VOO Investment Calculator
Estimate how your VOO investment could grow over time. Enter an initial amount, a monthly contribution, a time horizon, and a return assumption to see a projection.
Your investment
This is an assumption you choose, not a guaranteed VOO return. Try different values to see how they affect the projection.
Estimated future value
$300,851
Based on a 7.00% assumed annual return over 20 years. This is a projection, not a guarantee.
Total contributions
$130,000
Estimated investment growth
$170,851
Estimated total return
131.42%
- Initial investment
- $10,000
- Total monthly contributions
- $120,000
- Investment period
- 20 years
- Assumed annual return
- 7.00%
Year-by-year breakdown
| Year | Starting balance | Contributions | Investment growth | Ending balance |
|---|---|---|---|---|
| 1 | $0 | $16,000 | $919 | $16,919 |
| 2 | $16,919 | $6,000 | $1,419 | $24,339 |
| 3 | $24,339 | $6,000 | $1,956 | $32,294 |
| 4 | $32,294 | $6,000 | $2,531 | $40,825 |
| 5 | $40,825 | $6,000 | $3,148 | $49,973 |
| 10 | $93,671 | $6,000 | $6,968 | $106,639 |
| 15 | $168,587 | $6,000 | $12,383 | $186,971 |
| 20 | $274,790 | $6,000 | $20,061 | $300,851 |
What this result means
The estimated future value above combines two things: the money you put in (contributions) and the growth that compounding could add on top, if VOO's returns match the percentage you assumed. The calculator does not know what VOO will actually return in the future — no calculator can. Instead, it shows you the mathematical result of a given assumption, so you can compare scenarios like "what if returns are lower" or "what if I contribute more."
How the VOO calculator works
The calculator uses standard compound-growth formulas, applied monthly. Your initial investment grows at the assumed annual return, compounded monthly, and each monthly contribution is assumed to be invested on a regular schedule and to grow for the remaining time in the plan.
For the full formulas, rounding rules, and assumptions, see our methodology page, or read how to calculate VOO returns for a step-by-step walkthrough.
VOO investment examples
A few common scenarios, calculated at a 7% assumed annual return. Change the numbers in the calculator above to match your own plan.
$100/month for 10 years
$17,308
- Total contributions
- $12,000
- Estimated growth
- $5,308
Assumes a 7% annual return — a chosen assumption, not a historical or guaranteed VOO return.
$500/month for 20 years
$260,463
- Total contributions
- $120,000
- Estimated growth
- $140,463
Assumes a 7% annual return — a chosen assumption, not a historical or guaranteed VOO return.
$1,000/month for 20 years
$520,927
- Total contributions
- $240,000
- Estimated growth
- $280,927
Assumes a 7% annual return — a chosen assumption, not a historical or guaranteed VOO return.
$1,000/month for 30 years
$1,219,971
- Total contributions
- $360,000
- Estimated growth
- $859,971
Assumes a 7% annual return — a chosen assumption, not a historical or guaranteed VOO return.
What is VOO?
VOO is the Vanguard S&P 500 ETF, a fund that tracks the S&P 500 index — a collection of roughly 500 large U.S. companies. When you invest in VOO, you're buying exposure to that whole index rather than picking individual stocks.
Read the full explanation of what VOO isVOO vs other ETFs
VOO is one of several funds that track the S&P 500 or similar large-cap indexes. See how it compares on structure, cost, and what each fund tracks.
Frequently asked questions
This is an educational calculator, not financial advice.
Results shown are estimated future values based on the return assumption you enter — they are not predictions and VOO is not guaranteed to achieve any particular return. Past performance of the S&P 500 or any fund does not guarantee future results. Consider speaking with a licensed financial professional before making investment decisions.