Financial & Calculation Disclaimer

1. Preliminary Estimation Notice

All financial calculations, fee estimations, profit margin projections, return on investment (ROI) metrics, break-even price floors, and tax withholding figures generated by MarketplaceCalcs (marketplacecalculators.com) are provided solely for general informational and preliminary planning purposes.

While our engineering team works diligently to keep all 2026 fee schedules, size tiers, weight thresholds, category referral percentages, and fuel surcharges updated against official marketplace documentation, real-world fee debits applied to your seller account may vary based on exact ASIN dimensions, packaging weight variations, category classification changes, regional fulfillment routing, and seasonal surcharges.

2. Mandatory Verification with Official Marketplace Portals

MarketplaceCalcs does not replace official seller portal tools or financial reporting statements provided directly by e-commerce platforms. Sellers must independently audit and verify all fee structures, referral rates, storage rates, and shipping costs inside their respective seller portals prior to making inventory purchases, pricing adjustments, or commercial commitments:

• Amazon Sellers: Verify exact referral rates, FBA fulfillment tiers, and storage surcharges inside Amazon Seller Central .
• Walmart Marketplace Sellers: Confirm WFS fulfillment and category referral fee rates inside Walmart Seller Center .
• eBay Sellers: Check category Final Value Fee percentages and promoted listing ad rates inside eBay Seller Hub .

3. No Financial, Tax, Accounting, or Legal Advice

The content, formulas, estimates, and interactive tools hosted on marketplacecalculators.com do not constitute financial, legal, tax, accounting, or investment advice. No fiduciary or professional-client relationship is created through your use of this website.

E-commerce taxation (including state sales tax nexus, GST/VAT withholdings, income tax obligations, and import duties) is complex and highly dependent on seller location, business entity structure, and international trade laws. You should consult a licensed Certified Public Accountant (CPA), tax professional, or legal counsel regarding your specific financial obligations.

4. Non-Affiliation & Trademark Disclaimers

MarketplaceCalcs is an independent third-party software suite. MarketplaceCalcs is not affiliated, associated, authorized, endorsed by, or in any way officially connected with Amazon.com, Inc., Walmart Inc., eBay Inc., or any of their subsidiaries or affiliates.

The trademarks Amazon, FBA, Fulfillment by Amazon, Amazon Seller Central, Walmart, WFS, Walmart Fulfillment Services, eBay, Final Value Fee, and related brand names, logos, emblems, and registered trademarks belong exclusively to their respective trademark holders. Reference to these commercial marks is made solely for descriptive and identification purposes under nominative fair use guidelines.

5. Limitation of Liability

Under no circumstances shall MarketplaceCalcs, its creators, maintainers, operators, or editorial team be liable for any direct, indirect, incidental, consequential, special, or punitive damages arising from your reliance on calculation results, fee changes, software bugs, site downtime, or financial decisions made based on outputs from this website.

By using our calculators, you acknowledge that financial modeling carries inherent operational risk and agree to hold MarketplaceCalcs harmless from any commercial losses, margin compression, or shipping penalties.