Official source
Used where a platform publishes a fee or pricing schedule. Presets stay editable because account, country and contract terms can differ.
Sources & verification registry
See which numbers are sourced, modeled or supplied by you.
Profit Per Order separates official platform references from formula logic and user-entered assumptions. A source date is a review date—not a promise that a third-party fee will never change.
Formula model
Math such as margin, break-even ROAS or reorder point is defined in code and tested. It is not sourced from a marketing benchmark.
User-supplied rate
Customs, carrier, return and contract-specific rates are inputs. The calculator does not pretend there is one universal authoritative number.
Current registry
Dated references used by the live product.
Official pages can change without notice. The weekly source monitor flags selected source changes for review; it never silently rewrites a financial rate.
Formula / methodology
Profit Per Order methodology and update policy
Defines deterministic calculation, source monitoring, versioning and correction rules.
Official platform source
Etsy — Fees and Taxes for Selling
Used to verify listing, transaction and Offsite Ads fee concepts. Account-specific charges can differ.
Official platform source
Etsy — Payment Processing Fees
Processing rates vary by seller bank-account country; calculator presets remain editable.
Official platform source
Shopify — Pricing and payment rates
Referenced for current plan/payment-rate context. The calculator fields are editable and are not a quote for any account or market.
Correction policy
Trust comes from visible uncertainty.
- No silent rate updates.A detected source change creates a review task; production values change only after verification.
- No universal-rate fiction.When a number depends on account, country or contract, the calculator keeps it editable and labels the limitation.
- No AI-owned math.Language models may organize report narrative; deterministic functions own the calculations.