In the mechanical contracting world, calculating your material cost is generally straightforward. The real challenge—and the ultimate secret to true profitability—lies in estimating labor correctly.
If an estimator fails to provide accurate labor estimates, a seemingly lucrative bid can quickly turn into a financial disaster. Whether you are pricing HVAC, plumbing, or even handling electrical estimating, the impact of poorly calculated labor units is severe. This guide reveals the secret to mastering the process of calculating labor, ensuring your next quote is flawlessly accurate.
1. Establishing the True Hourly Labor Rate
The first step in calculating labor is determining your true hourly labor rate. Many contractors make the critical error of only looking at base wage rates.
To calculate your true rate accurately, it’s important to factor in all the indirect costs and expenses associated with keeping your crew in the field. You must include overhead costs, vehicle maintenance, tool depreciation, insurance, and accounting fees. This fully burdened hourly rate ensures you aren’t losing money before the installation even begins. Once you have this baseline, calculating total labour costs becomes much more reliable as market costs vary.
2. Estimating the Number of Labor Hours Required
Next, you must focus on estimating the number of labor hours needed. The number of labor hours required to get the job done is often calculated by dividing the total estimated work by the expected output of a skilled worker.
To ensure maximum accuracy, you should conduct a detailed breakdown of the project, analyzing the cost per task or per unit. How long does it actually take to hang ten feet of commercial ductwork?
- Use Time Studies: Time studies are highly effective here. Observe your crew in the field and analyze the actual time spent on specific tasks.
- Track Historical Data: This real-world data helps you determine the exact time required and the total number of labor hours needed for future projects.
3. Adjusting for Factors That Affect Productivity
You cannot just apply a standard calculation blindly. Several factors influence and impact productivity on every site. Every time you create a cost estimate, you must evaluate the project environment and make an adjustment to adjust labor units based on reality.
Factors that affect the number of labor units include:
- Complexity: The complexity of the engineering specification and the materials involved.
- Site Accessibility: The physical accessibility of the site and any restrictive working conditions.
- Scheduling: Does the project schedule require significant overtime to hit deadlines?
- Logistics: The availability of materials and whether the team has to wait on other trades, causing a delay.
Never underestimate how much these variables contribute to the final labor cost. The actual labor used and the theoretical labor required are rarely identical without careful foresight.
4. The Power of Modern Estimating Software
Relying on manual takeoffs and spreadsheets is a primary reason contractors miscalculate labor. To calculate the total labor seamlessly, modern contractors use advanced estimating software.
Good software standardizes your costing metrics. Estimating software allows you to globally update labor rates across your database instantly. A digital platform allows you to conduct a thorough review of the number of hours spent installing systems, pulling data from past jobs to ensure you provide accurate estimates without the guesswork.
Need Help Refining Your Labor Units?
Protecting your margins requires extreme precision. Mastering how you assess wages, apply historical data, and account for job site complexity will protect your bottom line.
If you are struggling to lock in your labor units or simply don’t have the time to calculate them perfectly, we can help. Would you like to schedule a quick call with Chase Estimating to see how our “done-for-you” takeoff services guarantee accurate labor costs on every bid?
