Budget Calculator
Find your monthly surplus and what share each category takes.
Add up everything you own, subtract everything you owe, and see the one number that tracks financial progress better than income does — along with how much of it you could actually reach this month.
Estimates only. The result depends entirely on the assumptions you enter. Rates, fees and tax rules vary by lender and by country, and none of this is financial, tax or investment advice. Confirm figures with a qualified adviser or the institution before you commit to anything.
Net worth is the one number that captures your whole financial position. Income tells you what is flowing; net worth tells you what has accumulated, and it is the only figure that moves when you pay down debt as well as when you save.
Do this once a quarter, in the same order, using the same sources. The value is entirely in the trend — a single reading tells you almost nothing, and four readings a year for three years tells you a great deal.
The simplest equation in personal finance, and the hardest to fill in honestly.
| Symbol | Meaning | Unit | Typical range |
|---|---|---|---|
Assets | Everything you own, at market value | currency | — |
Liabilities | Everything you owe, at current balance | currency | — |
Net worth | Assets − Liabilities | currency | — |
Debt-to-asset | Share of your assets funded by debt | % | 0 – 100+ |
Liquid net worth | What you could reach quickly | currency | — |
The debt-to-asset ratio is the figure that adds information the headline hides. Two people with $274,500 of net worth are in very different positions if one holds $550,000 of assets against $275,500 of debt and the other holds $290,000 against $15,500. The first is leveraged; the second is not.
| Assets | Amount | Liabilities | Amount |
|---|---|---|---|
| Cash and savings | $12,000 | Mortgage | $248,000 |
| Investments | $48,000 | Loans | $14,500 |
| Retirement accounts | $126,000 | Credit cards | $3,200 |
| Property | $340,000 | Student debt | $9,800 |
| Vehicles | $18,000 | Other debt | $0 |
| Other assets | $6,000 | ||
| Total | $550,000 | Total | $275,500 |
Notice the distance between $274,500 of net worth and $42,300 of liquid net worth. Most of the wealth is in a house that has to be lived in and a pension that cannot be touched for decades. That gap is normal, and it is exactly why net worth alone is a poor guide to whether next month is going to be comfortable.
A single net worth figure is close to meaningless without context. Three readings make it useful.
The direction. Is it higher than last quarter? By how much, and why? A rise driven by paying down debt is worth more than an identical rise driven by a property valuation, because one is realised and the other is an opinion.
The composition. Net worth concentrated in one illiquid asset behaves very differently from the same figure spread across cash, investments and property. The donut on this page is there to make concentration visible.
The leverage. The debt-to-asset ratio tells you how much of what you own is really the bank's.
| Ratio | What it usually means | Main risk |
|---|---|---|
| Under 30% | Low leverage, substantial equity | Possibly under-using cheap credit |
| 30 – 50% | Typical for a mortgaged household | Manageable if income is stable |
| 50 – 70% | Meaningfully leveraged | A valuation fall erodes equity fast |
| Over 70% | Highly leveraged | Small shocks can push net worth negative |
The worked example sits at 50.1% — right at the boundary, which is entirely normal for a household with a large mortgage and a couple of decades still to run on it. What would matter is whether that ratio falls each year.
Five ways this calculation goes wrong, and how to avoid each.
Valuing at purchase price. Cars, electronics and furniture lose value fast. Use what you could actually sell for today, and when in doubt, use less.
Forgetting a liability. Interest-free retail credit, buy-now-pay-later balances, an overdraft you always run, tax due in January. These are real debts and they are easy to leave off because they do not arrive as statements.
Counting a pension you cannot access at its full value. Include it — it is genuinely yours — but understand that a defined-contribution pot of $126,000 is not $126,000 of spendable money, and the liquid tile exists to keep that distinction in front of you.
Including future income. A salary is not an asset. Neither is an expected inheritance or a bonus that has not been paid. Net worth is a snapshot of what exists now.
Treating it as a score. Net worth is heavily influenced by age, country, housing market and inheritance, none of which are achievements. The only honest comparison is with your own figure a year ago.
Two tools pair naturally with this one. The budget calculator explains why the number moved, since net worth changes through monthly surplus and debt repayment. And the debt payoff calculator models the fastest route to shrinking the right-hand side, which is usually the quickest way to move net worth for anyone carrying consumer debt.
One habit worth adopting from the start: keep the figures somewhere you can compare them. A note with four lines a year — date, assets, liabilities, net worth — becomes genuinely valuable after about three years, because it converts a number that means very little in isolation into a trend that means a great deal. Most people who track net worth consistently report that the tracking itself changed their behaviour before any strategy did, simply because a quarterly measurement makes an expensive month visible.
And if the figure is uncomfortable, that is information rather than a judgement. Almost everyone who now has a healthy net worth once had a bad one, and the only variable they controlled was the gap between what came in and what went out.
Add up everything you own at today's market value, add up everything you owe at current balances, and subtract the second from the first. $550,000 of assets against $275,500 of debt gives a net worth of $274,500. The arithmetic is trivial; the honesty of the inputs is the hard part.
Yes — at a realistic market value, with the outstanding mortgage in the liabilities. Including the house without the mortgage is the most common error in this calculation and can overstate net worth by hundreds of thousands.
Yes, for defined-contribution pots where a balance exists. Defined-benefit schemes are harder — a transfer value is the usual proxy, though many people simply exclude them and treat the resulting figure as conservative.
Not necessarily. It is normal early in a career with student debt, a new mortgage and few accumulated assets. What matters is whether it is moving in the right direction. A negative figure improving by $10,000 a year is a healthier position than a positive one standing still.
Cash and investments minus short-term debt — what you could realistically reach within a month. In the worked example it is $42,300 against a headline net worth of $274,500, and it is the figure that determines how a sudden expense actually feels.
Quarterly is plenty. Monthly invites over-reaction to market noise, and yearly is too infrequent to catch a trend going wrong. Use the same sources and the same order each time so the comparison is real.
Yes, at resale value rather than purchase price, with any outstanding finance in the liabilities. A financed car often contributes very little net, which is itself worth seeing on the page.
Below 50% is comfortable for most mortgaged households and falls naturally as the mortgage amortises. Above 70% leaves little room for a valuation fall. Context matters more than the threshold: a low ratio with no savings is not obviously better than a higher one with a full emergency fund.
No. Income is a flow and net worth is a stock. A high earner who spends everything can have a lower net worth than a modest earner who has saved for twenty years, which is precisely why this figure is worth tracking separately from your salary.
Increase the gap between income and spending, then direct it at whichever side moves faster. Clearing a 22% credit card is a guaranteed 22% return; investing a surplus is a probable single-digit one. The budget calculator finds the gap and the debt payoff calculator prioritises the debt.
Six tools that pick up where this one leaves off.
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MortgageRun snowball against avalanche and see what the difference costs.
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