tollijen is an independent publication that explains business profitability in plain terms — margins, pricing, cost control and cash discipline. Everything here is free to read and informational only; we sell nothing.
Profitability isn't one number — it's the sum of several decisions. We focus on the levers that owners can actually pull.
How gross and net margin are actually calculated, and why they tell you different things.
Common pricing models and a simple process for checking whether your current price is doing its job.
Where costs quietly creep up in a growing business, and how to review them without cutting corners.
Why a profitable business can still run out of cash, and the habits that keep the two in sync.
Most "profit playbook" content online exists to sell a course, a template, or a fractional CFO retainer. tollijen was built as the opposite: a free, informational resource that explains how profit actually works, clearly enough that you can review your own numbers with more confidence, whatever stage your business is at.
Reader mail, forums and our own conversations with small business owners tell us where confusion sits.
Public data, accounting standards and practitioner interviews inform every guide we write.
Every guide includes a simple, numeric example so the concept isn't just abstract theory.
Guides are dated and periodically reviewed so the figures and terminology stay accurate.
“tollijen's margin guide finally made me understand why we were growing revenue but not profit. No pitch attached, just a clear explanation.”
— Reader feedback, submitted via our contact form
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