Return on investment (ROI) measures how much you gained or lost relative to what you put in. It is the most common way to compare the profitability of very different investments — a stock, a rental property, a marketing campaign, or a small business — on a single, apples-to-apples percentage. This calculator shows both your total ROI and your annualized return so short and long holding periods can be compared fairly.
Total ROI vs. annualized return
Total ROI is simply your net profit divided by your initial cost, expressed as a percentage. It answers "how much did this grow overall?" But a 50% total return means something very different over one year than over ten. That is why annualized return — the compound annual growth rate, or CAGR — matters: it converts your total gain into the equivalent steady yearly rate, letting you compare investments held for different lengths of time.
A worked example
You invest $10,000 and sell five years later for $16,000. Your net profit is $6,000, so your total ROI is 60%. That sounds impressive, but spread across five years the annualized return is about 9.9% per year. Compare that to a different investment that returned 40% total in just two years — a lower total ROI, but an annualized return near 18.3%, making it the stronger performer per year. Without annualizing, you would have picked the wrong one.
What ROI leaves out
ROI is powerful but incomplete. It ignores risk — a volatile investment and a stable one can show the same ROI while being very different bets. It also ignores the timing of cash flows and, unless you account for it, the effect of inflation and taxes on your real return. Use ROI as a first-pass comparison, then layer in risk and tax considerations before committing.
Using ROI wisely
- Always include every cost — fees, commissions, maintenance, and taxes — in your initial investment figure for an honest number.
- Use annualized return, not total ROI, when comparing investments held for different periods.
- Compare your annualized return against a benchmark like the long-run stock market average (roughly 7–10% before inflation) to judge whether it was worth the risk.
- Remember that past ROI never guarantees future results.
- For investments with ongoing income (rent, dividends), add that income to your final value to capture the full return.