ROI Calculator United States

Return on investment, or ROI, tells you how much you got back on top of each dollar you invested. Enter the amount you started with and the amount you ended with, and this ROI calculator shows the total return in dollars and as a percentage. If you add how long you held the investment, it also works out an annualized rate you can compare with other investments.

How ROI is calculated

Subtract your initial investment from the final value to get the total return in dollars, then divide that return by the initial investment and multiply by 100. Turn $10,000 into $15,000 and you have a $5,000 total return, a 50% ROI. The percentage lets you compare investments of very different sizes: a $5,000 gain on a $10,000 stake is a 50% return, while the same gain on a $100,000 stake is 5%.

Why the holding period matters

A 50% ROI earned in one year and the same ROI earned over ten are very different results. The annualized return finds the single yearly rate that, compounded year after year, would grow your initial investment into the final value. It takes the ratio of final value to initial investment, raises it to the power of one divided by the number of years, subtracts one, and converts to a percentage. A 50% total ROI earned over three years is about 14.5% a year, respectable but a long way from 50%. Use the annualized figure to compare a quick sale with a long hold.

Small differences in the annualized rate add up over long periods. An investment compounding at 10% a year doubles in a little over seven years; one at 7% takes more than ten. Over a working lifetime that gap can decide whether retirement is comfortable or strained, which is why experienced investors watch the annualized figure more than the total return.

A worked example

Say you invested $10,000 in a fund and sold three years later for $15,000. The total return is 15,000 minus 10,000, or $5,000. Dividing 5,000 by 10,000 gives a simple ROI of 50%. To annualize, divide 15,000 by 10,000 to get 1.5, raise it to the power of one-third, and you get roughly 1.1447, an annualized return of about 14.47% per year. That is the figure to quote when comparing this fund with a savings account or a different stock you could have bought.

Reading the result

Judge an ROI against the risk you took and the time it took to earn. A 20% ROI from a volatile single stock is not the same as 20% from a diversified index fund. Compare across time frames with the annualized return, and weigh it against a realistic alternative; the roughly 10% long-run average of the broad US stock market is a useful yardstick. A positive ROI means you ended with more than you started, which on its own does not tell you whether it was a good use of your money.

ROI outside the stock market

The same formula measures the return on a rental property, a business project, a marketing campaign, an education or a home renovation, anywhere you can put a dollar figure on what went in and what came out. For a rental, the initial investment should include the down payment, closing costs and repairs, and the final value should be net of selling costs and taxes. For a course or certification, the return might be the extra lifetime earnings it brings against the tuition and time it cost. Measuring each choice the same way lets you compare opportunities that are otherwise hard to line up.

Common mistakes

Ignoring fees and taxes can turn an impressive headline gain into a mediocre one, so enter net figures. Comparing a simple ROI over one period with an annualized rate over another gives a misleading answer; compare like with like. And a past ROI is not a forecast. It records what happened and says nothing certain about what a similar investment will do next.

Assumptions and limitations

The calculator treats your investment as a single lump sum in and a single amount out, so it does not model ongoing contributions, partial withdrawals, or dividends and interest reinvested along the way. The figures are nominal and ignore inflation; to see your real return, subtract average inflation over the period from the annualized rate. Fold purchase fees and commissions into the initial investment, and use the after-tax, after-cost proceeds as the final value.

About This ROI Calculator

Use this ROI calculator to get an instant estimate based on the figures you enter. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.