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 4Batch (JSON file)
node skills/skill-fba-margin-calculator/calc.js \
--input products.json \
--output output/fba-reportStdin pipe
cat products.json | node skills/skill-fba-margin-calculator/calc.jsWith DG flag
node skills/skill-fba-margin-calculator/calc.js \
--sku CJYS1240831 --price 12.72 --weight 150 --target 99 --dgInput 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)
--outputflag: writes.md+.jsonfiles
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