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Operations5 min readFebruary 5, 2026
GPS Time Tracking: Trust but Verify
By ZonaPlan Team
Labor is typically the largest cost on a construction project. Yet many contractors still rely on paper timesheets or honor-system clock-ins, leading to inaccurate records and profit leaks.
The Problem with Paper Timesheets
- **Buddy punching**: One crew member clocks in for another
- **Time inflation**: Rounding up arrival times and rounding down departures
- **Late submissions**: Timesheets submitted days later from memory
- **Payroll headaches**: Manual data entry into payroll systems
GPS-Verified Time Tracking
Modern time tracking captures location data when crew members clock in and out:
- **GPS coordinates**: Verify the crew member is actually on-site
- **Selfie verification**: Optional photo capture prevents buddy punching
- **Automatic timestamps**: No rounding, no guessing, no memory lapses
- **Real-time visibility**: See who's clocked in across all projects right now
Geofence Notifications
ZonaPlan goes a step further with geofence monitoring. When a crew member's phone enters a project's GPS radius:
- They get a notification reminding them to clock in
- When they leave, they get a reminder to clock out
- No more forgotten clock-ins or phantom hours
Organization-Level Settings
Different organizations have different needs. ZonaPlan lets you configure:
- Whether GPS is required for clock-in
- Whether selfie verification is required
- Project-level overrides for specific job sites
- Minimum distance thresholds for geofence alerts
The Bottom Line
Accurate time tracking directly impacts profitability. Contractors who switch from paper timesheets to GPS-verified tracking typically see 5-10% labor cost savings from eliminated time inflation alone.