Refund cost calculator: what a refunded order really costs

No, and not at any major US processor. Stripe's documentation says it plainly: "Stripe's processing fees from the original transaction aren't returned." PayPal's US merchant fees page says "there are no fees to make the refund, but the fees you originally paid to receive the payment are not returned to you." Square says "the processing fees for the payment aren't refunded back to you." The published PayPal Braintree fee schedule says "Transaction fees charged by PayPal Braintree will not be returned for refunded transactions." Helcim, Shopify Payments and Authorize.net are the same. Every one of those sentences was read from the processor's own document on 5 September 2026.

The mechanic is what makes it expensive. You hand back 100 percent of what the customer paid and keep none of what you paid to collect it. A refunded order is not a cancelled sale, it is a sale that happened, cost a fee, and produced no revenue. A business with a 10 percent return rate is paying card processing on a tenth of its volume for nothing at all.

It was not always this way, which is why so many pages are wrong. Square returned processing fees on refunds until it changed the policy for US sellers on 11 April 2023, saying it does not recoup those fees in full from its own network and payment partners. PayPal returned the percentage portion and kept the fixed fee until 2019, then stopped returning anything. Any calculator or blog post written before those dates is still describing a product that no longer exists, and several of them still rank.

One processor charges you twice. Authorize.net's fee definitions state that "the credit card transaction types for which the per-transaction fee is charged are: charges, refunds, voids and declines." The gateway fee on its Gateway Only plan is 10 cents, so the refund costs 10 cents on top of the 10 cents the sale already cost. On the worked example above, that adds $463.20 a year, taking the bill from $13,479.12 to $13,942.32.

The fee on any card sale is a percentage of the amount plus a flat per-transaction fee, rounded to the cent on each transaction: fee equals amount times rate, plus fixed. On a $90 order at 2.9 percent plus 30 cents that is $2.61 plus $0.30, so $2.91. The Refund Cost Calculator then applies your processor's refund policy as three independent switches. Does the percentage come back? Does the fixed fee come back? Is there a new fee for running the refund? What is left after those three questions is the fee retained, and that is the real cost of the refunded order.

The output that matters is the second one, and it turns entirely on a denominator. Your fee bill for the month divided by gross volume is the nominal effective rate, and it barely moves as returns rise, because the fees and the volume shrink together. Your fee bill divided by the revenue that survived the refunds is the true effective rate, and it is the one you actually pay, because the money that stayed has to carry the whole bill. On the defaults those are 3.23 percent and 4.01 percent. Both are plausible numbers, so this page prints both and labels them rather than quietly picking one.

Average order value is derived from monthly volume and order count rather than typed in as a third input. Volume and transaction count are both printed on a statement, average order usually is not, and taking all three invites figures that contradict each other. Money is in integer cents, and the percentage is rounded per transaction the way a processor rounds it, because a merchant checking this page against a payout report will notice a cent. Restocking and return shipping are added per returned order and deliberately kept out of the rate: they are real costs, but they are not processing fees, and mixing them in produces a percentage that means nothing.

A partial refund is not a scaled down full refund. The fixed fee was charged once, in full, when the payment was accepted, and there is nothing in it to prorate. So the whole fee lands on whatever sliver of the order you keep. Refund $80 of a $100 order at 2.9 percent plus 30 cents and you keep $20 while carrying the entire $3.20 fee, which is 16.00 percent of the revenue retained. Refund $60 of a $90 order and the $2.91 fee sits on the $30 you kept, an effective 9.70 percent.

It gets worse where the processor also charges to run the refund. Refund $95 of a $100 order through a gateway that bills 10 cents a transaction and you carry $3.30 against the $5 you kept, which is 66 percent. Two partial refunds on one order cost that fee twice, because it is charged per transaction submitted rather than per order. A store that settles a complaint by refunding shipping, then a restocking allowance, then a goodwill credit, pays for each separately.

Processors differ most here, which is why the Refund Cost Calculator models the fixed fee as returnable only on a full refund. The one common structure that gave anything back on a partial refund was PayPal's pre-2019 policy, which returned the percentage prorated on the amount handed back and kept the fixed fee. If your agreement still works that way, set the switches yourself with the custom processor option and the calculator prices it. Every US policy verified for this page returns nothing on a partial refund at all.

There is one genuinely free reversal, and it is worth building a process around. Helcim states that "transactions that are voided do not incur any processing fees" while a refund applies the original fee, and Stripe recommends authorizing and capturing separately if you reverse orders soon after checkout, because cancelling an uncaptured payment costs nothing. The window is short, usually until the batch closes, but for a store that cancels unshipped orders it is the difference between the full fee and zero.

Return rates are published, so measure yourself against them. The National Retail Federation and Happy Returns reported on 15 October 2025 that 15.8 percent of US retail sales would be returned, worth $849.9 billion, against 16.9 percent and $890 billion the year before. Online is worse at 19.3 percent and holiday sales run about 17 percent. A merchant under 10 percent is well below the national picture, an online store between 15 and 20 percent is ordinary, and above 25 percent is a business model question rather than a payments one.

The rate you pay decides how much that return rate costs. Hold Northbrook Threads' $180,000 a month and 386 refunded orders constant and change only the pricing: at 2.9 percent plus 30 cents the refunds leave $13,479.12 a year behind, at Braintree's published US rate of 2.89 percent plus 29 cents it is $13,386.48, and at PayPal Checkout's 3.49 percent plus 49 cents it is $16,814.16, which pushes the real effective rate to 5.00 percent. The most expensive channel and the highest return rate are a bad combination, and they are the two things a merchant controls independently.

Ticket size decides how visible the problem is. A small ticket store, say $60,000 a month across 2,400 orders at a $25 average with a 5 percent return rate, runs a 4.12 percent nominal rate against a 4.34 percent true rate, a gap of only 0.22 points, because so little of its volume comes back. Northbrook Threads, at four times the ticket and four times the return rate, opens a 0.77 point gap. The gap scales with the return rate rather than the ticket.

Handling costs usually dwarf the fees, even though they stay out of the rate. Put $6.50 of restocking and $8.00 of return shipping on each of those 386 monthly returns and it is $67,164 a year, against $13,479.12 of retained fees, a total cost of refunds of $80,643.12. Nobody publishes a credible US average for either figure, so the Refund Cost Calculator leaves both at zero until you enter your own rather than inventing a benchmark.

Start with what cannot be fixed. No processor will start returning fees because you asked, and the policy is published rather than negotiated, so the fee retained on a refunded order is not a line you can argue down. What is negotiable is the rate underneath it, and that arithmetic lives on the effective rate calculator. Everything else here is a returns problem wearing a payments costume.

So the lever is the return rate. Take Northbrook Threads from 19.3 percent to 15 percent and the retained fees fall from $13,479.12 to $10,476.00 a year, which is $3,003.12. That is the small half of the prize. The large half is the sales: 4.3 points of 2,000 monthly orders at $90 is $7,740 a month, or $92,880 a year of revenue that stopped coming back through the door. Better size charts, better photography, tighter fulfilment accuracy and a shipping cutoff that stops the order arriving after it was needed are all cheaper than 4.3 points of anything.

Do nothing if the gap between your nominal and true rate is small. Under about a quarter of a point, which is where a low return rate or a small ticket puts you, refund cost is real but it is not the biggest number in your payments stack, and the time is better spent on a rate review. Act when the gap crosses roughly half a point, when one category or SKU produces a disproportionate share of the returns, or when partial refunds are routine, because that is where the fixed fee turns a 2.9 percent account into a double digit rate on the revenue retained.

One thing this page deliberately does not price. Chargebacks cost far more than refunds, because you lose the sale, the fee, the goods and a dispute fee of $15 to $20 on top, and the chargeback cost calculator prices those instead. Refunding a customer who would otherwise dispute is almost always the cheaper of the two, and the Refund Cost Calculator gives you the number to compare it against.