How to Calculate Your Net Worth (and What It Tells You)

Net worth is the only personal finance number that captures everything at once. Income tells you about one year. A savings balance tells you about one account. Net worth is the whole picture in a single line, which makes it uncomfortable the first time and useful every time after that.

What counts, and what people get wrong

Assets are cash and savings, retirement and pension accounts, investments, property at what it would sell for today, and vehicles at resale value. Liabilities are the mortgage, car finance, student loans, credit card balances and anything owed to family.

Two mistakes account for most of the errors. The first is valuing assets at what they cost rather than what they are worth. A car bought for $32,000 three years ago might fetch $19,000 now, and using the purchase price inflates your net worth by $13,000 of pure fiction. The second is forgetting liabilities that do not arrive as monthly bills, such as a tax bill due in January or an interest-free furniture agreement.

Things that are not assets

Furniture, clothes, most electronics and the contents of the garage. If selling it would take a weekend and return a few hundred pounds, leave it out. It adds noise without changing anything. Include a possession only if it is genuinely liquid and genuinely valuable, such as a second vehicle, or a watch or piece of jewellery with an established resale price.

Reading the number

A single net worth figure means very little on its own. The interesting part is the change between two of them.

Suppose the household above checks again a year later and lands at $198,000. That $18,000 rise breaks into parts: roughly $4,900 of mortgage principal repaid, $9,000 of new retirement contributions, and the rest from market movement and the car falling in value. Only the first two were under their control, and knowing that is the point of measuring at all.

Liquid net worth

Work out a second figure that excludes your home and your pension, because neither is reachable in a hurry. For this household, liquid net worth is $12,000 minus the car debt, which is $3,000. That is a very different story from $180,000, and it is the number that determines what happens when the roof leaks. If it looks thin, our guide to how much of an emergency fund you need is the place to start.

How to use the net worth calculator

Gather the figures before you start, or you will guess at half of them. Cash and savings from your banking app. Retirement accounts from the most recent statement, or the current transfer value for a UK defined-benefit pension. Property from recent sale prices on your street rather than an automated estimate, which tends to run high. Vehicles from a trade valuation site, using the trade-in figure. Debts from current statements, taking the settlement balance rather than the original amount borrowed.

Do it on the same date each year

Pick a date, 1 January or your birthday, and repeat it. Consistency matters more than precision, because you are tracking a trend and any systematic error cancels out. If you want a benchmark for the retirement portion, retirement savings by age gives a rough sense of pace.

Common questions

Should I include my house? Yes, at market value, with the outstanding mortgage listed as a liability. Leaving both out is also consistent, and some people prefer it, but never include one without the other.

Is a negative net worth bad? Not necessarily. A recent graduate with student loans and a new car will be negative, and so will many homeowners in the first year or two after buying. What matters is whether the number is climbing.

What is a good net worth for my age? There is no threshold worth taking seriously, because the answer depends on where you live, when you bought a house, and what pension arrangements you have. Compare yourself to your own figure from last year.

How often should I check it? Once or twice a year. Monthly checks turn a long-term measure into a mood tracker, and market movement between checks tells you nothing about your decisions.