Job Costing with Time and Attendance: Knowing Where Labour Went
Published: 9 September 2026
You can pay people correctly and still lose money on a project — if you never allocate labour to the jobs that consumed it.
Job costing links hours from time and attendance to jobs, sites, or cost centres. Estimates meet actuals. Margins stop being a guess after the invoice.
Why T&A is the right source
Job costing built on memory or paper dockets collapses under volume. Clockings — biometric, terminal, or geofenced — give a timestamped trail of who was where. Allocate those hours to the right cost object and finance gets usable labour cost.
What good job costing needs
- Reliable clockings (identity + time)
- Clear job / site / cost centre codes your teams will actually use
- Reporting that compares estimate vs actual without another spreadsheet
Zeroslack’s job costing module sits on top of trusted attendance. Details: payroll exports and job costing.
Who feels the difference
Construction, project services, multi-site retail ops, and any business that quotes labour into a job. Pair job costing with industry context on industries and hardware choices on Zack.