IIMoney, Investing & the Economychecked 92 days ago14 min read
Compound Interest: The Maths of Time (and of Debt)
You'll walk away with
A modelled scenario in a spreadsheet: the same money as savings and as debt, on one chart
Worth knowingℹ️ This is education, not financial advice. The maths is exact; the returns and rates used are illustrative, not predictions. Real investment returns vary and can be negative.
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- 01The most important idea in personal finance, and it's one line
- 02Why this deserves a whole lesson
- 03Mechanism 1 — Simple vs compound
- 04Mechanism 2 — Time matters more than amount
- 05Mechanism 3 — The Rule of 72
- 06Mechanism 4 — The same force, in reverse: debt
- 07What this means for you
- 08Try it: build the two curves (40 min)
- ✓Check yourself — the quiz
- ▶The video and audio versions
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A modelled scenario in a spreadsheet: the same money as savings and as debt, on one chart
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