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How to Calculate Your Net Worth (and What It Actually Tells You)
Net worth is everything you own minus everything you owe. The arithmetic takes ten minutes; deciding what belongs on each side of the line is where the judgement is.
Net worth is the total value of what you own minus the total of what you owe. It is a snapshot of a single moment, not a measure of income, and a high earner with large debts can easily have a lower net worth than someone earning half as much.
The formula
Assets are things with a realisable value: cash, savings, investments, retirement accounts, property, vehicles, and any money genuinely owed to you. Liabilities are balances you owe: mortgage, car finance, student loans, credit cards, personal loans, overdrafts and unpaid tax.
The word that does the work on the asset side is 'realisable'. An asset belongs in the calculation at what you could sell it for today, not what you paid for it and not what you feel it is worth.
Net worth = Total assets - Total liabilities
Worked example
Net worth here is 339,700 - 198,350 = 141,350.
Two details in that table are worth calling out. The home appears at what it would sell for, not the purchase price or the outstanding mortgage. And the car appears at resale value, which for most vehicles is well below what was paid — a car bought for 22,000 three years ago is not a 22,000 asset.
| Assets | Amount | Liabilities | Amount |
|---|---|---|---|
| Current account | 2,100 | Mortgage balance | 178,000 |
| Savings | 9,400 | Car loan | 6,850 |
| Retirement account | 41,500 | Credit card | 2,300 |
| Index fund holdings | 12,700 | Student loan | 11,200 |
| Home (market value) | 265,000 | ||
| Car (resale value) | 9,000 | ||
| Total assets | 339,700 | Total liabilities | 198,350 |
What to include and what to leave out
The bias to guard against runs in one direction. People tend to value assets optimistically and to forget small liabilities, both of which flatter the result. If you want the number to be useful over time, err low on assets and complete on debts.
- Include: bank balances, savings, brokerage and retirement accounts, property at current market value, vehicles at resale value, and valuables you would realistically sell.
- Include on the liability side: every outstanding balance, including interest-free instalment plans and buy-now-pay-later arrangements that are easy to forget.
- Leave out: future income, an expected bonus, an inheritance that has not happened, and the value of your skills or a business you could not actually sell.
- Leave out ordinary possessions. Furniture, clothing and electronics have low resale value and add noise without changing the picture.
- Handle a private business carefully. Include it only if you have a defensible basis for the figure, and note the basis alongside it.
Why the trend matters more than the total
A single net worth figure is hard to interpret. There is no target it should hit at a given age that accounts for where you live, what you earn and what your circumstances are.
What the number does well is show direction. Calculate it on the same date each quarter using the same method, and the change between readings tells you whether your position is improving, and roughly why.
A rise can come from three places: paying down debt, saving new money, or an asset increasing in value. Those are not equivalent. Debt repayment and new saving are things you did. An increase in your home's estimated value is a market movement that could reverse, and a net worth that only rises because of asset prices is more fragile than one rising because balances are being cleared.
Errors that distort a net worth figure
- Recording a property at purchase price years after buying it, in either direction.
- Counting a pension at its projected future value rather than its current balance.
- Omitting interest-free instalment plans because they feel unlike debt. They are still balances owed.
- Changing the valuation method between readings, which makes the trend meaningless.
- Including the resale value of a mortgaged property while forgetting to include the mortgage — this one produces a dramatically wrong figure.
- Treating a negative net worth as a verdict. It is common and expected early in a mortgage or after study, and the trend is the thing to watch.
Assumptions and limitations
Net worth assumes every asset could be converted to cash at the value you listed. In practice, selling takes time and costs money — estate agent fees, transaction costs and tax on gains can take a meaningful share of the headline figure. A net worth of 141,350 is not 141,350 of spendable money.
It also says nothing about liquidity, which is often the more urgent question. Someone whose net worth sits almost entirely in property and a pension may be unable to cover a 2,000 bill next week. That is why net worth and an emergency fund answer different questions and both are worth tracking.
Finally, it ignores the cost of servicing the liabilities. Two people with identical net worth can be in very different positions if one owes at 3% and the other at 22%. Read the number alongside the interest rates behind it rather than on its own.
Use net worth as a trend, not a verdict
A net-worth figure is a snapshot: assets minus liabilities at a particular date. Its value becomes clearer when calculated using the same definitions and updated consistently. A falling number is not automatically a problem—for example, buying an asset with cash can change the composition of your balance sheet without creating the same kind of loss as an ordinary expense.
Frequently asked questions
How often should I calculate it?
Quarterly is enough for most people. Monthly adds little beyond normal market noise, and annually can be too infrequent to notice a drift in the wrong direction.
Should I include my pension?
Yes, at its current stated balance. It is a real asset even though it is not accessible yet, and leaving it out makes long-term progress invisible.
Is a negative net worth a problem?
Not on its own. It is normal shortly after taking on a mortgage or finishing education. The concern is a negative figure that is getting more negative over several readings.
Does my salary affect net worth?
Only indirectly. Income becomes net worth when it is saved or used to pay down debt; income that is fully spent does not move the figure at all.
Should a primary home be included in net worth?
If you own it, its estimated value can be listed as an asset and the associated mortgage as a liability. The valuation method should be consistent over time.
Why track net worth more than once?
A series of comparable calculations shows whether assets, liabilities and overall financial position are changing over time.
Conclusion
Net worth is a short subtraction built on honest inputs: assets at what they would sell for today, and every liability included, however small. Calculate it the same way each quarter and read the direction rather than the total. A figure that rises because debts are falling and savings are growing is telling you something different from one that rises because an estimated property value went up, and distinguishing between them is most of the value in tracking it at all.
Figures in this article are illustrative. Results depend on your own rates, fees, taxes and circumstances, and are for educational and planning purposes rather than financial advice.