learn stage 3 8 min read

Time Tracking for Agencies: Project Profitability, Client Reporting, and Which Tool to Choose

Last reviewed: 2026-05-23 8 min read

Agency time tracking failures almost always have the same root cause: the tool was rolled out as an accountability measure rather than a billing and profitability tool. Teams that understand they’re tracking time to improve project pricing (which directly affects their salaries and job security) track more consistently than teams that understand they’re being watched.

This guide covers how to frame, set up, and use time tracking in an agency context.

What agency time tracking actually needs to do

Billing accuracy: Capture all billable time so you invoice accurately. Agencies that track carefully typically discover they’re doing 15–25% more work than they’re billing for.

Project profitability analysis: Compare actual hours worked vs quoted hours to know which clients and project types are profitable and which are unprofitable. You cannot improve your pricing without this data.

Client reporting: Show clients where their budget is going, either in detailed time entries or aggregated summaries. Clients who can see the work have fewer invoice disputes.

Utilisation reporting: Understand what percentage of your team’s capacity is billable. This tells you whether you have room to take on new work or whether you’re at capacity.

Estimation calibration: Use historical data to improve future project quotes. If your web projects consistently come in 20% over estimate, your quotes need to be 20% higher.

Structuring your time tracking setup for agency billing

Project hierarchy

Set up your time tracking tool with this structure:

Client → Project → Task type

Example:

Acme Corp → Website Redesign → Design
             Website Redesign → Development
             Website Redesign → Project Management
             Website Redesign → Client Communication
Monthly Retainer → Social Media Management
Monthly Retainer → Analytics Reporting

Don’t create a single project per client. If Acme has three active projects, tracking all time under “Acme Corp” makes it impossible to see which project is over-budget.

Don’t create a new task for every deliverable. Too granular = too much overhead. Aim for 4–6 task types per project type, not 30.

Billable vs non-billable

Mark every project as billable or non-billable before your team starts tracking:

Billable: Client work, including all revisions and client communication Non-billable: Business development, pitch work, internal training, team meetings

The categorisation drives your utilisation reports and tells you your real effective hourly rate.

Which tool for which agency type

Solo freelancer or 2–5 person agency: Toggl Track free tier or Clockify free. Both cover all basic needs at zero cost. Upgrade to Toggl Starter ($9/user/mo) or Harvest ($12/user/mo) when you need billable rate calculations and better reports.

5–20 person agency with invoicing needs: Harvest. Native invoicing from tracked time is the decisive feature. Harvest’s budget alerts and project profitability reports are the strongest in the category at this size.

Agency with timer compliance problems: Timely. If your team has tried Toggl or Clockify and compliance was below 75% after 3 months, Timely’s automatic tracking is the structural fix. Worth the £11/user/mo premium over manual tools.

Agency with employee monitoring requirements: Hubstaff. Screenshot capture and activity monitoring are available if needed for client contracts or remote team accountability. Be explicit with your team about what’s being captured.

Client reporting: what to show and how

Most clients want one of two things:

Summary report: “You billed us £8,500 — what did we get?” A one-page summary showing time by deliverable/phase. Most clients are satisfied with this.

Detailed report: “Show me every time entry.” Usually requested after a disputed invoice. Having detailed, accurate time entries with good descriptions makes this conversation much easier.

Tools for client reports:

Harvest: native “client report” sharing — send a URL rather than a PDF
Toggl Track: export to PDF or CSV; filter by client and date range
Clockify: shared report links available on paid plans

Report quality tips:

Your descriptions must be useful. “Design work” is not. “Homepage wireframe — initial version per brief 12 May” is.
Show time by phase, not by individual. Clients don’t usually need to know that Person A did 3 hours and Person B did 2 — they need to know that 5 hours went to wireframing.
Include non-billable client communication if it’s significant. Clients often don’t realise how much coordination time their projects require.

Project profitability analysis

At project close (or monthly for retainers), compare:

Estimated hours × billing rate = expected project revenue
Actual hours × billing rate = actual billed (or billable) revenue
Actual hours × cost rate = actual project cost (what it cost you to do the work)

Margin = Billed revenue - Project cost

If you’re running at 60% margin on your design projects and 20% on your development projects, you now have pricing data. Either increase development rates, reduce development scope, or improve development efficiency.

This analysis requires both billing rates and cost rates in your time tracking tool. Harvest supports both; Toggl Track supports billing rates but not cost rates natively.

The scope creep identification

Every retainer or fixed-price project should have a budget set in your time tracking tool. When actual hours hit 80% of budget, you get an alert. This is when you have the scope conversation — not when you’ve already done the work.

Harvest’s budget alerts are the strongest implementation of this pattern. Toggl Track Premium also has budget alerts. Clockify Pro has project budgets.