Future Value Calculator
Find out what your savings or investments will be worth in the future. Enter a starting balance, a monthly contribution, and an expected rate of return to see your projected growth.
Last reviewed .
Future value calculator inputs
| Year | Contributions | Interest | Balance |
|---|
Key insights and growth chart
Key Insights
Balance Growth Over Time
You Might Also Want
What Is Future Value, and Who Should Use This Calculator?
Future value answers a simple but important question: if you save or invest a certain amount now, and keep adding to it, what will that money actually be worth at a specific point down the road? It's the number that turns "I should probably save more" into a concrete figure you can plan around.
This calculator is built for anyone projecting a savings or investment balance forward in time — someone estimating a retirement account balance, saving toward a house down payment, building a college fund, or simply testing what happens if they increase their monthly contribution by $100. It works for any account where you know (or can estimate) a starting balance, a contribution schedule, and an expected rate of return: high-yield savings accounts, brokerage accounts, 401(k)s and IRAs, or CDs.
It is not designed for accounts with irregular, one-time, or step-changing contributions, and it does not model taxes, investment fees, or employer matching — see the Limitations section below for where a more specialized calculator may serve you better.
Future Value Formula
This calculator uses the standard future value of an annuity formula, applied on a monthly compounding basis:
Where t = 1 if contributions are made at the beginning of each month (annuity due), or t = 0 if made at the end of each month (ordinary annuity). If the interest rate is 0%, the formula simplifies to FV = P + (PMT × n), since there is no compounding to apply.
Why the formula has two parts
The formula is really two future value calculations added together. The first term, P(1+i)ⁿ, is the future value of a single lump sum — your starting principal compounding on its own. The second term is the future value of an annuity: a series of equal monthly payments, each compounding for a different length of time depending on how early it was deposited. The first contribution compounds for nearly the entire period; the last contribution barely compounds at all. Summing the future value of every individual contribution would be tedious month by month, so the annuity formula collapses that sum into a single closed-form expression.
Variables Explained
How to Use This Calculator
- Enter your initial investment — the amount you're starting with today. Enter 0 if you're starting from scratch.
- Enter the monthly contribution you plan to add consistently going forward.
- Enter your estimated annual return as a percentage, based on the type of account or investment.
- Enter the time period in years you plan to keep investing or saving.
- Choose whether contributions happen at the beginning or end of each month.
- Review your projected future value, the principal-versus-interest breakdown, and the year-by-year growth table.
Worked Example
Suppose you have $10,000 saved today, and you plan to contribute $300 per month at the end of each month into an account earning 7% annually for 20 years.
- Periodic rate: i = 0.07 / 12 = 0.005833
- Number of periods: n = 20 × 12 = 240
- Growth of principal: $10,000 × (1.005833)240 ≈ $40,387
- Growth of contributions: $300 × [((1.005833)240 − 1) / 0.005833] ≈ $156,278
- Future value ≈ $196,665
Of that total, $10,000 is your original principal, $72,000 is contributions ($300 × 240 months), and roughly $114,665 is interest earned through compounding.
A second example: catching up on retirement
Now suppose you're starting later with a larger balance: $85,000 already saved in a retirement account, contributing $1,000 per month at the beginning of each month, earning 8% annually, for 15 years until retirement.
- Periodic rate: i = 0.08 / 12 = 0.006667
- Number of periods: n = 15 × 12 = 180
- Growth of principal: $85,000 × (1.006667)180 ≈ $281,088
- Growth of contributions (beginning-of-month): $1,000 × [((1.006667)180 − 1) / 0.006667] × 1.006667 ≈ $348,345
- Future value ≈ $629,433
Here, contributions and their growth (about $528,345, including the extra month of interest from beginning-of-month timing) actually outweigh the original balance's growth — a reminder that consistent contributions often matter more than the size of your starting balance.
How to Interpret Your Results
The future value figure represents the total projected balance at the end of your chosen time period, assuming your inputs hold steady. The breakdown between contributions and interest matters: the larger the interest share relative to your total deposits, the harder your money is working for you through compounding rather than through new deposits alone. Over long horizons, it's common for interest earned to eventually exceed total contributions — that inflection point is often called the "crossover point" in compound growth.
Benefits
- Turns an abstract savings goal into a concrete, dated number.
- Shows the real impact of compounding over long time horizons.
- Helps compare different contribution amounts or timelines side by side.
- Useful for retirement, education, house down payment, or general wealth-building goals.
Limitations
- Assumes a constant rate of return; real markets fluctuate year to year.
- Assumes a level monthly contribution with no changes over time.
- Does not account for taxes, fees, or inflation unless you adjust the rate manually.
- Not a substitute for a full financial plan or professional advice.
Common Mistakes
- Using an overly optimistic rate of return not grounded in the account type.
- Forgetting that contributions and rates are entered as monthly and annual figures respectively.
- Ignoring inflation when projecting decades into the future.
- Assuming the projection is a guarantee rather than an estimate.
Practical Tips
- Run the calculator with a conservative and an optimistic rate to see a realistic range.
- Increasing your monthly contribution usually has a bigger near-term impact than chasing a higher return.
- Starting even a few years earlier can meaningfully increase your final balance due to compounding.
- Revisit your projection annually and adjust contributions as your income changes.
Future Value vs. Present Value
Future value tells you what money you have (or will contribute) today will grow into at a later date. Present value does the opposite: it tells you what a future sum of money is worth today, discounted back at a given rate. They're the same time-value-of-money formula solved for different variables.
You use future value when you're asking "what will my savings become?" You use present value when you're asking "how much do I need today to reach a specific future goal?" — for example, figuring out the lump sum you'd need to invest right now to hit a $500,000 retirement target in 25 years.
| Question | Future Value | Present Value |
|---|---|---|
| What it answers | What will this money be worth later? | What is that future money worth today? |
| Direction | Projects forward in time | Discounts backward in time |
| Typical use | Savings and investment growth projections | Lump-sum planning, loan/annuity pricing |
| Known inputs | Principal, contributions, rate, time | Future target amount, rate, time |
| Solved for | Ending balance | Starting balance |
If you know your target number and want to work backward, CalcPro's Present Value Calculator handles that calculation directly.
Future Value vs. Compound Interest
These two terms get used interchangeably, which causes confusion. Compound interest is the mechanism — interest earned on both your original principal and on interest you've already earned. Future value is the result — the actual dollar figure that mechanism produces after a specific period.
In practice: compound interest is the "why" your money grows faster over time; future value is the "how much" at a specific future date. A compound interest calculator often just answers "how much interest will I earn?" while a future value calculator (like this one) answers the fuller question — factoring in ongoing contributions, not just a single starting balance.
Want to isolate just the compounding effect on a single lump sum, without ongoing contributions? Try CalcPro's Compound Interest Calculator.
Future Value vs. CAGR
CAGR (Compound Annual Growth Rate) is the smoothed annual rate that would take an investment from its starting value to its ending value over a period, assuming steady compounding — it's typically calculated after the fact, from actual historical numbers. Future value is calculated ahead of time, projecting forward from an assumed rate of return.
Investors often use CAGR to evaluate how a past investment actually performed (smoothing out the year-to-year noise of real markets), then use that CAGR figure as the input rate for a future value projection going forward. In other words: CAGR is how you measure the past; future value is how you project the future — and this calculator's "Estimated annual return" field is essentially asking you to supply a CAGR assumption.
Real-Life Future Value Scenarios
Retirement Investing
A 35-year-old with $45,000 already saved contributes $600/month at a 7% expected return until age 65 (30 years). That's a future value of roughly $45,000 growing alongside 360 monthly contributions — the kind of long horizon where compounding does most of the heavy lifting. Try the preset above to see this scenario calculated live.
House Down Payment Savings
Saving for a 20% down payment on a future home purchase is a shorter, more conservative horizon — often 3 to 7 years in a high-yield savings account or CD rather than the stock market, since the money is needed on a fixed timeline and can't afford a market downturn right before closing.
Child Education Fund
Parents starting a college fund when a child is born have an 18-year horizon — long enough to justify more growth-oriented assumptions than a house down payment, but short enough that many shift to more conservative investments as the target date approaches (a strategy sometimes called a "glide path").
Emergency Fund Growth
An emergency fund isn't really an "investment growth" goal — it's a savings target (typically 3–6 months of expenses) that should stay liquid and low-risk. Future value still applies, just with a modest rate matching a high-yield savings account rather than market returns. CalcPro's Savings Calculator is built specifically for this shorter, lower-risk use case.
Long-Term Investing
For horizons of 25+ years — the classic "invest and let it compound" scenario — small differences in monthly contribution or rate assumption compound into large differences in outcome. This is where the year-by-year breakdown table above is most useful: it shows exactly when contributions stop being the main driver of growth and compounding takes over.
Frequently Asked Questions
What is future value?
Future value (FV) is the projected worth of a sum of money today, plus any additional contributions, after it grows at a given interest rate over a set period of time. It is one of the core concepts of the time value of money and is used to project savings, investments, and retirement balances.
How is future value calculated?
Future value is calculated with FV = P(1+i)^n + PMT × [((1+i)^n − 1) / i], where P is the starting principal, PMT is the recurring contribution, i is the periodic interest rate, and n is the number of periods. This calculator applies that formula on a monthly basis.
What is the difference between future value and present value?
Future value tells you what a sum of money will be worth later, while present value tells you what a future sum is worth today, discounted back at an interest rate. They are inverse calculations built on the same time-value-of-money principle.
Does this calculator account for inflation?
Yes, optionally. Turn on the inflation adjustment toggle above and enter an assumed inflation rate to see your result in today's purchasing power alongside the nominal (pre-inflation) figure.
Should I choose beginning-of-month or end-of-month contributions?
Beginning-of-month contributions (an annuity due) earn one extra month of interest compared to end-of-month contributions (an ordinary annuity). Automatic payroll deductions or transfers scheduled early in the month are best modeled as beginning-of-month; deposits made at month's end should use end-of-month.
What interest rate should I use?
Use a realistic annual rate of return based on the account type. High-yield savings accounts and CDs typically post their actual rate. For diversified stock portfolios, many planners use a long-run historical average between 6% and 10% before inflation, though future returns are never guaranteed.
How does compounding frequency affect future value?
More frequent compounding produces a slightly higher future value because interest is calculated and added to the balance more often, so subsequent interest is earned on a larger base. This calculator compounds monthly, which matches how most savings accounts, CDs, and retirement contributions are structured.
Can I use this calculator for retirement planning?
Yes. Enter your current retirement balance as the initial investment, your planned monthly contribution, an expected annual return, and the number of years until retirement to see a projected balance. For a more detailed projection with employer match and withdrawal modeling, see CalcPro's dedicated Retirement Calculator.
What happens if I enter a 0% interest rate?
With a 0% rate, the calculator simply adds your contributions to your initial investment with no growth, since there is no interest to compound. This is useful for seeing your contribution total in isolation.
Is future value the same as compound interest?
They are related but not identical. Compound interest describes the mechanism by which money grows, while future value is the resulting dollar amount after that growth is applied to a principal and any contributions over time.
How accurate is this future value calculator?
The math is exact for the inputs you provide. The result is only as accurate as your assumptions about future contributions and rate of return, which cannot be guaranteed, especially for market-based investments.
Can I change my contribution amount partway through the projection?
This calculator assumes a level monthly contribution for the entire period. To model a change in contribution amount, run the calculator separately for each period at the new contribution level, using the prior period's ending balance as the new starting principal.
Key Terms Glossary
Methodology & Sources
This calculator applies the standard future value of an annuity formula used in financial mathematics and taught in personal finance and CFP curricula. It compounds monthly because that matches how most savings accounts, CDs, and retirement contributions are actually credited and deposited.
Background on compound growth and account rate assumptions referenced on this page draws on publicly available investor-education resources, including:
- Investor.gov (opens in new tab) (U.S. Securities and Exchange Commission) — investor education on compound interest and long-term investing.
- Consumer Financial Protection Bureau (opens in new tab) — guidance on savings accounts and consumer financial products.
- Federal Reserve (opens in new tab) — data on historical savings and deposit account yields.
This tool is provided for educational and planning purposes and does not constitute financial advice. It does not access, store, or transmit the numbers you enter — all calculations run locally in your browser.
Editorial policy: the formula and worked examples on this page are shown in full so you can reproduce any result by hand or in a spreadsheet. Update policy: if you spot an outdated assumption (such as a typical rate-of-return range), please let us know so we can correct it.
About This Calculator
This calculator applies the standard future value formula for a starting balance plus regular monthly contributions, as described above.
Checking the Results
The two worked examples earlier on this page show every step, so you can reproduce the calculator's output by hand or in a spreadsheet.
Assumptions
- Compounding occurs monthly, matching how most savings, CD, and retirement accounts actually credit interest.
- Your monthly contribution amount stays level for the entire period you enter — see the FAQ above for how to model a change mid-way.
- The rate of return you enter is treated as constant for the full period, even though real returns vary year to year.
- Figures are nominal (pre-inflation) unless you use the inflation adjustment described below.
Data Limitations
This calculator does not access live market data, account information, or any external financial data source — every number in the projection comes directly from what you enter. It does not model taxes, account fees, employer matching, contribution limits, or early-withdrawal penalties. For scenarios where those factors matter significantly (most notably retirement accounts), treat this as a directional estimate and pair it with a calculator built for that specific account type.
Spot an error or have a suggestion? We'd genuinely like to know — reach out via our contact page.
Last reviewed .