Net Worth Projection Calculator
What you own, what you owe, and what you add each year
Your result will appear here
Fill in the fields on the left and this updates as you type.
Know what this estimate is based on
- Jurisdiction
- General mathematical model
- Scope and limitations
- Planning estimate only. Enter complete, current figures and keep an appropriate buffer for irregular or unexpected expenses.
- Source links checked
- Jul 30, 2026
Built and regression-tested by Smart Tools Lab. It has not been individually reviewed by a licensed financial, tax, or legal professional.
How to use
- 01
Enter the asset side first — cash and savings, investments (brokerage, 401(k), IRA and HSA together), the home's market value, and anything else worth counting under other assets.
- 02
Enter the debt side: the mortgage balance, then every other loan — student loans, car loans, credit cards — in the other-debt field.
- 03
Add what you put in each year: the annual saving figure, and separately the principal your loan payments retire. Principal counts and interest does not, because only principal changes the balance sheet.
- 04
Set the growth assumptions — the expected return on investments, home appreciation (leave it at 0 to hold the house flat), and how many years to project.
- 05
Set inflation, then read the headline against the today's-money figure beside it. The year-by-year table carries both columns, and the chart draws the nominal path, what you put in, and the real line together.
Formula
Net worth today = cash + investments + home + other assets − mortgage − other debt. Then, each year: cash × (1 + cash yield); investments × (1 + return) + annual saving; home × (1 + appreciation); other assets unchanged; and the principal figure is applied to the other debt first, then to the mortgage, clamped to what is actually left. Net worth for that year is the new asset total less the new debt total. The today's-money column divides each year's figure by (1 + inflation) raised to that year. "What you put in" is today's net worth plus every dollar of saving and principal since; growth is the projection minus that.
Example
$18,000 of cash, $145,000 of investments, a $420,000 house and $28,000 of other assets, against a $268,000 mortgage and $34,000 of other debt — $309,000 of net worth today. Saving $18,000 a year rising 2%, retiring $9,600 of principal a year, at a 6.5% return with 3.5% home appreciation and 4% on the cash, over twenty years: $2,119,159. Of that, $938,353 passed through your hands — the $309,000 you started with, $437,353 of saving and $192,000 of principal — and $1,180,806 is growth, 56% of the finish. The crossover falls in year 4. At 2.5% inflation the same pile buys what $1,293,261 buys today, a gap of $825,898. Home equity ends at $725,711 and $110,000 of debt is still outstanding.
Definitions
- Net worth
- Everything you own at market value, less everything you owe. One subtraction, done on a single date — it says nothing about income or cash flow.
- Nominal vs real
- Nominal is the number that will be on the statement. Real is that number restated in today's prices, so it can be compared with what you have now.
- Principal
- The part of a loan payment that reduces the balance. The rest is interest, which leaves the household and never touches the balance sheet.
- Crossover
- The year cumulative investment growth exceeds everything you have contributed since the projection began. After it the portfolio is doing more of the work than you are.
- Home equity
- The house at market value less the mortgage. It counts fully toward net worth and almost not at all toward what you could spend this month.
Good to know
A balance sheet is not a savings account
Most projection tools take one number — call it savings — and grow it. A household balance sheet does not behave that way, and the difference matters more than the return assumption does. Four things are moving at once and none of them move at the same rate. Cash sits in a savings account earning something close to short rates. Investments compound at whatever equities and bonds do. A house appreciates at its own pace, which historically tracks something nearer to inflation plus a little than to the stock market. And the debt side shrinks on a schedule set by an amortisation table rather than by a market. Collapsing all four into one growth rate is the single most common way a projection goes wrong, and it goes wrong in a specific direction: it grows the house and the cash at the stock market's rate, which flatters the finish substantially for the very households — homeowners with a mortgage — who most want the answer. This page keeps the four pots separate for exactly that reason, and it holds vehicles and business equity flat because no defensible rate exists for them.
Debt paydown is the invisible half of the answer
Ask someone what they saved last year and they will name their 401(k) contribution. Ask what their net worth did and the answer is usually larger, because a mortgage payment has been quietly retiring principal every month. Net worth is what you own less what you owe, so a dollar off a loan balance moves it exactly as far as a dollar into an index fund — and it moves it with certainty rather than with the market's permission. At this page's defaults, $9,600 a year of principal is $192,000 over twenty years, more than a fifth of everything the household contributes across the horizon. The distinction the field insists on is principal against interest. Only principal touches the balance sheet; interest leaves the household entirely and appears nowhere on it. Early in a thirty-year mortgage the split is heavily interest, and late in one it is heavily principal, which is why the same monthly payment builds net worth at wildly different speeds depending on where in the schedule you are. Your loan statement gives the split, and the principal half is the number that belongs in the field.
Two dollars, and only one of them is a standard of living
A projection that reports $2,119,159 in twenty years and stops there has told you something true and slightly misleading. That is a nominal figure — the number that will be on the statements — and it is measured in dollars that will buy less than today's. Deflating it at 2.5% gives $1,293,261, which is what that pile would buy at today's prices, and the $825,898 difference is not a rounding issue: it is 39% of the headline. Both figures are legitimate and they answer different questions. Use the nominal number to check whether a balance clears a nominal threshold, like a mortgage payoff or an estate tax exemption. Use the real number for everything that is about how you would live. There is one trap in setting inflation to 0, which the page allows: it collapses the two columns and the result is only honest if the return you entered is also a real, after-inflation figure. A 6.5% nominal return with 2.5% inflation is a 4% real one, and mixing a nominal return with zero inflation overstates a twenty-year finish by roughly two thirds.
The crossover, and why the horizon beats the rate
The most useful single statistic a long projection produces is not the finish. It is the year cumulative growth passes everything you have contributed since the projection began. At this page's defaults that lands in year 4, which surprises people until they notice why: $309,000 of net worth is already compounding on day one while the contributions are only just starting to arrive. For a household starting from nothing the crossover sits far later, often in the second decade, which is exactly the experience people describe when they say the first hundred thousand felt impossible and the second felt automatic. What the crossover really measures is how much of your outcome is under your control. Before it, saving harder is the effective lever and the return assumption barely matters. After it, the balance is large enough that a percentage point of return moves the finish more than a large increase in contributions would, and the horizon does more work than either. That is the honest case for starting early rather than saving heroically later, and it is visible in the chart as the moment the balance line pulls away from the contribution line for good.
Frequently asked questions
Why are there two different projected numbers?
Because a dollar in twenty years is not a dollar today. The headline is nominal — the number that will actually be on the statements. The today's-money figure divides it by inflation compounded over the horizon, so it is what that pile would buy at current prices. At the page's own defaults the projection is $2,119,159 nominal and $1,293,261 real: both are true, but only the second one is a standard of living. If you set inflation to 0 the two columns collapse into one, and you should then be entering a real, after-inflation return.
Does paying down a mortgage really build net worth?
Dollar for dollar, yes — and with certainty, which is the part that gets underrated. A dollar of principal repaid reduces what you owe by a dollar, and net worth is what you own less what you owe. That is why the principal field sits beside the saving field. Interest is deliberately excluded: it leaves the household and never appears on the balance sheet at all. Your loan statement splits every payment into the two, and the principal half is the figure that belongs here.
Why do other assets not grow?
Because there is no defensible rate to give them. Vehicles depreciate, private business equity is unknowable without a valuation, and household goods are not an asset class. A growth rate applied to that line would be the least honest number on the page, so it gets none and the line is held flat for the whole projection. If a genuinely appreciating asset is sitting in there, move it into the investment field where it earns a return.
What is the crossover year?
The year cumulative growth passes everything you have added since the projection started. At the page's defaults it lands in year 4, because $309,000 of existing net worth is compounding from day one while the contributions are only just arriving. Once you are past it, your saving is a shrinking share of a growing number — which is the argument for a long horizon rather than a heroic saving rate.
Should I include my house?
For a net worth figure, yes — at market value, with the mortgage subtracted on the other side. That is how every published measure counts it, including the Federal Reserve's. But watch what share of the finish it becomes: at the defaults, $725,711 of the $2,119,159 projection is home equity, which is 34% of a number you cannot spend without selling or borrowing. That gap between what you are worth and what you can reach is a separate page.
How accurate is a twenty-year projection?
As a central estimate, reasonable. As a forecast, not at all. One flat return applied every year ignores the order returns arrive in, and the same long-run average with a bad first decade lands somewhere quite different. Treat the headline as the middle of a range that is wide in both directions, and re-run it a percentage point either side of your return assumption to see how wide.
What happens after my loans are paid off?
The projection stops crediting the principal payments, because there is no balance left to retire — at the defaults there is still $110,000 outstanding after twenty years, but on a shorter mortgage the loans clear partway through. The money is still in your budget at that point; this page simply does not assume you redirect it into savings. If you would, add it to the annual-saving field and watch what the redirect is worth.