Millionaire Calculator
Plan both directions: see when your current pace reaches a million, or choose a deadline and calculate the monthly contribution it requires. Change the target for any wealth milestone.
- Starting balance
- $25,000
- Total contributed
- $333,000
- Growth at the target
- $673,774
- Time to target
- 25 yrs 8 mos
Adding $1,000 a month at 7.0%, you'd hit $1,000,000 in 25 yrs 8 mos — and roughly $673,774 of the balance is growth, not contributions.
This uses end-of-month contributions and a constant nominal return. It excludes taxes, fees, inflation and market volatility.
Use Left and Right Arrow, Home, or End to inspect data points.
Estimates only — not financial advice. They produce estimates based on the figures you enter and do not account for every fee, tax or change in rate.
- The result is a deterministic estimate from the inputs shown on this page.
- Fees, taxes and real-world terms not represented by an input are excluded.
- Confirm material decisions against original documents or a qualified professional.
The email includes this route only; calculator inputs are not attached.
How long a million actually takes
The arithmetic is less intimidating than the number. At a 7% average annual return, $500 a month reaches $1 million in about 36 years, $1,000 a month in about 27, and $2,000 a month in about 20. Start with $100,000 already invested and $1,000 a month gets there in roughly 21 years.
The variable people underestimate is time, not contribution. Doubling the monthly contribution cuts around nine years off the timeline; adding ten years to the horizon can do more than doubling the contribution, because the last decade is where compounding does most of its work.
The last decade does most of the lifting
On a 30-year path to $1 million, roughly half the final balance is typically created in the last seven or eight years. That is not a quirk of the assumptions — it is what exponential growth looks like from the inside.
It has two practical implications. Stopping five years early costs far more than the five years of contributions you skipped. And the middle years, when the balance seems to crawl despite steady contributions, are the ones where people quit — precisely when quitting is most expensive.
What return to assume
The long-run US large-cap average is around 10% nominal and roughly 7% after inflation. Use 7% if you want the answer in today's purchasing power, which is usually the honest framing — $1 million in 2056 will not buy what $1 million buys now.
Whatever you assume, remember the average is not the experience. Real sequences include years down 20% or more and years up 30%, and the order they arrive in matters enormously if you are also withdrawing. A steady-return projection is a planning tool, not a forecast.
Fees and taxes are the silent variables
A 1% annual fee sounds trivial and is not. On a 30-year path to $1 million it typically costs $150,000–$200,000 of final balance, because the fee compounds against you exactly as returns compound for you. Index funds at 0.03–0.10% versus an actively managed fund at 1% is one of the few decisions available that is nearly free to make and very large in effect.
Account location matters similarly. A 401(k) or IRA shelters growth entirely; a taxable brokerage account pays tax on dividends every year and capital gains at sale. Fill tax-advantaged space first — and capture any employer match before anything else, because that is a 50–100% instant return no market will offer you.
What a million is actually worth
At the traditional 4% withdrawal rule, $1 million supports roughly $40,000 a year in the first year of retirement, adjusted upward for inflation thereafter. That is a comfortable supplement to Social Security and a thin sole income.
Inflation also moves the target. At 3% a year, $1 million in 30 years has the purchasing power of about $412,000 today. Setting the goal in real terms — or simply asking what annual income you need and multiplying by 25 — produces a more useful number than a round million.