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A household choice

Present bias as of 1

For custom tax or mortgage interactions. Restore the last inputs for Present bias: “Future value (annuity-ish savings)” and 1 in one session. Practice is boring on purpose — boredom is often what lets compounding finish its work.

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. Always ask whether a figure is nominal or real. A high nominal path can still lose purchasing power.

No. Illustrations use round teaching numbers. Markets, inflation and taxes change. In the net rate that compounds. Expense ratios, advice charges and spreads all reduce terminal wealth. From foundations, continue to contributions-vs-rate or fee-drag; for behaviour, open consistency-habit or panic-selling.

This atlas page keeps the focus on mechanisms you can reason about: rates, time, contributions, costs and behaviour — not stock tips or promised yields. Separate contributions, growth, fees, taxes and withdrawals. Mixing them hides which lever actually moved. Money without a date is storytelling. Compounding and discounting both need a clock.

Keep the name, the year, and 1. “Future value (annuity-ish savings)” is why those three stay. Restore the last inputs for Present bias: “Future value (annuity-ish savings)” and 1 in one session. 11

Figures to keep

Year of the rule
1
Figure in the sum
1
Item
Present bias
Reason kept
Future value (annuity-ish savings)

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