Markup vs. Margin in Construction Bids: The Math Error That Eats Profit
Markup is applied to cost to set the selling price. Margin is the profit as a percentage of the selling price. They're different numbers, and contractors who conflate them chronically underbid. A 20% markup is not a 20% margin — it's a 16.7% margin. Over a year, the gap is real money. Here's the math, the common mistakes, and the fix.