Early on, deposits dominate; later, rate and time do — how the three levers trade places across a life. Portfolio math has three loud inputs — how much you add, what it earns, and how long it runs — and their relative power flips with age and balance size. (1)
Portfolio math has three loud inputs — how much you add, what it earns, and how long it runs — and their relative power flips with age and balance size. No. Tool-Lifes pages are educational atlases. Decisions need your goals, constraints and, when appropriate, a licensed adviser.
Mark each measure High, Any or Low for what you want. The fit number moves with every mark, and your marks follow you to the next page in this app.
| Measure | Contributions vs rate vs time | Opportunity cost | You want |
|---|---|---|---|
| Time sensitivity | |||
| Rate sensitivity | |||
| Contribution leverage | |||
| Behaviour risk | |||
| Tax & fee drag | |||
| Horizon fit |
Mark at least one measure to see a fit number.
Scores are the atlas’s 0–100 teaching marks. They are not a live exchange rate or investment advice.
Tick a point once you could explain it in your own words. Ticks stay on this device.
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All points done. Next: Open the topic: Contributions vs rate vs time
Early on, deposits dominate; later, rate and time do — how the three levers trade places across a life. Portfolio math has three loud inputs — how much you add, what it earns, and how long it runs — and their relative power flips with age and balance size.
Portfolio math has three loud inputs — how much you add, what it earns, and how long it runs — and their relative power flips with age and balance size. No. Tool-Lifes pages are educational atlases. Decisions need your goals, constraints and, when appropriate, a licensed adviser.
Higher net rates help, but time and contributions often dominate — especially early. Costs and behaviour can erase a “good” rate. Treat outputs as scenario sketches. Vary contribution, rate, fees and inflation to see which lever moves your goal date.
From foundations, continue to contributions-vs-rate or fee-drag; for behaviour, open consistency-habit or panic-selling. What changed in the last century is access — index funds, payroll deduction and phone apps put long clocks in ordinary hands.
These figures describe codes, history, or a teaching calculator. They are not a live exchange rate or investment advice. They do not replace the full topic page.
Next question: Opportunity cost · Open the topic: Contributions vs rate vs time
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