How Long Does It Take to Reach $100k, $500k, and $1M?

If you invest consistently each month, major financial milestones can arrive faster than they seem — but only if you understand how compounding and time work together.

A lot of people want to know whether investing $500, $1,000, or $1,500 per month is enough to reach six or seven figures. The answer depends on your time horizon, your expected return, and how consistently you keep contributing.

Use the calculator below to estimate your own timeline, then compare it with realistic examples for reaching $100,000, $500,000, and $1 million.

Want the standalone tool version? Open the full investment goal calculator →

Example timelines

Here are a few rough benchmark scenarios using a 7% annual return:

• $500 per month can often reach $100,000 in about 10 to 11 years
• $1,000 per month can often reach $500,000 in about 18 to 20 years
• $1,500 per month can often reach $1 million in about 22 to 25 years

These are not guarantees, but they show how consistent investing can build momentum over time. You can plug in your own numbers above to test a more specific scenario.

Why time matters more than most people think

Early on, your progress comes mostly from contributions. Later, the balance starts doing more of the work for you. That is the point where compounding becomes obvious.

This is why someone who starts earlier with a smaller amount can sometimes end up ahead of someone who starts later with a larger monthly contribution. Time gives your returns more room to accumulate on top of previous gains.

$100k is often the first major turning point

The first $100,000 matters because it is usually the point where investment growth begins to feel more visible. Before that, progress can feel slow and contribution-heavy. After that, compounding starts to contribute a more noticeable share of the growth.

That is one reason many investors focus on the first six-figure milestone. It is not just a psychological benchmark — it often marks the transition from “mostly saving” to “saving plus accelerating growth.”

What changes when you aim for $500k or $1M?

As the goal gets larger, small differences in contribution size and return assumptions matter more. Increasing your monthly investment by a few hundred dollars can shorten the timeline by years. The same is true of starting earlier.

Reaching $1 million usually is not about finding a perfect stock or timing the market. It is more often the result of a simple system repeated for a long time: steady contributions, patience, and allowing compounding to do its work.

What to take away

If you want to reach a large investing milestone, consistency matters more than intensity. Monthly contributions that feel modest can grow into meaningful amounts over time.

The most important thing is to make the process concrete. Test your own target amount, monthly contribution, and expected return above so you can see what your timeline actually looks like.

Frequently asked questions

How long does it take to reach $100,000 by investing every month?

It depends on your monthly contribution and expected return. At $500 per month and 7% annual growth, reaching $100,000 often takes around 10 to 11 years.

What matters more: contribution amount or rate of return?

Both matter, but for most people the biggest driver early on is consistent monthly contribution. Over longer periods, compounding and return assumptions become more important.

Is reaching $1 million realistic with monthly investing?

Yes, it can be realistic over a long enough time horizon. The timeline depends on how much you invest each month, your return assumptions, and how early you start.

Does this calculator guarantee investment results?

No. It provides estimates based on a fixed rate of return and steady contributions. Real-world investment performance can vary.

Explore more financial tools

Want to see long-term investment growth with an initial balance and ongoing monthly contributions? Try our compound interest calculator.

Prefer the standalone version of this tool? Use the investment goal calculator.