, received account closure notice citing a "portfolio review" with no specific violation cited. The acquirer was trimming the top of its risk distribution.
- A Shopify Payments merchant at 1.3% had payouts held an extra cycle and was told to bring their rate under 1% before Q3. Shopify Payments is itself an acquirer subject to VAMP portfolio rules, which is the part most operators miss.
None of these merchants did anything new. The threshold under them changed.
There is also a quieter second-order effect. Acquirers are becoming more selective about new merchant applications. Categories including supplements, drop-shipping, ticketing, and high-AOV electronics are seeing more rejections or being routed to high-risk processors at significantly higher effective rates. The same pressure, applied at the other end of the funnel.
Why One Transaction Can Count Against You Twice
Every component of the formula is something you can influence. Understanding each one is the starting point for reducing your ratio.
TC40 Fraud Reports are filed by issuing banks when a cardholder reports a transaction as fraudulent. These are upstream fraud signals that arrive before any chargeback is opened. A transaction can generate a TC40 without ever becoming a formal dispute, but it still counts in your numerator. One transaction can also generate both a TC40 and a TC15, meaning it gets counted twice.
TC15 Disputes are the formal chargebacks filed against your account. These include fraud-based disputes, friendly fraud, and service-related chargebacks across non-fraud condition codes 11, 12, and 13.
Exclusions are the mechanism that reduces your numerator. Two categories qualify. First, pre-dispute resolutions through tools like Visa's Rapid Dispute Resolution (RDR) and Order Insight, where disputes are resolved before they are formally filed. Second, CE 3.0 qualified fraud disputes where compelling evidence has been used to demonstrate the transaction was legitimate. Both exclusions are contingent on timing: they must be resolved within the same monthly data extract window to count.
Settled CNP Transactions are your card-not-present sales for the month. Card-present transactions are excluded entirely from both the numerator and denominator.
The calculator above applies this formula in real time. Pay close attention to the headroom figures, the number of additional disputes you can absorb before breaching each threshold. For most merchants that number is more actionable than the ratio itself.
The Three Levers That Actually Move the Number
1. Stop Disputes Before They Are Filed
Visa's alert networks, including Verifi and Ethoca, notify merchants when a cardholder contacts their issuing bank about a transaction, before that contact becomes a formal chargeback. You can refund or resolve the transaction during that window. If you do, the dispute never gets logged against your VAMP ratio. In Chargeflow's merchant network, alerts reduce final chargeback rates by roughly 80 percent on average. That is the most effective single lever available because it removes events from the numerator before they are ever counted.
2. Win Representments With CE 3.0
Compelling Evidence 3.0 allows merchants to reverse first-party fraud chargebacks, the "I don't recognize this charge" type filed against legitimate purchases. To qualify, you need two matching data points tying the disputed transaction to a previous undisputed transaction within a 60-day window. Device ID, IP address, shipping address, and customer account data all qualify. A successful CE 3.0 representment does not just recover the funds. It removes the dispute from your VAMP count entirely because won representments are reclassified.
3. Maximize Your Exclusions
RDR auto-resolves disputes at the network level before they are formally counted. Order Insight surfaces transaction details to issuing banks and cardholders at the moment of inquiry, resolving confusion before it escalates. Neither tool works without integration, but both produce ratio improvements that compound month over month.
The 72-Hour Window Most Merchants Do Not Know They Have
When a cardholder contacts their bank about one of your transactions, there is typically a 24 to 72 hour window before that dispute is formally filed with Visa. Most merchants never know it happened. By the time the chargeback arrives, the window has closed and the dispute is already counting against their VAMP ratio.
Chargeflow Alerts connects you to the Verifi and Ethoca pre-dispute networks and automates the resolution workflow so that window becomes an opportunity rather than a missed chance. When an alert is triggered, you receive a real-time notification with the transaction details.
Chargeflow matches it against your order data, applies your configured rules, and either auto-resolves or flags it for review. The dispute never reaches the formal chargeback stage. It never enters your TC15 count. It never affects your VAMP ratio.
For merchants managing significant CNP volume, this is the difference between a ratio that trends down and one that stays flat despite every other effort. It also gives your acquirer's risk team exactly what they need to see: documented evidence that disputes are being intercepted, managed, and resolved. That paper trail is often what separates the merchants who get reviewed from the ones who get cut.
Chargeflow Alerts integrates directly with Shopify, WooCommerce, and most major platforms. Setup takes under an hour.
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Questions?
we’ve got answers.
The VAMP ratio measures a merchant's combined fraud and dispute activity as a percentage of their settled card-not-present transactions. The formula is: (TC40 fraud reports + TC15 disputes minus exclusions) divided by settled CNP transactions.
Under current VAMP rules, the excessive threshold is 1.5% for merchants in the US, Canada, EU, and Asia Pacific, with a minimum of 1,000 monthly CNP transactions. Merchants below the minimum are not subject to fees regardless of ratio.
Acquirers enter the above-standard tier at 0.5% and the excessive tier at 0.7%. These thresholds apply to the acquirer's entire portfolio, not individual merchant accounts.
Yes. Acquirers are removing merchants whose ratios pull the portfolio average toward the 0.5% acquirer threshold, regardless of where those merchants sit relative to the merchant-side limit. Some acquirers have set internal limits as low as 1%.
No. VAMP applies only to card-not-present transactions. Card-present purchases are excluded from both the numerator and the denominator.
Processor dashboards typically report a dollar-based ratio and exclude pre-dispute resolutions. Visa uses a count-based formula. The difference is usually 30 to 40 percent, which is why merchants are surprised when their acquirer flags them.
TC40 reports are fraud signals filed by issuing banks when cardholders report unauthorized transactions. They count toward your VAMP ratio even if the cardholder never formally opens a chargeback, and a single transaction can generate both a TC40 and a TC15.
Typical responses include rolling reserve increases, mandatory mitigation plans, payout delays, or account closure. These actions can occur even when the merchant is below Visa's threshold because the acquirer is managing their own portfolio exposure.
Most merchants see measurable improvement within 60 to 90 days. Chargeflow merchants using alerts see chargeback rate reductions of roughly 80 percent on average.
More Questions?
Still have questions about VAMP or how to stay within the threshold? Let's talk.
