// Blog
The Rytmely blog
Practical guides on time tracking, profitability, billing and AI agents.
How to Calculate and Improve Client Profitability
Not every client is equal. Some fund your growth, others quietly eat into your margins. Here is a clear method to measure the profitability of each client and act on it.
How to bill for work done by an AI agent
Your AI agents (Claude, Cursor, Codex) now produce part of your deliverables. This practical guide covers the honest questions that raises: should you bill for that time, how do you measure it, and how do you stay transparent with the client.
How to bill for time spent (time and materials): a practical guide
Agencies, freelancers and IT services firms: understand time and materials billing, set the right hourly rate, and turn every hour worked into a justified invoice, with no unlogged time lost.
Consultant billable rate and utilization: understanding and improving them
These two metrics drive the profitability of any consulting firm, professional services company or agency. Here is how to define them, calculate them and act on them, with simple examples.
Time and materials vs fixed price: which billing model should you choose?
Billing on time and materials or at a fixed price: two opposite logics, each with its strengths and traps. This practical guide helps agencies, freelancers and IT services firms decide based on the project, not on habit.
From theory to practice
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