What annual return should I actually use?

No one can tell you the correct number, because future returns are unknown. This article shows 6%, 8%, and 10% specifically to illustrate a range, not because any one of them is more likely than the others. Try several assumptions in the calculator rather than anchoring on a single figure.

Do these numbers include dividends?

The assumed annual return in these examples is a single all-in growth figure — you decide whether it's meant to represent price growth alone or price growth plus reinvested dividends. For a projection that separates the two, see our dedicated VOO dividend calculator.

What if I already have savings to invest as a lump sum too?

You can combine an initial lump sum with ongoing monthly contributions — our VOO Investment Calculator supports both at once, so you don't have to model them separately.

Are these figures guaranteed?

No. Every number in this article is a hypothetical projection based on a stated assumption, calculated with standard compound-growth math. VOO's actual future returns are unknown and could be higher or lower than any example shown here, including negative in a given year.

Why does the outcome change so much between 6% and 10%?

Because the difference compounds every year for decades. A gap that looks small annually turns into a large gap in the final total the longer the money stays invested — which is exactly why the return assumption you choose matters more than it might seem at first.

How Much Could $500 a Month in VOO Become?

There's no single answer — it depends on your time horizon and return assumption. Here's how to think about it, with worked examples you can check yourself.

Written by VOO Calculator TeamPublished September 14, 20264 min read

In this article

The quick answer
What actually changes the outcome
Example scenarios
Why small changes matter so much
What about dividends?

It's one of the most common questions people ask before they start investing, and the honest answer is: it depends — mainly on how long the money stays invested and what return you assume along the way. Rather than give you one made-up number, this article walks through how to think about the question, with worked examples you can check yourself.

The quick answer

Nobody can tell you what $500 a month in VOO will actually become, because nobody knows VOO's future returns. What we can do is show you the math for a range of reasonable assumptions, so you can see how the outcome shifts with time horizon and return — then plug in your own numbers in the VOO calculator to explore further.

What actually changes the outcome

Three things determine the result far more than anything else:

Time horizon. The number of years the money stays invested and compounding.
Assumed annual return. A number you choose, not a guarantee — small differences here add up enormously over long periods.
Consistency. Whether the $500 actually gets invested every month, without long gaps.

Example scenarios

The table below shows $500 invested every month, with no starting lump sum, at three different assumed annual returns — 6%, 8%, and 10% — compounded monthly. These are illustrative assumptions, not a prediction of VOO's actual future return, which is unknown and could turn out higher, lower, or negative in any given year.

Time horizon	Total contributed	At 6% assumed return	At 8% assumed return	At 10% assumed return
10 years	$60,000	$81,940	$91,473	$102,422
20 years	$120,000	$231,020	$294,510	$379,684
30 years	$180,000	$502,258	$745,180	$1,130,244

These figures come from the same compound-growth formula used throughout this site — see the methodology page for the exact math. You can reproduce or adjust any of these scenarios directly in the calculator below.

Run this scenario with your own numbers

Change the monthly amount, time horizon, or return assumption and see the result update instantly, with a year-by-year breakdown.

Open the VOO Calculator

Why small changes matter so much

Notice how much the 30-year column changes between a 6% and 10% assumption — more than double, even though the gap between the two rates looks modest on paper. That's the nature of compounding: differences in the rate don't just add up, they multiply against an ever-larger balance each year. It's also why nobody can responsibly promise you a specific dollar figure for what your own $500 a month will become — the assumption you use has an outsized effect on the projection.

What about dividends?

The figures above use a single all-in return assumption — it's up to you whether you think of that number as price growth alone or price growth plus reinvested dividends. If you'd rather model dividend income on its own, separately from price appreciation, use our VOO dividend calculator, which lets you set a dividend yield and growth rate independently and choose whether dividends are reinvested or taken as cash.

Related Calculators

VOO Calculator

Run this exact scenario with your own numbers.

VOO Investment Calculator

Add a starting lump sum on top of your monthly contribution.

VOO Dividend Calculator

See a separate estimate for dividend income specifically.

Frequently Asked Questions

There's no universal "good" amount — it depends entirely on your own budget, other financial priorities, and goals. $500 is simply a common example because it's a round, relatable number. The math in this article works the same way at $50 or $5,000 a month; only the scale changes.

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