A chargeback happens when a customer asks their bank to reverse a charge on your card terminal — and as a merchant, you rarely win the full amount back. Beyond the disputed transaction itself, card networks and your processor pile on flat dispute fees, and once your dispute rate climbs, your acquirer may lock up a slice of your revenue in a rolling reserve. This chargeback calculator turns your monthly card volume, your dispute rate, your average ticket, and your processor's reserve terms into one clear picture of what chargebacks actually cost you every month.
Adjust the inputs and the result card updates instantly. You will see the estimated number of disputes, the disputed sales you lose, the per-dispute fees your processor charges, the cash tied up in reserve, and the total monthly exposure — so you can price your risk or decide when to fight back.
How to Use
- Enter your Monthly Card Revenue — the total dollar volume of credit and debit cards you process in a typical month.
- Set your Chargeback Rate as a percentage of transactions. If you do not know it, ask your processor for your dispute-to-transaction ratio; many merchants run between 0.1% and 1.0%.
- Add your Average Order Value — the typical ticket size. The calculator divides monthly revenue by this figure to estimate how many transactions you run, then multiplies by your dispute rate to estimate dispute count.
- Enter the Fee per Dispute your processor or card brand charges. Most acquirers bill a flat $15–$100 fee for every dispute, even the ones you win.
- Set your Processor Reserve percentage if your acquirer holds back a rolling reserve. High-risk merchants commonly face a 5–10% reserve that sits out of your bank account for 6–12 months.
The result card breaks out estimated monthly transactions, estimated disputes, disputed volume, chargeback fees, reserve cash held, and the total monthly exposure (highlighted).
The Chargeback Cost Formula
Chargebacks cost you three things at once: the sale you already shipped, a flat processing fee, and often a chunk of cash frozen in reserve.
- Disputed volume = Monthly Card Revenue × Chargeback Rate
- Estimated disputes = (Monthly Revenue ÷ Average Order Value) × Chargeback Rate
- Fee cost = Estimated disputes × Fee per dispute
- Reserve held = Monthly Revenue × Reserve Rate
- Total exposure = Disputed volume + Fee cost + Reserve held
Worked example: a merchant processing $100,000 per month at a 0.6% dispute rate with an $85 average ticket. That is about 1,176 transactions, roughly 7 disputes per month, $600 in disputed sales, 7 × $15 = $105.88 in fees, and a 10% reserve holding back $10,000. Total monthly exposure: about $10,705.88 — over $128,000 a year in cash tied up or lost because of disputes alone.
Why the Dispute Rate Matters More Than You Think
Visa and Mastercard watch dispute rates closely. Once your count-to-sales ratio crosses roughly 0.9% in a monthly monitoring period, you enter a watch-list or excessive-disputes program: fines, higher reserves, and eventually terminal termination. At 1.0% with a $50 average ticket, a $50,000 monthly volume sees 10 disputes, $500 in lost sales, and — at a steeper $100 dispute fee — $1,000 in fees plus a $10,000 reserve. The rate is the lever: cutting it from 1.0% to 0.3% removes two-thirds of your cost overnight.
Examples
Example 1 — The default small business. A subscription shop processes $100,000/month at a 0.6% dispute rate, $85 ticket, $15 fee, 10% reserve. Disputed volume is $600, fees about $106, and the reserve holds $10,000. Total exposure near $10,706/month. The calculator flags that the reserve, not the disputes, is the biggest cash-flow drain.
Example 2 — High-volume scale. A brand doing $2,500,000/month at the same 0.6% rate faces roughly 176 disputes, $15,000 in disputed sales, $2,647 in fees, and a $250,000 reserve — $267,647/month locked up. At this size, even a 0.1% rate reduction justifies a full chargeback-prevention team.
Example 3 — Failing the card-brand threshold. A $50,000/month merchant at 1.0% with a $50 ticket and a $100 dispute fee runs 10 disputes, $500 lost sales, $1,000 in fees, and a 20% reserve of $10,000 — $11,500/month, and the rate itself is now a termination risk.
FAQ
How is the number of chargebacks calculated?
The calculator estimates your monthly transactions as revenue divided by average order value, then multiplies by your chargeback rate. For example, $100,000/month divided by an $85 ticket is about 1,176 transactions; at a 0.6% dispute rate that is roughly 7 disputes per month.
What is a normal chargeback rate?
Most healthy merchants run below 0.1%. Visa and Mastercard monitoring programs begin around 0.9% of transactions per month, and rates at or above 1.0% can trigger fines, increased reserves, or loss of processing privileges.
How much does a single chargeback cost?
Beyond reversing the sale, processors charge a flat dispute fee — commonly $15 to $100 — regardless of whether you win or lose. A $60 disputed order with a $15 fee and the cost of goods already shipped can easily cost you $80–$100 total.
What is a rolling reserve and why is it withheld?
High-risk or new merchants are often required to keep 5–10% of card volume in a rolling reserve held by the acquirer as security against future disputes. It is not a permanent loss, but it is cash you cannot access for 6–12 months — which is why this calculator shows it as a cash-flow exposure.
Should I fight every chargeback?
Not always. Responding costs time and often a rebuttal fee, and the cardholder usually wins friendly-fraud cases unless you have strong evidence. Fight disputes where you have proof of delivery, signed authorization, or clear fraud indicators; concede small ones to keep your team focused.
How can I lower my chargeback rate?
Clear billing descriptors, fast shipping, proactive customer service, requiring CVV and AVS checks, and a straightforward refund policy all cut disputes. Monitoring your monthly rate with this calculator shows whether your prevention efforts are actually moving the number.
Disclaimer
This chargeback calculator is provided for informational purposes only and does not constitute financial, legal, or payments-processing advice. Estimates are based on the inputs you enter and the formulas above; actual fees, reserves, dispute counts, and card-network thresholds vary by processor, industry, and program. Always confirm your terms directly with your payment processor and a qualified payments or compliance professional before making pricing or reserve decisions.