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Your car breaks down, the roof starts leaking, or out of the blue, the doctor orders a bunch of medical tests. Then comes the sinking feeling: How much is this going to cost?

It's times like these when you most appreciate having money set aside for unexpected expenses. A financial cushion can help you avoid being derailed by a sudden emergency that might otherwise require taking on credit card debt.

But gauging whether you've saved enough can be tough. You hear people suggest saving for a “rainy day,” but you can't know what's going to fall from the sky — or exactly how much it will cost to deal with.

To remove some of the guesswork, we looked at real-world examples from the Federal Reserve's latest annual Survey of Household Economics and Decisionmaking, released in May. The survey showed 59% of Americans experienced at least one major unexpected expense in the previous year.

Vehicle trouble was the most common, with 30% of Americans needing a sudden repair or replacement. Home or appliance repairs weren't far behind at 22%, followed by unexpected medical care at 21%. For all three of these surprises, the median bill (aka the most typical bill) was between $1,000 and $2,000, though it wasn't uncommon to spend $5,000 or more.

Among the other findings:

•   18% of Americans had to repair or replace a phone or computer, typically spending $500 to $1,000.

•   10% had sudden legal expenses, taxes, or fines that typically cost $2,000 to $5,000.

•   Almost half of all respondents had some other type of unexpected expense costing at least $2,000.

So what?

Setting an emergency savings goal isn't an exact science. Saving at least three to six months' worth of your basic living expenses (at least $16,000, based on average U.S. expenses) is a standard benchmark designed for crises like losing a job, which can become a persistent drain on your budget. At the same time, many emergencies are a one-time financial hit.

To build an emergency fund that matches your life, consider where your less predictable expenses tend to spring from. Then, start building a fund at your own pace:

Be realistic: Tripling your monthly expenses doesn't have to be your initial goal if that's too daunting. To get the ball rolling and develop the saving habit, maybe start with a goal of $500 or $1,000. That would still cover many unforeseen expenses and would give you some breathing room in your budget.

Automate the habit: Setting up an auto-transfer so that a portion of every paycheck is diverted to a separate account or fund can help you put money away before you have a chance to see it (and mentally spend it). Consider a high-yield savings account (like SoFi's) to maximize the interest you're earning on your savings.

Bank your windfalls: Did you get a tax refund, a work bonus, or cash from selling your old bike? Try to put at least a portion of it straight into your savings.

Related Reading

Is $5,000 Enough for an Emergency Fund? (SoFi)

Are You Saving Enough? A Look at Average Balances Across Ages (Investopedia)

Bankrate's 2026 Annual Emergency Savings Report (Bankrate)

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