How the numbers are made.

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 a multiple of 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). 25× is the figure for a 30-year plan — the length the rule was built for — and LifeFlow moves it with your own plan length rather than holding it fixed. The 25× is one point on a curve, not a floor: LifeFlow moves the multiple with your plan’s length in both directions. A plan longer than 30 years draws at a gentler rate, easing from 4% toward 3.5%, so the target rises from 25× to 28.6× at 45 years. A plan of 20 years or less draws at 5.1%, so the target falls to 19.6×(multiples rounded to one decimal). 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 what steady markets would give you. Real ones rise and dip, so treat it as an estimate, 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 before we 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. Growth and withdrawals are both set from published research, and both are stated here: assets compound at 5% real — below the ~6.5–7% real return US equities returned historically, and above the 3.2% real Fidelity forecasts for US stocks over the 20 years to 2044. The withdrawal rate follows how long the plan runs: 5.1% a year for a plan of 20 years or less, 4% at exactly 30 years, and 3.5% from 45 years on. 5.1% is the top of our own range and 3.5% the bottom. Those rates come from research on portfolios held 50–75% in stocks; LifeFlow never asks how yours is allocated, so it applies them without checking that condition. Try 3.5% or 3% in the calculator.

• 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.

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