Return on investment (ROI) is the first number most people reach for, but on its own it can be misleading. A 50% total return sounds great — until you learn it took fifteen years to earn. Time is the missing ingredient, and that is what annualized return adds.
Simple ROI
ROI is just gain divided by cost. Turn $10,000 into $15,000 and your ROI is 50%. It is easy and useful for a quick snapshot, but it says nothing about how long the money was tied up, so you cannot compare two investments of different durations with it.
Annualized (compound) return
Annualized return, or CAGR, answers “what steady yearly rate would have produced this result?” That same 50% gain over 3 years is about 14.5% per year — excellent. Over 15 years it is about 2.7% per year — worse than a savings account. Same ROI, opposite verdict.
When to use each
Use total ROI to describe a single completed deal. Use annualized return to compare opportunities with different time horizons, since it puts everything on a per-year footing. Professionals almost always quote annualized figures for exactly this reason.
Frequently asked questions
What is a good annualized return?
Historically, broad stock markets have returned roughly 7–10% per year on average over long periods, before inflation.
Does ROI include fees and taxes?
Only if you subtract them. A “net” ROI after costs is the honest one to compare.
Try it yourself
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Results are general information only and not professional financial, medical, or legal advice.