MarginCore blog

Ecommerce profit guides for operators who need better decisions.

Practical articles on margin, ROAS, COGS, attribution, product profitability, refunds, shipping, reporting, and weekly operating habits.

Profit basics · 8 min read

How to Calculate Ecommerce Profit Margin

Learn how ecommerce profit margin works, which costs to include, and why net margin is more useful than revenue alone.

Advertising · 9 min read

ROAS vs Profit: What Ecommerce Teams Should Track

ROAS can make campaigns look healthy while profit falls. Learn how to connect ad performance with real contribution margin.

Profit basics · 8 min read

Contribution Margin for Ecommerce: A Practical Guide

Understand contribution margin for ecommerce products, channels, campaigns, and growth decisions.

Cost accounting · 7 min read

What Is True COGS in Ecommerce?

A clear guide to ecommerce COGS, landed cost, product cost, packaging, freight, and how COGS affects margin.

Platforms · 8 min read

Shopify Profit Tracking: What to Measure

Learn how Shopify stores can track profit beyond top-line sales, including COGS, fees, ad spend, refunds, and product margin.

Advertising · 8 min read

Meta Ads Profitability for Ecommerce

Use profit, contribution margin, and break-even targets to understand whether Meta Ads campaigns are actually working.

Advertising · 8 min read

Google Ads Profit Tracking for Ecommerce

Connect Google Ads spend with ecommerce revenue, product margin, and contribution profit for better scaling decisions.

Advertising · 7 min read

Break-Even ROAS Formula for Ecommerce

Calculate break-even ROAS from contribution margin and use it to set smarter campaign targets.

Growth metrics · 8 min read

Customer Acquisition Cost in Ecommerce

Understand ecommerce CAC, blended CAC, channel CAC, and how acquisition cost connects to profit.

Growth metrics · 7 min read

Blended CAC vs Channel CAC

Compare blended CAC and channel CAC for ecommerce growth decisions, budget planning, and profitability.

Product analytics · 8 min read

Product Profitability Analysis for Ecommerce

Analyze ecommerce product profitability by SKU, channel, margin, ad spend, refunds, and contribution profit.

Operations · 7 min read

How Inventory Costs Affect Ecommerce Profit Margin

Learn how inventory carrying costs, landed cost, stockouts, and slow movers affect ecommerce profit.

Marketplaces · 7 min read

Marketplace Fees and Ecommerce Profit

Understand how Amazon, Etsy, Walmart, eBay, and other marketplace fees affect true ecommerce profitability.

Attribution · 8 min read

Attribution vs Actual Profit in Ecommerce

Learn why attribution and profit reporting often disagree, and how operators can use both without making poor decisions.

Reporting · 8 min read

How to Build a Weekly Ecommerce Profit Report

Create a weekly ecommerce profit report that helps operators act on revenue, margin, spend, refunds, and product performance.

Reporting · 7 min read

Ecommerce KPI Dashboard: Metrics That Matter

Build an ecommerce KPI dashboard around profit, margin, ROAS, CAC, product performance, and data health.

Profit basics · 6 min read

Net Profit vs Gross Profit in Ecommerce

Compare net profit and gross profit for ecommerce stores, and learn when each metric is useful.

Operations · 7 min read

How Refund Rate Impacts Ecommerce Profit

Refunds can erase product margin. Learn how to measure refund impact by product, channel, and campaign.

Operations · 7 min read

Shipping Cost Allocation for Ecommerce Profit

Learn how shipping costs affect ecommerce margin and how to allocate them in profit reporting.

Operations · 9 min read

How to Build a Profit Operating System for Ecommerce

Build a repeatable ecommerce operating system around data quality, margin visibility, weekly decisions, and accountability.