Markup is profit as a share of your cost; margin is the same profit as a share of the price. Price a cost either way, check a price you already have, or convert one percentage into the other.
1Markup and margin
Example: $100 of cost. Pick what you know, change any number.
PriceExample
$150.00for $100.00 of cost
Price $150.00: markup 50% on cost, margin 33.33% on price, gross profit $50.00.
One profit, two percentagesDrawn to scale: cost and price on one dollar scale
Cost
Profit
Price = cost
Markup
50%on cost
Margin
33.33%on price
Gross profit
$50.00× 1.5
$100.00 × (1 + 50%)= $150.00
Already showing the example.
Margin here is gross margin: the price minus the cost you entered. Overhead, the truck and your own pay still have to come out of it.
Why the two numbers differ
A 50% markup is only a 33.33% margin.
To earn a 50% margin instead you would need a 100% markup: $200.00 on this cost.
Conversion table
Markup → margin
Markup on cost
Margin on price
10%
9.09%
20%
16.67%
25%
20.00%
30%
23.08%
40%
28.57%
50%
33.33%
60%
37.50%
75%
42.86%
100%
50.00%
150%
60.00%
200%
66.67%
Margin → markup
Margin on price
Markup on cost
10%
11.11%
15%
17.65%
20%
25.00%
25%
33.33%
30%
42.86%
35%
53.85%
40%
66.67%
50%
100.00%
60%
150.00%
70%
233.33%
80%
400.00%
90%
900.00%
How the math works
In this tool, markup means profit divided by cost and margin means profit divided by price — the gross margin of the item or job, not the company’s net profit. Every figure is computed at full precision and rounded only for display.
Price from markupcost × (1 + markup)SBA’s pricing worksheet: cost × markup % gives the markup; add it to the cost. $100 × 1.5 = $150.
Price from margincost ÷ (1 − margin)A divisor, not a multiplier: $100 ÷ 0.60 = $166.67 for a 40% margin.
Gross profitprice − costThe same dollars whichever percentage describes them.
Rounded pricesround up to the step, then re-measure$250 at a 35% margin is $384.62; rounded up to $385 it earns 35.06%.
Before you use the number
Markup and margin describe the same dollars. A 50% markup is a 33.33% margin; a 50% margin needs a 100% markup.
Gross margin is not net profit. Margin here is the price minus the cost you entered; overhead, the truck and the owner’s pay must be covered out of it. Price below total cost per unit and, in SBA’s words, the business is losing money.
Cost means what you actually paid, including any sales tax you paid as the consumer of the materials. Whether you pay or collect sales tax depends on your state and the contract type.
A 100% margin is impossible unless the cost is zero, so margins of 100% or more are refused. Negative figures are allowed and shown as a loss in red.
No markup or margin is recommended here. No government source reviewed gives a typical markup or margin for plumbing, HVAC or electrical work; the right number comes from the margin your shop needs.
Sources
Opened and checked October 4, 2026. The conversion table and worked examples are the site’s own arithmetic.
Markup is on cost, margin is on price. Formulas, a conversion table, the classic mistakes and a water heater swap with labor, parts, tax and card fees.
A flat parts multiplier and a sliding markup scale compared: the margin each really leaves, the tier-boundary trap, and how sales tax changes the base.