Portfolio Performance Calculator
Calculate portfolio returns and benchmarking.
Step-by-Step Solution
About Portfolio Performance Calculator
Calculate portfolio returns and benchmarking. This calculator provides instant results with step-by-step explanations to help you understand the calculation process.
How to use this calculator
- Enter your starting portfolio value and ending portfolio value.
- Add any income received during the period, such as dividends or interest.
- Choose the benchmark you want to compare against and enter its return or values.
- Review the calculator's step-by-step breakdown to see both total return and benchmark comparison.
The formula explained
$$ \text{return} = \frac{\text{ending value} - \text{starting value} + \text{income}}{\text{starting value}} \times 100\%, \quad \text{benchmark outperformance} = \text{portfolio return} - \text{benchmark return} $$
- \(\text{return}\) = the percentage gain or loss over the period
- \(\text{ending value}\) = portfolio value at the end of the period
- \(\text{starting value}\) = portfolio value at the beginning of the period
- \(\text{income}\) = cash paid out during the period, such as dividends or interest
- \(\text{benchmark return}\) = the return of the market index or comparison asset
- \(\text{portfolio return}\) = the calculated return for your portfolio
Step by step method
- Identify the beginning value of the portfolio and the ending value for the same period.
- Include any cash income received during the period so the return reflects total performance.
- Compute the portfolio return using the gain or loss relative to the starting value.
- Compare that result with the benchmark return to see whether the portfolio outperformed or underperformed.
Worked example
Suppose you invested in a portfolio and want to compare its performance with a market benchmark over one year.
- Start with a portfolio value of \(\$10,000\) and an ending value of \(\$10,800\). You also received \(\$200\) in dividends.
- Compute total return: \(\frac{10,800 - 10,000 + 200}{10,000} \times 100\% = \frac{1,000}{10,000} \times 100\% = 10\%\).
- If the benchmark return for the same period was \(8\%\), then the portfolio beat the benchmark by \(2\%\).
Answer. Portfolio return: 10 percent. Benchmark outperformance: 2 percent.
Tips and common mistakes
- Use the same time period for both the portfolio and the benchmark.
- Include dividends, interest, or other income if you want total return, not just price change.
- Be consistent about whether you are using dollar values or percentages throughout the calculation.
- Do not compare returns from different date ranges, because that can make the benchmark comparison misleading.
Frequently asked questions
What is the difference between portfolio return and price return?+
Portfolio return measures the full change in value and can include income such as dividends or interest. Price return only looks at the change in the asset price itself. If your portfolio earns income, total return is usually the better measure for performance.
Why do I need a benchmark?+
A benchmark gives you a reference point for judging performance. It helps you see whether your portfolio did better or worse than a market index or other comparison. Without a benchmark, it is harder to tell if a return was strong or weak.
Can I use this tool for a single stock?+
Yes, if you treat the stock like a one asset portfolio. Enter the purchase value, ending value, and any income it paid out. The same return and benchmark comparison logic still applies.
What should I do if my portfolio had deposits or withdrawals?+
You should adjust for cash flows so the return reflects investment performance rather than money added or removed. If the tool offers a step-by-step method, use the version that accounts for contributions and withdrawals. That gives a more accurate comparison to the benchmark.
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