Practical guide
Understanding investment return comparison — compare starting value
Everyday editorial team · GEOINNOVATION CO., LTD · Published · Updated
What this calculation is for
An annualized return turns a starting and ending value into a comparable compound rate. It is meaningful only when the cash-flow assumptions match: deposits made inside the holding period cannot simply be mistaken for investment gains.
How the method works
The ending-to-starting value ratio is raised to the reciprocal of years. Entered inflation and fee assumptions provide a simplified illustrative real-return comparison rather than an exact tax-adjusted performance measure. The displayed model uses: Annualized compound growth from beginning and ending values; subtract entered annual inflation and fees for illustrative real return.
A worked example
For an illustrative investment return comparison scenario, use Starting value: 10000 $; Ending value: 18000 $; Holding period: 8 years; Inflation assumption: 2.5 %; Estimated annual fee: 0.25 %. The modeled annualized compound return is 7.62%. These are example assumptions, not current prices, official benefit amounts or personalized advice.
Assumptions and real-world differences
A positive starting value is required. Interim deposits, withdrawals, dates and tax effects are excluded; use a cash-flow-aware return method for a portfolio with substantial external flows. Cash flows inside the period change the interpretation; this comparison is not an investment performance report.
Comparing two starting value assumptions
The baseline and alternative calculations change starting value while keeping the remaining model inputs the same. This isolates that particular assumption rather than comparing two completely different plans. Read both detailed outcomes and the B-minus-A difference in the headline’s units. A larger number is not automatically better: a larger cost and a larger savings balance have opposite interpretations.
Reproduce this tool’s example
These fixed example inputs are independent of edits you make above. Enter them in this tool to reproduce the result, then replace them with your own assumptions.
- Starting value
- 10,000 $
- Ending value
- 18,000 $
- Holding period
- 8 years
- Inflation assumption
- 2.5 %
- Estimated annual fee
- 0.25 %
- Alternative starting value
- 12,500 $
Scenario B result: 4.66%
Scenario A: 7.62%. Annualized compound return.
- Scenario A main result: 7.62%
- Scenario B main result: 4.66%
- Numeric difference (B − A), in result units: -2.96
Frequently asked questions
- Is this the same as money-weighted return?
- No. A money-weighted calculation incorporates the amounts and timing of intermediate cash flows.
- Which inputs should I check before using this investment return comparison estimate?
- Check starting value, ending value, holding period, inflation assumption, estimated annual fee. Match each field’s unit and time period, then compare the detailed rows rather than treating the headline alone as the complete answer.
- Can I also change other assumptions in the alternative?
- This one-factor comparison deliberately holds them fixed. Use the two-scenario version when rates, costs, timing or several household inputs all differ.