Credit card processing fee calculator

Calculate your actual statement effective rate

Add the processing fees charged for one statement month, divide by that month’s card sales volume, then multiply by 100. For example, $1,000 in fees on $40,000 in card sales is a 2.50% effective rate. You don’t need to reconstruct every interchange rate to use this calculation.

Use processing charges, not the difference between sales and your bank deposit. Refunds, disputed sale amounts and reserves can reduce a deposit without being processing fees. Include any separately charged dispute or other processing fee if you want it included in this month’s total, and use the same basis when comparing months.

Count a fee once. If an annual fee was charged this month, include it in this month’s actual total. To compare a typical monthly quote instead, divide that annual fee by twelve in the estimator below. Those two figures answer different questions.

Estimate the cost of a processing quote

This estimator multiplies your card volume by a quoted percentage, adds per-transaction charges, then adds monthly fees and the monthly share of annual fees. Its effective rate is an estimate from those inputs, not a measurement of your actual statement.

A quoted rate on its own tells you very little, because two processors quoting the same percentage can cost a small store meaningfully different amounts once the fixed fees and the per-transaction charge are in. Comparing estimated effective rates on the same volume and transaction count makes those differences visible.

Where do I find the quote estimator inputs?

1. Monthly card volume: the total of all card sales for the month, usually labelled gross sales, total volume or amount processed.
2. Transaction count: the number of card sales, often shown as items or transaction count. If your statement gives it per card brand, add them together.
3. Percentage rate and per-transaction fee: on a flat-rate statement these are the headline numbers. For interchange-plus pricing, the markup alone is not the total rate. Use the actual-statement calculation above for a completed month; ask for an all-in estimate based on your card mix when comparing an offer.
4. Fixed monthly fees: statement fee, monthly minimum, PCI fee, gateway fee, batch fees. Add every recurring line that is not a percentage.
5. Annual fees: divide any yearly charge, such as an annual PCI or compliance fee, by twelve.

Enter only fees the quote actually charges. A monthly minimum can be conditional; don’t add its full stated amount if the quote says it is already satisfied by processing charges.

Why is my effective rate higher than the rate I was quoted?

Because the quote was a percentage and your bill is a percentage plus everything else. Three things widen the gap, and all three hit small stores hardest.

• Per-transaction fees. A fixed cost per sale is a large share of a small ticket. A store with a six dollar average basket feels a per-transaction fee far more than one with a sixty dollar basket.
• Fixed monthly fees. A statement fee and a monthly minimum cost the same whether you processed ten thousand or fifty thousand, so the lower your volume the more they weigh.
• Downgrades. Transactions that do not qualify for the rate you were quoted get billed at a higher one. Keyed entries, cards without address verification and some card types are the usual causes.

This is why we ask stores to run the arithmetic on their own statement rather than trusting a quoted number. The mechanics of the fee types are in our guide to what credit card processing fees actually cover.

What counts as a good effective rate?

There is no single answer, and anyone who gives you one without asking about your business is guessing. It depends on your average ticket, your card mix, whether the card is present, your industry, and your monthly volume.

What is universally true is that the comparison has to be like for like. Use the actual-statement calculation for your completed month. Compare quotes in the estimator using that same volume and transaction count, while checking which charges each quote includes. If a processor will not give you the numbers to do that, you have learned something useful about them.

The estimator’s starting numbers are examples, so replace them with the written quote you are checking. The sample rates we do publish are on our pricing page. Pricing is subject to underwriting, MCC and the merchant agreement; rates may differ and are subject to change.

If you want published competitor inputs to type in, Square's US fees page (retrieved 2026-09-11 from squareup.com/us/en/payments/our-fees) lists tap/dip/swipe at 2.6% + 15¢, 2.5% + 15¢ or 2.4% + 15¢ depending on plan, and online at 3.3% + 30¢ or 2.9% + 30¢. Put the percentage in the rate box and 0.15 or 0.30 in the per-transaction box. Those are Square's published figures that day, not a custom quote.

What the quote estimator leaves out

• Hardware. A terminal or register is a separate cost, one-time if you buy and recurring if you lease. It is covered in what a POS system costs.
• Chargeback fees, which only apply when a dispute happens and vary by processor.
• Early termination charges, which are a contract question rather than a monthly one.
• Cash discount or dual pricing programs, which change who pays the fee rather than what it is. That is a separate decision, covered on our cash discount and dual pricing page.

These exclusions apply to the quote estimator. The actual-statement result includes the processing fees you enter, so record which charges you included before comparing it with an estimate.

How to use this when you are shopping processors

1. Use the actual-statement calculation first and note which fees are included.
2. Ask every processor for the full fee schedule in writing, not a headline rate.
3. Use the quote estimator with the same volume and transaction count as your baseline. Check whether the quote includes every recurring processing charge.
4. Compare effective rates, then compare contract terms, then compare what happens if you leave.
5. Check a completed statement after switching, using the actual-statement calculation, and investigate any difference from the written estimate.

That last step catches more than anything else on this page. If you want a second read on a statement, send us what you are paying now and we will walk through it with you.