Net Worth Calculator
Total assets minus total debts, projected forward from your savings rate, asset growth and the payments you make toward debt.
What this calculator does
This calculator produces your net worth — total assets minus total debts — and then shows how it changes over time given your savings rate, the growth on your assets, and the payments you make toward debt. It returns your final net worth alongside the asset and debt balances that produce it.
The single figure is the point. Bank accounts, ISAs, pensions, property equity, and loans normally live in separate places and get looked at separately. Netting them into one number is the only way to see whether your overall position improved this year, which no individual statement can tell you.
When to use it
Use it as a periodic checkpoint — quarterly is about right — to see whether your position is genuinely improving. It is the most reliable single measure of progress, because it cannot be flattered by a good salary or obscured by a large mortgage the way individual figures can.
It is also the right calculation ahead of a major decision. Taking on a mortgage, funding a business, or choosing between overpaying debt and investing all move assets and liabilities together, and only net worth shows the combined effect. It is worth running too when a large purchase feels affordable on monthly cash flow — car finance often reduces net worth the day the agreement is signed.
Understanding the inputs
Total assets should combine everything you own at realistic current value: cash, Cash and Stocks and Shares ISAs, general investment accounts, pension fund values, Premium Bonds, property market value, vehicle trade-in value, and any business interest. Value property conservatively and cars at trade-in rather than purchase price.
Total debts is everything you owe at current settlement balance — mortgage, credit cards, car finance, personal loans, and overdrafts. Most UK planners exclude income-contingent student loans, which behave more like a graduate tax. The remaining fields project forward: monthly savings, asset growth rate, monthly debt payments, and years. Five to seven percent growth is reasonable if most assets are invested; use less if property equity dominates.
How is this calculated?
net worth calculator
A worked example
Suppose you own a home worth £340,000, hold £150,000 across pensions, £48,000 in ISAs, and a car worth £12,000 — total assets of £550,000. Against that sit a £215,000 mortgage, £11,000 of car finance, and £3,500 on a credit card, totalling £229,500. Your net worth is £320,500. A Plan 2 student loan is excluded on the reasoning above.
The composition tells you more than the level. Property equity accounts for £125,000 and pensions another £150,000, so only £48,000 is genuinely accessible before age 55. Liquid net worth — the £48,000 of ISAs set against £14,500 of car finance and credit card debt — is about £33,500, which is what you could actually reach in a crisis.
Limitations and assumptions
Net worth is a gross figure that ignores the tax sitting inside it. A pension is largely taxable on withdrawal beyond the 25 percent tax-free element, investments outside an ISA carry a capital gains liability, and selling a property costs 2 to 3 percent in fees. Two people with identical net worth can have very different sums genuinely available.
It also rests entirely on your valuations, and property and business values tend to run optimistic. The projection assumes steady asset growth with no market falls, no major purchases or sales, and no change in income — none of which holds across a decade. Treat the trajectory as a direction of travel rather than a forecast; projected investment returns are never guaranteed.
Common Questions
- What counts as an asset?
- Anything you own that could be turned into cash: current and savings accounts, ISAs, general investment accounts, pension pots, the market value of your home, vehicles, and any business interest. Value each at what you could realistically sell for today rather than what you paid. Household possessions are usually too small and too illiquid to bother with.
- Should I include my pension?
- Yes, at its current transfer or fund value. Some people leave pensions out because the money is locked until 55, rising to 57 in 2028, but net worth measures what you own rather than what you can spend. For defined benefit schemes, the cash equivalent transfer value is the usual figure to use.
- Does my student loan count as a debt?
- Arguably not, and most UK planners exclude it. Income-contingent student loans are repaid as a percentage of earnings above a threshold, are written off after 30 or 40 years depending on the plan, and are cancelled on death. They behave far more like a graduate tax than a conventional debt.
- How do I value my house?
- Use a conservative estimate of the achievable sale price, then deduct roughly 2 to 3 percent for estate agent fees and legal costs if you want the figure you would actually walk away with. Online valuation tools can be out by 10 percent in either direction, so treat them as a starting point.
- What is a good net worth for my age?
- ONS wealth and assets data puts median household total net wealth at around £293,700, though that figure includes pension wealth and is heavily skewed by property and age. Treat benchmarks as context rather than targets — your trajectory over five years says far more than your position against a median.
- Why is my net worth negative?
- Usually car finance, credit card balances, or a recently purchased home where fees and stamp duty have not yet been recovered by price growth. A negative figure that is rising each quarter is a very different situation from one holding flat. Track the direction for a few quarters before reading anything into the level.
- How often should I calculate it?
- Quarterly works best. Monthly makes market movement feel like progress or failure, and annually is too infrequent to catch a drift. Use the same valuation approach each time so comparisons are meaningful — consistency matters more than precision here.
- Does net worth account for tax I will owe?
- No, and it is a real gap. A £200,000 pension pot is largely taxable on withdrawal beyond the 25 percent tax-free element, so it is worth perhaps £160,000 net. Investments outside an ISA carry an embedded capital gains liability, while ISA balances are worth their full face value. Net worth is a gross measure.
- Is net worth more useful than income?
- For measuring financial position, yes. Income tells you what passes through; net worth tells you what stayed. Two people earning £90,000 can have net worths hundreds of thousands apart, explained entirely by what they spent. Income is a rate, net worth is the accumulated result of it.
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