Your net worth is your assets minus your liabilities: everything you own, minus everything you owe. It is the single most honest number in personal finance, because it captures your savings, your investments, your debts, and your progress toward financial independence in one figure. Yet most people have never calculated it, and many who try give up because the process feels complicated or depressing. It does not have to be either. This guide shows you a simple monthly system for tracking your net worth in under fifteen minutes, using a spreadsheet you already have.

What Counts and What Does Not

Start by listing your assets: cash in bank accounts, investment accounts, retirement accounts, and the current value of any property you own. Then list your liabilities: credit card balances, student loans, car loans, mortgages, and any other debt. Subtract the second list from the first, and that is your net worth. Two judgement calls matter. First, your home: include it at a conservative market value and include the mortgage as a liability, but remember that home equity is not spendable cash, so track it separately from your investable net worth. Second, your car and personal belongings: most trackers exclude them, because they lose value and you cannot easily sell them. Keep the list simple and consistent, because consistency matters more than precision.

A Fifteen-Minute Monthly Routine

Pick one day a month, such as the first Saturday, and set a repeating calendar reminder. Open your spreadsheet, update each account balance from your bank and brokerage apps, and update your debts. The whole job should take under fifteen minutes once the template is set up. Record the date, the total assets, the total debts, and the resulting net worth, plus your investable net worth excluding home equity. Over time, add a simple chart of the numbers. The chart is the point: watching the line rise month after month is motivating in a way that a single number is not, and it makes setbacks visible early, when they are still small and fixable.

What to Do With the Number Once You Have It

Net worth tracking is useful because it turns vague feelings about money into facts. Compare your number with benchmarks for your age: the average and median net worth by age give you a rough sense of where you stand, but your own trend matters more than any comparison. Use the number to test your FIRE progress: divide your investable net worth by your annual spending, and you can see how many years of expenses you have covered. If the number is falling, look at why: is it spending, debt, or a market drop? A market drop is normal and temporary; rising spending or debt is a problem you can fix. Review the trend every quarter, and use it to adjust your savings rate rather than to judge yourself.

Common Mistakes That Make Tracking Useless

The most common mistake is tracking too often. Checking your net worth daily turns normal market movement into anxiety, and it tempts you to make emotional changes. Monthly is enough. The second mistake is changing the method: if you include your car one month and exclude it the next, the trend is meaningless. Pick your rules and keep them. The third is hiding debts from the list, which makes the number a fantasy rather than a fact. Include everything you owe, even the debts you would rather forget. A net worth you can trust is worth far more than a flattering one.

Frequently Asked Questions

Q: How often should I calculate my net worth?

A: Once a month is ideal. Daily tracking creates anxiety, and yearly tracking is too slow to catch problems early.

Q: Should I include my house in my net worth?

A: Yes, at a conservative value, with the mortgage as a liability. But also track your investable net worth separately, since home equity is not spendable cash.

Q: What is a good net worth for my age?

A: Benchmarks vary, but your own trend matters more. Focus on whether your net worth is rising steadily and how many years of expenses it covers.