Marketplace Fee Decoder

Marketplace Fee Decoder: practical plan

Fee audit worksheet

Audit steps

Select 20 recent orders across sizes and return outcomes. Match fees to the same order ID and period. Compare official schedules with actual statements, and check dimensional weight, category assignments, discounts, refunds and tax treatment.

Decision

Calculate net contribution per order and by SKU. Flag unexplained differences, not just large fees. Ask platform support with order-level evidence where amounts do not reconcile.

Controls

Use current official fee tables, record retrieval date and region, and rerun after product packaging or category changes. Do not rely on third-party estimates as final accounting.

Measurement and review

Record the baseline, source, date range, denominator and owner. Use one primary measure plus quality guardrails; compare like-for-like cohorts and disclose missing data. Treat estimates as scenarios, not observed outcomes.

Risks and controls

Check relevance, consent, disclosure, workload and downside before scaling. Keep an evidence trail, obtain human review for material commitments, and pause if trust, quality or compliance signals deteriorate.

Next steps

1. Confirm the goal, audience and available capacity.
2. Gather the minimum evidence for a first test.
3. Assign an owner, budget and review date.
4. Run a small pilot, record outcomes and decide whether to iterate, expand or stop.