Figures are illustrative only, ignore charges and tax, and are not a forecast or personal recommendation.
Net worth is the simplest single number for tracking overall financial progress: everything you own (your assets) minus everything you owe (your liabilities). This calculator adds up common categories of both and shows the resulting estimated net worth instantly as you fill in each field.
What counts as an asset
The calculator groups assets into cash and savings, ISAs, other investments (such as a General Investment Account or shares held outside a wrapper), pensions, property value, and a catch-all "other assets" category for anything else of significant value (a car, valuable possessions, a business stake, and so on). Pension values are included here even though most pensions can't be accessed until a minimum pension age (usually from your late 50s, rising over time) — it's still part of your net worth, just a less liquid part than cash or ISA holdings. If you hold investments across an ISA, SIPP, and GIA, it may help to reference our guide to using a GIA once ISA and pension allowances are maxed to make sure you're capturing everything correctly by wrapper.
What counts as a liability
Liabilities cover your mortgage balance, any personal loans, credit card balances, and a catch-all "other debts" field for anything else outstanding (car finance, student loans if you consider them a liability for this purpose, and so on). For most UK homeowners, the mortgage is by far the largest liability, so getting a reasonably current balance figure (available from your most recent mortgage statement or online account) makes a meaningful difference to accuracy.
Worked example
Someone with £5,000 cash, £15,000 in ISAs, £8,000 in other investments, £60,000 in pensions, and a £280,000 property, against a £180,000 mortgage, £4,000 in loans, and £800 on credit cards, has total assets of £370,000 and total liabilities of £184,800 — giving an estimated net worth of £185,200. Property and pension values typically dominate this calculation for most people in the middle of their working lives, while cash and ISA balances often carry more weight for those earlier in their financial journey.
Why track net worth over time
A single net worth snapshot is useful, but tracking it every 6-12 months (using the same categories consistently) reveals your actual financial trajectory far more clearly than watching any one account balance in isolation — a mortgage being paid down and an ISA growing can both be moving your net worth in the right direction even in a month when neither individually feels like progress. Property values in particular can be estimated conservatively using a recent valuation, sold-price data for comparable local homes, or an online estimate, understanding these are all approximations rather than precise figures.
Frequently asked questions
Should I include my pension if I can't access it yet?
Yes — net worth measures total wealth, not just accessible wealth. It's still worth mentally noting which parts of your net worth are liquid (cash, ISA) versus illiquid (pension, property) for planning purposes.
How should I value my property?
A recent professional valuation is most accurate, but a reasonable estimate based on comparable recent sales in your area, or a conservative online estimate, is a sensible substitute for tracking purposes.
Should joint assets and debts be split 50/50 with a partner?
There's no single right answer — some people track household net worth together, others split shared assets and liabilities by an agreed proportion for their individual figure. Be consistent with whichever approach you choose over time.
My net worth is negative — is that unusual?
It's common, particularly earlier in adulthood or shortly after taking on a mortgage or student debt — a negative net worth in your 20s or 30s is not unusual and tends to improve steadily as debts are paid down and assets like pensions and ISAs grow, especially once regular investing is established as a habit.
Does this calculator save my figures?
No — nothing you enter is stored or sent anywhere; all calculations happen locally in your browser. Note down or screenshot your result if you want to compare it again in future.
Common mistakes when calculating net worth
A frequent mistake is over- or under-valuing illiquid assets, particularly property. Using an outdated valuation, or an optimistic online estimate that doesn't reflect the condition or exact location of a specific property, can significantly skew the overall figure — where possible, base property values on genuinely comparable recent local sales or a professional valuation, and revisit the figure at least annually rather than carrying forward an old estimate indefinitely.
A second mistake is forgetting smaller liabilities that still add up — buy-now-pay-later balances, an overdraft, a family loan, or a car finance agreement are all easy to overlook but should be included in "other debts" for an accurate figure. Similarly, on the asset side, forgetting employer share schemes, premium bonds, or cash held in less obvious places (a joint account, a savings app, a foreign currency account) can understate the true figure.
How often should I recalculate my net worth?
Every 6-12 months is a common cadence — frequent enough to see meaningful trends, infrequent enough that normal month-to-month account fluctuations don't create noise or unnecessary anxiety.
Should I count my car or possessions as assets?
You can include significant, genuinely valuable possessions (a car, for example) in "other assets" if you want a complete picture, though many people choose to exclude depreciating personal items and focus net worth tracking on financial and property assets, which is also a reasonable and common approach.
What's a "good" net worth for my age?
There's no single benchmark that applies to everyone, since it depends heavily on income, location, family circumstances, and life choices — tracking your own trend over time is generally more useful than comparing your figure to a generic external target or to other people's circumstances.
Should I include my spouse's or partner's assets and debts?
This is a personal choice — some households calculate a single combined net worth figure, while others prefer to track individual figures separately, particularly where finances aren't fully joint; whichever approach you choose, staying consistent makes tracking progress over time more meaningful.