Future Value Calculator
What will your money be worth in the future? Calculate lump sum growth, regular contributions, or work backwards from your goal — with a year-by-year breakdown.
Try a worked example
How to Use This Calculator
Tab "Lump Sum" 📈
Enter a present value (the amount you are investing today), an annual return rate, and the number of years. The calculator shows the future value, total growth in dollars, and a year-by-year growth table. Use this for a one-time investment where you are not making ongoing contributions.
Tab "With Contributions" 💰
Add a starting balance, a regular contribution amount (monthly or annual), your expected return, and time horizon. The result breaks down how much of your final balance came from your own contributions versus compound growth — often the most motivating number in personal finance.
Tab "How Much Do I Need Now?" 🎯
Working backwards from a target future value — how much must you invest today? Enter your goal amount, expected return, and years until you need the money. The calculator uses the present value formula to tell you the exact lump sum to invest now, assuming no additional contributions.
The Formulas
FV = PV × (1 + r)^n
Where: PV = present value, r = annual rate (decimal), n = years
Future Value with Regular Contributions (Annuity):
FV = PV × (1 + r)^n + PMT × [((1 + r)^n − 1) / r]
Where: PMT = periodic payment, r = rate per period, n = total periods
Required Present Value (Reverse Calculation):
PV = FV ÷ (1 + r)^n
Compounding convention:
Annual contributions → annual compounding (r = annual rate, n = years)
Monthly contributions → monthly compounding (r = annual rate ÷ 12, n = years × 12)
All formulas are standard Time Value of Money (TVM) calculations taught in every finance curriculum. No country-specific tax adjustments are applied — this calculator gives you the pre-tax, pre-fee mathematical result.
Worked Examples
Example 1 — Lump sum: $10,000 at 7% for 20 years
A classic long-term stock market investment scenario:
Your money nearly quadruples in 20 years. Formula: $10,000 × (1.07)^20 = $38,697.
Example 2 — Contributions: $5,000 + $300/month at 6% for 15 years
A savings plan combining a starting balance with monthly contributions:
You invested $59,000 of your own money but ended up with $104,192 — the extra $45,192 is pure compound growth. Over time, compound interest can contribute more than your own contributions.
Example 3 — Reverse: Need $500,000 in 25 years at 7%
Planning for a retirement milestone — how much must you invest today?
Investing $92,123 today at 7% grows to $500,000 in 25 years — without any additional contributions. Formula: $500,000 ÷ (1.07)^25 = $92,123.
Time Value of Money — Why It Matters
The time value of money (TVM) is one of the most powerful concepts in personal finance. A dollar today is worth more than a dollar in the future because today's dollar can be invested and grow. Every financial decision — whether to pay off debt, invest in a pension, buy a property, or keep cash in savings — involves a TVM trade-off.
Understanding future value helps you answer questions like:
- If I invest $500/month for 30 years at 7%, will I have enough to retire?
- How much should I invest today to pay for my child's university in 18 years?
- Is it better to take a lump sum pension payout or monthly payments?
- If inflation runs at 3%, what does today's $50,000 salary look like in 20 years?
The rule of 72 gives a quick shortcut: divide 72 by your annual return to estimate the number of years it takes to double your money. At 7%, your money doubles roughly every 10 years (72 ÷ 7 ≈ 10.3).
Compounding Frequency
This calculator uses annual compounding for annual contributions and monthly compounding for monthly contributions. In practice, many investments compound daily or quarterly, which produces slightly higher results. The difference between annual and daily compounding at 7% over 20 years on $10,000 is about $1,300 — meaningful but not dramatic compared to the rate and time horizon.
Real vs Nominal Returns
The returns you enter here are nominal — they are not adjusted for inflation. A 7% nominal return with 3% inflation is a real return of approximately 4%. If you want to know what your future value is worth in today's purchasing power, reduce your return by the expected inflation rate. Use 4–5% instead of 7–8% when inflation-adjusting.
What Rate Should You Use?
| Asset Class | Historical Annual Return (approx.) |
|---|---|
| Global diversified equities | 7–10% nominal |
| US S&P 500 (long-run average) | ~10% nominal, ~7% real |
| Bonds (government, investment grade) | 2–5% |
| High-yield savings / cash | 3–5% (2024 environment) |
| Real estate (total return incl. rent) | 6–9% |
| Inflation (long-run average) | ~3% |
These are historical averages and do not guarantee future performance. Adjust for your actual portfolio allocation, fees (subtract 0.5–1% for fund costs), and tax drag for taxable accounts.