Fund Performance Calculator

Track returns, gains, fee drag, and benchmarks. Visualize outcomes using clear metrics, comparisons, and charts. Estimate portfolio skill, efficiency, and resilience across market cycles.

Calculator Inputs

50 means average mid-period timing.
Higher weight means money left earlier.

Example Data Table

Scenario Beginning Value Contributions Withdrawals Distributions Ending Value Years Benchmark
Balanced Fund $10,000.00 $1,500.00 $500.00 $300.00 $12,850.00 3 8.00%
Growth Fund $25,000.00 $4,000.00 $0.00 $450.00 $34,900.00 4 10.00%
Income Fund $40,000.00 $2,000.00 $3,000.00 $1,200.00 $43,500.00 5 6.50%

Formula Used

Period Return (Modified Dietz)
Return = (Ending Value − Beginning Value − Net Cash Flow + Distributions) ÷ (Beginning Value + Weighted Cash Flow)
Weighted Cash Flow
Weighted Cash Flow = (Contributions × Contribution Weight) − (Withdrawals × Withdrawal Weight)
Annualized Gross Return
Annualized Return = (1 + Period Return)^(1 ÷ Years) − 1
Annualized Net Return
Net Return = ((1 + Annualized Gross Return) × (1 − Expense Ratio)) − 1
Real Return
Real Return = ((1 + Net Return) ÷ (1 + Inflation Rate)) − 1
Sharpe Ratio
Sharpe Ratio = (Net Return − Risk-Free Rate) ÷ Annual Volatility
Calmar Ratio
Calmar Ratio = Net Return ÷ Maximum Drawdown

This model estimates money-weighted performance when external cash flows occur during the measurement period. It is practical for portfolio reviews, client reporting, and benchmark comparisons.

How to Use This Calculator

  1. Enter the portfolio beginning value and ending value for the review period.
  2. Add total contributions, withdrawals, and reinvested distributions.
  3. Set contribution and withdrawal weights to reflect average timing.
  4. Enter the investment period in years.
  5. Provide expense ratio, inflation rate, tax rate, benchmark return, and risk assumptions.
  6. Click Calculate Performance to display the result summary above the form.
  7. Review the chart, detailed results, and risk metrics.
  8. Use the CSV and PDF buttons to export a shareable report.

FAQs

1) What does this calculator measure?

It estimates fund performance using capital values, cash flows, fees, taxes, inflation, and benchmark inputs. It also shows annualized return, real return, alpha, Sharpe ratio, Calmar ratio, and growth projections for a more complete portfolio review.

2) Why use Modified Dietz return?

Modified Dietz handles contributions and withdrawals without requiring every dated transaction. It is useful when cash flows happened during the period and you want a money-weighted performance estimate that is practical for reports and portfolio evaluations.

3) What are contribution and withdrawal weights?

These weights approximate when cash flows happened during the period. A 50% weight means average mid-period timing. Higher withdrawal weight means money left earlier, which reduces the capital base for return estimation more strongly.

4) Does the calculator include fees?

Yes. The expense ratio reduces the annualized gross return to estimate net annual return. This shows how ongoing fund costs can drag long-term performance, even when headline returns appear strong.

5) What is the real return result?

Real return adjusts the net annual return for inflation. It helps show whether purchasing power actually improved after rising costs. A positive nominal return can still become a weak real return in high-inflation periods.

6) How should I use the benchmark comparison?

Use the benchmark return to compare fund skill against a relevant market standard. Alpha shows the annualized gap. A fair comparison works best when the benchmark matches the fund’s style, risk level, and investment universe.

7) Are Sharpe and Calmar ratios enough for risk analysis?

They are helpful, but not complete. Sharpe focuses on return per unit of volatility, while Calmar relates return to drawdown. Investors should also review holdings, concentration, liquidity, correlation, and downside scenarios.

8) Can I use this for any fund type?

Yes, it can support mutual funds, ETFs, managed accounts, and model portfolios. Results are most useful when the inputs are accurate and the benchmark, tax rate, volatility, and drawdown assumptions reflect the actual strategy.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.