How the numbers are made.
No black box. LifeFlow runs on one deterministic engine — the same math powers your dashboard, the allocator, the retirement page, and our free calculators. Here’s exactly what it computes, what it assumes, and why every figure is an estimate, not a promise.
Your projection, year by year
You tell LifeFlow what you have, owe, earn, and want. From that, the engine builds a 30-year, year-by-year net-worth curve — how your wealth is likely to grow if you keep going as you are. Alongside it, it draws a “if you change nothing” baseline, so when you adjust a goal or an allocation you can see the difference against staying the course.
It also amortizes your debts (payoff dates, remaining interest, and what happens when a freed-up payment gets redirected), funds your goals along a timeline, and marks the moments that matter on the chart — a debt paid off, a goal reached, a big future expense landing.
Your freedom year, and the 4% rule
Your freedom year is the year work becomes optional — when your investable assets reach 25× your expected annual spending in retirement. That multiple comes from the 4% rule: the widely-used rule of thumb that you can withdraw about 4% of an invested portfolio a year (and 1 ÷ 0.04 = 25). We ask for your retirement spending because it’s usually not today’s spending — a paid-off mortgage lowers it, healthcare raises it; if you haven’t set it, we use today’s spending as a clearly-labeled stand-in. It’s a starting point, not a guarantee — but it’s a clear, honest target you can watch yourself move toward.
This is your center line — what steady markets would give you. Real ones rise and dip, so treat it as the middle of what’s likely, not a guarantee. Update your numbers any time and watch it move with your real life.
Why investable assets aren’t your net worth
This distinction is core to LifeFlow’s honesty. Your home is real wealth — but you can’t spend it in retirement without selling it. The same is true of a 529, which is earmarked for tuition, not your own future. So the freedom calculation counts only your investable assets — the money that can actually pay your bills once work stops — while your full net worth still reflects everything you own.
That’s why we show them side by side, and tell you a home is real wealth beforewe tell you it isn’t freedom. Both numbers are true; they just answer different questions.
The assumptions we make
A projection is only as honest as its assumptions, so here are ours:
Every figure is in today’s dollars — after inflation. A number 20 or 30 years out is shown in money you can actually feel now, not an inflated future figure that looks bigger than it spends. So the growth rates below are real(after-inflation) returns, and your freedom target doesn’t balloon with inflation either — both sides of the comparison stay in the same money. And we deliberately lean conservative: it is far safer to be a little too cautious than to tell someone work is optional a decade too soon.
- Returns are steady, real averages. The engine grows each asset at a sensible default for its category — roughly 5% a year for stocks and retirement accounts, ~1% for a home, ~0.5% for cash — all real(after-inflation) rates. You can override the rate per asset if you want to; most people leave the category default. Real markets don’t move in a straight line — some years are up, some down — so treat the curve as a smooth average, not a forecast of any single year.
- Income is what you actually take home. You enter after-tax, take-home pay, so your cash flow reflects money you can really use.
- Money you don’t assign has to go somewhere.For cash flow you don’t allocate, you choose how the projection treats it — spent, saved (at ~0.5%), or invested (at ~5%) — again, real, after-inflation rates.
- Your inputs drive everything. Better inputs, better estimate. If your expenses or returns change, update them and the whole picture responds.
Every number is an estimate — not financial advice
LifeFlow is an informational and planning tool. It is not financial, investment, tax, or legal advice, and we are not your financial advisor or fiduciary. Every projection is an illustrative estimate based on the information you enter and on simplified assumptions — your actual results will differ. Use LifeFlow as a starting point for your own thinking, and consult a qualified professional before making decisions about your money.
Want the details in the language of terms and privacy? Read our Terms of Service and Security & Privacy page. Curious to feel it? The free calculators run this exact math, no signup needed.
See the life your money can buy.
Enter what you have, owe, earn, and want — no bank linking, ever. LifeFlow shows your freedom year, the goals and the life you want now, and how every dollar moves your future.
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