How Long Will $1 Million Last in Retirement?

The Simple Math: Withdrawal Rate Determines Everything

The longevity of any retirement portfolio comes down to one core variable: the withdrawal rate. How much you take out each year, relative to the portfolio's starting balance, determines whether it lasts 15 years or 40.

Here's a straightforward scenario breakdown for a $1,000,000 portfolio earning 5% annually (net of fees, pre-inflation) with inflation-adjusted withdrawals:

Note: Duration estimates assume 5% annual nominal returns, 2.5% inflation, and inflation-adjusted withdrawals. Sequence of returns risk can significantly reduce actual duration in bad-market scenarios.

The Social Security Factor: A Game Changer

The above scenarios assume your entire income comes from the $1 million portfolio. But most retirees also receive Social Security — and that changes the math dramatically.

If you receive $2,000/month ($24,000/year) from Social Security, you only need your portfolio to cover the remaining spending. At $60,000/year total spending minus $24,000 Social Security = only $36,000/year from the portfolio. That's a 3.6% withdrawal rate from $1 million — very sustainable over 30+ years.

A married couple with two Social Security benefits ($3,500–$5,000/month combined at full retirement age) on a $1 million portfolio could potentially live very comfortably with minimal portfolio drawdown — especially in early retirement years before Required Minimum Distributions kick in.

Geographic Scenarios: Where You Retire Matters Enormously

$1 million is a very different story depending on your zip code — or country code:

High-Cost Metro (NYC, San Francisco, Boston)

A comfortable retirement in a major metro typically costs $80,000–$100,000/year. At $90,000 annual spending from the portfolio, that's a 9% withdrawal rate — $1 million would last roughly 12–14 years. Social Security helps, but a $1M portfolio alone is tight in expensive cities. This is the main reason so many people relocate at retirement.

Average U.S. City (Phoenix, Denver, Charlotte)

Comfortable retirement spending in mid-tier cities is $55,000–$70,000/year. With Social Security of $20,000–$25,000/year, your portfolio needs to cover $30,000–$45,000 annually — a 3–4.5% withdrawal rate. At this level, $1 million becomes a genuinely solid retirement foundation.

Low-Cost U.S. Areas (Rural Midwest, Southeast, Appalachia)

In lower-cost areas, a couple can live well on $40,000–$50,000/year. With Social Security, portfolio withdrawals might be $15,000–$25,000/year — a 1.5–2.5% withdrawal rate. $1 million would theoretically last indefinitely at this level, since investment returns would likely exceed withdrawals.

Retiring Abroad (Portugal, Mexico, Thailand, Colombia)

This is where $1 million becomes genuinely life-changing. Popular expat retirement destinations offer a comfortable lifestyle for $25,000–$35,000/year, sometimes less. Combined with even a modest Social Security benefit, portfolio withdrawals could be minimal — and $1 million would last well beyond any realistic life expectancy. Many retirees in affordable countries find their net worth grows in retirement rather than shrinks.

The Monte Carlo Reality: Uncertainty Is the Point

The table above uses deterministic math — assumes a steady 5% return every year. But real markets don't work that way. They're volatile, and the sequence in which returns arrive matters enormously for portfolio longevity.

Monte Carlo simulation addresses this by running thousands of random return scenarios to calculate the probability your portfolio survives. Key findings from Monte Carlo analysis of a $1M portfolio:

• At 3% withdrawal (~$30K/year): 95%+ probability of success over 40 years in most models.
• At 4% withdrawal (~$40K/year): 85–95% probability over 30 years — widely cited as "safe."
• At 5% withdrawal (~$50K/year): 70–80% probability over 30 years — risky for a long retirement.
• At 6%+ withdrawal: Probability drops below 60% — portfolio failure becomes more likely than not in many scenarios.

The difference between "probably fine" and "risky" is often just one spending decision or one strategic choice (like delaying Social Security by 3 years).

What You Can Do If $1 Million Isn't Enough

If your analysis shows $1 million won't fund your desired retirement, you have several levers:

• Reduce spending. The most direct lever. Trimming $5,000/year from annual spending extends a $1M portfolio by 2–4 years at typical withdrawal rates.
• Work part-time in early retirement. Even $10,000–$15,000/year in part-time income dramatically reduces portfolio draw. It also keeps you engaged and delays the point at which you fully rely on savings.
• Delay Social Security. Every year you delay from 62 to 70 increases your monthly benefit by roughly 8%/year. Waiting from 65 to 70 increases benefits by ~40%.
• Relocate to lower-cost area. As discussed, this can cut required portfolio withdrawals by 30–50%.
• Consider an annuity for baseline income. Converting a portion of your portfolio ($200K–$300K) to a lifetime annuity provides guaranteed income regardless of market performance, reducing the pressure on the remaining portfolio.
• Keep working 2–3 more years. Each additional year of work adds contributions, subtracts a year from the retirement horizon, and allows more compounding.

Related guides: The 4% Rule Explained | Retirement Withdrawal Strategies