Markup vs margin — the difference that trips up most owners
Markup is profit as a % of cost. Margin is profit as a % of selling price. A 50% markup is only a 33.3% margin — confusing them is the #1 reason small businesses under-price.
Conversion: margin = markup / (1 + markup). Want a 40% margin? Mark up your cost by ~66.7%.
Use the target-margin solver to back-calculate the cost ceiling you can pay a supplier and still hit your margin goal.