Effective August 23, 2026
Terms and disclaimer
Informational estimates
Calculators and CSV results are informational estimates intended to help sellers understand business activity. They are not accounting, tax, legal, investment, or financial advice and are not official statements. Verify important figures against your Whatnot Ledger, seller statements, receipts, and qualified professional advice.
Your responsibility
Results depend on the data and assumptions supplied. You are responsible for confirming report completeness, cost of goods, shipping expenses, fee rates, taxes, refunds, promotions, and other costs before making business or reporting decisions.
No affiliation
Seller Margin Lab is an independent product. It is not affiliated with, endorsed by, sponsored by, or operated by Whatnot. “Whatnot” and related names or marks belong to their respective owners.
Availability and accuracy
The site is provided on an “as available” basis without a guarantee that it will always be available, error-free, or compatible with every past or future report format. Marketplace rules, export columns, promotions, and fees can change without notice.
External services
External links and services are provided for convenience. Their content, availability, terms, and practices are outside this site’s control.