Reaching $1 million is a function of time and return, not luck. At a 7% annual return — a common long-run planning assumption for a diversified investment portfolio — $2,000 a month reaches $1 million in about 22 years. $1,000/month takes about 30 years. $500/month takes about 40 years.
This calculator uses 7% as the default rate because a million-dollar goal over decades almost always implies investing, not a savings account. Adjust the rate to 4–5% if your money will stay in cash savings; use 6–8% for a broadly diversified portfolio of stocks.
Why the growth curve bends upward
The chart below the result shows a curve that bends sharply upward over time. In the first decade, your contributions are the dominant force. By the second decade, the compounding interest on your existing balance begins to outpace what you add each month. In the final years, a single month of investment growth can exceed your monthly contribution by a wide margin.
This is the core argument for starting early. Every year of compound returns in the early period is worth dramatically more than the same returns in the later period, because early returns compound on top of each other for decades.
The rate of return matters more than the contribution on this timeline
Over a 30-year horizon, the difference between a 6% and 8% annual return on a consistent monthly contribution is enormous. With $1,000/month at 6%, you reach $1 million in about 35 years. At 8%, it drops to about 26 years — a full 9-year difference from a 2% rate improvement.
This is why investing in low-cost, broadly diversified index funds matters so much for long-term millionaire goals. Minimizing fees (which reduce your effective return) and maintaining diversification (which sustains long-run returns) are the two highest-leverage choices on a decades-long plan.
Frequently asked questions
How long does it take to save $1 million?
At $1,000/month with 7% annual return: about 30 years. At $2,000/month: about 22 years. At $3,000/month: about 17 years. With a $50,000 starting balance and $1,000/month at 7%: about 25 years. Enter your real numbers above.
What return should I use for a $1 million savings goal?
If the money will be invested in a broadly diversified stock index fund, 6–8% before inflation is a common long-run planning range. For a HYSA, use 4–5%. Be honest about your actual investment strategy — using an optimistic return makes the timeline look shorter than it will be.
Is $1 million enough to retire?
The 4% withdrawal rule suggests $1 million supports about $40,000/year in withdrawals with a high probability of lasting 30+ years. Whether that is enough depends on your expected Social Security income, retirement age, and spending needs. The retirement calculator on this site can model your specific scenario.
How do I save $1 million on an average salary?
The key is starting early and staying consistent. $500/month invested in a diversified index fund at 7% from age 25 reaches $1 million by approximately age 65. Increasing contributions as income grows, avoiding lifestyle inflation, and not withdrawing during market dips all dramatically accelerate the timeline.
Worked examples
Each scenario below is computed by the same engine that powers the calculator above — not hand-estimated. Change the inputs above to see how your own numbers compare.
$1,500/month at 7% — an accelerated long-run plan
$1,500/month invested at 7% annual return from $0 — faster than the median retirement scenario.
- Goal amount
- $1,000,000
- Monthly savings
- $1,500
- Annual rate
- 7.0%
- Total contributed
- $409,500
- Interest earned
- $591,642
At 7%, $1,500/month reaches $1 million in roughly 22 years. In the final 5 years, a single year's investment growth exceeds your annual contributions — the exponential phase arrives earlier than most savers expect.
$2,000/month at 7% with a $30,000 starting balance
A mid-career saver with $30,000 invested and $2,000/month going forward at 7%.
- Goal amount
- $1,000,000
- Monthly savings
- $2,000
- Starting balance
- $30,000
- Annual rate
- 7.0%
- Total contributed
- $472,000
- Interest earned
- $533,465
The $30,000 already invested earns compound returns for the full remaining timeline. Mid-career savers with existing balances often find their timeline to $1 million is shorter than they expected.
Months to $1 million at various monthly savings rates and annual returns
Time to reach $1,000,000 from $0. Rows show monthly savings; columns show annual return (investment returns, not HYSA rates).
| Monthly savings | 5% | 6% | 7.0% | 8% |
|---|---|---|---|---|
| $500/mo | 44 yr 10 mo | 40 yr 1 mo | 36 yr 5 mo | 33 yr 5 mo |
| $1,000/mo | 32 yr 11 mo | 30 yr | 27 yr 7 mo | 25 yr 7 mo |
| $1,500/mo | 26 yr 8 mo | 24 yr 6 mo | 22 yr 9 mo | 21 yr 4 mo |
| $2,000/mo | 22 yr 7 mo | 21 yr | 19 yr 7 mo | 18 yr 5 mo |
| $3,000/mo | 17 yr 6 mo | 16 yr 5 mo | 15 yr 6 mo | 14 yr 9 mo |
A 5–8% annual return assumes a broadly diversified investment portfolio (not a savings account). For a HYSA at 4–5%, the $1 million timeline is considerably longer.
What affects your results
These are the real inputs that move the needle — ranked by how much each one changes your outcome. All rates in this calculator are user-supplied; this tool does not access live market data.
Over 20–30 years, the difference between 6% and 8% annual return can shift the $1 million timeline by 10+ years. The rate dominates everything else on very long horizons.
Doubling contributions from $1,000 to $2,000/month cuts the timeline from 30 to 22 years at 7%. Contribution is the dominant driver in the early decades.
Any existing invested balance earns compound returns for decades. $30,000 at age 30 at 7% grows to about $430,000 by age 65 — with no additional contributions.
Common mistakes to avoid
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Using a savings account rate (4–5%) for a $1 million goal over decades. At 4.5% in a HYSA, $1,000/month takes about 53 years. For a million-dollar goal over 20–30 years, an investment portfolio at 6–8% is the intended vehicle.
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Stopping contributions during market downturns. Bear markets are when each dollar buys more shares — continuing contributions during corrections is one of the highest-ROI behaviors available to long-term investors.
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Assuming $1 million is the retirement finish line. At a 4% withdrawal rate, $1 million supports ~$40,000/year. Whether that covers your retirement depends on your other income sources and expected spending.
Key takeaways
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The most powerful move is starting earlier, not saving more. $500/month from age 25 at 7% reaches $1 million by age 57. Starting at 35 with the same amount only reaches about $505,000 by 57 — half, with the same monthly cost.
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Increase contributions with every raise before the new income becomes spending. $100/month extra per raise, applied consistently over a career, can add years of acceleration to a million-dollar timeline.
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Use the retirement calculator on this site for a full retirement income model — including Social Security, drawdown, and spending projections beyond the $1 million threshold.
More questions answered
How long does it take to save $1 million?
At $1,000/month with 7% annual return: about 30 years. At $2,000/month: about 22 years. At $3,000/month: about 17 years. With $50,000 already invested at 7% and $1,000/month: about 25 years. Enter your actual numbers above.
What return rate is realistic for saving $1 million?
For a broadly diversified stock index fund (e.g., a US total market ETF), 6–8% before inflation is a commonly used long-run planning assumption. For a HYSA, use 4–5% but note the much longer timeline. Be honest about your actual investment strategy — entering 10% when your money sits in cash gives false comfort.
Should I save $1 million or invest?
For a 20–30 year million-dollar goal, you need to invest — not just save. Keeping $1 million in cash savings at 4–5% is financially feasible but takes decades longer than a diversified portfolio. A HYSA is right for emergency funds and short-term goals; a diversified investment portfolio is right for a decades-long wealth goal.
How do I save $1 million on an average income?
Start early and invest consistently. $500/month in a diversified index fund from age 25 at 7% average return reaches $1 million by approximately age 57. The key inputs: start as early as possible, automate the contribution, invest in low-cost index funds, and do not withdraw during downturns.