Methodology
This calculator projects portfolio value by combining initial principal, recurring contributions, and compound return assumptions across the selected horizon.
Investment Growth Calculator
Project your investment growth with regular contributions
Enter Details
Results
Total Invested
$130,000.00
Final Amount
$321,181.36
Investment Gain
$191,181.36
Return on Investment
147.1%
Investment Tips
Diversify across different asset classes to help manage risk over time
Quick Facts
Historical market averages show 8-10% annual returns over long periods
Note
Returns vary by year—past performance doesn't guarantee future results
How It Works
This calculator shows the power of compound interest combined with regular monthly contributions. Your money grows not just from returns on your initial investment, but also from returns on your contributions and accumulated gains.
Last updated: February 2026
Investment growth FAQ
What is ROI in this calculator?
ROI is the percentage gain relative to total invested amount over the selected period.
Does this account for taxes or fees?
No. The estimate is pre-tax and does not include fund expenses or brokerage fees.
Can future returns be lower than expected?
Yes. Annual returns vary over time, so use conservative assumptions for planning scenarios.
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Assumptions
- Contributions are made consistently at the chosen interval.
- Return rate is an average annualized estimate.
- Taxes, investment fees, and contribution limits are not automatically deducted.
Worked example
Example: $25,000 starting balance with $500 monthly contributions at 6.5% expected return over 15 years. The tool estimates ending value, total contributions, and growth attributable to returns.
Edge cases and limitations
- Real markets are volatile, and sequence-of-returns risk is not modeled directly.
- Short periods can diverge significantly from expected averages.
- Inflation is not implicit unless you manually reduce return assumptions.
When this calculator is not appropriate
For retirement drawdown, tax-efficient withdrawal strategy, or risk-based planning, use a full financial plan with a licensed advisor.