How to Track Labor Costs for Plumbing Business
Table of Contents
- Why Tracking Labor Costs Matters for Plumbing Contractors
- Understanding Labor Burden and Overhead in Plumbing
- Step-by-Step Process to Track Labor Costs
- Creating a Plumbing Job Costing Template
- Calculating Plumbing Labor Burden Accurately
- Best Software for Plumbing Job Tracking
- Using Your Plumbing Profit and Loss Statement
- Common Mistakes to Avoid When Tracking Labor
- Frequently Asked Questions
Last Updated: October 2, 2026
Why Tracking Labor Costs Matters for Plumbing Contractors
Labor is your biggest expense. For most plumbing businesses, it's 40-60% of total project costs. Yet many contractors still guess at profitability instead of learning how to track labor costs for plumbing business.
Without accurate labor tracking, you can't answer critical questions: What's your actual profit on a service call? Which crew members are most efficient? Are you pricing jobs high enough? These directly impact whether your business survives.
Tracking labor costs for plumbing business gives you real numbers. You see exactly where money goes. You spot inefficiencies before they drain your margin. You price future jobs based on actual data, not hope.
Contractors who start tracking labor properly find pricing gaps, identify profitable jobs, and make better crew assignments, transforming busy operations into profitable ones.
The alternative is flying blind. You finish a job, invoice the customer, and weeks later wonder why you barely broke even. That's no way to run a business.
Understanding Labor Burden and Overhead in Plumbing
Labor burden is the total cost of employing someone, not just their hourly wage. It includes taxes, insurance, benefits, and equipment. Your actual labor cost is much higher than what you pay per hour.
Most contractors only count wages. A $30/hour plumber actually costs 30-50% more when you add taxes, insurance, vehicle costs, tools, and training.
Burden includes payroll taxes, workers' compensation, health insurance, vehicle and equipment costs, tools, uniforms, and training.
Incorrect burden calculations lead to underpricing and hidden losses.
Overhead (rent, office staff, utilities, marketing) differs from labor burden. Burden is per-employee cost; overhead is business-wide. Allocate both across billable hours to calculate true profitability.
Step-by-Step Process to Track Labor Costs
Learning how to track labor costs for plumbing business requires a simple, usable process, not expensive software.
Step 1: Set Up Time Tracking in the Field
Record time at the job site, not from memory. Memory is unreliable.
Use one of these methods:
- Mobile app: Crew members clock in and out on their phone, tagged to a specific job
- Paper timesheet: A simple form listing job codes, start time, end time, and notes
- Job ticket system: A form that travels with the job, signed off when complete with hours recorded
Capture time when work happens: job code, start/end time, tasks, delays. Keep it simple enough that crews will use it after a long day.
Step 2: Establish Your Hourly Wage and Burden Rate
Calculate true labor cost by adding burden to gross wage. Example: $30 wage + $12.60 burden = $42.60/hour true cost. Calculate separately for each employee, as senior plumbers with full benefits cost more than apprentices.
Step 3: Allocate Labor to Job Codes and Projects
Link hours to specific jobs using codes (service calls, residential repairs, commercial projects, emergency calls, maintenance contracts). Weekly review shows which job types generate profit and which drain it.
Step 4: Review and Reconcile Weekly
Review weekly: total hours vs. billable hours, discrepancies, actual vs. estimated hours, and productivity trends. Ask why jobs exceeded estimates. This 30-minute review catches errors early.
Creating a Plumbing Job Costing Template
A job costing template tracks labor, materials, and overhead per project. A simple spreadsheet works fine to start.
Here's what to track:
| Field | Purpose |
|---|---|
| Job Name/Code | Identify the project |
| Customer | Track by customer for repeat work |
| Start Date | Timeline reference |
| Estimated Hours | Compare to actual |
| Actual Hours | Labor tracking |
| Labor Cost | Actual hours × burden rate |
| Material Cost | Parts and supplies |
| Overhead Allocation | Percentage of office costs |
| Total Cost | Labor + materials + overhead |
| Revenue | What you charged customer |
| Profit | Revenue minus total cost |
| Profit Margin | Profit divided by revenue |
Update weekly to catch overruns early. Compare estimated vs. actual hours to improve future estimates and pricing.
Calculating Plumbing Labor Burden Accurately
Most contractors miscalculate labor burden by forgetting or misallocating costs. List every employment-related cost:
Mandatory: payroll taxes (7.65% FICA + state unemployment), FUTA (0.6%), state unemployment (2-5%), workers' comp (10-20%). Optional: health insurance, retirement, PTO, tools, vehicle costs, uniforms, training.
Add these up and divide by total annual payroll hours. That's your burden rate.
Example: $40,000 salary + $18,000 burden = $58,000 total cost. At 2,000 hours/year, true cost is $29/hour. Many contractors only count the $20 wage and underprice at $35/hour billing, losing $14/hour.
Best Software for Plumbing Job Tracking
Start simple and add features as needed. Spreadsheets (Google Sheets, Excel) work for small teams but are hard to scale.
Field service software offers mobile time tracking, job costing, accounting integration, and real-time reporting. Choose based on crew size, complexity, and budget.
QuickBooks integrates labor tracking with financial reporting, but it's built for accountants, not field crews, and may feel clunky in the field.
Integration with Checkpoint Bookkeeping: When you use Checkpoint Bookkeeping for your monthly bookkeeping, your labor tracking feeds directly into clean financial reports. Your dedicated bookkeeper reconciles your time entries with payroll and invoices. You get accurate profit-and-loss statements without doing the reconciliation yourself. Books close within 10 business days, so you always know where you stand.
The key is choosing something your crew will actually use. If it's too complicated, they'll stop tracking time. A simple system used consistently beats a perfect system gathering dust.
Using Your Plumbing Profit and Loss Statement
Your P&L statement shows revenue minus expenses to calculate profit. For plumbing businesses, labor costs dominate the expense side.
A typical P&L looks like this:
- Revenue: $150,000
- Less: Labor costs: $75,000
- Less: Material costs: $25,000
- Less: Overhead: $30,000
- Profit: $20,000
That's 13% profit margin. Is that good? It depends on your industry and goals. Many plumbing businesses aim for 15-20% net profit.
The value of tracking labor separately is that you can see trends:
- Is labor as a percentage of revenue getting worse? That signals pricing problems or efficiency issues.
- Are certain job types more labor-intensive? That affects how you estimate and price future work.
- Is one crew more efficient than another? That affects crew assignments.
Review your P&L monthly. Don't wait for tax season. Monthly review lets you make adjustments before a bad quarter becomes a bad year.
A common mistake: confusing gross profit with net profit. Gross profit is revenue minus direct costs (labor and materials). Net profit is gross profit minus overhead. You need both numbers. Gross profit tells you if individual jobs are priced right. Net profit tells you if the overall business is viable.
Common Mistakes to Avoid When Tracking Labor
Most plumbing contractors make the same mistakes when they first start tracking labor. Knowing these helps you avoid them.
Mistake 1: Not tracking time in the field
You wait until Friday to estimate hours from memory. By then, you've forgotten details. You guess. Your data is worthless.
Fix: Require crews to record time at the job site. Make it part of the job completion process. Time recorded = job closed.
Mistake 2: Forgetting to include burden in labor costs
You see $30/hour wage and think that's your cost. You miss the 50% burden on top. You underprice jobs.
Fix: Calculate total burden rate once. Use it consistently. Update it annually when insurance rates or benefits change.
Mistake 3: Mixing personal and business labor
You work in the field some days and office other days. You don't track your own time. You can't calculate accurate labor costs because the owner's time is invisible.
Fix: Track your time like any other employee. Include yourself in labor cost calculations. This is especially important for tax purposes and for understanding true profitability.
Mistake 4: Not allocating overhead to jobs
You know labor and material costs per job. But you ignore office overhead. You think jobs are profitable when they're not, because they don't cover their share of rent and admin.
Fix: Calculate total annual overhead. Divide by annual billable hours. Add that per-hour overhead allocation to every job cost.
Mistake 5: Ignoring time tracking data
You collect hours but never review them. You don't compare estimated vs. actual. You don't adjust pricing based on what you learn.
Fix: Review labor data weekly. Ask why jobs took longer than estimated.
Mistake 6: Not reconciling time entries with payroll
Mistake 7: Using outdated estimates
Frequently Asked Questions
What is the best way to track labor hours for plumbing technicians?
Use a combination of time tracking at the job site and a centralized system to record hours. Technicians should log start and end times for each job, either on paper, mobile app, or dispatch software. Assign each hour to a specific job code so you can allocate labor costs accurately to individual projects. Review and reconcile these records weekly to catch errors before they compound into larger accounting problems.
How do you calculate the true cost of labor for a plumbing job?
Multiply the technician's hourly wage by hours worked, then add labor burden costs (payroll taxes, workers' compensation, benefits, equipment, and overhead allocation). This total is your true labor cost. For example, if a technician earns $25/hour and works 8 hours with a 35% burden rate, the job's labor cost is (25 × 8) + (25 × 8 × 0.35) = $270. Track this on every job to calculate accurate profit margins and set competitive pricing.
Should I include payroll taxes and benefits in my labor cost tracking?
Yes. Payroll taxes, workers' compensation insurance, health benefits, and vehicle expenses are all real costs tied to labor. If you exclude them, your profit margins will appear higher than they actually are, leading to underpricing and cash flow problems. Include these costs in your labor burden calculation so your job costing and P&L statement reflect the true cost of delivering each service.
How often should I review labor costs to maintain profitability?
Review labor costs weekly at minimum, and by job monthly. Weekly reviews catch time-tracking errors and dispatch inefficiencies before they affect project profitability. Monthly job reviews show which types of work are profitable and which are eating into margins. This regular cadence helps you adjust pricing, improve crew efficiency, and identify training needs before profit margins shrink.