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Amazon FBA vs FBM Cost Comparison Worksheet

Compare fulfillment-mode contribution with the costs you actually pay.

Amazon US

Included in the $9.00 Shelf Kit

Agent/API — $0.50
Review-first
Every output stays a draft. No credentials
No seller-account login required. Private delivery
Inputs expire after 24 hours. Clear recourse
Digital-service refund policy.

What you receive

  • FBA and FBM variable cost per unit
  • Per-unit and monthly contribution by mode
  • Higher-contribution mode under supplied numbers
  • Monthly advantage and crossover-volume arithmetic
  • Downloadable SKU comparison XLSX

Who it is for

Amazon sellers and agencies comparing fulfillment modes without pretending a generic fee schedule matches their account.

Delivery: usually a structured result, workbook, or ZIP depending on the tool.

How it stays safe

Friday performs arithmetic only on the prices, fees, costs, fixed expenses, and monthly units you supply. It fetches no Amazon fee schedule, forecasts no demand, accesses no account, changes no fulfillment setting, and does not publish listings. Omitted fees, taxes, returns, seasonality, capacity, service levels, and cash timing can change the decision; the higher-contribution label is not financial or operational advice.

Synthetic sample

See the deliverable structure before buying

{
  "sku": "NORTHWIND-CHARGER",
  "referral_fee_per_unit": 4.5,
  "fba_variable_cost_per_unit": 18.23,
  "fbm_variable_cost_per_unit": 21.5,
  "fba_monthly_contribution": 3468.45,
  "fbm_monthly_contribution": 2522.45,
  "recommended_mode_by_supplied_costs": "fba",
  "monthly_advantage": 946.0,
  "artifact_name": "fba-vs-fbm-cost-comparison.xlsx",
  "safety": "Seller-supplied arithmetic only; no live fees, demand forecast, account change, or financial recommendation."
}

This sample uses synthetic facts. Your output is generated only from the facts you submit.

Agent API and x402 details

POST /v1/amazon/fulfillment/fba-vs-fbm-costs

Exact x402 price: $0.50. Use the public OpenAPI schema and Base USDC payment flow. The response returns a private job URL and temporary token.

Open the API documentation →

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