Billable work does not begin when an invoice is written. It happens in many individual activities: a client meeting, analysis, concept work, alignment, or delivery of a specific step. If a month has to be reconstructed only at the end, details are often missing exactly when they are needed for a traceable invoice.
The question was therefore not how to capture as much work as possible automatically. What mattered was being able to assign individual activities to the right project and contract while they were still fresh in mind.
An activity gets a clear connection
For a billable activity, the project or contract is selected. The entry also records the date, a start and end time, and a short comment. At first, nothing more is needed. It records what was done, when it happened, and which agreed context the work belongs to.
This connection matters because working time alone is not yet a basis for billing. Only the link to a contract or project explains why the activity occurred and where it belongs later.
Record simply, do not guess automatically
The tool should not guess what someone worked on or derive billable time automatically from calendars or other data sources. That convenience can quickly create incorrect assignments. Especially when people switch between projects, the person doing the work knows best which context is right.
The flow therefore remains deliberately simple: choose a project or contract, enter the period, and briefly describe the activity. The comment supplies the human context a later invoice needs, without requiring a report.
A sound basis for invoicing
Entries do not immediately become an invoice. They first create a reliable basis. Later, it is possible to see which work belongs to a contract, how much time was involved, and which activities still need review. That makes invoicing easier without deciding it in advance.
The system does not automatically decide what will be billed. People can review the recorded activities and only then prepare an invoice.
Documentation that does not interrupt work
Time recording helps only when it does not become the main task itself. The point is a few details that can be added quickly while work is happening. The actual service remains central; documentation simply ensures it does not become invisible later.