Foundational Financial Math
Profit Margin vs. Markup: The Critical Distinction Founders Must Know
One of the most dangerous financial mistakes in business is conflating Profit Margin with Markup. Setting a 30% markup on a $100 wholesale product produces a selling price of $130, but yields a profit margin of only 23.08%—which can easily push an e-commerce brand into the red once ad spend and merchant fees are deducted.
Markup to Margin Fast Conversion Matrix
| Cost of Goods (COGS) | Markup Percentage | Retail Selling Price | Gross Profit ($) | True Profit Margin (%) |
|---|---|---|---|---|
| $100.00 | 15.0% | $115.00 | $15.00 | 13.04% |
| $100.00 | 25.0% | $125.00 | $25.00 | 20.00% |
| $100.00 | 50.0% | $150.00 | $50.00 | 33.33% |
| $100.00 | 100.0% (Keystone) | $200.00 | $100.00 | 50.00% |
| $100.00 | 300.0% | $400.00 | $300.00 | 75.00% |
Margin Formula
((Price - Cost) / Price) × 100
Expressed as a fraction of the selling price.
Markup Formula
((Price - Cost) / Cost) × 100
Expressed as a percentage added to COGS.
% Change Formula
((New - Old) / Old) × 100
For YoY growth or discount adjustments.
Connected Business Tools:
Planning your product pricing strategy? Simulate net profitability with ad spend on our Shopify Profit Calculator, or model subscription growth with our SaaS MRR & Churn Calculator.