How Much Can I Discount?
Every product has a maximum discount before you lose money on every unit sold. Here is how to find yours.
The simple case (no fees or shipping)
Max discount = 1 − (Unit cost ÷ Regular price). A $30 item costing $8 to deliver can theoretically discount up to 73.3% before hitting zero contribution profit.
Why fees and shipping lower your ceiling
Percentage payment fees, fixed transaction fees and seller-paid shipping all eat into the price before cost is even subtracted — each one lowers your true maximum discount below the simple formula's answer.
Why "maximum" isn't "recommended"
Zero contribution profit means the sale contributes nothing toward fixed overhead like rent, salaries or software. Treat the maximum as a hard ceiling you should stay well clear of, not a target discount.