Capabilities

MarginIQ turns a raw cost sheet into a ranked margin ledger. Enter your product costs, sale price and platform — it computes the true per-unit contribution after fees, shipping and returns, then flags the items that look profitable but quietly drain your margin. Works for e-commerce products, freelance day rates, and side-by-side comparisons.

True margin engine

Contribution after platform fees (Etsy, Shopify, Amazon FBA, eBay, TikTok), freight, and return rate — not just price minus cost.

Use: catch loss-making bestsellers before they drain your cash.

Break-even solver

Back-solves the minimum sale price to hit a target margin, accounting for all costs and fees.

Use: set floor prices before a promotion or marketplace deal.

Batch & export

Process multiple SKUs at once and export the full ranked ledger to CSV in one click.

Use: weekly margin review across your entire catalogue.

Freelance rate calculator

Switch to freelance mode to calculate effective day rates after taxes, downtime, and platform cuts.

Use: quote confidently without underselling your time.

Comparator

Compare up to 4 scenarios side-by-side — pricing strategies, platform choices, or cost structures.

Use: decide which marketplace gives you the best net return.

Local history

Every calculation is saved locally in your browser. Revisit past analyses without re-entering data.

Use: track how margin on a product evolved over time.

How it works

Core functions

calcProduit()

In: cost, price, platform, shipping, returns
Out: net margin €, margin %, break-even price
Benefit: one true number per SKU, per platform

calcBatch()

In: multiple SKU rows
Out: ranked ledger sorted by margin contribution
Benefit: full catalogue overview in seconds

breakEvenPrice()

In: cost stack, target margin %
Out: minimum viable sale price
Benefit: safe floor price before any promotion

calcFreelance()

In: day rate, tax rate, downtime %, platform fee
Out: effective net hourly and annual income
Benefit: quote with confidence, never undersell

Technical specs

Type

HTML

Install

None

Offline

Yes

Browser

Evergreen

Dependencies

Zero

File size

84 KB

Single self-contained .html file. Open locally — no upload, no telemetry, data never leaves your device.

Screenshots

E-commerce margin calculator — Shopify, Etsy, Amazon FBA

Platform comparator — net margin ranked across all marketplaces

Batch SKU ledger ranked by margin contribution

FAQ

Where does my cost and price data go?

Nowhere. MarginIQ is a single HTML file that runs entirely in your browser. No account, no upload, no server — your numbers never leave the device. Local history is saved to your browser’s localStorage only.

Which platforms does it support?

Etsy, Shopify (native payment), Amazon FBA, eBay, TikTok Shop, and direct sales. Platform fees are editable, so you can adjust for any marketplace or custom commission structure.

Can I use it offline?

Yes. Once downloaded it needs no internet connection. Open the file on a plane, in a warehouse, anywhere. There are no CDN calls or external dependencies.

Does it work for freelance work, not just products?

Yes. Switch to Freelance mode to calculate your effective day rate after taxes, downtime, and platform fees. The comparator lets you run up to 4 scenarios side-by-side.

What do I get after purchase?

A single self-contained .html file (84 KB), lifetime access to every future version, and no subscription. Download it, save it anywhere, share it with your team.