Income describes what passes through your hands. Net worth describes what stopped. Only one of them can be faked with a good salary.
Everything you own, minus everything you owe
That is the whole formula, and its power is not in the arithmetic. It is in what it refuses to be impressed by.
A large salary spent entirely produces a net worth of zero. A modest salary saved consistently produces a real one. Income is a rate; net worth is the score — and the two correlate far less than anyone expects.
It is not what you earn. It is what you kept.
What goes in each column
Assets: cash and savings, investments, retirement accounts, the market value of your home, the resale value of your vehicles. Include retirement money even though you cannot reach it — it is yours.
Liabilities: mortgage, student loans, car loans, credit card balances, anything else you owe.
Leave out anything you would not actually sell or could not honestly price: furniture, clothes, the value of your education. Padding the assets column only fools the person doing the padding.
Value things the way a buyer would
Use a realistic sale price for your home, not the best comparable on your street, and remember that selling costs several percent in fees and taxes. Use resale value for a car, not what you paid — a three-year-old vehicle is worth considerably less than it feels.
Conservative valuations make the number less flattering and much more useful, because it is the number you would actually have.
The figure behind the figure: liquid net worth
Net worth includes a house you live in and retirement money you cannot touch. Neither pays a bill next Tuesday.
Liquid net worth — cash and investments minus short-term debt — describes your real flexibility. People who look comfortably positive on paper are routinely one boiler away from a credit card, because everything they own is locked inside a single illiquid asset. If your liquid figure is thin, that is the problem to solve first, and an emergency fund is how.
A recent graduate with student debt and no assets is exactly where they should be. Someone who has just bought a home with a small deposit can be close to zero. What matters is the direction, which is why the real value of this exercise only appears the second time you do it.
Two levers, unequal returns
You can raise assets or lower debts. A unit of currency moves the number identically either way — but the returns are not identical. Clearing a card at 22% is a guaranteed 22% improvement. Investing might average 7% and might not. When the debt is expensive, paying it off wins outright and it is not close.
The third lever is time, and it dwarfs both. Compounding does most of the work in the second half of a long horizon, which is precisely why the contributions in the first half matter so much.
Measure it twice a year, not twice a month
Net worth moves slowly by design. Checking it weekly means watching market noise and mistaking it for information.
Pick a fixed date — a birthday, the first of January — use the same method every time, and write the number down. In five years that short list will tell you more about your finances than any single month of budgeting ever could.