Annualised Rate of Return: How Australians Can Compare Investments in 2026

The annualised rate of return (ARR), sometimes called the compound annual growth rate (CAGR), measures the average yearly return an investment has delivered over a set period, taking compounding into account. Unlike a simple return, which just totals up your gains or losses, ARR smooths out the ups and downs to show what your investment would have earned if it had grown at a steady rate each year.

ARR vs. Simple Return

• Simple Return: Adds up your total gain or loss over the period, without considering how long you held the investment or the effect of compounding.
• Annualised Rate of Return: Shows the average yearly growth, factoring in compounding, so you can compare investments held for different lengths of time.

Why Use ARR?

ARR is especially useful when you want to compare investments with different timeframes. For example, you might want to weigh up a three-year term deposit against a five-year share portfolio. ARR lets you see which one delivered a better average annual result, regardless of the total period.

In 2026, Australian investors are navigating a landscape shaped by changing interest rates, evolving superannuation rules, and ongoing economic uncertainty. With borrowing costs remaining elevated and living expenses in focus, it’s more important than ever to assess how your investments are performing over time.

Comparing investments based on total returns alone can be misleading. For instance, if one investment returned 30% over three years and another returned 50% over five years, it’s not immediately clear which performed better on an annual basis. ARR helps you cut through the confusion.

Example: Comparing Two Investments

Suppose you’re looking at two options:

• A managed fund that returned 30% over 3 years.
• An ETF that returned 50% over 5 years.

To compare them fairly, you calculate the ARR for each:

• Managed Fund ARR:
  • ARR = [(1 + 0.30)^(1/3)] - 1 ≈ 9.1% per year
• ETF ARR:
  • ARR = [(1 + 0.50)^(1/5)] - 1 ≈ 8.4% per year

Despite the ETF’s higher total return, the managed fund delivered a stronger average annual result.

The formula for ARR is straightforward:

ARR = [(Ending Value / Beginning Value) ^ (1 / Number of Years)] - 1

This formula applies whether you’re looking at shares, property, or your super fund’s performance. Here’s how to use it:

1. Find your starting and ending investment values.
2. Divide the ending value by the beginning value.
3. Raise the result to the power of (1 divided by the number of years).
4. Subtract 1, then convert to a percentage.

Worked Example

Imagine you invested $10,000 in 2020 and it’s now worth $14,000 in 2026:

ARR = [($14,000 / $10,000) ^ (1/6)] - 1
ARR = (1.4 ^ 0.1667) - 1 ≈ 5.8% per year

This means your investment grew by about 5.8% per year, compounded, over six years.

In 2026, many Australians are rethinking their investment strategies due to higher living costs, changes in superannuation, and shifts in the property market. The ARR can help you:

Compare Across Asset Classes

Whether you’re looking at shares, property, cash, or alternatives, ARR puts everything on the same footing. This makes it easier to see which investments have delivered stronger average annual growth.

Assess Superannuation Performance

Superannuation funds often report annualised returns to help members understand long-term performance. Comparing the ARR of different funds can help you decide if your super is on track or if it’s time to consider other options.

Benchmark Property Investments

If you own property, calculating the ARR on your investment can help you compare it to other opportunities, such as shares or managed funds. This is especially useful in a market where property values may be rising slowly or experiencing periods of volatility.

Factor in Fees and Taxes

To get a true picture of your investment’s performance, it’s important to calculate ARR after fees and, where possible, after tax. Fees can have a significant impact on long-term returns, so always check the net result.

While ARR is a valuable tool, it’s not perfect. Here are some things to keep in mind:

No Timing of Cash Flows

ARR assumes you made no additional deposits or withdrawals during the investment period. If you regularly add to or withdraw from your investment, the ARR may not reflect your actual experience. In these cases, a metric like the internal rate of return (IRR) may be more appropriate.

Doesn’t Show Volatility

ARR smooths out the ups and downs, so it doesn’t reveal how bumpy the ride was. Two investments with the same ARR could have very different risk profiles. If you’re concerned about volatility, consider looking at other measures alongside ARR.

Past Performance Isn’t a Guarantee

While ARR shows how an investment has performed in the past, it doesn’t predict future results. Economic conditions, policy changes, and market trends can all affect future returns.

• Always compare investments over the same time period where possible.
• Check whether returns are reported before or after fees and taxes.
• Use ARR as one part of your decision-making toolkit, not the only factor.
• Consider your own risk tolerance and investment goals.

The annualised rate of return is a powerful way to compare investments, especially in a year marked by economic change and uncertainty. By understanding and applying ARR, you can make more informed decisions about your portfolio, whether you’re focused on superannuation, property, shares, or other assets. Take the time to run the numbers and see how your investments really stack up—your future self will thank you.