Parts Margin Calculator

Margin vs markup

Margin is profit ÷ selling price. Markup is profit ÷ cost. 30% margin means sell at cost ÷ 0.70, not cost × 1.30. The calculator uses margin the way garages quote it.

• Retail margin : often 30–40%
• Trade / professional margin : often 15–25%
• Always know your real cost including delivery