Check your net worth once a month, on the same day, and judge the trend over three to twelve months instead of any single month. List what you own, list what you owe, subtract, write down one sentence about why it changed, and move on. The whole thing takes about twenty minutes. This article is based on Episode 3 of The Wealth Track, my personal finance podcast. You can watch it below or listen on Spotify.
A quick note: I'm not a financial advisor. The numbers below are made up to illustrate the idea, and they are not a prediction.
Why checking more often backfires
Picture a Tuesday night. You can't sleep, so you open your investing app and your balance is down $3,000 from last week. You check again. And again the next morning. By Friday you're refreshing it between meetings.
Checking more often didn't make you feel more in control. It made you feel less. But never looking isn't the answer either, because then you're guessing about one of the most important numbers in your financial life.
A monthly check sits in the middle. It's frequent enough to learn something and rare enough that it doesn't run your mood.
Step 1: List it, then subtract it
Net worth is what you own minus what you owe. There's no special math.
Pick one day a month. The last day or the first day both work. What matters is that it's the same day every time.
- List your assets: cash in checking and savings, investment and retirement accounts, what your home is worth, what your car is worth.
- List your debts: mortgage, car loan, student loans, credit card balances.
- Subtract your debts from your assets.
A worked example
Let's use an illustrative person named Sam.
| Assets | Amount | Debts | Amount |
|---|---|---|---|
| Cash | $20,000 | Mortgage | $240,000 |
| Investments | $60,000 | Car loan | $8,000 |
| Home (estimate) | $300,000 | Credit card | $2,000 |
| Car (estimate) | $15,000 | ||
| Total | $395,000 | Total | $250,000 |
$395,000 minus $250,000 gives Sam a net worth of $145,000.
Two notes on doing this yourself:
- Home and car values are estimates. Use a reasonable number and don't redo it every month. A couple of times a year is plenty.
- Write the number down. A notebook, a spreadsheet, or an app all work. The number alone isn't the point. The record is.
If you want the longer version of this step, I wrote a full guide on how to calculate your net worth.
Step 2: Watch what happens over three months
Here's where the habit starts to pay off. Let's follow Sam for three months.
Month 1. Net worth is $145,000. That's the starting line.
Month 2. The stock market has a rough month. Sam's investments lose about $4,000 from market moves. But she also:
- put $1,000 from her paycheck into investments
- saved another $1,000 in cash
- paid down $500 on the mortgage and $300 on the car loan
Her net worth is now $143,800, down $1,200. If Sam only looked at that number, she might think she did something wrong. She didn't. She did everything right, and the market had a bad month.
Month 3. The market bounces. Her investments gain about $5,000, and she contributes another $1,000. She saves another $1,000 in cash and pays down another $500 on the mortgage and $300 on the car. Her net worth is now $151,600, up $7,800 in one month. If Sam only looked at that, she might think she's a genius. She's not that either.
Month two felt bad. Month three felt great. Neither told her very much.
Now look at all three together: from $145,000 to $151,600, up $6,600. That's the trend, and the trend is the story.
One honest caveat. Markets don't always bounce back in a month, or even in a year. This is an illustration, not a forecast.
Step 3: Split the change into what you control and what you don't
So what made up that $6,600? Break it down:
| Source | Amount |
|---|---|
| Cash saved | $2,000 |
| Added to investments | $2,000 |
| Debt paid down ($1,000 mortgage, $600 car) | $1,600 |
| From Sam's own decisions | $5,600 |
| Market moves (-$4,000, then +$5,000) | +$1,000 |
| Total change | $6,600 |
Most of the change came from things Sam controls. She doesn't control the market. She controls her savings, her contributions, and her debt payments.
So when you do your monthly check, add one small step. After you note the change, ask: how much of this came from me, and how much came from the market? If the market drove it, in either direction, shrug and move on. If you drove it, that's the part worth paying attention to.
In some years the market will be a bigger piece than your savings. This example is built to be simple, and real life is messier. If you want to separate contributions from performance in your own portfolio, flow-adjusted returns explain why a raw balance change can mislead you.
Why ignoring small swings is a strategy
Looking away from small swings isn't laziness. There are two good reasons.
Drops are normal. In its Household Balance Sheet Summary for the first quarter of 2025, the Federal Reserve Board's Z.1 report showed household net worth falling by $1.73 trillion. That's every household in the country, in a single quarter. I'm not saying that to scare you. It's a reminder that net worth goes down sometimes, even at that scale.
Reacting to swings can be expensive. J.P. Morgan Asset Management's guide for retirement investors on navigating market volatility says that if an investor missed the 10 best market days over the past two decades, the portfolio would have nearly been cut in half. Ten days, over twenty years, and nobody knows in advance which days those will be.
That's one data point about what can happen when you jump in and out, and past performance doesn't guarantee future results. I'm not saying you can never change your investments. My takeaway is simpler: a monthly check is a habit, and a daily check is a trap. It's like weighing yourself every hour. The number moves for reasons that don't mean much.
Here's my rule. If the change is small, up or down, I note it and move on. I only dig in when something big changes, like a new debt, a job change, or a large purchase.
Three things to start this week
- Pick your day. Put a recurring reminder on your calendar. Same day every month.
- Log the number and one sentence about why it changed. Something like: "market down, saved a thousand, paid down the car." After a year you'll have twelve sentences, and they tell you a lot.
- Judge the trend, not the month. Compare today to three months ago or twelve months ago, not to last week.
If you need to, move your investing app off your home screen. The whole routine should take about twenty minutes. No dashboards to stare at and no daily check-ins.
Tracking it in NetTrack
A notebook works fine for this. The habit matters more than the tool. But if you'd rather not build the spreadsheet yourself, that's why I built NetTrack. It brings your accounts, investments, property and debts together into one number and keeps your net worth history, so the trend is there when you sit down on your chosen day. There's a free plan if you want to try it. If you'd like to see what moved your number from one month to the next, the post on net worth attribution covers how that works.