Amazon FBA Margin Calculator

Calculates Amazon UAE FBA fees, net margin, and DG risk for CJ Dropshipping products, ranking by margin % and generating detailed markdown and JSON reports.

skill-fba-margin-calculator

Version: 1.0.0 | Owner: GitHub Ops | Created: 2026-03-09

What It Does

Calculates Amazon UAE FBA fees, net margin, and DG risk for CJ Dropshipping product candidates. Ranks results by margin % and outputs a markdown report + JSON.

Extracted from the Tech1Mart FBA pilot selection workflow that ran 2026-03-08 and 2026-03-09.

When to Use

• After running skill-dropshipping-sourcing (CJ product lookup)
• Before ordering samples — confirm margin viability
• When comparing multiple SKUs for Amazon UAE FBA launch

Prerequisites

• Node.js (no npm installs required — stdlib only)
• CJ product data: SKU, price (USD), weight (grams), target AED price

Usage

Single product

bash

node skills/skill-fba-margin-calculator/calc.js \
  --sku CJLE2170569 \
  --name "Ring Light Phone Stand" \
  --price 12.96 \
  --weight 400 \
  --target 129 \
  --shipping 4

Batch (JSON file)

bash

node skills/skill-fba-margin-calculator/calc.js \
  --input products.json \
  --output output/fba-report

Stdin pipe

bash

cat products.json | node skills/skill-fba-margin-calculator/calc.js

With DG flag

bash

node skills/skill-fba-margin-calculator/calc.js \
  --sku CJYS1240831 --price 12.72 --weight 150 --target 99 --dg

Input JSON Format

json

[
  {
    "sku": "CJLE2170569",
    "name": "Ring Light + Phone Stand",
    "cj_price_usd": 12.96,
    "weight_g": 400,
    "target_aed": 129,
    "shipping_usd": 4,
    "dg_risk": false,
    "referral_pct": 8
  }
]

Optional fields: shipping_usd (default 3.5), dg_risk (default false), referral_pct (default 8%).

Output

• Ranked markdown table by margin %
• Detail breakdown per SKU (landed cost, FBA fee tier, referral fee, net margin)
• Verdicts: ✅ FBA-safe / 🟡 Marginal / ❌ Too thin / ⚠️ DG Risk (WooCommerce-only)
• --output flag: writes .md + .json files

FBA Fee Tiers (Amazon UAE, Q1 2026 estimates)

Size Class	Max Weight	Est. Fee
Small Standard	150g	10 AED
Standard S	350g	13.5 AED
Standard M	700g	16.5 AED
Standard L	1kg	20 AED
Large Standard	2kg	26 AED
Oversize	2kg+	38 AED

Plus: 8% referral fee (electronics) + ~0.75 AED/unit storage.

Flags

Flag	Description
--input FILE	JSON file with product array
--output BASE	Write BASE.md + BASE.json
--exchange RATE	USD→AED rate (default 3.67)
--sku	Single SKU mode (with --price, --weight, --target)
--price USD	CJ price in USD
--weight GRAMS	Product weight in grams
--target AED	Target sell price in AED
--shipping USD	CJ shipping cost in USD (default 3.5)
--referral PCT	Referral fee % (default 8)
--dg	Flag product as Dangerous Goods (recommends WooCommerce-only)

Notes

• FBA fees are estimates — verify final numbers via Amazon Seller Central FBA Revenue Calculator before ordering samples
• Exchange rate defaults to 3.67 (AED/USD peg) — adjust if needed
• DG risk applies to: Li-ion batteries, aerosols, liquids. Always check before sending to FBA.
• Minimum viable margin: >25% AND >30 AED net for FBA to be worthwhile