Stripe Fee Calculator

The calculation itself

Stripe's standard online card pricing is a percentage plus a fixed amount: fee = amount × rate + fixed. The net received is amount − fee.

The fixed component is what makes the effective rate vary with order size. On a large order it is negligible; on a small one it dominates, and the effective rate can be several times the headline percentage.

An example

A $58 order at 2.9% + $0.30: the percentage is $1.68 and the fixed is $0.30, so the fee is $1.98 and $56.02 arrives. The effective rate is 3.41%, not 2.9%.

Now a $12 order: $0.35 plus $0.30 is $0.65, an effective 5.42%. And a $340 order: $9.86 plus $0.30 is $10.16, an effective 2.99%.

So the same pricing produces effective rates from 2.99% to 5.42% across a normal order range. A business modelling payment costs at 2.9% understates them by 18% on its average order and by 87% on its smallest.

Where the figure deceives

The standard rate covers domestic cards only. International cards add a percentage, currency conversion adds another, and both apply on top of the base rate rather than replacing it, so a foreign card can cost half again as much.

Refunds do not return the fee. Refunding a $58 order costs the $58 plus the $1.98 already taken, so a refunded sale is a $1.98 loss rather than a wash.

Acting on it

Calculate the effective rate at your actual average order value rather than using the headline. That single number is what belongs in the margin model, and it is always higher than the quoted rate.

Then look at the small-order tail. If a meaningful share of orders sit under $20, the fixed component is doing real damage, and a minimum order value or a bundling nudge is worth more than any rate negotiation.

Where the fixed fee actually bites

The fixed component is the same on every transaction regardless of size, which makes it a regressive cost. At $58 it is 0.52% of the order; at $12 it is 2.5%; at $5 it is 6%.

For a business selling low-value digital goods or accessories, that arithmetic can be the difference between a viable product and one that loses money on payment costs alone. A $4 add-on at 2.9% + $0.30 costs $0.42 to process, 10.5% of the sale.

The responses that work are structural rather than negotiated: raise the minimum order, bundle small items so they travel inside a larger transaction, or move to a payment method with a lower fixed component for those orders. Rate negotiation moves the percentage and leaves the fixed fee alone, which is why it helps least exactly where the problem is worst.

One further point on disputes: Stripe charges a dispute fee on top of the reversed amount, and on most accounts it is not returned even when the dispute is won.

That makes the true cost of a disputed $58 order the $58, plus the $1.98 already taken, plus the dispute fee, commonly $15, which is more than a quarter of the order value before any fulfilment cost is counted.