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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.