Investment Calculator — Project Your Returns
See how any investment could grow over time with compound returns and regular contributions. Free, instant, with AI-powered investment insights.
How Investment Growth Is Calculated
When you invest money and it earns a return, that return compounds over time — you earn returns not just on your original investment, but on the returns you've already accumulated. This calculator models that growth month by month based on your initial investment, ongoing contributions and expected return rate.
Total contributed: 77,000 · Investment growth: 107,305
What Is a Realistic Investment Return?
The return rate you use has a huge impact on your projection, so it's important to use a realistic figure rather than an overly optimistic one.
| Investment Type | Typical Long-Term Annual Return | Risk Level |
|---|---|---|
| Savings account / cash | 2-4% | Very low |
| Government bonds | 3-5% | Low |
| Balanced fund (60/40 stocks/bonds) | 5-7% | Medium |
| Global stock market index fund | 7-10% | Medium-high |
| Individual stocks | Highly variable | High |
The Impact of Starting Early
Because investment growth compounds, starting even a few years earlier can make a significant difference to your final outcome — often more impactful than increasing your monthly contribution later.
| Years Invested | Monthly Contribution | Rate | Projected Value |
|---|---|---|---|
| 10 years | 300 | 7% | 52,093 |
| 20 years | 300 | 7% | 156,455 |
| 30 years | 300 | 7% | 367,038 |
| 40 years | 300 | 7% | 790,583 |
Notice that doubling the time from 20 to 40 years more than quintuples the final value — this is the power of compound growth over long time horizons.
Understanding Risk and Volatility
- Higher returns generally mean higher risk. Investments with historically higher average returns (like stocks) also experience larger short-term swings, including periods of significant loss.
- Diversification reduces risk. Spreading investments across different assets, sectors and geographies reduces the impact of any single investment performing poorly.
- Time horizon matters. Longer investment periods allow more time to recover from short-term downturns, which is why higher-risk investments are often more suitable for long-term goals.
- Fees erode returns over time. Even a seemingly small annual fee (1-2%) can significantly reduce your final investment value over decades — always factor in fees when comparing investment options.
Investment vs Savings — Which Is Right for You?
Money you might need within the next few years is generally better kept in a savings account or our Emergency Fund, since investments can lose value in the short term. Money you won't need for 5+ years may benefit from the potentially higher long-term returns investing offers. Our Savings Calculator can help you compare a lower-risk savings approach against the investment projections shown here.
FAQs
What is a realistic return to expect from investing?
A diversified global stock market index fund has historically returned around 7-10% annually over long periods before inflation, though with significant year-to-year variation. Lower-risk options like bonds typically return 3-5%.
How does compound growth work in investing?
You earn returns not just on your original investment, but on the returns already accumulated. Over long time periods this creates exponential rather than linear growth.
Should I invest a lump sum or contribute monthly?
Both can work well — a lump sum invested early has more time to grow, while monthly contributions (dollar-cost averaging) smooth out the impact of market timing. Many people do both: invest what they have now, then continue contributing monthly.
How much difference does starting early make?
Significant. Because of compounding, starting 10-20 years earlier often has more impact on your final outcome than substantially increasing your monthly contribution later.
What's the difference between saving and investing?
Savings accounts offer lower but more stable returns and immediate access, suited to short-term goals. Investing offers potentially higher returns over the long term but carries risk of losing value, especially in the short term.
Do fees really make a difference to my investment returns?
Yes, significantly. Even a 1-2% annual fee can substantially reduce your final investment value over decades, since fees compound against you the same way returns compound for you.
Is this investment calculator accounting for tax?
No — this calculator shows gross growth before any investment tax. Tax treatment varies significantly by country and account type, so consult a financial adviser for guidance specific to your situation.
Is this calculator free?
Yes — completely free, no sign-up required. Enter your figures above for an instant projection.