Printful profit formula you can reuse
A reliable 2026 workflow is: selling price minus product cost minus marketplace fees minus payment processing equals net profit. Sellers often miss at least one fee layer, which makes margins look better than reality. When you model every cost up front, you can choose pricing that supports both day-to-day cash flow and seasonal discounts.
For Etsy, include listing, transaction, and payment processing. For Shopify, include payment processing and any transaction fee that applies to your plan. Keep each channel separate so you can spot where the same SKU earns more take-home profit.