Difference between margin and markup
Margin vs markup (comparison)
Margin and markup are two different ways of looking at your profit on a sale.
They both focus on the same amount of money – the difference between your buying and selling prices. And they both express that amount as a percentage. However, margin shows it as a percentage of income while markup shows it as a percentage of costs.

Your markup is always bigger than your margin, even though they refer to exactly the same amount of money.
Markup – tells you how much you bump up the prices of the things you sell.
Margin – tells you what percentage of income is gross profit.