Markup vs. Margin Calculations
Master the single most commonly confused calculation on the contractor Business & Finance exam.
Short answer
Markup is calculated on cost; margin is calculated on selling price. A 50% markup on cost produces roughly a 33% gross margin. Confusing the two systematically underprices work, which is why the exam tests it directly.
01
Two different denominators
Markup uses cost as the base: $$Price = Cost \times (1 + Markup)$$. Margin uses price as the base: $$Margin = (Price - Cost) / Price$$.
Every markup-versus-margin error traces back to using the wrong denominator. Write the formula down before computing.
02
Convert between them deliberately
To reach a target margin, divide cost by one minus the margin: $$Price = Cost / (1 - Margin)$$. That is not the same as multiplying cost by one plus the margin.
Example: on $10,000 of cost with a 25% target margin, price is $13,333, not $12,500. The difference is pure profit erasure.
03
Why the exam cares
A contractor who marks up 20% believing it yields a 20% margin is short on every job, and the shortfall compounds with volume.
- Markup is applied to known cost
- Margin is measured against revenue
- Target margin requires the division formula
- Overhead recovery must be included in cost or markup
- Volume multiplies any pricing error
04
Drill it until it is automatic
Work problems in both directions: given cost and markup find price and margin, then given cost and target margin find price and markup.
Doing both directions repeatedly is what makes the distinction stick under exam pressure.
Official-source check
Requirements, references, and testing procedures can change. Verify current details with Florida DBPR, the CILB, and the current exam vendor before acting.
Candidate questions
Frequently asked questions
Is 50% markup the same as 50% margin?
No. A 50% markup on cost yields about a 33.3% gross margin.
Which one should a contractor use?
Price with markup for practicality, but measure results in margin. Both must be understood for the exam.
Where does overhead fit?
Overhead must be recovered either inside cost or through the markup applied. Ignoring it turns apparent profit into a loss.