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Investment Return Calculator

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.

Updated 2026-07-09Reviewed by US Finance Hub Editorial TeamCalculations run in your browser

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.

Calculator

Enter your numbers

Amount invested at the beginning.
Total added during the period.
Portfolio value at the end.
Length of the measurement period.

How to use this calculator

  1. Enter the initial investment.
  2. Add total contributions made during the period.
  3. Enter the ending portfolio value and number of years.
  4. 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 this calculator to compare realistic scenarios before making a financial decision, and update the inputs when rates, costs, income, or goals change.

Limitations

  • The result is an estimate based only on the inputs and assumptions shown.
  • It does not evaluate eligibility, product terms, market conditions, or personal legal and tax circumstances.
  • Actual outcomes can differ because of fees, timing, rounding, taxes, and provider-specific methods.

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.

Gain = Ending value − Initial investment − Contributions; Annualized return ≈ (Ending ÷ Invested capital)^(1/years) − 1

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.

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.

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Sources and editorial review

Educational estimates only; not personalized financial, tax, legal, lending, investment, or insurance advice.