Income tells you how much money moves through your hands. Net worth tells you how much you’ve managed to keep. Two people earning the same salary can have wildly different net worths — one building wealth, the other running in place — and only the balance sheet reveals which is which.
The formula is refreshingly blunt: net worth = what you own minus what you owe. Assets on one side, liabilities on the other, and the difference is your number. It can be positive, negative, or zero, and following it over time is the clearest single gauge of financial progress there is.
What counts as an asset
An asset is anything you own that has real, sellable value. The usual members:
- Cash and equivalents — checking, savings, money-market balances.
- Investments — brokerage accounts, retirement plans, stocks, bonds, and index funds at their current market value.
- Property— your home, a car, or other valuables, priced at what they’d actually fetch today, not what you paid.
Be conservative. A car is worth its resale value, not the sticker price from three years ago. Leave out things you’d never sell and can’t easily value, like a well-loved couch — they add noise, not signal.
What counts as a liability
A liability is any money you owe. Total the outstanding balances:
- Mortgage — the remaining balance on your home loan.
- Loans — car loans, student loans, personal loans.
- Revolving debt — credit-card balances and lines of credit.
Note the asymmetry: your house appears on the asset side at its full market value, while the mortgage appears separately as a liability. The equity you actually hold is the gap between them.
A worked example
Suppose you sit down and add everything up.
- Assets: $8,000 cash + $45,000 in retirement accounts + $18,000 car + $300,000 home = $371,000.
- Liabilities: $220,000 mortgage + $12,000 car loan + $6,000 student loan + $2,000 credit card = $240,000.
- Net worth: $371,000 − $240,000 = $131,000.
That $131,000 is the honest snapshot. If next year the mortgage falls to $210,000 and investments climb to $55,000 while everything else holds, net worth rises to roughly $151,000 — and that $20,000 jump is the progress your paycheck alone would never show.
Why it beats income as a scoreboard
You can’t out-earn a spending problem. A high income with high debt can produce a lower net worth than a modest income paired with patience.
Income is a flow; net worth is the accumulated result of every decision you’ve made with that flow. It captures saving, investing, debt payoff, and market growth all in one figure — which is exactly why it, and not salary, is the number worth watching.
How to grow the number
- Shrink liabilities. Every extra dollar toward principal lifts net worth dollar-for-dollar and cuts future interest.
- Grow assets. Automate investing so contributions and compounding do the heavy lifting over years.
- Measure quarterly. Recompute every few months. Watching the line rise is its own motivation; catching it stall is an early warning.