How to write MSP time entry notes clients will pay for

A billable note answers four questions: what the problem was, what you did about it, what changed or was verified, and why it mattered to the client. Most disputed invoice lines are missing at least two of them.

This guide covers what a defensible entry contains, worked examples for remote support, onsite work, projects and security incidents, and the phrases that most often trigger a billing question.

• State the problem in the client’s terms, not only the symptom
• Record the specific actions taken, not a category of work
• Say what changed, and how you know it changed
• Note who you confirmed it with, only when you actually confirmed it