Future Value Calculator
Estimate the future value of your investment with regular deposits and compound interest over time.
Periodic Contributions
Future Value
$17,510.44
Total Deposits
$14,800.00
Accrued Interest
$2,710.44
Time-Weighted Return
18.31%
Effective Rate (APY)
5.12%
Initial Deposit
$10,000.00
Total Interest Earned
$2,710.44
Breakdown
| Year | Deposits | Interest | Total Deposits | Accrued Interest | Balance |
|---|---|---|---|---|---|
| Start | $10,000.00 | - | $10,000.00 | - | $10,000.00 |
| 1 | $1,200.00 | $48.30 | $11,200.00 | $539.50 | $11,739.50 |
| 2 | $1,200.00 | $55.88 | $12,400.00 | $1,168.01 | $13,568.01 |
| 3 | $1,200.00 | $63.86 | $13,600.00 | $1,890.06 | $15,490.06 |
| 4 | $1,200.00 | $72.24 | $14,800.00 | $2,710.44 | $17,510.44 |
How to Use
- 1
Enter your present value (initial investment amount)
- 2
Set the annual interest rate and compounding frequency
- 3
Specify the investment duration in years and months
- 4
Optionally add periodic contributions with your preferred frequency and timing
- 5
Choose deposit timing: beginning or end of each period (annuity due vs ordinary annuity)
- 6
View the future value, total deposits, accrued interest, and year-by-year breakdown
- 7
Understanding the key inputs — present value is your starting balance, and the interest rate should match the compounding frequency you select
- 8
Interpreting the results — the year-by-year breakdown shows how compound growth accelerates over time, with interest earning interest in later years
Examples
Good Examples
Growth with monthly deposits
$10,000 initial + $100/mo at 5% for 4 years (monthly compounding) = $17,510.44Long-term investment growth
$10,000 initial at 8% for 30 years (no deposits) = $100,626.57Annuity due advantage
$100/mo at 5% for 10 years (deposits at beginning) earns slightly more than end-of-period depositsCollege fund savings plan
$5,000 initial + $200/mo at 6% for 18 years ≈ $91,880 — enough to help cover tuitionComparing compounding frequencies
$25,000 at 4.5% for 5 years: annual compounding = $31,286; monthly compounding = $31,382. Monthly earns $96 moreBad Examples
Ignoring compounding frequency
5% compounded monthly ≠ 5% compounded annually — the difference compounds over timeUsing unrealistic interest rates
Expecting 15%+ annual returns consistently over decadesForgetting inflation
A future value of $17,510 at 3% inflation is only worth ~$15,600 in today's dollars after 4 yearsConfusing future value with total deposits
Total deposits of $14,800 ($10,000 + $100×48) ≠ future value of $17,510 — the extra $2,710 is earned interestCommon Mistakes
- Confusing present value with total deposits — total deposits includes your initial amount plus all contributions
- Ignoring compounding frequency — more frequent compounding leads to higher effective returns
- Not distinguishing deposit timing — beginning vs end of period makes a difference (annuity due vs ordinary annuity)
- Forgetting inflation erodes real returns — always consider the purchasing power of future money
- Using nominal rate instead of effective rate — 5% compounded monthly is actually 5.12% APY
- Assuming linear growth — compound interest accelerates, so early years grow slowly while later years grow much faster
- Not accounting for taxes — investment gains may be taxable, reducing the actual future value you receive
- Forgetting to adjust contributions for inflation — a fixed $100/month contribution buys less each year
Frequently Asked Questions
What is future value?
Future value (FV) is the value of an asset or investment at a specified date in the future, based on an assumed rate of growth over time. It shows how much your money will be worth after earning interest or returns.
What is the difference between ordinary annuity and annuity due?
In an ordinary annuity, deposits are made at the end of each period. In an annuity due, deposits are made at the beginning. Annuity due earns slightly more interest because each deposit has one extra compounding period to grow.
What is APY and how does it differ from the stated rate?
APY (Annual Percentage Yield) is the effective annual rate that accounts for compounding. For example, 5% compounded monthly gives an APY of 5.12%. The more frequently interest compounds, the larger the gap between nominal rate and APY.
What does "Time-Weighted Return" mean?
Time-Weighted Return (TWR) represents the cumulative rate of return adjusted for the effects of your regular deposits. It shows the percentage gain on your total invested amount, helping you evaluate investment performance.
Can I use this for retirement planning?
Yes — enter your current savings as the present value, your expected annual return, the years until retirement, and your planned monthly contributions. The calculator will estimate your retirement nest egg.
What is the difference between future value and present value?
Present value is the current worth of a future sum of money, while future value is what a current sum will grow to over time. Present value discounts future cash flows back to today, while future value compounds today's money forward. They are inverse calculations of the time value of money.
How does inflation affect future value calculations?
Inflation reduces the purchasing power of future money. The real future value is lower than the nominal future value. To account for inflation, use the real interest rate (nominal rate minus inflation rate) in your calculations for a more accurate picture of what your money will actually be worth.
Future value vs compound interest calculator — which one should I use?
Use the compound interest calculator when you want to see how interest accumulates on a single deposit. Use the future value calculator when you need to project the growth of an investment with regular contributions or when comparing lump sum vs periodic deposit scenarios.
How to calculate the future value of a 401k or retirement account?
Enter your current 401k balance as the present value, your expected annual return rate (typically 7-10% for stock-heavy portfolios), the years until retirement, and your monthly or annual contribution amount. The calculator will project your total retirement savings including employer match if added to contributions.
What is the future value of an annuity vs a lump sum?
A lump sum future value shows how a single deposit grows over time. An annuity future value shows how a series of equal periodic payments grows. The annuity formula accounts for each payment compounding for a different number of periods, which is why regular investing can be powerful over long timeframes.