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How Much Money Do I Need to Live Off of Interest?

With enough money in savings, you could theoretically live off of the interest, but is it a good idea?

Editor’s Note: This article originally mistakenly claimed that $50,000 was 4% of $1,000,000. It has been updated to reflect that $40,000 is 4% of $1,000,000. The Fool regrets the error.

If you have enough money in a savings account, it can be possible to live off the interest. Here’s how to determine how much you would need in the bank to do this, how much you can expect to save at your current rate, and another way of building a million-dollar nest egg that could be a better idea.

How much money do you need to live off the interest?

The answer to this question depends on a couple of variables — specifically, how much income you’ll need to live comfortably, and what interest rate you’re getting on savings.

Having said that, here’s a quick (but imperfect) calculation method. Simply take the amount of annual income you want, and divide it by the interest rate you expect to receive, expressed as a decimal. For example, if I need $40,000 per year to live comfortably, and expect to receive 4% interest on my savings, $40,000 divided by 0.04 shows that I’ll need $1,000,000 to live off my interest.

As I mentioned, though, this isn’t a perfect calculation. Specifically, it doesn’t account for inflation — in other words, if you’re 30, $50,000 today will not have nearly the same buying power when you’re ready to retire. And it doesn’t consider the fact that interest rates fluctuate over time, which can cause your income to fluctuate from year to year. Just take a look at how dramatically the Federal Funds Rate, which is a good predictor of savings account interest rate fluctuations, has changed over the past 20 years.

Effective Federal Funds Rate Chart

EFFECTIVE FEDERAL FUNDS RATE DATA BY YCHARTS.

How much interest will your savings produce?

As long as you understand the limitations of calculating how much money you’ll need to live off the interest, it can still be useful to have a long-term savings goal in mind, and to know whether or not you’re on track to achieve it.

With that in mind, here’s a calculator you can use to determine how much you could have in savings, given your current age, savings balance, savings rate, and interest rate. (Note: The calculator’s “before-tax return on savings” input is referring to your expected interest rate.)

 Saving regularly can help you achieve your future income goals. Use this calculator to determine how much income an existing balance and/or a regular savings plan can provide.

For example, let’s say your income goal is $50,000, and you expect to earn 4% on your savings. We’ll say that you currently have $100,000 in the bank, and that you’re 40 years old. If you’re saving at a rate of $10,000 per year and expect to increase this amount by 2% per year, you can expect to have $676,145 by the time you’re 65.

If you’re willing to use some of your principal as well, the calculator estimates that you’ll be able to withdraw an annual income of $34,496 per year for 30 years. Of course, this gives you the risk of running out of money, but it’s a common retirement strategy to withdraw a combination of interest and principal. The often-cited “4% rule” is a common example.

A better idea than living off of savings account interest

As a final thought, it’s generally a bad idea to keep significant sums of money in savings accounts. You can read a thorough discussion of why I say this here, but over time, savings accounts earn such low interest rates that they tend to not even keep up with inflation.

Consider the previous example of a $100,000 savings balance at age 40, and a savings rate of $10,000 per year. Instead, let’s assume you earn an 8% rate of return, which is actually conservative compared with the stock market’s historical performance. In this case, you’d end up with more than $1.1 million at age 65, and what’s more, you could reasonably expect to withdraw $82,222 per year for 30 years without running out of money, more than double what you could withdraw from a savings account, even assuming an optimistic 4% interest rate.

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If you’re like most Americans, you’re a few years (or more) behind on your retirement savings. But a handful of little-known “Social Security secrets” could help ensure a boost in your retirement income. For example: one easy trick could pay you as much as $16,122 more… each year! Once you learn how to maximize your Social Security benefits, we think you could retire confidently with the peace of mind we’re all after. Simply click here to discover how to learn more about these strategies.

The Motley Fool has a disclosure policy.

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Drew Limsky

Drew Limsky

Editor-in-Chief

BIOGRAPHY

Drew Limsky joined Lifestyle Media Group in August 2020 as Editor-in-Chief of South Florida Business & Wealth. His first issue of SFBW, October 2020, heralded a reimagined structure, with new content categories and a slew of fresh visual themes. “As sort of a cross between Forbes and Robb Report, with a dash of GQ and Vogue,” Limsky says, “SFBW reflects South Florida’s increasingly sophisticated and dynamic business and cultural landscape.”

Limsky, an avid traveler, swimmer and film buff who holds a law degree and Ph.D. from New York University, likes to say, “I’m a doctor, but I can’t operate—except on your brand.” He wrote his dissertation on the nonfiction work of Joan Didion. Prior to that, Limsky received his B.A. in English, summa cum laude, from Emory University and earned his M.A. in literature at American University in connection with a Masters Scholar Award fellowship.

Limsky came to SFBW at the apex of a storied career in journalism and publishing that includes six previous lead editorial roles, including for some of the world’s best-known brands. He served as global editor-in-chief of Lexus magazine, founding editor-in-chief of custom lifestyle magazines for Cadillac and Holland America Line, and was the founding editor-in-chief of Modern Luxury Interiors South Florida. He also was the executive editor for B2B magazines for Acura and Honda Financial Services, and he served as travel editor for Conde Nast. Magazines under Limsky’s editorship have garnered more than 75 industry awards.

He has also written for many of the country’s top newspapers and magazines, including The New York Times, Washington Post, Los Angeles Times, Miami Herald, Boston Globe, USA Today, Worth, Robb Report, Afar, Time Out New York, National Geographic Traveler, Men’s Journal, Ritz-Carlton, Elite Traveler, Florida Design, Metropolis and Architectural Digest Mexico. His other clients have included Four Seasons, Acqualina Resort & Residences, Yahoo!, American Airlines, Wynn, Douglas Elliman and Corcoran. As an adjunct assistant professor, Limsky has taught journalism, film and creative writing at the City University of New York, Pace University, American University and other colleges.