A proof of performance (often also called a timesheet or activity report) is the central document in agencies and project-driven teams that shows clients which work was performed during a specific period. It lists in detail who worked on which task, when, and for how long. In short: the proof of performance is the reliable basis for your billing and makes your services transparent.
Does this sound familiar? At the end of the month, hours are wildly cobbled together by your team so that the invoice can finally be sent to the client. Without a clean proof of performance, not only do tedious discussions about budgets arise, but valuable billable hours (billability) are also lost. Professional documentation secures your margin and builds immediate trust with the client.
Why agencies need precise proof of performance
Anyone billing based on effort (Time & Material) or using flexible retainers cannot avoid a clean record of working hours. It offers you and your clients tangible advantages:
- Maximum transparency for clients: Discussions like "Why did the design take so long?" become a thing of the past. The client sees in black and white how much effort went into which task.
- Protection against unpaid scope creep: When clients constantly have small change requests, the proof of performance makes this extra effort visible and billable.
- Smooth invoicing: Your accounts department doesn't have to guess figures or chase the team. The data for the invoice is directly validated and available at the end of the month.
- Better resource planning: Real-time data from activity reports helps your team to calculate future projects and milestones more realistically.
Create proof of performance without Excel chaos
In the past, creating proof of performance meant laboriously typing up notes from pads into Excel spreadsheets. This frustrates the team and is extremely prone to errors. Modern project management tools with fully integrated time tracking make this process almost invisible:
- Record times directly while working: With intuitive start-stop timers, hours simply run alongside the task being processed.
- Convert appointments smartly: Calendar events can now be translated into recorded times with just one click.
- Automatic evaluations: At the end of the billing cycle, you simply filter by the respective client or project. You can generate the finished proof of performance with one click as a PDF or Excel export.
Is there a legal requirement for proof of performance?
Generally, there is no blanket legal obligation to issue a separate "proof of performance" to clients. However, in the service and agency industry, it is almost always agreed upon in the project contract. As soon as you bill for hourly effort, proof is mandatory so that the invoice is auditable. Furthermore, the obligation for systematic internal working time recording for all employees now applies anyway.
Which details must be included in a proof of performance?
To ensure the client approves your invoice quickly, the report should be absolutely clear. Important mandatory details include: date of service provision, exact duration (in hours or minutes), name of the person performing the work, assignment to a specific project or task, and a clear description of the activity.
How often should the team send the activity report to the client?
This depends on your individual billing cycles. The standard is a monthly proof of performance sent as an attachment along with the invoice. For large budgets or extremely agile sprints, it is highly recommended to share weekly interim reports. This allows all stakeholders to keep a continuous eye on the budget burn and prevents surprises.
Conclusion: Less admin, more billable hours
A structured proof of performance not only secures agency revenue but also brings peace to the client relationship. Save your team the annoying task of collecting hours at the end of the month and build smart workflows. If time tracking is seamlessly anchored in the awork tool of your choice, the proof of performance generates itself – and the focus returns to the actual work.
