Compounding, explained mechanically.
Everything below is general education about how compound growth works as a mechanism. None of it is personalised advice, none of it recommends any specific investment, and none of it is for sale.
Informational purposes only, not investment advice. These guides describe general mechanics and terminology. They are not a recommendation to buy, hold or sell any security, and do not account for your personal circumstances, risk tolerance or jurisdiction. Investing involves risk, including the possible loss of principal, and any illustrative figures are simplified examples, not projections. For decisions that affect your finances, consult a qualified, licensed advisor.
Six mechanics worth understanding first.
What compounding actually means
A general explanation of how returns generating further returns differs from simple, non-compounding growth.
Why time matters most
How the same rate of return produces very different outcomes over different time horizons, and why that happens mathematically.
How fees compound too
Why small differences in ongoing costs can compound into meaningfully different outcomes over long periods.
The rule of 72
A simple mental shortcut for estimating how long growth at a given rate takes to double, and its limitations.
Compounding isn't guaranteed
Why compounding describes a mechanism, not a promise — returns can be negative, and the mechanism works in both directions.
Risks worth understanding
Market risk, sequence of returns, and why illustrative compounding examples are not forecasts.
Six terms worth knowing before anything else.
- Compound growth — growth calculated on both the original amount and previously accumulated growth.
- Simple growth — growth calculated only on the original amount, not on accumulated gains.
- Time horizon — how long money is set aside before it is likely to be needed.
- Expense ratio — an ongoing cost that compounds against returns over time.
- Rule of 72 — a rough shortcut estimating years to double an amount at a given growth rate.
- Sequence of returns — how the order in which gains and losses occur can affect long-term outcomes.
What this Learning Hub is — and isn't.
It is
A free, general reference explaining how compounding mechanics work, written to be understood without prior background.
It isn't
Investment advice, a recommendation of any security or provider, a performance forecast, or a paid service of any kind.