Here's What Happens When Your Emergency Fund Is Too Big
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You've probably seen the headline: over one third of Americans can't cover a $400 emergency with cash or its equivalent. It's true, and it's a real problem.
But there's a flip side nobody talks about -- hoarding too much cash has its own financial cost.
I learned this firsthand. For years, I kept a large cash reserve (over $60K) because I owned several rental properties. I needed liquid funds set aside for all types of costly disasters that could pop up.
But watching that money sit idle, year after year, always bothered me. If it had been invested instead, it would have grown significantly. That's called cash drag -- and it's more damaging than most people realize.
Here's what happens when your emergency fund gets too big, and how to fix it.
Cash drag can kill your long-term growth
An emergency fund in a savings account earns a fraction of what invested money can earn over time. The S&P 500 has returned close to 10% annually on average over the last 50 years.
Right now, the best high-yield savings accounts are paying around 4.00% APY -- which actually clears the historical inflation average of 3.2%. That's a decent deal, and worth taking advantage of while it lasts.
But rates don't stay this high forever. And if your emergency fund is sitting in a traditional checking account earning 0.05% or less, you're losing purchasing power every single year. And the more cash you hold beyond what you actually need, the more you lose in real terms.
This is cash drag. Excess money isn't working as hard as it could be.
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How much should you actually keep in savings?
The general rule of thumb for emergency funds is three to six months of living expenses. That's a good target for most people.
Here's a quick guide at different monthly spending levels:
| Monthly Spending | 3-Month Fund | 6-Month Fund |
|---|---|---|
| $3,000 | $9,000 | $18,000 |
| $5,000 | $15,000 | $30,000 |
| $7,000 | $21,000 | $42,000 |
Where you land in that range kind of depends on your situation and how comfortable you are with risk.
If you're a single-income household, or you work in a volatile industry like tech, media, or real estate, you might lean toward the six-month end. And if you've got a lot of dependents or irregular expenses, it's smart to pad it a little more.
But if you and your partner both have stable jobs and reliable income, three months is probably plenty.
If your cash savings is well above the six-month mark and you don't have a specific reason for it, that excess cash could be doing a lot more for you.
Where to put the excess cash
Once you've got your emergency fund saved, the next step is figuring out where the extra goes.
Personally, I invest all my long-term money into broad stock market index funds. I don't plan on touching that money for decades. There will be ups and downs in the stock market, but the long-term track record is hard to argue with. Near 10% average annual returns over half a century is a powerful thing to have working in your favor.
If you're newer to investing or want to ease in, here are a few reasonable options to consider depending on your goals:
- Taxable brokerage account -- They are flexible, have no contribution limits, and are great for long-term wealth building.
- Roth or traditional IRA -- Tax-advantaged accounts, giving you a bit more flexibility for withdrawals in retirement.
- 401(k) -- Most savers should take advantage of this if their work offers a 401(k) plan. It's especially valuable if your employer matches contributions (that's free money!).
You don't have to go all-in at once. Even moving a small chunk of excess cash into an investment account is a better move than letting it sit idle.
Whatever cash you do keep on hand, just make sure it's at least earning a competitive rate. Right now, the best high-yield savings accounts are paying around 4.00% APY -- don't settle for pennies.
See today's top high-yield savings accounts and make sure every dollar you're keeping in cash is actually earning its keep.
Our Research Expert
Joel O’Leary is a full-time Personal Finance Writer at Motley Fool Money, covering credit cards, bank accounts, investing, mortgages, and other personal finance topics. Joel has been writing about personal finance since 2018, previously leading editorial content for the How To Money podcast and serving as a resident writer at Budgets Are Sexy. He bought his first rental property at age 18, funding the down payment with savings from his high school job at McDonald’s -- a testament to his lifelong passion for smart money decisions. His work aims to make personal finance accessible and actionable for everyday readers. When he’s not writing, Joel enjoys surfing and spending time with his family.
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