Markup is not margin
Materials Markup Calculator
Add ten per cent to materials and you keep 9.1. To make a 20 per cent margin you have to add 25.
Materials Markup Calculator
A markup is measured on what the materials cost. A margin is measured on what you charged. They are never the same number, and the difference always goes the same way.
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The arithmetic, both ways
Margin equals markup divided by one plus markup. Add 10 per cent and you keep 9.1. Add 50 and you keep 33. Double it and you keep half.
Markup equals margin divided by one minus margin. So a 20 per cent margin needs 25 per cent added, and a third needs a half.
If your markup only covers collecting, storing and carrying the materials and the bits that get damaged, you are not making anything on them. You are being reimbursed.
Every markup, in a table
The workbook prices a whole job and carries a table of markups against the margin each one actually produces.
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