What does a return actually cost you?
Ask most founders what a return costs and they'll say "the refund." The real number, all-in, runs $10 to $65, and only about 48% of returned items resell at full price. Build the stack, see your true cost per return, and put it where it belongs: on the P&L.
How the cost of a return is calculated
All-in cost per return equals reverse shipping, plus handling, plus the payment fee you do not get back, plus recovery loss: the unit comes back worth less than you sold it for, and only about 48% of returned items resell at full price. The calculator scales that to an annual returns line for your P&L.
Returns hit twice: the refund and the recovery loss. Feed your number into the DTC profitability calculator to see what it does to EBITDA, and into the max allowable CAC calculator, since returns quietly lower contribution margin per order. The rest of the free DTC calculators are built on the same per-order math.