Principle 5 · Spending
Know Your Number
The sum of your basic monthly costs is your most important number. It sets your cushion and your Freedom Day.
Out of every number in your financial life, one matters most: what a basic month costs you. Not an average month, not a treat-yourself month — the floor. Rent, food, transport, insurance, utilities, minimum debt payments. That sum is your number, and almost everything else is measured against it.
A teaching example: rent $1,100, food $400, transport $200, insurance $150, utilities and phone $150. The number is $2,000 a month. Now other questions answer themselves. A three-month safety cushion? $6,000 — not a vague "some savings," a target. How long could you survive a job loss with $8,000 in the bank? Four months. What does financial freedom require? Passive income of $2,000 a month — not a million dollars, just your number, covered.
People who have never added this up tend to guess wrong by a lot, and both directions are expensive: guess low and your cushion is thinner than you think; guess high and freedom looks further away than it really is.
In the simulation, this number is the win condition itself. Freedom Day arrives on the day passive income covers essentials — so the whole game is a conversation with your number.
Where you’ll live this in the game
This is the win formula itself: Freedom Day arrives when passive income covers essentials, and the Freedom bar tracks how far the horizon sits.
Source: Robin & Dominguez — Your Money or Your Life; FIRE movement
Principles stick when you live them.
Play the free demoFreedom Day is an educational simulation. Nothing here is financial advice. It is a simulation for learning. For decisions about your own money, talk to a qualified professional.