Investment Return Calculator: Total and Annualised Return
An investment return calculator compares what you invested with the ending value. It separates added contributions from investment gain and provides a simplified annualized return estimate.
Quick answer
Investment gain is the ending value minus the starting amount and later contributions. An annualized percentage makes periods easier to compare, but cash-flow timing affects the true personal return.
At a glance
- What it calculates
- Measure total gain, contribution-adjusted return, and annualized growth from an investment.
- Who it is for
- US investors comparing contribution levels and assumed returns over a multi-year horizon.
- Coverage
- United States (federal rules; state and local rules vary)
- Data and assumptions
- A constant annual return compounded annually, contributions at period end, and no taxes, fees or withdrawals.
- Cost
- Free, no signup, calculations run in your browser
- Last reviewed
- 2026-07-09
Calculator
How to use this calculator
- Enter the initial investment.
- Add total contributions made during the period.
- Enter the ending portfolio value and number of years.
- Review gain, total return, and the simplified annualized estimate.
Explanation
What it is
An investment return calculator compares what you invested with the ending value. It separates added contributions from investment gain and provides a simplified annualized return estimate.
How it works
Total gain equals ending value minus the initial investment and contributions. The simplified annualized return treats net invested capital as the base; it is not a precise internal rate of return when contributions occur throughout the period.
When to use it
Use it when comparing contribution levels or time horizons, or converting a total gain into an annualised rate.
Limitations
- One constant annual return is applied; actual sequence of returns changes the outcome.
- Fund fees, trading costs and taxes are not deducted.
- Inflation is not applied, so results are in nominal dollars.
Key terms
- Investment gain
- Ending value minus amounts contributed.
- Total return
- Gain as a percentage of invested capital.
- Annualized return
- A yearly rate intended to summarize multi-year growth.
- Contribution
- New money added during the period.
- Internal rate of return
- A return measure that accounts for the exact timing of cash flows.
Formula
Total gain equals ending value minus the initial investment and contributions. The simplified annualized return treats net invested capital as the base; it is not a precise internal rate of return when contributions occur throughout the period.
Worked example
If total invested capital is $50,000 and the ending value is $65,000 after five years, the calculator shows the dollar gain, total return, and a simplified annualized return.
FAQ
What is a good investment return?
A good return depends on risk, time period, inflation, fees, taxes, and the benchmark. A high return is not automatically good if it required excessive risk.
How do contributions affect return calculations?
Contributions increase account value but are not investment profit. To measure performance accurately, separate new money from market gains and account for timing.
Is annualized return the same as average return?
No. Annualized return reflects compounding. A simple arithmetic average can overstate the growth actually experienced over multiple periods.
Does this calculator include dividends?
Dividends are included only if they are reflected in the ending value or cash received. Reinvested dividends are normally part of total return.
How should I compare my return with a benchmark?
Use a benchmark with a similar asset mix and compare over the same dates, after relevant fees. A stock index is not an appropriate benchmark for every portfolio.
Why can my personal return differ from the fund return?
Your deposits and withdrawals occur at specific times. The fund return assumes a fixed investment, while your dollar-weighted experience depends on cash-flow timing.
What is a good annual return on investment?
There is no single answer, but a diversified US equity portfolio has historically returned roughly 7% to 10% a year before inflation over long periods. Compare any projected return against a relevant index rather than in isolation.
What is the difference between total return and annualised return?
Total return is the whole percentage gain over the holding period. Annualised return converts that gain into an equivalent yearly compound rate, which is the only fair way to compare investments held for different lengths of time.
Common mistakes
- Ignoring cash-flow timing.
- Comparing returns calculated with different methods.
- Excluding fees and taxes.
- Assuming past performance will continue.
Tips
- Use cash-flow-aware performance reports when available.
- Compare after-fee returns.
- Use an appropriate benchmark.
- Separate market gains from new contributions.
Sources and editorial review
Educational estimates only; not personalized financial, tax, legal, lending, investment, or insurance advice.