If your business processes card payments, a number just quietly got much harder to hit. As of April 1, 2026, Visa lowered the chargeback and fraud ratio that triggers monitoring and penalties from 2.2% down to 1.5% — a drop of more than a third. For a merchant running close to the old ceiling, that's the difference between a clean account and a compliance letter from your payment processor.
Most small business owners have never heard of the Visa Acquirer Monitoring Program, or VAMP, and that's exactly the problem. It runs quietly in the background until a merchant crosses the line, and by then the fees, the scrutiny, and sometimes the account restrictions have already started. Here's what changed, how the math actually works, and what to do about it before your next statement cycle.
What VAMP Actually Is
VAMP replaced a patchwork of older Visa monitoring programs (things like the Visa Dispute Monitoring Program and Visa Fraud Monitoring Program) with a single, combined score. Instead of tracking fraud and disputes separately, Visa now rolls both into one ratio and watches it at two levels: your payment processor's entire portfolio of merchants, and your individual merchant account.
The idea behind combining fraud and disputes into one number is simple: a transaction that gets reported as fraudulent by a cardholder's bank and later escalates into a formal dispute represents the same underlying failure — something went wrong before, during, or after the sale. Visa wants one metric that captures both, rather than letting a merchant look clean on fraud while quietly racking up chargebacks (or vice versa).
The Math Behind the Ratio
The VAMP ratio is a simple fraction:
(Fraud reports + Disputes) ÷ Total settled transactions
The numerator combines two data sources: TC40 reports (fraud flagged by the card issuer) and TC15 records (formal disputes, i.e., chargebacks). Only card-not-present transactions — the online and phone orders where the physical card was never swiped or dipped — count toward this ratio, since that's where fraud and disputes concentrate.
One detail catches merchants off guard: a transaction that starts as a fraud report and then escalates into a dispute can count in the numerator twice. If you're already running close to the threshold, a handful of unresolved fraud claims that later turn into chargebacks can push your ratio up faster than the raw transaction count suggests.
Here's the threshold change in plain terms:
| Before April 1, 2026 | After April 1, 2026 | |
|---|---|---|
| Merchant threshold (US, Canada, EU, Asia-Pacific) | 2.2% | 1.5% |
| Merchant threshold (CEMEA region) | 2.2% | 2.2% (unchanged) |
| Merchant threshold (Latin America/Caribbean) | 1.5% (since 2025 launch) | 1.5% (unchanged) |
If your business processes cards in the US, Canada, the EU, or Asia-Pacific, you're in the group that just lost a third of its cushion. A merchant who was comfortably under the old 2.2% ceiling at, say, 1.8%, is now over the new limit without a single additional dispute.
Who Actually Gets Monitored
Not every merchant is formally scored under VAMP. Visa only applies the program once an account reaches 1,500 combined fraud and dispute events (TC40s plus TC15s) in a single month. Below that floor, you're not formally in scope for a VAMP penalty — though that doesn't mean disputes are free; your processor may still apply its own internal thresholds that are stricter than Visa's, and every individual chargeback still comes with its own fee from your acquiring bank regardless of your ratio.
For a small merchant doing a modest volume of card-not-present sales, this threshold might feel distant. But it's worth checking your actual numbers rather than assuming: a subscription business, an e-commerce store during a holiday sales spike, or any merchant using a payment facilitator that pools smaller sellers under one umbrella account can cross 1,500 monthly events faster than expected.
What Happens If You're Over the Line
Merchants who land in VAMP's "excessive" tier face an $8 fee per fraudulent or disputed transaction, on top of whatever chargeback fees your acquiring bank already charges. There's typically a grace period — commonly cited at around three months — before formal program enrollment and fees kick in, giving a merchant a window to course-correct.
The bigger risk isn't always the direct fee; it's what happens upstream. Visa also monitors acquirers (your payment processor or merchant bank) at a portfolio level, with an "above standard" tier at 0.5% and an "excessive" tier at 0.7% of their combined merchant book. If enough of an acquirer's merchants are running hot, Visa can fine the acquirer directly — and acquirers facing that pressure often respond by tightening terms, increasing reserves, or terminating high-risk merchant accounts to protect their own standing. In other words, a merchant that looks like a chronic problem to their processor can lose the ability to accept Visa cards at all, well before Visa formally penalizes them individually.
Practical Steps to Stay Under the New Threshold
1. Find out where you actually stand. Ask your payment processor or payment facilitator for your current TC40 and TC15 counts and your resulting ratio. Many merchants have never seen this number because it isn't printed on a standard statement — you may need to specifically request access to fraud and dispute reporting.
2. Tighten fraud prevention at checkout. Address Verification Service (AVS) matching, CVV verification, and 3-D Secure authentication for card-not-present transactions all reduce the fraud reports that feed directly into your ratio. If you're running an online store without these basics enabled, this is the fastest lever to pull.
3. Use dispute-prevention tools before a chargeback is filed. Services like Verifi's CDRN, Ethoca alerts, and Visa's Rapid Dispute Resolution exist specifically to resolve a cardholder complaint — often as a refund — before it ever becomes a formal TC15 dispute. A resolved pre-dispute doesn't count against your ratio the same way a full chargeback does.
4. Fix clear communication problems. A surprising share of disputes aren't fraud at all — they're confusion. Cardholders who don't recognize a charge on their statement, weren't expecting a recurring billing cycle, or can't tell what business a transaction belongs to will often dispute first and ask questions never. Using a clear, recognizable billing descriptor and sending order confirmation and shipping emails promptly closes this gap.
5. Don't reflexively refund everything. It's tempting to avoid every dispute by refunding on request, but auto-refunding can be the wrong call financially if you're comfortably under threshold and the dispute is genuinely winnable with evidence. Fight the disputes worth fighting; concede the ones that are clearly your error.
6. Watch your numbers monthly, not annually. Because the ratio is a rolling monthly calculation, a bad month — a fraud attack, a botched product launch, a shipping delay that triggers a wave of "item not received" disputes — can spike your ratio quickly. Reviewing dispute and fraud counts monthly, rather than discovering a problem at renewal time, gives you room to react before a processor does.
Keeping the Full Picture in View
Chargebacks and fraud disputes don't just cost you the per-transaction VAMP fee or a chargeback fee from your bank — they also complicate your books. A dispute that's later reversed, a refund issued to head off a chargeback, and a fraud loss that gets written off all need to land in the right account, or your monthly numbers stop reflecting what actually happened. When these adjustments get buried in a black-box dashboard, it's easy to lose track of how much chargeback activity is actually costing you month over month.
Beancount.io provides plain-text accounting that gives you complete transparency and control over your financial data — every refund, chargeback, and fee is a line you can see, track, and query, with no vendor lock-in and no black boxes. Get started for free and see why developers and finance-minded business owners are switching to plain-text accounting.