Profit First is a behavioral system designed to enforce profitability by treating profit as a mandatory expense, not an afterthought. Instead of the traditional formula of Sales - Expenses = Profit, it flips the script to Sales - Profit = Expenses. This simple change forces you to run your business on the money that's left over.
Cyndi Thomason, on Firing The Man, explains it's like a modern version of your grandmother's envelope system. You create separate bank accounts for different purposes, giving every dollar a job when it comes in. For ecommerce, this means having dedicated accounts for Profit, Owner's Pay, Taxes, Operating Expenses, and, crucially, Inventory. As Karl O'Brien notes on Ecommerce Coffee Break, this prevents the end-of-the-month shock when you realize your revenue didn't translate into actual profit. Many people think the model doesn't fit ecommerce because of inventory complexity, but Cyndi developed workarounds specifically for this, which she details in her book and podcast appearances. The core idea is to combat Parkinson's Law, where expenses expand to consume all available resources. By taking profit first, you create a necessary constraint.
Your first step is to open just one new savings account at a different bank from your primary one. Call it "Profit." Then, set up a recurring transfer to move 1% of your deposits into this account. The amount is less important than building the habit.
