A time log is a chronological record of when work happened and, when needed, what project, task, client, or activity the time relates to. Time logs can support payroll, client billing, project costing, capacity planning, compliance, and process improvement.
Include only fields that serve the record’s purpose. Payroll needs clock times, breaks, and approvals; costing needs a project or code; a process study may need a limited activity category. None of those purposes requires a minute-by-minute narrative of an employee’s day.
Time log vs. timesheet vs. time card
A time log is the chronological record: date, start and end or duration, and an activity or code. A timesheet summarizes a period for payroll, billing, or costing and usually includes certification and approval. A time card records clock events, breaks, and attendance exceptions. A work log is a narrative of tasks, results, and blockers. Use the record that matches the decision instead of forcing one form to do every job.
Organizations often use the terms interchangeably. The important point is to define the business purpose and required fields.
What a time log should include
Use only the fields that support a real need:
- employee or contractor name and ID;
- date and applicable time zone;
- start and end time or duration;
- unpaid break, where relevant;
- project, client, task, job, or cost code;
- regular, overtime, leave, or other time category;
- concise note for exceptions or unusual work;
- employee certification;
- supervisor approval or rejection;
- correction history where records affect pay, billing, or cost.
For nonexempt employees, payroll timekeeping must capture all hours worked under the applicable federal, state, and local rules. Project and productivity categories should never be used to erase compensable time.
Copy-ready weekly time log template
Use one entry for each day or work interval with these fields: date, start, end, unpaid break, project or code, short work summary, regular hours, and overtime hours. Add daily totals and a weekly total. If payroll does not need the work summary, remove it rather than asking employees to write unnecessary narratives.
Employee certification: I confirm that this record is complete and accurately reflects the time worked and applicable leave for the period shown.
Employee: ____________________ Date: ____________________
Reviewer: ____________________ Date: ____________________
Adapt the template to the laws, contracts, and policies that apply. A spreadsheet is convenient for a small, low-risk process, but it becomes fragile when multiple people edit formulas, approvals are informal, or changes overwrite history.
Time log examples by use case
Payroll and attendance
Capture start, end, unpaid breaks, leave, overtime category, and approval. Define how missed punches, schedule exceptions, and corrections are handled.
Client billing
Add client, engagement, project, billable category, and a concise description. Keep billing rules separate from payroll rules: time may be compensable even when it is not billable to the client.
Project costing
Use controlled project or cost codes. Close codes when work ends and preserve corrections. Reconcile approved time with the job-cost or accounting system.
Professional-services capacity
Record client, internal, business development, leave, and training time. Accurate time tracking matters because it lets you analyze billable and non-billable hours without treating every non-billable hour as waste.
Personal time audit
Use broad categories for one or two representative weeks: focused work, meetings, administration, support, learning, and unplanned requests. The purpose is to improve the system, not to produce a permanent surveillance record.
How to create a reliable time-log process
Define the purpose
State whether the record supports pay, billing, costing, scheduling, compliance, or analysis. Each purpose has different fields, review requirements, and risks.
Choose the entry method
Options include start/stop timers, clock events, duration entry, automatic collection with employee review, or a hybrid. The method should fit the work without encouraging reconstruction or false precision.
Create a controlled code list
Use recognizable codes with owners, effective dates, and instructions. Employees need a way to request a missing code without charging time to the nearest available option.
Set entry and approval deadlines
Daily entry is more accurate than end-of-week reconstruction. Supervisors need enough time to review exceptions rather than approving everything in a rush.
Preserve corrections
If the log supports payroll, client billing, contracts, or cost allocation, keep the original value, corrected value, user, timestamp, reason, and approval.
Reconcile downstream records
Check that approved time moves correctly into payroll, billing, project, and accounting systems. A complete time log can still create the wrong result if a code mapping is broken.
Common time-log mistakes
- Requiring detail no decision maker uses.
- Asking employees to record time twice in disconnected systems.
- Treating project allocation as a substitute for all hours worked.
- Allowing formulas or prior periods to be overwritten.
- Using vague codes such as “admin” for a large share of time.
- Approving without reviewing missing days, unusual hours, or corrections.
- Converting every minute into a judgment about productivity.
When a spreadsheet is no longer enough
Move to a dedicated system when the organization needs multi-level approvals, audit trails, controlled charge codes, payroll or billing integrations, mobile or offline entry, role-based access, or reliable reporting across many employees.
Software does not remove the need for policy. Define who records, reviews, corrects, exports, and retains the data. The signs a time-tracking system needs an upgrade can help distinguish a process problem from a tool limitation.
When automatic logs beat manual entry
For computer-based teams, KeepActive adds work-time and application-use context from approved company devices. That may help a computer-based team validate broad work patterns or investigate gaps in manually reported time. It should not silently replace employee time records required for payroll, billing, or contract accounting. Compare sources, resolve exceptions with the employee, and follow a transparent policy.
Design for ugly timekeeping edge cases
The reliable system is the one that handles the ugly cases: a shift crossing midnight, daylight-saving time, a lost connection, a late project-code change, a rejected entry, or work performed after a supervisor has approved the week. Test those scenarios before rollout and keep the original entry, correction, reason, and approver.
Never silently overwrite the raw interval to make payroll easier. Store the event time with its timezone, calculate the payable result under the applicable rule, and expose exceptions for review. The audit trail should explain how the final number was produced without asking an employee to reconstruct the week from memory.
Capture only the detail the decision needs
Design the log backward from the decision: payroll, billing, costing, capacity, or compliance. Anything that does not help that decision adds effort and data risk without improving the record.
