For decades, "$1 million" has been shorthand for "rich enough to retire." But the honest answer to how long it actually lasts is this: it depends almost entirely on how much you spend, what else you have coming in, and how your investments behave in the first few years of retirement.
Two people can both retire with exactly $1 million and have wildly different outcomes — one runs out at 78, the other leaves money to their grandkids. Let's replace the guesswork with real numbers.
Updated June 2026. Examples use 2026 tax brackets and Social Security figures.
The Simple (and Misleading) Math
If you kept $1 million in cash — no growth, no inflation, no taxes — here's how long it would last at different spending levels:
| Annual spending | Years $1M lasts (cash, no growth) |
|---|---|
| $40,000 | 25.0 years |
| $50,000 | 20.0 years |
| $60,000 | 16.7 years |
| $80,000 | 12.5 years |
| $100,000 | 10.0 years |
This is easy to calculate and wrong in both directions, because it ignores two powerful forces that pull the answer in opposite ways:
- Investment growth extends your money. A balanced portfolio has historically earned more than inflation over long periods, so your balance keeps working even while you spend from it.
- Inflation shrinks your money. A $60,000 lifestyle today costs roughly $81,000 in 15 years at 2% inflation — and about $93,000 at 3%. Your spending number is a moving target.
Why this matters: The single biggest mistake we see is planning around a cash number ("$1M ÷ my spending"). Real retirements involve growth, inflation, taxes, and Social Security all interacting at once — which is exactly what a Monte Carlo simulation is built to handle.
The 4% Rule Lens
The most-cited rule of thumb is the 4% rule, derived from William Bengen's 1994 research and the Trinity Study. It says you can withdraw 4% of your starting balance in year one, adjust that dollar amount for inflation each year, and have a high historical probability of your money lasting 30 years.
For $1 million, that's $40,000 in the first year, rising with inflation after that. Across the historical scenarios these studies examined, a balanced portfolio survived 30 years the vast majority of the time at this rate.
The catch: the 4% rule assumes a 30-year horizon and a specific stock/bond mix. Retire at 55 and plan for 40 years, and a more conservative 3% to 3.5% start is safer. We break this down in The 4% Rule Explained.
A Realistic Example: The Millers
Numbers in a vacuum don't help. Here's a typical pre-retiree couple.
- Portfolio: $1,000,000
- Combined Social Security: ~$40,000/year (starting at full retirement age)
- Desired spending: $70,000/year
- Filing status: Married, retiring at 65
Ready to plan your retirement?
Use RetirePro's free calculators to model your retirement income.
Start Free Plan →Here's the key move most simple calculators miss: their portfolio doesn't have to cover the whole $70,000. Social Security covers $40,000, so the portfolio only needs to fund the $30,000 gap.
That's a 3% withdrawal on $1 million ($30,000 ÷ $1,000,000). At that rate, with a balanced portfolio, the Millers' money has historically lasted well beyond 30 years — and likely grows. The $1 million isn't "10 years of $70,000 spending." Paired with Social Security, it's a 30+ year plan.
Change one input and it flips: if they spend $90,000/year, the gap jumps to $50,000 — a 5% withdrawal that carries a meaningfully higher risk of running short over a long retirement.
The Five Factors That Decide the Answer
| Factor | Makes $1M last longer | Makes $1M run out faster |
|---|---|---|
| Spending | Lower, flexible spending | High, fixed spending |
| Social Security | Claiming later, two earners | Claiming early, single income |
| Withdrawal rate | 3–4% start | 5%+ start |
| Market sequence | Strong early returns | A crash in years 1–5 |
| Taxes | Roth + tax-smart withdrawals | Large pre-tax RMDs in high brackets |
The market-sequence factor deserves special attention. Sequence-of-returns risk means a downturn in your first few years of retirement does far more damage than the same downturn 15 years later — because you're selling shares at depressed prices to fund spending. Two retirees with identical average returns can have opposite outcomes purely based on the order those returns arrive.
This is precisely why an average-return calculator can be dangerously optimistic, and why probability matters more than a single projection.
How to Actually Answer It: Run the Probabilities
Instead of one number, a proper retirement model asks: across 1,000 possible market futures, in what percentage does my money outlast me?
That's what RetirePro's Monte Carlo simulation does. It runs 1,000 scenarios against your real inputs — portfolio, spending, Social Security timing, inflation, and taxes — and reports your probability of success rather than a single, falsely precise figure.
A rough historical guide for a balanced portfolio over a 30-year retirement:
| Starting withdrawal rate | First-year income on $1M | Historical track record (30 yrs) |
|---|---|---|
| 3.0% | $30,000 | Very high success; balance often grows |
| 3.5% | $35,000 | High success across most periods |
| 4.0% | $40,000 | The classic "safe" rate for ~30 years |
| 5.0% | $50,000 | Elevated risk over long retirements |
| 6.0%+ | $60,000+ | High risk of depletion |
Use these as a starting point, then run your own numbers — your Social Security, taxes, and time horizon move the answer more than any rule of thumb.
Five Ways to Make $1 Million Last Longer
- Delay Social Security. Every year you wait from 62 to 70 increases your benefit by roughly 8% per year past full retirement age — guaranteed, inflation-adjusted income that reduces how much your portfolio must carry. See the best age to claim.
- Withdraw tax-efficiently. The order you tap accounts (taxable, then tax-deferred, then Roth — or a blend) can save tens of thousands in lifetime taxes. See withdrawal strategies.
- Stay flexible. Trimming spending modestly in down-market years dramatically improves longevity — far more than picking "perfect" investments.
- Mind investment fees. A 1% annual fee can quietly consume years of portfolio life. Low-cost index funds keep more of your return working for you.
- Keep some growth. An all-cash or all-bond portfolio feels safe but often loses to inflation over a 30-year retirement. A sensible stock allocation is what makes the money grow while you spend it.
Frequently Asked Questions
Is $1 million enough to retire? For many households, yes — especially paired with Social Security. If you spend $60,000/year and receive $30,000 in Social Security, your portfolio only needs to cover a $30,000 gap, which is a sustainable 3% withdrawal on $1 million. If you spend $100,000/year with the same Social Security, $1 million is likely not enough on its own. Run your specific numbers to know for sure.
How long will $1 million last at $50,000 a year? On a cash basis, 20 years. But with investment growth, a $50,000 inflation-adjusted withdrawal (5% of $1M) carries real depletion risk over a 30-year retirement. Add Social Security to shrink the portfolio's share of that $50,000, and the odds improve substantially.
Does the 4% rule still work in 2026? It remains a reasonable starting point for a ~30-year retirement with a balanced portfolio. For early retirees planning 40+ years, a 3% to 3.5% start is more prudent. The rule is a guideline, not a guarantee — your real answer depends on sequence risk, taxes, and other income.
What's the safest way to test my own plan? Model it across many market outcomes, not one average. A Monte Carlo simulation shows your probability of success and reveals whether a bad first decade would sink your plan.
Want to know exactly how long your money will last? RetirePro runs 1,000 Monte Carlo scenarios on your real portfolio, spending, Social Security, and tax situation — then shows your probability of success and the year-by-year picture. Start free with a results summary, or unlock the full breakdown with Pro. See how long your savings will last →
Also explore our retirement calculator and Social Security optimizer to fine-tune the two inputs that move the answer most.