Marketplace Fee & Profit Calculator for Shopee/Lazada Sellers
See your real profit per order and per SKU after commission, transaction fees, vouchers and shipping, using the fee rates from your own Seller Centre.
Economics
- Pricing example
- $12 lifetime Pro (free version: up to 5 SKUs, no CSV export)
- Daily math
- 2 sales a day x $12 = $24/day. If 2% of targeted visitors buy (2% is an assumption for planning, not a measured rate), that needs about 100 targeted visitors a day.
- Target if you hit the daily math
- Target: $600 - $750 / month if the daily math is hit
Audience and urgency
Audience: Small Shopee, Lazada and TikTok Shop sellers in Malaysia and the rest of Southeast Asia who price products in a spreadsheet or in their head.
Urgency: Commission, transaction, service and shipping fees stack up, and campaign vouchers change the numbers again. Sellers often only find out a product sold at a loss when the payout arrives. A per-SKU calculator using their own fee rates answers 'can I afford this voucher?' before they join a campaign.
MVP scope
- ✓ Per-SKU form: cost price, selling price, packaging cost, and the seller's own commission, transaction and service fee percentages (editable presets per platform with a 'last checked' date the seller sets)
- ✓ Voucher, free-shipping subsidy and bundle-discount inputs that recalculate profit per order and margin % instantly
- ✓ Break-even price and 'maximum voucher I can give' per SKU
- ✓ CSV import/export and a bulk margin table that highlights loss-making SKUs in red
- ✓ Stripe Payment Link that unlocks unlimited SKUs and CSV export; all data stays in the browser (localStorage)
Omitted features
- - Do NOT connect to marketplace seller APIs or scrape Seller Centre in Day 1
- - Do NOT hard-code platform fee rates as facts; ship editable presets the seller confirms
- - Do NOT build inventory, order or accounting features
Suggested stack
- Frontend
- React + Vite + Tailwind CSS
- Backend or API
- None: all calculations run in the browser; localStorage for saved SKUs
- Payments
- Stripe Payment Links (supports MYR) or Lemon Squeezy
- Hosting
- Vercel or Netlify (free tier to start)
Repository metadata
- Blueprint ID
marketplace-profit-calculator- Category ID
ecommerce_tools- Monetization ID
one_time
Day-one distribution
Channels
- Malaysian online-seller Facebook groups and Telegram channels (follow each group's promotion rules)
- Reddit r/ecommerce and r/malaysia (check self-promotion rules first)
- Short TikTok/Reels video working through one voucher example with clearly labelled demo numbers
Reddit strategy
Post a worked example titled 'How to check if a voucher still leaves you a profit' using labelled demo numbers, and link the free 5-SKU version at the end.
Cold outreach or directory hook
Offer free Pro licences to 10 Malaysian seller-education YouTubers or course runners in exchange for an honest walkthrough video.
Search keywords
shopee profit calculator, lazada fee calculator, marketplace margin calculator malaysia
One-shot master prompt
Build a single-page "Marketplace Profit Calculator" web app in React with Tailwind CSS. Core requirements: 1. SKU table where each row has: SKU name, cost price, selling price, packaging cost, commission %, transaction fee %, service fee %, seller-paid shipping, and voucher (fixed or %). Fee presets for "Shopee", "Lazada" and "TikTok Shop" are editable defaults with a "rates last checked on" date field; never present them as official. 2. Live results per row: total fees, profit per order, margin %, break-even selling price, and the maximum voucher that keeps profit at or above a target margin the user sets. Loss-making rows turn red. 3. Bundle simulator: pick 2-3 SKUs, set a bundle price and see combined fees and profit. 4. CSV import and export (Papa Parse). Free tier allows 5 SKUs; a "Go Pro" button opens a Stripe Payment Link ($12 one-time) and Pro is unlocked with a licence code stored in localStorage. 5. Currency selector (MYR, SGD, IDR, PHP, THB, VND, USD), mobile-friendly layout, and a visible note: "Check fee rates in your Seller Centre; this tool does not fetch them."
Comparable products
Published 2026-10-08.