Download Our Contribution Margin Calculator Spreadsheet

62% of SKUs aren't profitable. Not marginal performers. Actively losing money on every sale.

Most ecommerce operators are celebrating "best-sellers" while contribution margin evaporates. They're staring at gross margin thinking they understand profitability—while variable costs silently destroy their business.

This spreadsheet exposes the truth.

🎯 What You'll Get:

A comprehensive contribution margin calculator designed specifically for Australian ecommerce operators. Calculate true product profitability at the SKU level—accounting for every variable cost that gross margin ignores.

✓ Calculate true product profitability by SKU

✓ Account for all variable costs (shipping, marketing, processing, returns)

✓ Identify which "best-sellers" are actually profit vampires

✓ Allocate marketing spend accurately by product

✓ Compare contribution margin across channels (DTC, Amazon, wholesale)

✓ Model pricing changes and cost scenarios

✓ Build data-driven product portfolio decisions

📊 What's Inside:

• Product Cost Architecture – COGS, packaging, handling, and landed costs

• Variable Cost Rates – Payment processing, marketplace commissions, shipping tiers

• Marketing Allocation Framework – Weighted attribution by product revenue

• Return Cost Calculator – Account for the true cost of returns by category

• Contribution Margin Formula – Calculate CM$ and CM% per unit

• SKU-Level Profitability Analysis – Rank every product by true margin

• Channel Comparison Tool – Compare CM across DTC, Amazon, and wholesale

• Scenario Planning – Model price changes, cost reductions, and marketing shifts

• Benchmark Ranges – Realistic targets by category for Australian ecommerce

🇦🇺 Built for Australian Ecommerce:

• AUD currency formatting

• Australian marketplace fees (Amazon AU, eBay AU)

• Local shipping cost structures

• Category-specific benchmarks (Beauty 40-55%, Apparel 35-50%, Electronics 20-35%)

• Payment processing rates for Australian gateways

💡 Why This Matters:

Gross margin is a vanity metric. It excludes shipping, fulfillment, marketing, payment processing, and returns—the costs that actually determine profitability.

For a typical Australian ecommerce business at $2M-$5M revenue, the gap between 45% gross margin and 10% net margin represents six figures in hidden losses.

Contribution margin reveals:

→ Which products actually generate profit (not just revenue)

→ Where your marketing spend is burning cash

→ Which "best-sellers" are destroying your business

→ How much each product can afford for customer acquisition

→ Which channels deliver real profitability

→ Whether price increases or cost cuts will actually work

The 80-90% ecommerce failure rate? It's not from lack of sales. It's from selling unprofitable products while gross margin creates the illusion of success.

⚡️ Stop Flying Blind:

You can't fix what you can't measure. This calculator strips away vanity metrics and exposes SKU-level truth.

Use the Profit Anatomy Protocol to:

• Build your contribution margin dashboard in Week 1

• Identify profit vampires in Week 2

• Reprice for reality in Week 3

• Reallocate marketing spend in Week 4

Then install real-time margin monitoring to prevent future profit erosion.

⚡️ Free Download – No email required.

From the team at Uncommon Insights, helping Australian ecommerce operators master unit economics and build sustainable, profitable businesses.