Half a million dollars sounds like a fortune until you divide it across a retirement that might last thirty years, at which point it can start to feel alarmingly finite. Two versions of the same worry drive the question: how long would $500,000 last if you spent it down, and could you instead live on just the interest and leave the principal untouched. The honest answers to both are more encouraging than the panic suggests, but they come with conditions. This guide from The Finance Reveal explains how long $500,000 lasts in retirement and whether you can live on its interest, part of our Retirement section. This is general education, not financial advice, and outcomes depend heavily on your spending, returns, and circumstances.

How Long $500,000 Lasts When You Spend It Down

The most useful starting point is the widely cited 4 percent guideline, which suggests that withdrawing about 4 percent of a portfolio in the first year, then adjusting for inflation, gives a high chance of the money lasting roughly 30 years. On $500,000, 4 percent is $20,000 in the first year, about $1,667 a month, drawn from your savings and expected to last around three decades if invested sensibly, the framework our guide to safe withdrawal rates and the 4 percent rule explains in full.

That $1,667 a month is the pivotal number, because it is almost never the whole story. Most retirees also receive Social Security, which averages around $2,000 a month, so $500,000 is frequently a supplement to guaranteed income rather than the sole source. Combined, that example produces roughly $3,600 a month, a very different picture from $1,667 alone. How long the $500,000 itself lasts then depends on three things: how much you withdraw, what your investments return, and how inflation behaves.

The table below shows how the withdrawal rate changes the rough lifespan of the money, holding sensible investment returns in the background.

The single biggest threat to these estimates is a market downturn in the early years, which forces you to sell more of a shrinking portfolio and can permanently shorten how long the money lasts, the danger our guide to sequence of returns risk describes. Inflation is the slower threat, steadily raising the dollar amount you must withdraw to buy the same things, which is why the 4 percent approach builds in annual increases and why our guide to inflation and retirement treats it as a central planning problem.

Can You Live on Just the Interest?

Living purely off the income your $500,000 generates, never touching the principal, is the more conservative dream, and whether it works depends entirely on the yield you can earn and how much you need to spend.

The arithmetic is simple. At a 4 percent yield, $500,000 produces about $20,000 a year without touching the principal. At a higher 5 percent, it produces $25,000. Those are real possibilities in a period of decent interest rates, using instruments like a certificate of deposit, a high-yield savings account, or bonds. So on paper, yes, you can generate $20,000 to $25,000 a year in interest and dividends alone.

The catch is twofold. First, whether that income is enough depends on your total budget: $20,000 a year is a modest income by itself, but combined with Social Security it can be comfortable in a low-cost situation. Second, and more subtly, living off interest does not protect you from inflation. If you spend all the interest every year and never let the principal grow, the purchasing power of both your income and your capital erodes over time, so the strategy that feels safest can quietly lose ground. Interest rates also fluctuate, so an income that works at today’s yields may shrink if rates fall.

For this reason, most planners favor a total-return approach, drawing a sustainable percentage from a diversified mix of stocks and bonds rather than chasing interest alone, since the growth from stocks helps the portfolio keep pace with inflation, the balance our guide to asset allocation describes. Living off interest is possible, but living off a well-managed total return is usually more durable.

Making $500,000 Work

The practical path combines both ideas with the rest of your finances. Count all your income sources first, since Social Security and any pension do much of the heavy lifting and reshape how much your $500,000 must provide, a full accounting our guide to how much you need to retire walks through. Keep a cash buffer of one to two years of expenses so you are not forced to sell investments during a downturn, an application of the emergency fund principle our guide to building an emergency fund covers. Stay invested for growth rather than holding everything in cash, so the portfolio can outpace inflation. And keep withdrawals flexible, trimming them in weak market years, which meaningfully extends how long the money lasts.

Whether $500,000 is enough is ultimately personal. For a retiree with modest expenses, a paid-off home, and solid Social Security, it can comfortably support a secure retirement. For someone with high spending and no other income, it may fall short. The number itself is neither large nor small until you set it against your own spending, income, and time horizon.

Frequently Asked Questions

How long will $500,000 last in retirement?

Using the 4 percent guideline, withdrawing about $20,000 a year, or $1,667 a month, $500,000 can last roughly 30 years in many scenarios if invested sensibly. Withdrawing more shortens that considerably: 5 percent often lasts 20 to 25 years, and 6 percent frequently under 20. The exact lifespan depends on your withdrawal rate, investment returns, and inflation, especially in the early years.

Can I live off the interest of $500,000?

Potentially. At a 4 to 5 percent yield, $500,000 can generate roughly $20,000 to $25,000 a year in interest without touching the principal. Whether that is enough depends on your total budget and other income like Social Security. The main drawback is inflation: if you spend all the interest each year, the purchasing power of both your income and your principal slowly erodes.

Is $500,000 enough to retire on?

It can be, depending on your spending and other income. Combined with Social Security, which averages around $2,000 a month, $500,000 drawn at 4 percent adds roughly $1,667 a month, for about $3,600 total in that example. For a retiree with modest expenses and a paid-off home, that can be comfortable; for someone with high spending and no other income, it may not be enough.

Is it better to spend down savings or live on interest?

Most planners favor a total-return approach, drawing a sustainable percentage from a diversified mix of stocks and bonds, over living on interest alone. The reason is inflation: an interest-only strategy that never grows the principal loses purchasing power over time, while a portfolio with some stock growth can keep pace. A flexible withdrawal from a balanced portfolio is usually more durable than chasing yield.

The Bottom Line

Whether $500,000 lasts through retirement, and whether you can live on its interest, both come down to the same variables: how much you spend, what your investments earn, and how inflation behaves. As a spend-down, the 4 percent guideline suggests drawing about $20,000 a year, or $1,667 a month, with a good chance of lasting around 30 years, though higher withdrawals shorten that quickly, with 5 percent often lasting 20 to 25 years and 6 percent frequently under 20. As an interest-only strategy, a 4 to 5 percent yield can generate roughly $20,000 to $25,000 a year without touching the principal, which is real but exposes you to inflation, since spending all the income each year lets the purchasing power of your capital slowly erode. The crucial context in both cases is that $500,000 is rarely the whole story. Social Security, averaging around $2,000 a month, usually does much of the work, turning a seemingly thin $1,667 into a more comfortable combined income. The biggest risks are a market downturn early in retirement and the slow grind of inflation, both of which a cash buffer, continued investment for growth, and flexible withdrawals help manage. Most planners prefer a total-return approach over living on interest alone, because the growth keeps pace with rising prices. Ultimately, $500,000 is neither large nor small in the abstract; it is enough or not enough only relative to your own spending, income, and time horizon. For related guides, see our articles on safe withdrawal rates and the 4 percent rule, sequence of returns risk, and asset allocation, and explore the full Retirement section. This is general information, not personalized financial advice; outcomes depend on your spending, returns, and circumstances.