How growth compounds, and how it is measured
Why does the last decade of an investment contribute more than the first two, and which growth number should you believe?
6 steps · Foundations
The path
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How compounding actually works
The arithmetic behind every projection on this site, and why starting earlier beats investing more.
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Compound Interest Calculator
Change the compounding frequency and watch how little it matters next to time. That surprises most people.
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CAGR, XIRR, and which one your returns actually need
Two ways to state the same growth, and the situation where one of them is simply wrong.
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CAGR Calculator
One investment, one start, one end: the simple case, so the harder one has something to sit against.
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XIRR Calculator
Money going in and out on different dates — what a real portfolio looks like.
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After this one
Deposits: the safe end of the shelf
What do an FD and an RD actually pay, and what is the part nobody mentions?