How do you calculate networth? You add up everything you own, subtract everything you owe, and the remainder is your networth. That is the whole formula. What changes the answer is how carefully you value the items on each side, and that is where most mistakes happen.
The formula, written out
Networth = total assets − total liabilities. Assets are things with a positive value you could sell or collect. Liabilities are obligations that you must pay. Nothing else is needed, and no special software is required.
Fine print on the asset side
Cash is easy because a dollar is a dollar. Investments are valued at the latest market price, which means the number moves every day. Property is valued at what a buyer would likely pay, not what you hope for. Retirement accounts count in full, though some people show an after-tax estimate because withdrawals can be taxed.
Business interests are the hardest. If you own part of a private company, a common rule of thumb is to use a conservative multiple of annual profit, or the price paid in the most recent funding round. Neither is perfect, so label the entry as an estimate.
Fine print on the liability side
Use the balance you would need to pay off today. For a mortgage, that is the principal remaining rather than the original amount. For credit cards, include the statement balance plus charges not yet billed. Do not include future rent or ordinary monthly bills, because those are expenses, not debts on the balance sheet.
Assets versus expenses: a quick sorting table
| Item | Where it goes |
|---|---|
| Savings account | Asset |
| Car loan balance | Liability |
| Monthly phone bill | Neither (expense) |
| Money a friend owes you | Asset, if you expect to collect |
| Unpaid tax bill | Liability |
Why accountants separate current from long-term items
In a company, the balance sheet splits both sides into short-term and long-term pieces. You can borrow the idea for personal use: keep a “liquid” group (cash, brokerage) and an “illiquid” group (house, retirement). Two people with the same total can face very different risks if one holds mostly illiquid assets. Our article on calculating your networth in five steps shows a template that includes this split.
Does age change the formula?
No. The formula is identical for a student and a retiree. What changes is how you interpret the result. A common rule of thumb popularised by the book The Millionaire Next Door multiplies your age by your pre-tax income and divides by ten to suggest a target. It is a rough yardstick, not a rule, and plenty of sensible people fall below or above it. The Investopedia net worth entry is a good reference for definitions.
Keeping the number honest
Use the same valuation rules every time. If you counted your car at trade-in value last year, do it again this year. Consistency makes year-to-year comparisons meaningful, even if every individual value is a little off.
What a changing number tells you
If the networth grows because you saved more or paid down debt, that is progress you can influence. If it grows only because the market rose, enjoy it but do not rely on it. If it falls because of a market dip, check whether your savings habits are unchanged; they are the part you control.
FAQ: how do you calculate networth
Is there a calculator I can use?
Yes, many banks and budgeting sites offer one, but a spreadsheet gives you more control.
Should I use today’s price or my purchase price?
Use today’s estimated market price for assets and today’s payoff for debts.
Do I count a pension?
If it has a clear transfer value, yes. Otherwise note it separately.
How often should I recalculate?
Every quarter or once a year is enough for most people.
This guide is general information and not personalised financial advice.
Related reading: The Royal Family’s Net Worth · How to Find Out Someone’s Net Worth Using Public Sources
Figures are reported estimates as of 2026 and change often. This article is for general information and is not financial advice.
