Commission and fixed fees are both real
Commission is a percentage of selling price. Fixed fees apply per order.
Both must be in your model to avoid margin surprises.
Use zero‑commission carefully
Some categories or price bands offer zero commission. Always validate in your seller portal.
Keep a threshold in your model so you can see where commission kicks in.
Shipping can erase profit
Forward and return shipping fees quickly reduce margin if ignored.
Use average shipping costs from recent orders for realistic pricing.
Next step
Apply this guide using our calculator tools.