How to Track Employee Hours on Construction Job Sites
Accurate time tracking is the difference between knowing your real labor costs and guessing. For construction companies, it's especially challenging because your team works at different sites every day.
Here's how to set up a system that actually works.
Why Paper Timesheets Fail
If you're still using paper timesheets or the honor system, you're likely losing money:
- **Buddy punching** — one guy clocks in for another who's running late
- **Rounded hours** — "I got here around 7" usually means 7:15
- **No job allocation** — you know they worked 8 hours, but across which projects?
- **Lost sheets** — Friday comes and nobody remembers Monday's hours
- **No overtime visibility** — you don't realize someone hit 40 hours until payroll
Studies show that paper timesheets have an average error rate of 1-2 hours per employee per week. At $25/hour, that's $50-100 per worker per week in untracked costs.
GPS Time Clocks: The Modern Solution
A GPS time clock captures the employee's location when they punch in and out. This gives you:
1. **Proof they were on-site** — GPS coordinates match the job address
2. **Automatic job allocation** — system knows which project they worked on based on location
3. **Accurate timestamps** — no rounding, no guessing
4. **Digital record** — accessible from anywhere, never lost
Geofencing: The Next Level
Geofencing creates a virtual boundary around each job site. When an employee punches in:
- **Inside the geofence** → Normal clock-in, auto-assigned to that project
- **Outside the geofence** → Flagged for review, requires explanation
This eliminates the "I was driving to the site" padding and ensures hours are only counted when workers are actually on location.
Setting Up Geofences
For each active project:
1. Set the job site address
2. Define a radius (typically 200-500 feet to account for GPS drift)
3. The system automatically validates punches against this boundary
What to Track Per Punch
A good time tracking system captures:
| Data Point | Why It Matters |
|-----------|----------------|
| Clock-in time | Accurate start time |
| Clock-out time | Accurate end time |
| GPS coordinates | Location verification |
| Project assignment | Job costing allocation |
| Break time | Compliance + accurate hours |
| Notes | Context for unusual entries |
| Photo (optional) | Visual proof of presence |
Handling Common Scenarios
### Employee Works Multiple Sites in One Day
They clock out of Site A and clock into Site B. Each segment is automatically allocated to the correct project.
### Employee Forgets to Clock Out
Set up automatic alerts for entries open longer than 12 hours. Admin can manually close the entry and set the correct time.
### No Cell Service on Remote Sites
Allow "offline" punches that sync when connectivity returns. GPS coordinates are still captured locally.
### Overtime Calculation
The system should automatically flag hours over 40/week per employee and calculate the 1.5x rate for payroll.
From Hours to Job Costing
The real power of digital time tracking is connecting hours to dollars:
1. **Set hourly rates per employee** (including burden: FICA, workers' comp, insurance)
2. **Hours x burdened rate = true labor cost per project**
3. **Compare labor cost to budget** in real-time
4. **Identify unprofitable jobs** before they're finished
Example:
- Employee works 24 hours on a bathroom remodel
- Burdened rate: $38/hour (includes $25 base + $13 burden)
- True labor cost: $912
- You quoted $1,400 for labor on that phase
- Margin: $488 (35%)
Without tracking, you'd never know if that job was profitable until tax time.
Payroll Integration
At the end of each week:
1. Review all time entries (approve, edit flagged ones)
2. Run payroll calculation (regular hours + overtime)
3. System shows allocation: "John worked 20hrs on Project A, 18hrs on Project B, 4hrs overtime"
4. Export to your payroll provider or calculate in-platform
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