What Is Investment Return?
Investment return describes how the value of an investment changed over a period. A basic calculation can show the gain or loss and express it as a percentage of the starting amount.
Calculate Investment Gain
A positive result is a gain; a negative result is a loss.
Calculate Total Return Percentage
For example, if an investment rises from 8,000 to 9,200, the gain is 1,200 and the simple total return is 15%.
Why the Holding Period Matters
A 15% total return over one year is not equivalent to a 15% total return over ten years. Time must be included when comparing investments or periods.
Annualized Return
For a single initial investment with no interim cash flows, an annualized growth rate can be represented by the compound annual growth rate: CAGR = (Ending Value ÷ Starting Value)1/t − 1, where t is the number of years. When deposits or withdrawals occur during the period, cash-flow timing matters and a simple CAGR may not accurately describe the investor's experience.
Contributions, Withdrawals and Dividends
If money was added, withdrawn or distributed during the measurement period, compare returns using a method that accounts for those cash flows. The basic beginning-to-ending percentage can otherwise be misleading.
Return Is Not the Same as Profit After Costs
Fees, taxes, transaction costs and other expenses can reduce the amount an investor actually keeps. When comparing real investments, use the relevant net-of-cost information when available.
Use the Tervilo Investment Return Calculator
Use the Investment Return Calculator for a quick scenario calculation, then review the assumptions before interpreting the result.
Total Return vs Annualized Return
Total return describes the change across the complete measurement period. Annualized return puts that change into a yearly growth-rate framework, which makes periods of different lengths easier to compare.
CAGR Formula
Here t is the number of years. CAGR is most appropriate for a single starting investment with no interim cash flows. It is not a complete description of an investment with irregular deposits or withdrawals.
Dividends and Distributions
Decide whether the ending value includes dividends or other distributions before comparing returns. A price-only change can differ from a total-return calculation that includes distributed income.
Fees and Taxes
A mathematical return calculation does not automatically represent the amount an investor keeps. Management fees, transaction costs and taxes can reduce the realized result.
Worked Comparison
An investment that grows from 10,000 to 12,000 has a 20% total return before considering cash flows and costs. The annualized result depends on how long that growth took. The same 20% total return over one year and five years should not be interpreted as equivalent performance.
Use the Tervilo Investment Return Calculator
Use the Tervilo Investment Return Calculator to calculate scenario returns, then review the period and cash-flow assumptions before comparing results.
Choosing the Right Investment Return Measure
Different return measures answer different questions. A simple percentage return can describe the change between an initial and final value, while an annualized return is more useful when comparing investments held for different periods.
Return With Regular Contributions
When money is added or withdrawn during the investment period, the beginning and ending balances alone may not describe the investor experience accurately. The timing and size of each contribution can materially affect the result. A calculator that supports regular contributions is therefore more appropriate for recurring investment plans.
Nominal Return vs Real Return
A nominal return describes the investment result before adjusting for inflation. A real return attempts to show the change in purchasing power after considering inflation. These measures should not be treated as interchangeable.
Fees and Taxes
Published investment returns may differ from the return actually received because management fees, transaction costs and taxes can reduce the final amount. When comparing investments, use consistent assumptions and check whether the quoted return is before or after these costs.
Investment Return Is an Estimate
A calculator projects results from the assumptions entered by the user. It does not predict future market performance. Actual returns can vary substantially from an assumed rate, particularly over shorter periods or for volatile investments.