Finance
Investment Calculator
Estimate compound investment growth, future portfolio value, monthly contributions, total returns, and the long-term effect of annual fees.
Investment Calculator
Estimate future portfolio value using an initial investment, monthly contributions, expected compound return, investment period, annual fees, and your preferred currency.
Changing the currency changes the denomination used for the inputs and results. It does not perform an exchange-rate conversion.
Estimated final portfolio value
USD 323,059.57
United States Dollar (USD)
Estimated value after monthly contributions, compound growth, and annual investment fees.
Final value
USD 323,059.57
After 20 years
Total contributions
USD 130,000.00
Initial investment plus monthly additions
Total growth
USD 206,021.77
Estimated investment returns
Total fees
USD 12,962.20
Estimated fee impact
Planning summary
Expected return: 8.00%
Annual fees: 0.50%
Investment period: 20 years
Currency: USD
Investment returns are not guaranteed. This calculator provides planning estimates based on fixed assumptions and does not predict actual market performance.
Scenario comparison
Save and export multiple investment results
Store different currency, contribution, return, fee, and time-horizon scenarios in this browser. Select the results you want and export them together as a CSV or TXT file.
Saved scenarios are stored locally in this browser. They are not synced to an account or another device.
Page guide
On this page
Jump to the investment breakdown, yearly schedule, compound growth explanation, fees, examples, limitations, or frequently asked questions.
Investment breakdown
Contributions, growth, and fees
Year-by-year schedule
Annual balance changes
How it works
Calculation process
Growth formula
Future value factors
About the calculator
Purpose and common uses
Compound growth
How returns build over time
Investment example
Sample calculation
Quick scenario table
Example planning inputs
Investment fees
Long-term fee impact
How to use it
Scenario-planning guidance
Limitations
Assumptions and uncertainty
Investment FAQ
Common questions
Recommended Investing Book
Learn a simple approach to long-term investing
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This section may contain affiliate links.

Investment growth breakdown
Compare how much of the projected portfolio value comes from your contributions, estimated growth, and fees.
Year-by-year investment schedule
Review how the projected account balance changes each year after contributions, investment growth, and fees.
| Year | Starting balance | Contributions | Growth | Fees | Ending balance |
|---|---|---|---|---|---|
| 1 | USD 10,000.00 | USD 6,000.00 | USD 1,094.12 | USD 68.84 | USD 17,025.28 |
| 2 | USD 17,025.28 | USD 6,000.00 | USD 1,675.86 | USD 105.44 | USD 24,595.70 |
| 3 | USD 24,595.70 | USD 6,000.00 | USD 2,302.74 | USD 144.88 | USD 32,753.56 |
| 4 | USD 32,753.56 | USD 6,000.00 | USD 2,978.27 | USD 187.38 | USD 41,544.45 |
| 5 | USD 41,544.45 | USD 6,000.00 | USD 3,706.21 | USD 233.18 | USD 51,017.48 |
| 6 | USD 51,017.48 | USD 6,000.00 | USD 4,490.65 | USD 282.54 | USD 61,225.59 |
| 7 | USD 61,225.59 | USD 6,000.00 | USD 5,335.95 | USD 335.72 | USD 72,225.81 |
| 8 | USD 72,225.81 | USD 6,000.00 | USD 6,246.84 | USD 393.03 | USD 84,079.62 |
| 9 | USD 84,079.62 | USD 6,000.00 | USD 7,228.42 | USD 454.79 | USD 96,853.25 |
| 10 | USD 96,853.25 | USD 6,000.00 | USD 8,286.16 | USD 521.34 | USD 110,618.07 |
| 11 | USD 110,618.07 | USD 6,000.00 | USD 9,425.98 | USD 593.05 | USD 125,451.01 |
| 12 | USD 125,451.01 | USD 6,000.00 | USD 10,654.25 | USD 670.33 | USD 141,434.93 |
| 13 | USD 141,434.93 | USD 6,000.00 | USD 11,977.83 | USD 753.60 | USD 158,659.15 |
| 14 | USD 158,659.15 | USD 6,000.00 | USD 13,404.11 | USD 843.34 | USD 177,219.92 |
| 15 | USD 177,219.92 | USD 6,000.00 | USD 14,941.07 | USD 940.04 | USD 197,220.94 |
| 16 | USD 197,220.94 | USD 6,000.00 | USD 16,597.29 | USD 1,044.25 | USD 218,773.99 |
| 17 | USD 218,773.99 | USD 6,000.00 | USD 18,382.03 | USD 1,156.54 | USD 241,999.48 |
| 18 | USD 241,999.48 | USD 6,000.00 | USD 20,305.26 | USD 1,277.54 | USD 267,027.20 |
| 19 | USD 267,027.20 | USD 6,000.00 | USD 22,377.73 | USD 1,407.93 | USD 293,997.00 |
| 20 | USD 293,997.00 | USD 6,000.00 | USD 24,611.01 | USD 1,548.44 | USD 323,059.57 |
How this investment calculator works
The calculation begins with your initial investment and adds the monthly contribution amount throughout the selected investment period. An expected return is then applied to estimate how the balance may grow through compounding.
Annual investment fees are deducted from the projected account value. Because fees reduce the balance left invested, they also reduce the amount available to earn future compound returns.
The selected currency labels the investment amounts and results. Changing the currency does not automatically convert an existing amount using an exchange rate.
The result includes an estimated final balance, total contributions, investment growth, fees, and a year-by-year schedule. These figures are projections based on your assumptions, not guaranteed market outcomes.
Investment growth and future value formula
Investment future value depends on the amount invested, recurring contributions, expected rate of return, compounding period, time, and fees.
General investment growth relationship
Future value = contributions + compounded returns − fees
A simple future-value formula can model a single lump sum, but recurring monthly deposits and annual fees make the calculation more detailed. The year-by-year schedule shows how these factors combine over the full investment period.
What is an investment calculator?
An investment calculator estimates how money may grow over time based on an initial deposit, recurring contributions, expected returns, the investment period, and annual fees. It can help you compare potential long-term outcomes before making a financial plan.
This type of calculator can be used for retirement planning, general investing, education savings, long-term wealth goals, or comparing contribution strategies. You can change one assumption at a time to see how return rates, fees, monthly deposits, and time affect projected future value.
How compound investment growth works
Compound growth happens when an investment earns returns on both the money contributed and earlier investment gains. As the balance increases, future returns are calculated on a larger amount.
Monthly contributions can strengthen this effect by continually adding capital to the portfolio. Contributions made earlier generally have more time to compound than contributions made near the end of the investment period.
Time is therefore an important part of investment planning. Extending the investment period can sometimes have a larger effect than increasing the assumed return, especially when regular contributions continue.
Investment calculator example
Suppose you begin with USD 10,000.00, contribute USD 500.00 each month, use an expected annual return of 8%, invest for 20 years, and include annual fees of 0.5%.
The calculator combines the initial deposit and monthly contributions with projected compound growth, then subtracts the estimated fee impact. The resulting balance can be much larger than the total amount contributed because earlier deposits have more time to earn returns.
You can save this scenario, change the return rate, currency, or fee percentage, and save another result to compare different assumptions in the same table.
Quick investment scenario table
These example inputs show how different contribution amounts and investment periods can be modeled.
| Scenario | Initial investment | Monthly contribution | Years | Expected return |
|---|---|---|---|---|
| Starter plan | USD 5,000.00 | USD 200.00 | 10 | 6% |
| Steady growth plan | USD 10,000.00 | USD 500.00 | 20 | 8% |
| Long-term plan | USD 25,000.00 | USD 750.00 | 30 | 7% |
These figures are example inputs rather than promised outcomes. The actual result depends on market performance, fees, contribution timing, taxes, withdrawals, and other factors.
Why investment fees matter
Investment fees reduce the account balance directly. They can include fund expense ratios, management fees, advisory fees, or other recurring costs.
Fees also reduce future compounding because the money deducted is no longer available to earn returns. A small annual percentage can therefore produce a substantial difference over a long investment period.
Including fees creates a more realistic projection than modeling investment returns alone. Try comparing the same scenario with different fee percentages to see the estimated long-term effect.
How to use the calculator for investment planning
Start by choosing the currency in which you want to express the investment. Then enter the amount already available to invest and the contribution you expect to make each month.
Choose a reasonable time horizon, expected annual return, and annual fee percentage. Avoid relying on a single optimistic return assumption.
Save conservative, moderate, and optimistic scenarios so you can compare a wider range of possible outcomes.
You can also compare different monthly contribution amounts or investing periods. Increasing regular contributions, reducing fees, or investing for longer may substantially change the projected final value.
Investment calculator assumptions and limitations
This calculator assumes the return and annual fee rates entered remain consistent throughout the investment period. Real markets do not normally produce the same return every year, so actual results can be higher or lower than the estimate.
The selected currency is used as a unit for displaying the amounts. The calculator does not retrieve live exchange rates or convert values from one currency into another.
The calculation does not predict market losses, changing tax rules, inflation, contribution timing differences, trading costs, withdrawals, or changes in investment strategy unless those factors are already reflected in the values you enter.
Use the result for general planning and scenario comparison rather than as a guarantee, financial recommendation, or substitute for advice from a qualified professional.
Investment calculator FAQ
How does an investment calculator work?
An investment calculator combines your starting investment, recurring contributions, expected annual return, investment period, and annual fees to estimate the portfolio's future value.
Does changing the currency convert my investment?
No. The selected currency labels the amounts you enter and the results shown. It does not convert an amount using a live exchange rate.
Do monthly contributions make a difference?
Yes. Regular monthly contributions add more capital to the portfolio, and earlier contributions have more time to benefit from compound growth.
Why should investment fees be included?
Fees reduce the portfolio balance directly and leave less money available to earn future returns. Even a small annual fee can have a significant long-term effect.
Are the calculated investment returns guaranteed?
No. The results are estimates based on the values entered. Real investments can produce higher or lower returns, and investment losses are possible.
What annual return should I enter?
Use a reasonable long-term estimate for the investment being modeled. It is useful to calculate conservative, moderate, and optimistic scenarios instead of relying on one return assumption.
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