Seller Profit Guard · How it works · CSV privacy

Etsy SKU cost library

Create a browser-saved or exportable SKU cost table for material, packaging, labor, shipping, extra costs, and target margin so repeat profit checks do not treat missing costs as zero.

Maintained by Seller Profit Guard Editorial Team. Last reviewed: 2026-07-12.

The cost fields worth maintaining

A useful SKU record separates material, packaging, labor minutes, labor rate, seller-paid shipping, extra transaction cost, other variable cost, and target margin. Combining every cost into one unexplained number makes supplier or workflow changes harder to diagnose.

Variation-level records matter when size, finish, personalization, weight, or bundle quantity changes the real cost. The cheapest variation should not silently supply the cost assumption for every order row.

  • Use one stable SKU for each materially different variation.
  • Update records when suppliers, packaging, weight, or labor time changes.
  • Export a private backup before clearing browser storage.
  • Treat the library as confidential business information.

How the library improves profit checks

A cost library turns missing-cost rows into visible exceptions. It also makes weekly checks faster because the seller does not need to re-enter the same assumptions for every CSV export.

The library is not an inventory ledger or accounting system. It is a practical source of editable assumptions for SKU-level contribution review.

Sources and further reading

Related Seller Profit Guard tools

Use the interactive tool

Enable JavaScript to open the calculator and process browser-local inputs. The explanatory content and source links remain available without JavaScript.

Related guide: Read the SKU-level profit guide.

This tool provides operating estimates, not tax, accounting, legal, financial, or marketplace-policy advice. Verify current official sources and your own records before changing prices or operations.