Plumbing Markup vs Margin Calculator
Your flat rate book is built on markup or margin. Make sure you know which one.
🔄 I Know My...
Enter a markup or margin and we'll calculate everything else.
💰 Job Cost
Your total cost on this plumbing job (labor + materials + overhead). Adjust to see real dollar impact.
Enter jobs per month to see the annual impact of confusing markup with margin.
⚡ The Real Difference
This is what happens when you confuse the two. Same percentage, very different results.
Quick Reference: Common Conversions
| Markup | Margin | $350 Cost → Price |
|---|---|---|
| 20% | 16.7% | $0 |
| 25% | 20.0% | $0 |
| 33% | 25.0% | $0 |
| 43% | 30.0% | $0 |
| 50% | 33.3% | $0 |
| 67% | 40.0% | $0 |
| 100% | 50.0% | $0 |
| 150% | 60.0% | $0 |
Markup → Margin Conversion
$0
Your sell price
Adjust the inputs on the left to see your numbers update in real time.
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Markup vs Margin for Plumbing Contractors
Plumbing flat rate books are built on markup percentages. The problem is most plumbers think their markup percentage is their profit margin. It is not. A 55% markup means your margin is only 35.5%.
This calculator shows you both numbers side by side for any job cost. Plug in a service call, a water heater install, or a repipe estimate and see what you are actually keeping after costs.
The Most Common Mistake
Here is how it plays out on a real call. A plumber runs a drain cleaning that costs $120 in labor and materials. He marks it up 50% and charges $180. He thinks he is making 50% profit. His actual margin is 33%. Out of that $60 gross profit, $30 goes to overhead (truck, insurance, office). He made $30 on a job that took 2 hours including drive time. That is $15/hr profit.
Plumbing Example
Water heater install: your cost is $650 (labor, unit, fittings, permit). At 55% markup, you charge $1,007 and keep $357 (35.5% margin). At 55% margin, you would charge $1,444 and keep $794. Per job difference: $437. At 3 water heater installs per week, that is $68,000 per year in revenue difference. The customer sees a $437 price difference. Most will not shop it if your reviews are solid.
What We Recommend
Price plumbing service using margin targets. 45% to 55% margin on service calls, 35% to 45% on larger projects. Build your flat rate book with margin math, not markup math. When you quote $350 for a job, you should know that $157 is profit, not just that you "marked it up 55%."
Frequently Asked Questions
What markup should plumbers charge on parts and labor?
Most profitable plumbing companies target 45% to 55% margin on service calls, which translates to 82% to 122% markup. Parts markup is typically 25% to 50% on top of wholesale cost. For larger projects like repipes or water heater installs, target 35% to 45% margin (54% to 82% markup). Always price using margin targets, then convert to markup.
What is a good profit margin for plumbing companies?
Plumbing companies should target 45% to 55% margins on service calls and 30% to 40% on larger projects. Drain cleaning can hit 60% or higher because material costs are minimal. At 50% margin on a $400 service call, you keep $200 in gross profit. If your margins are below 35%, your flat rate book needs recalculating.
What is the difference between markup and margin for plumbers?
Markup is added to your cost. Margin is a percentage of your selling price. A 55% markup on a $350 service call means you charge $542 and keep $192. Your margin is only 35.4%. The two numbers are never the same, and confusing them leads to underpricing every job.
How do you calculate profit margin on a plumbing job?
Divide your gross profit by the selling price. If a water heater install costs you $650 and you charge $1,100, your profit is $450. Margin = ($450 / $1,100) x 100 = 40.9%. Do not divide by cost ($450 / $650 = 69.2%). That is markup, not margin.
How should plumbers price their flat rate book?
Build your flat rate book using margin targets, not markup. Calculate your fully loaded cost per task (labor, materials, truck time, overhead), then set the price to hit your margin target. For a $200 cost task at 50% margin, your flat rate price should be $400, not $300 (which would be a 50% markup at only 33% margin).
Knowing Your Numbers Is Step One
This calculator shows you one piece. The Growth Report shows you the full picture: where you're leaking revenue, what to fix first, and how contractors like you are growing past the ceiling.