Amazon FBA Margin Calculator

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

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)

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

Stdin pipe

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

With DG flag

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

Input JSON Format

[
  {
    "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

Single product

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)

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

Stdin pipe

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

With DG flag

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

Node.js (no npm installs required — stdlib only)

CJ product data: SKU, price (USD), weight (grams), target AED price

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