ROI vs CAGR: What's the Difference?

May 2025 5 min read Investing & ROI

ROI and CAGR are two of the most commonly used metrics in investing — and they're often confused. Both measure investment performance, but they answer different questions and are useful in different situations.

Quick answer: ROI tells you total return over any period. CAGR tells you the annualized equivalent — what your investment returned per year on average. CAGR is more useful for comparing investments held for different lengths of time.

What is ROI?

Return on Investment (ROI) measures the total profit relative to the initial investment, expressed as a percentage. It doesn't account for time — a 100% ROI could represent a 1-year return or a 20-year return.

ROI = ((Final Value - Initial Value) / Initial Value) × 100

What is CAGR?

Compound Annual Growth Rate (CAGR) smooths out returns over multiple years to show what the investment would have returned per year if it grew at a steady rate. It accounts for the effect of compounding.

CAGR = (Final Value / Initial Value)^(1/Years) - 1

Side-by-Side Comparison

ROI

Total return over the full period. Good for knowing how much you made overall. Doesn't account for time or compounding.

CAGR

Annualized equivalent return. Good for comparing investments of different lengths. Assumes smooth compounding growth.

Same investment — ROI vs CAGR

Initial investment$10,000

Final value after 10 years$25,000

ROI150%

CAGR9.6% per year

150% ROI sounds impressive on its own. But 9.6% CAGR puts it in context — it's roughly in line with the historical stock market average.

When to Use ROI

Use ROI when you want to know the total profit from a specific investment without caring about the time period. It's useful for comparing two investments held for the same length of time, or for evaluating a one-time transaction like a property flip.

When to Use CAGR

Use CAGR when comparing investments held for different periods. If Investment A returned 80% over 5 years and Investment B returned 120% over 10 years, CAGR tells you which performed better annually: A at 12.5% vs B at 8.3% — A wins despite the lower total ROI.

The Limitation of CAGR

CAGR assumes smooth, consistent growth every year. In reality, investments fluctuate. A stock that dropped 40% one year and gained 70% the next has a respectable CAGR — but the volatility would have been stressful. CAGR masks year-to-year variation.

Calculate both ROI and CAGR

Our ROI calculator automatically shows both your total return and annualized CAGR for any investment.

Try the ROI Calculator

Frequently Asked Questions

Is CAGR the same as average annual return?

No. Average annual return is a simple average of yearly returns. CAGR is the geometric mean — it accounts for compounding. CAGR is almost always lower than the simple average when returns vary year to year.

Which is better to use when evaluating a mutual fund?

CAGR is the standard metric for evaluating funds over 3, 5, and 10-year periods. It's the number reported in fund prospectuses and financial websites, making it easy to compare funds directly.

Can CAGR be negative?

Yes. If your final value is less than your initial investment, CAGR will be negative, indicating an annualized loss. This is common in markets that declined over a specific period.