Investment Return Calculator for Smarter Planning.
Estimate the potential future value of an investment using your own starting amount, regular contributions, expected return and investment period. Explore how time and compounding can influence long-term investment growth.
Investment Details
Enter your own figures below. No example values are pre-filled.
Potential Investment Value
This calculator provides an illustrative projection based on the assumptions entered. Investment returns are not guaranteed, and actual results may be higher or lower.
What Determines Your Investment Return?
Your potential investment value is influenced by several variables. Changing one assumption can make a meaningful difference to a long-term projection.
Starting Amount
A larger initial investment gives more capital the opportunity to participate in future investment growth from the beginning.
Regular Contributions
Adding money regularly can increase the total amount invested and provide additional capital for potential future growth.
Rate of Return
The assumed annual return has a significant effect on projections, particularly when the investment period is long.
Time
Longer investment periods give contributions and potential investment returns more time to compound.
Compounding
Compounding means returns can themselves generate further returns when they remain invested.
Costs & Inflation
Fees and inflation can reduce the real value of investment returns and should be considered alongside projections.
How the Investment Return Formula Works
For an initial lump sum, compound-growth mathematics can be used to estimate future value. Regular contributions are incorporated into the projection based on the selected calculation method.
Where P represents the initial investment, PMT represents regular contributions, r is the annual return rate, n is the compounding frequency and t is the number of years.
The result is an estimate rather than a prediction. Real investment performance varies over time.
Calculation Summary
Complete the calculator above to generate your personalised projection.
How Different Return Assumptions Can Change the Projection
These scenarios use the figures you enter above. Nothing is displayed until you calculate your investment projection.
4% annual return
Illustrates how your investment could look using a lower assumed annual return.
7% annual return
Illustrates a different projection using a mid-range assumed annual return.
10% annual return
Illustrates how a higher assumed annual return changes the mathematical projection.
Four Things to Consider Alongside Your Return Estimate
A calculator can help with projections, but a realistic investment decision requires more than a single expected return figure.
Risk
Higher potential returns generally involve greater uncertainty. Consider how comfortable you are with temporary or substantial losses.
Diversification
Spreading investments across assets, sectors and regions can reduce reliance on one investment or market.
Fees
Platform fees, fund charges, dealing costs and other expenses can reduce the amount that remains invested.
Inflation
A positive nominal return does not necessarily mean your purchasing power will increase after inflation is considered.
Use the Calculator as a Planning Tool, Not a Promise
Investment calculators are useful for exploring scenarios. They can show how changing the amount invested, contribution level, return assumption or time horizon affects a mathematical projection.
However, actual markets do not deliver a fixed return every year. A portfolio might experience strong growth in one year and losses in another.
For this reason, consider running several scenarios rather than relying on one expected return. Combining different assumptions with a clear understanding of risk can provide a more balanced starting point for financial planning.
More Investing & Finance Articles
Explore the latest GrowthSmartly articles covering investing, markets and personal finance.
Investment Return Calculator FAQs
Find answers to common questions about investment return calculations, compounding, contributions and projections.
Plan Your Investments With Greater Clarity.
Explore practical investment guides, calculators and financial education designed to help you understand your options and make more informed money decisions.