XIRR vs CAGR: Which is the Better Tool to Evaluate Returns in Mutual Funds?

Investing in mutual funds requires a thorough understanding of the tools used to evaluate returns. Two common metrics for assessing mutual fund performance are XIRR and CAGR (Compound Annual Growth Rate). While both metrics provide valuable insights, they serve different purposes and are suitable for various types of investments. This article compares XIRR in mutual funds and CAGR and discusses which tool is better for evaluating returns, as favoured by top fund managers.

What is CAGR?

CAGR, or Compound Annual Growth Rate, represents the mean annual growth rate of an investment over a specified period longer than one year. It calculates the annualised rate of return, smoothing out the effects of market volatility.

CAGR is often used to compare the historical performance of different investments or funds over the same period. However, it assumes uniform annual growth and is not suitable for investments with multiple cash flows, such as SIPs.

What is XIRR in mutual funds?

XIRR in mutual funds is an advanced method that calculates the internal rate of return for investments involving irregular cash flows. It is especially beneficial for calculating the returns on SIPs (Systematic Investment Plans) or investments made at different times. Unlike CAGR, which only considers a single lump-sum investment, XIRR takes into account each individual cash flow and its timing. Due to its complexity, XIRR is usually calculated using financial software or spreadsheet tools.

Key differences between XIRR and CAGR

Understanding the differences between XIRR and CAGR is crucial for selecting the right tool to evaluate mutual fund returns. Here’s a comparison:

Feature	CAGR	XIRR
Use case	Single investment with fixed duration	Investments with multiple cash flows
Calculation	Simple and straightforward	Complex, requires software
Assumptions	Assumes uniform growth	Takes into account varying cash flows
Suitability	Ideal for lump-sum investments	Best for SIPs and staggered investments

When to use CAGR

CAGR is ideal for measuring the performance of investments with a fixed starting and ending value. It is particularly suitable for:

• Comparing mutual fund performances: If you want to compare the growth of different mutual funds over the same period, CAGR provides a straightforward metric.
• Long-term investments: For investments held without any additional inflows or outflows, CAGR offers a clear picture of the annualised growth rate.
• Simplicity: Since CAGR does not consider periodic cash flows, it is easier to calculate and understand.

However, CAGR is not suitable for evaluating returns from SIPs or other investments with multiple cash flows, as it does not account for the timing of these flows.

When to use XIRR in mutual funds

XIRR is more effective for investments that involve multiple cash flows over time. Top fund managers often recommend XIRR as a tool for evaluating SIPs and investments where cash is added or withdrawn at irregular intervals. The benefits of using XIRR include:

• Accurate reflection of returns: XIRR considers each cash flow and the date it was made, providing a precise internal rate of return.
• Relevance for SIPs: Many mutual fund investors use SIPs, where they contribute fixed amounts at regular intervals. XIRR accurately measures the returns on these investments by considering each instalment.
• Flexibility: Unlike CAGR, which only works for set time periods, XIRR can be applied to investments held for any duration, regardless of the timing of cash flows.

Advantages of using XIRR in mutual funds

Top fund managers prefer using XIRR to measure the actual returns on SIPs and other investments involving varying cash flows. The reasons for this preference include:

• Precision: XIRR provides a precise calculation by taking into account the timing and size of each cash flow, giving a more accurate representation of an investor’s returns.
• Real-life application: Investors often invest or withdraw funds at different intervals. XIRR reflects these movements and provides a realistic view of the returns.
• Versatility: XIRR can be applied to any investment duration and is not limited by a fixed time frame, making it a versatile tool for both short- and long-term evaluations.

Which is better: CAGR or XIRR in mutual funds?

The choice between CAGR and XIRR depends on the type of investment you are assessing. For lump-sum investments with a fixed start and end date, CAGR is the simpler and more suitable tool. It offers a clear, annualised growth rate that is easy to compare across different funds.

However, for investments involving multiple cash flows, such as SIPs or investments with staggered inflows and outflows, XIRR in mutual funds is the preferred tool. Top fund managers favour XIRR because it provides a comprehensive view of an investment’s actual performance by considering the timing and amount of each cash flow.

Best practices for using XIRR in mutual funds

If you decide to use XIRR in mutual funds to evaluate your returns, keep these best practices in mind:

• Use financial software: Calculating XIRR manually can be complex. Use spreadsheet tools like Microsoft Excel or Google Sheets, which have built-in functions to calculate XIRR.
• Keep track of cash flows: Ensure that all cash inflows and outflows, including investment instalments and withdrawals, are accurately recorded with their respective dates.
• Compare with CAGR for a balanced view: While XIRR is more accurate for SIPs, comparing it with CAGR can provide additional insights when assessing long-term performance.

Conclusion

Both CAGR and XIRR are valuable tools for evaluating mutual fund returns, but they serve different purposes. CAGR is perfect for straightforward, lump-sum investments with fixed durations, while XIRR in mutual funds is essential for investments involving multiple cash flows, such as SIPs. Top fund managers often use XIRR to assess the true performance of mutual funds, making it an indispensable tool for investors looking for a realistic and detailed understanding of their returns. By choosing the right metric for your investment type, you can gain a better perspective on your financial performance and make informed decisions for your future investments.