Net worth tracking
Assets minus debts gives one number to check each month. Here is what to include and what to leave out.
Net Worth Tracking
A household earning $120,000 a year, driving two financed cars and paying a $1,900 mortgage, can be worth less than a single nurse earning $45,000 who has saved 15% of her pay for two decades. On $45,000, a 15% savings rate is $562.50 a month. At 8% a year that is about $102,907 after ten years and $331,324 after twenty. Nothing about that is a trick. It is what compounding does when a savings rate is allowed to run.
One number, and why it beats your salary
Income measures what passes through your hands. Net worth measures what stays. You can raise the first for thirty years and finish with nothing, because the two move independently and only one of them accumulates.
Net worth is one subtraction: assets minus liabilities. Assets are what you own at a price you could get this month. Liabilities are what you owe today. Everything else, from budget categories to the app you use, is detail.
$73,000 of assets, $34,500 of debts. Net worth is $38,500, and that one figure is what you track.
Illustrative household.
Most people can quote their salary to the dollar and have no idea what their net worth is. That asymmetry explains a lot of bad decisions. Take two savers on the same $45,000 salary, one keeping 5% of it and one keeping 15%:
- 5% savings rate
- 15% savings rate
The gap is $220,883 after twenty years, and it was created by behavior, not by a raise.
Illustrative. $45,000 salary with no raises, 8% annual return compounded monthly, starting from zero.
What to count, and what to leave out
The list matters less than the honesty. Two rules keep it useful: use a price you could actually get this month, and never count something you would not sell.
| Count it | Leave it out |
|---|---|
| Checking and savings, at today's balance | Furniture, electronics, clothing |
| Brokerage, 401(k) and IRA at market value | The car at the price you paid |
| Home value minus selling costs, discounted 5–10% | Anything you would refuse to sell |
| Vehicles at real resale value | Expected inheritances and bonuses |
| Mortgage, loans, card balances, student debt | Rent and utility bills, which are monthly costs, not debts |
A car is the classic distortion.
- Asset
- $28,000
- Better: $19,000
- Loan still owed
- $14,000
- $14,000
- Adds to net worth
- $14,000
- Better: $5,000
VerdictCounting the sticker price invents $9,000 of net worth that does not exist. Three years after purchase the car is worth what a buyer would pay today, and nothing more.
Illustrative. A car bought for $28,000, worth $19,000 three years later.
What the number tells you that income cannot
Tracking earns its place through what it exposes. It shows whether raises became wealth: a $6,000 raise absorbed by a newer car and a bigger apartment shows up as a flat net worth, even though the salary chart looks great. It shows which side is failing, because assets growing while debts grow faster is a specific, fixable problem. And it makes progress visible that no single month ever shows.
Read the trend against what the market did, and each combination points somewhere different:
| Your net worth | The market | What it usually means |
|---|---|---|
| Rising | Flat or falling | Your savings rate is doing the work, which is where you want to be |
| Rising | Rising | Good, but check how much is market and how much is you |
| Falling | Falling | Usually just prices. Keep going |
| Falling | Rising | New debt arrived quietly while the investments did the visible work. Take this one seriously |
Running it without making it a hobby
- 01Log in everywhereEvery account, loan and card, on the same day
- 02Write down the assetsBalances and market values as they are today
- 03Write down the debtsCurrent balances, plus any rate that changed
- 04Subtract, date it, add one sentence"Market down, savings on track" is useful eighteen months later
The first time takes about ninety minutes. After that, each update takes fifteen.
Pick four dates a year
Quarterly, on the same dates, so the intervals compare. More often turns tracking into scrolling.
Update both sides at once
Half an update is a wrong number.
Review the trend, not the quarter
Compare against twelve months ago. A single quarter says almost nothing.
Recheck the rates on your debts
A card rate that rose quietly changes the whole picture and rarely announces itself.
The mistakes that make the number meaningless
Counting things that lose value. Furniture and electronics resell for close to nothing. Including them pads the number and teaches you nothing.
Treating a home estimate as a valuation. Online estimates give a range, not a price. Take the lower end and subtract selling costs, or you are counting money you would lose on the way out.
Leaving out retirement accounts. A 401(k) or IRA is a real asset even though you should not spend it next year. Leaving it out makes long-term planning look bleaker than it is.
Reacting to one bad quarter. A $10,000 market drop in a single quarter is noise in a twenty-year series. The number will recover; the habit will not if you quit over it.
Comparing yourself to other people. What you see of others is their spending. You cannot see their debts, and visible spending is often financed.
Why the habit is worth keeping
The first time the number is negative, or smaller than expected, that is information rather than a verdict. A student loan and a card balance at 26 is a starting position, not a character flaw. What changes behavior is watching a number you control move because of decisions you made: a savings rate raised by two points, a card cleared, an account that crossed a threshold you set yourself.
Earning more is the goal most people set. Keeping more is the one that shows up in the number that compounds. Watch your own for a year and you will know the difference between a good month and a good year, which is the whole point.
56 more deep dives are in the Navigator library.
