Timesheet Software for Agencies: Track Billable Hours & Client Projects (2026)
How agencies can track billable hours, manage client projects, and improve utilisation rates with the right timesheet software. Updated for 2026.
Why Time Tracking Is Critical for Agencies
For agencies — whether marketing, PR, design, recruitment, consulting, or any other client-service business — time is literally the product being sold. Yet many agencies still rely on a patchwork of spreadsheets, rough estimates, and end-of-week memory to capture how time was actually spent. The result is systematic under-billing, scope creep that goes undetected until it is too late, and finance teams working from inaccurate data.
Accurate time tracking does more than just support invoicing. It reveals which clients, projects, and retainers are actually profitable. It helps you price future work more accurately. And it gives you the data to have difficult conversations with clients about scope when a project runs over.
The Agency Time Tracking Problem
Most agency time tracking problems fall into a handful of recurring patterns:
- Retrospective logging: Staff fill in timesheets on Friday for the whole week from memory, introducing significant inaccuracy.
- No project split: Hours are logged against a client but not broken down by project, campaign, or deliverable — making it impossible to know which work type is profitable.
- Hidden non-billable time: Internal meetings, admin, and business development are not tracked, so utilisation rates are calculated on incomplete data.
- Approval delays: Timesheets sit with managers for days before approval, slowing payroll and invoice generation.
The good news is that a well-configured timesheet app solves all of these at once.
What Agencies Should Look for in Timesheet Software
Project and client tagging
Every hour logged should be attributable to a specific client and project. This is non-negotiable for agencies. When reviewing timesheet software, check that employees can select a client and project from a dropdown at the point of clock-in or timesheet submission — not as an afterthought. This small step transforms your data from a payroll record into a business intelligence tool.
Billable vs non-billable hours
Not all agency time is billable. Internal strategy sessions, pitches, admin, and professional development are all necessary but cannot be charged to clients. Your timesheet system should allow hours to be flagged as billable or non-billable so utilisation rates reflect reality.
Approval workflows
Agency timesheets often need sign-off from both an account manager (who knows the client situation) and a finance manager (who generates invoices). Look for software with multi-level approval workflows and the ability to query individual line items without rejecting an entire timesheet.
Payroll integrations
Agency staff are often on varied contracts — permanent employees, part-time workers, and freelancers sometimes all working on the same client. Your timesheet software needs to export cleanly to your payroll or accounting system. Payroll integrations with Xero, QuickBooks, or CSV export are the minimum requirement.
Mobile access
Agency staff work from client offices, coffee shops, coworking spaces, and home. A mobile app is essential so time can be logged the moment work is done, not reconstructed at the end of the week.
Understanding Utilisation Rates
Utilisation rate is the percentage of a staff member's available time that is spent on billable work. A copywriter who works 40 hours a week but only logs 28 billable hours has a 70% utilisation rate. The industry benchmark varies — creative agencies often target 65–75% to allow time for new business and internal work — but the important thing is that you can measure it accurately.
Without detailed timesheet data, utilisation is guesswork. With it, you can identify underutilised team members who could take on more client work, overloaded staff who are at risk of burnout, and projects that are consuming far more time than scoped.
Protecting Against Scope Creep
Scope creep — additional work requested by clients beyond the original brief — is one of the most significant profitability threats facing agencies. It typically goes undetected because there is no clear record of time spent at the project level.
When every hour is logged against a specific deliverable, scope creep becomes visible in real time. Account managers can see when a project is approaching its budgeted hours and have an evidence-based conversation with the client about a change order before the work is done for free. This is one of the highest-return applications of timesheet software for agencies.
Overtime and Working Time Compliance
Agency culture sometimes normalises long hours, but employers remain legally obligated to comply with the Working Time Regulations 1998. Employees cannot average more than 48 hours per week over a 17-week reference period without signing a valid opt-out agreement. Tracking overtime is not just a payroll matter — it is a compliance and duty-of-care issue.
Our guide to calculating overtime in the UK explains your obligations in detail. Good timesheet software will flag when employees are approaching the 48-hour threshold so you can act before there is a problem.
Making Timesheet Submission a Habit
The biggest timesheet challenge in agencies is not the software — it is getting creative staff to submit on time. Some practical approaches that work well:
- Set a firm weekly deadline (e.g. Friday at 5pm) and communicate it clearly
- Use automatic reminders — good timesheet software sends these without manager intervention
- Make approval fast so staff see their submitted timesheets move through the system quickly
- Tie timesheet submission to payroll processing — if timesheets are not submitted, pay is delayed
- Keep the logging process simple: one-tap clock-in with client and project selection
For a deeper look at this problem, see our guide to time tracking for professional services businesses.
Key Takeaways for Agencies
- Log time by client and project, not just by employee — the detail is what makes the data useful.
- Separate billable and non-billable hours to get an accurate utilisation rate.
- Use timesheet data proactively to identify scope creep before it erodes margins.
- Ensure your timesheet software integrates with your accounting or payroll system.
- Set up automatic reminders to eliminate the weekly chase.
TimeTallyTrack Billable Hours Automatically
Clock-in by project, approve timesheets in seconds, and export payroll-ready data to Xero or QuickBooks. Built for agencies that bill by the hour.
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