What Are Visa's New VAMP Rules? A 2026 Guide for Merchants

Visa's VAMP (Visa Acquirer Monitoring Program) consolidates fraud and dispute monitoring into a single ratio and holds acquirers accountable for the merchants in their portfolio. As of April 1, 2026, the merchant "excessive" threshold tightened to 1.5% (150 bps) — down from 2.2% at launch — with an $8-per-dispute fee. Even low-risk merchants can push their acquirer over its much stricter 0.3%–0.5% limits, triggering restrictions that land back on you.

Visa's VAMP has changed the game for acquirers and merchants alike. Even if you're a low-risk merchant with clean records and relatively few chargebacks, you could still be putting your processor at risk, and that risk could land back on you.

Let's unpack what VAMP really means for merchants and how it ties into broader chargeback rules and compliance requirements, and why being "under Visa's radar" isn't enough anymore, starting with a few key questions worth asking.

Question 1: What are the VAMP thresholds for merchants and acquirers in 2026?

Answer: VAMP launched on April 1, 2025, and the rules tightened again on April 1, 2026. Acquirer thresholds are far stricter than the merchant limits:

Acquirer VAMP Thresholds:

• Above Standard: 0.3% to <0.5% (30–50 bps)
• Excessive: 0.5% (50 bps), with 1,000+ combined fraud and non-fraud disputes per month

Merchant VAMP Thresholds:

• Excessive ratio: 1.5% (150 bps) as of April 1, 2026 — reduced from 2.2% (220 bps) at launch
• Fee: $8 per dispute in the Excessive tier, administered through your acquirer
• Regional exception: CEMEA merchants keep a 2.2% (220 bps) threshold

👉 So even if you're below the merchant threshold, your dispute activity could still push your acquirer over the line — and that puts you at risk of restrictions or account termination.

Most acquirers also use internal thresholds that aren't publicly disclosed, and they can tighten them at any time. That's why staying proactive with Alerts is key.

Learn more from Visa's official VAMP program breakdown.

Question 2: How do I calculate my dispute ratio under the VAMP rules?

Answer: Visa uses this formula:

VAMP Ratio = (All fraud (TC40) + All non-fraud disputes (TC15)) ÷ total settled transactions

That includes:

• TC40 (fraud reports)
• TC15 (non-fraud disputes — think: friendly fraud, delivery issues, unclear billing)

Even if a dispute is resolved later, it still counts — if it triggers a TC40 or TC15 report, it stays on the books.

Exceptions:

• If a dispute is resolved using a pre-dispute tool (like Order Insight or Rapid Dispute Resolution) before Visa collects data, it may be excluded (as long as the RDR didn't result in a TC40).
• The same goes for wins under Compelling Evidence 3.0 — if resolved early enough.

Here's a quick example:

If you had 10 TC40s or TC15s in a month and 5,000 Visa transactions:

10 ÷ 5,000 = 0.2% VAMP ratio

While the merchant excessive threshold is 1.5%, it's best to stay well below 0.3%, since each PSP may set stricter internal expectations. Staying proactive helps protect your business.

Question 3: I heard Visa only flags merchants with over 1,000 disputes per month. I barely hit 100 — so why should I care?

Answer: The 1,000-case figure is just the point at which merchants are most likely to be flagged. While Visa doesn't formally act until you cross that line (and meet the minimum settled-transaction count), your data still affects your processor's overall risk score.

And if your dispute ratio is creeping up, your processor could penalize you long before Visa steps in.

Also, don't forget:

Mastercard rules are tougher. They may flag merchants with as few as 100 disputes and a 1.5% ratio. So even a moderate number of chargebacks can put your status at risk across networks.

That's why it's important to stay proactive with a dispute mitigation strategy. Chargeflow's Alerts automatically monitor early warning signs like TC40s and pre-dispute cases, giving you the chance to resolve them on autopilot before they escalate into chargebacks.

Bottom line: Just because you're not hitting Visa's formal limits doesn't mean you're in the clear.

Question 4: If I'm under Visa's limits, why does my ratio still matter?

Answer: Because your activity counts toward your acquirer's portfolio risk.

Visa's model is all about holding acquirers accountable, so even low-volume merchants can tip the scale. If your individual VAMP ratio (fraud + non-fraud ÷ total Visa sales) is high enough, you could:

• Contribute to your acquirer breaching its threshold
• Trigger fines or audits for your processor
• Get flagged, fined, or even dropped, just to protect their portfolio

This isn't just a "big merchant" problem anymore. Your numbers affect your acquirer, even if you're not over Visa's official limits.

And here's the tricky part: even if you're not near Visa's published limits, you may not know you're at risk until you get a notice from your processor. Internal thresholds are usually stricter and not shared with merchants.

That's why it's critical to keep your dispute ratio low and stay proactive with Alerts. Chargeflow Alerts provides real-time visibility into your dispute risk, enabling you to act before a chargeback is filed — staying ahead of both Visa and Mastercard programs, as well as your processor.

Question 5: Can my processor take action even if Visa doesn't?

Answer: Yes — and they often will.

If your chargebacks or fraud alerts raise red flags, your processor may:

• Charge you higher dispute or risk fees
• Put your account on a watchlist
• Demand a mitigation plan
• In extreme cases, terminate your account without waiting for Visa

Acquirers are highly motivated to stay under VAMP thresholds. If you make it difficult, they'll act fast.

Question 6: How do I stay off the radar and protect my business?

Answer: Here's what smart merchants are doing now:

1. Know your ratio:
   • Disputes (TC40s + TC15s) ÷ total Visa sales
   • Stay well under 0.3%
2. Spot patterns early:
   • Look for spikes from certain products, customer regions, or shipping issues.
3. Strengthen fraud prevention:
   • Use 3DS, velocity checks, and device fingerprinting.
4. Simplify your transaction experience:
   • Clear billing descriptors, detailed receipts, and straightforward refund policies go a long way.
5. Act fast on alerts:
   • Using Chargeflow Alerts? You're covered — we handle early warning disputes automatically.
   • Using another service? Make sure you respond immediately to avoid chargebacks.

Question 7: What changed when VAMP moved from advisory to full enforcement?

Answer: VAMP rolled out in phases:

• Advisory period (April 1 – September 30, 2025): Visa notified merchants and acquirers that breached thresholds but did not assess penalties. Acquirers, however, could already act preemptively.
• Full enforcement (October 1, 2025 onward): Visa began formal enforcement and fines for merchants in the Excessive tier.
• Tightened thresholds (April 1, 2026): The merchant excessive ratio dropped from 2.2% to 1.5%, pulling more merchants into enforcement scope on the same dispute volume.

The takeaway: the grace period is over. If your ratio is too high today, you're exposed to fines and restrictions now, not at some future date.

Final Word

You might be flying under Visa's radar, but your processor sees everything.

The VAMP rules shift accountability upstream. That means your dispute ratio doesn't just affect you — it affects your acquirer. And when their risk goes up, they won't hesitate to pass the pressure back to you.

Keep your ratio low. Monitor alerts. Be proactive.

And if you're using Chargeflow, you're already ahead — because you're stopping disputes before they become chargebacks. Start for free.