Margin Ruler

Margin Leak Calculator for Amazon Seller Return Cost (United States)

Margin Leak Calculator for Amazon Seller Return Cost in United States. Start with a national planning baseline, then choose a city to open the regional planning page.

Amazon FBA is active. Other marketplace modules stay marked as planned until audited.

Published fee inputs, dated assumptionsNo account or emailPrivate unless you save
Methodology

Margin Leak Calculator. Estimates per-order margin after product cost, platform fees, and shipping, then compares the result to a target margin.

Fee basis: source-state planning estimate; modeled fee basis is under review and not a Seller Central reconciliation. Last source-state review: 2026-06-07.

Source-state status

planning estimate. Planning estimate — fee basis is source-dated and under review, not a Seller Central reconciliation.

Modeled in the estimate

  • fba fulfillment fee 2026 — Planning estimate: this fee basis is not independently primary-source verified (secondary_only) and its source date has passed. Treat as directional, not a Seller Central reconciliation. report_mode
  • referral fee 2026 — Planning estimate: this fee basis is not independently primary-source verified (secondary_only) and its source date has passed. Treat as directional, not a Seller Central reconciliation. report_mode

Review the Amazon seller-fee source-state register →

Read the formula, inclusions, exclusions, and fee-category audit →

Calculator
Inputs
Enter your operating figures for a planning estimate based on published rate cards and industry midpoints.
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Result
Fill in your operating figures above to get a planning estimate.
Review vendors before committing — no obligation.

This page is the city-agnostic starting point used for planning and AI-agent handoff. Pick a city below to open the regional planning page. The calculator uses the same source-dated fee logic unless local calibration is shown.

Choose your city