Investment Growth Calculator
What could consistent investing grow to? Explore the possibilities, whether you are getting started or starting again. For learners ages 14+.
If I start investing now…
Amounts in USD.
Advanced options
Monthly contributions, made at the end of each month. Taxes and investment fees are not modeled.
$756,437
Projected investment value · hypothetical
- You contribute
- $145,000 Includes starting balance
- Estimated growth / loss
- $611,437
- Years invested
- 40
Projected balanceYour contributions
$756,437Hypothetical USD values
Age 25Age 65
- Balance
- $756,437
- Contributed
- $145,000
- Growth / loss
- $611,437
View year-by-year values
| Age | Balance | Contributed | Growth / loss |
|---|---|---|---|
| 25 | $1,000 | $1,000 | $0 |
| 26 | $4,784 | $4,600 | $184 |
| 27 | $8,833 | $8,200 | $633 |
| 28 | $13,165 | $11,800 | $1,365 |
| 29 | $17,801 | $15,400 | $2,401 |
| 30 | $22,761 | $19,000 | $3,761 |
| 31 | $28,069 | $22,600 | $5,469 |
| 32 | $33,748 | $26,200 | $7,548 |
| 33 | $39,824 | $29,800 | $10,024 |
| 34 | $46,326 | $33,400 | $12,926 |
| 35 | $53,283 | $37,000 | $16,283 |
| 36 | $60,727 | $40,600 | $20,127 |
| 37 | $68,691 | $44,200 | $24,491 |
| 38 | $77,214 | $47,800 | $29,414 |
| 39 | $86,333 | $51,400 | $34,933 |
| 40 | $96,090 | $55,000 | $41,090 |
| 41 | $106,531 | $58,600 | $47,931 |
| 42 | $117,702 | $62,200 | $55,502 |
| 43 | $129,655 | $65,800 | $63,855 |
| 44 | $142,445 | $69,400 | $73,045 |
| 45 | $156,131 | $73,000 | $83,131 |
| 46 | $170,774 | $76,600 | $94,174 |
| 47 | $186,442 | $80,200 | $106,242 |
| 48 | $203,207 | $83,800 | $119,407 |
| 49 | $221,146 | $87,400 | $133,746 |
| 50 | $240,340 | $91,000 | $149,340 |
| 51 | $260,878 | $94,600 | $166,278 |
| 52 | $282,853 | $98,200 | $184,653 |
| 53 | $306,367 | $101,800 | $204,567 |
| 54 | $331,527 | $105,400 | $226,127 |
| 55 | $358,448 | $109,000 | $249,448 |
| 56 | $387,253 | $112,600 | $274,653 |
| 57 | $418,075 | $116,200 | $301,875 |
| 58 | $451,055 | $119,800 | $331,255 |
| 59 | $486,343 | $123,400 | $362,943 |
| 60 | $524,101 | $127,000 | $397,101 |
| 61 | $564,502 | $130,600 | $433,902 |
| 62 | $607,731 | $134,200 | $473,531 |
| 63 | $653,986 | $137,800 | $516,186 |
| 64 | $703,479 | $141,400 | $562,079 |
| 65 | $756,437 | $145,000 | $611,437 |
These projections use your selected assumptions. Markets fluctuate and investments can lose value. Taxes, investment fees, and inflation can reduce actual results.
Assumptions matter
A different return, a different outcome.
Same contributions and time. Three hypothetical returns, not a probability forecast.
7%
$756,4379%
$1,297,181Start now. Or start later.
Starting earlier gives compounding more time. Starting later can still make a meaningful difference.
$756,437
Start at 25 · 40 years invested
- Contributed
- $145,000
- Growth / loss
- $611,437
$524,101
Start at 30 · 35 years invested
- Contributed
- $127,000
- Growth / loss
- $397,101
$358,448
Start at 35 · 30 years invested
- Contributed
- $109,000
- Growth / loss
- $249,448
Each comparison begins with the same starting balance and first monthly contribution. While waiting, that balance earns no modeled return and no contributions are made. Annual contribution increases begin when investing starts. Differences include both fewer contributions and less time for growth.
Starting now produces $397,989 more in projected ending value than waiting ten years under these assumptions.
One small change
What if I invested a little more?
Explore an increase you choose. Your core inputs stay the same.
$123,577 additional projected value at age 65. Your first monthly contribution becomes $350.00.
Keep a useful scenario
Save a scenario to revisit.
Calculator inputs stay on this page until you choose to save or download. Save a private hypothetical scenario to revisit and compare.
Sign in or create a free account, then return here to confirm saving. Your draft stays in this tab for up to 30 minutes.
You contribute. Returns can compound.
When investments grow, future returns can apply to earlier gains as well as to money you add. Losses can also compound. This model spreads one return assumption evenly across months; real markets do not behave that smoothly.
Time & contributions
More time means more periods for returns to compound. Consistent contributions add new principal. Neither time nor consistency removes investment risk.
Return methodology
Annual return is an effective yearly rate. Monthly rate = (1 + annual return / 100)^(1/12) − 1, so 7% means 7% growth over one year before contributions. Contributions arrive at month-end.
Inflation
Future-dollar balances are divided by (1 + annual inflation) raised to the number of years. This estimates purchasing power in today’s dollars. It is separate from the nominal investment value.
Goal calculation
We calculate growth from the starting balance, then solve the recurring contribution needed to fill the gap. Annual increases are included, and the first monthly contribution is rounded up to the next cent. A target already met under the model needs no additional contribution.
Risk, fees & taxes
These are smooth mathematical scenarios. Actual returns vary; capital can be lost. No taxes, investment fees, contribution limits, withdrawals, or individual circumstances are modeled. The tool does not recommend a security or account.
Rule of 72
As a rough shortcut, 72 ÷ 7% is about 10.3 years to double a lump sum. This is an approximation, works best with modest positive rates, and ignores additional contributions.
Educational references: Investor.gov compound interest calculator and savings goal calculator.