Chargeback ratio: how to calculate it and keep it low

A chargeback ratio is the share of your card sales that come back as chargebacks: chargebacks in a period divided by transactions in the same period. Most people write it as a percentage, and the card networks write it in basis points, where 100 basis points equals 1%. If you had 18 chargebacks on 2,400 sales last month, your ratio was 0.75%, or 75 basis points. Your acquirer watches that number, and so do Visa and Mastercard.

The catch is that each network defines the ratio its own way, and the definition decides whether you're in trouble. This guide covers the simple formula, the versions Visa and Mastercard use, the monitoring thresholds as the networks publish them, and how to bring the number down. Thresholds are as of October 2026. For what each chargeback costs you in fees, see our chargeback fee guide.

How do you calculate a chargeback ratio?

Divide the chargebacks you received in a month by the card transactions you processed that month, then multiply by 100 for a percentage or by 10,000 for basis points.

Take a bike shop in Denver with a busy online store. In September it runs 2,400 card transactions and receives 18 chargebacks.

• 18 ÷ 2,400 = 0.0075
• As a percentage: 0.0075 × 100 = 0.75%
• In basis points: 0.0075 × 10,000 = 75 basis points

That's the simple version, and it's the right one for tracking your own trend month to month. When a network or an acquirer is the one counting, though, three choices change the answer: what goes on top, what goes underneath, and which month a chargeback belongs to.

Visa's version comes from its VAMP fact sheet. Mastercard's ratio is described in its February 2019 Security Rules and Procedures. Ask your acquirer which version it uses in its own reviews, because it may not match either one.

What chargeback ratio triggers Visa and Mastercard monitoring?

Visa's line for a single US or Canadian merchant is 150 basis points (1.5%), together with a minimum count of 1,500 fraud reports and disputes in the month. Mastercard's older published rules start at 100 basis points with at least 100 chargebacks. These are the figures we could confirm in network documents:

The Visa merchant line used to be higher. Visa's fact sheet shows the ratio threshold dropping from 2.2% to 1.5% on April 1, 2026, and it says entities identified above the thresholds must put risk mitigation controls in place. Mastercard's current Security Rules and Procedures still require acquirers to act once a merchant's card-not-present fraud passes 100 gross basis points: for e-commerce, that means capturing the CVC 2 code or becoming Mastercard Identity Check enabled. Its current Excessive Chargeback Program sorts merchants into Excessive Chargeback Merchant and High Excessive Chargeback Merchant tiers. We couldn't confirm current Mastercard chargeback thresholds in a public document, so the 2019 figures above are the latest we can cite. Ask your acquirer for today's numbers.

Why can your Visa ratio be higher than your chargeback count suggests?

Because Visa's formula adds fraud reports on top and only counts card-not-present sales underneath. Both push the number up for a business that sells in person and online.

Picture a boutique in New York City that runs 9,000 Visa sales a month: 6,000 online and 3,000 at the counter. In one month it gets 45 disputes (40 on online orders, 5 in the store) and 30 fraud reports on online orders.

• Simple ratio: 45 disputes ÷ 9,000 sales = 0.5%, or 50 basis points.
• VAMP-style ratio: (40 + 30) ÷ 6,000 card-not-present sales = 70 ÷ 6,000 = about 1.17%, or roughly 117 basis points.

Same store, same month, and the Visa-style number is more than double. It's still under Visa's 150 basis point merchant line, and 70 cases is nowhere near the 1,500 count minimum, so Visa's program wouldn't flag this store. But 117 basis points is well above the 70 basis point level at which Visa calls an acquirer's whole portfolio excessive. Expect your acquirer to notice a merchant running hotter than the portfolio it's being measured on.

One wrinkle: if some fraud reports and disputes land on the same orders, ask your acquirer how its reports count them. We'd rather you find out from a phone call than from a reserve notice.

What is a good chargeback ratio?

There's no official "good" number. The thresholds above are ceilings, not targets, and Visa notes that acquirers may have their own risk assessment parameters and may charge fees even for merchants under its dispute ratio target. So the useful question is how far below the ceilings you sit.

Here's our rule of thumb, built from the published lines. It's our judgment, not a network rule.

Why start worrying at 50? Because that's where Visa's fact sheet starts calling an acquirer's portfolio "Above Standard." Your acquirer is graded on the mix of all its merchants, and a merchant well above that line pulls the average the wrong way.

What happens if your chargeback ratio is too high?

Usually your acquirer acts first, long before a network program does. What it can do is spelled out in your merchant agreement, and the steps tend to escalate:

1. Questions and a review of your sales and refund practices.
2. Higher fees or added conditions, which Visa acknowledges acquirers may set on their own.
3. A reserve or delayed funding. The OCC's examiner handbook lists delayed settlement and reserves among the tools for merchants with heightened fraud and chargeback risk.
4. Network program requirements, such as Visa's risk mitigation controls or Mastercard's CVC 2 and Identity Check rule.

The OCC also calls chargeback credit risk a significant risk to an acquirer's earnings and capital, which explains the urgency. If a merchant can't cover its chargebacks, the acquirer pays.

How do you lower your chargeback ratio?

Shrink the top of the fraction. A bigger denominator from real sales growth helps, but you can't plan around it, and the disputes don't go away. In rough order of payoff:

1. Refund valid complaints before they become disputes. A refund isn't a dispute or a fraud report, so it never enters the ratio. Our chargeback vs refund guide runs the comparison.
2. Use pre-dispute tools. Visa's VAMP ratio leaves out disputes resolved through pre-dispute solutions. Order Insight shares order details with issuers before a dispute is filed, and in a Visa case study on Rapid Dispute Resolution, the sample rule was to always refund disputes under $40.
3. Fix your billing descriptor. Visa says the acquirer should submit the name most prominently displayed by the merchant, the one cardholders recognize.
4. Screen card-not-present orders. Clearo's online payments include fraud screening with AVS, CVV checks, and velocity rules, which go after the fraud reports that Visa adds to the top of its ratio.
5. Answer friendly fraud with evidence, but know the limit. Visa's Compelling Evidence 3.0 rules can win a fraud dispute from a returning customer. Winning gets your money back; it doesn't erase a dispute that was already filed, because pre-dispute resolution is the only exclusion Visa's fact sheet names. Our Compelling Evidence 3.0 guide explains the rules.
6. Go after your top reason code. A ratio is a total; the fix is always specific. Our guide to chargeback reason codes shows how to read the pattern.

For the full list of fixes by cause, see how to prevent chargebacks.

What mistakes make a chargeback ratio misleading?

Most bad readings come from counting, not from the business. Watch for these:

1. Mixing timing methods. Count chargebacks by the month they arrived, or by the month of the original sale, but pick one and keep it. Switching between them makes the trend line meaningless.
2. Leaving out fraud reports. Visa's ratio counts them alongside disputes, so a store that only counts chargebacks can underestimate its Visa number.
3. Watching the percentage alone. Visa's merchant line comes with a count minimum, and Mastercard's 2019 rules had one too. A small store can sit above 1.5% without Visa identifying it, but that won't help in a conversation with its acquirer.
4. Refunding after the dispute lands. It doesn't remove the dispute, and Visa's guidance is to accept the dispute and not issue a credit once a valid one has been processed.
5. Reading one month as a trend. Chargebacks often arrive weeks or months after the sale, so a seasonal business can look worse than it is.

Take a gift shop that runs 6,000 card sales in December and 2,000 in January. In January it receives 30 chargebacks, almost all on December orders. Measured against January's sales, that's 30 ÷ 2,000 = 1.5%. Measured against the December sales they came from, it's 30 ÷ 6,000 = 0.5%. Same chargebacks, very different story. Know which one your acquirer is looking at.

How do you track your chargeback ratio each month?

Ten minutes a month is enough. Pull your statement, count, divide, and write it down.

1. Count chargebacks received in the month, by network.
2. Count all card transactions in the month, and separately your online, phone, and mail-order sales.
3. Work out the simple ratio: chargebacks ÷ all transactions.
4. Work out a Visa-style ratio: Visa disputes plus fraud reports on card-not-present sales ÷ Visa card-not-present sales. Ask your processor how many fraud reports were filed on your sales.
5. Note the top two reason codes.
6. Compare with the last three months. A rising trend matters more than any one month.

Your statement won't always label these lines clearly. Our guide on how to read a merchant statement shows where chargebacks and adjustments usually sit. If your ratio creeps toward your acquirer's limits, see whether you need chargeback management software.

The Visa merchant line applies across Canada as well, so a Canadian store can run exactly the same math. Our guide to chargebacks in Canada covers the parts that differ there, such as Interac Debit.

Next step

If you don't know your chargeback ratio today, that's the first thing to fix. Send us a recent statement for a free statement review, and we'll count your chargebacks and fees and show you where your ratio stands. Clearo's payment processing includes chargeback management tools and a dedicated rep for every client, so you have someone to call before a high month turns into a reserve. Or contact us to talk through your numbers.