What Is an Emergency Fund? How Much to Save and Where to Keep It

Short answer: What is an emergency fund? It's a cash reserve you set aside only for unplanned expenses or financial emergencies, such as a car repair, a home repair, a medical bill or a loss of income. There's no official amount to save. The CFPB suggests basing your goal on the surprise costs you've actually had, and the Federal Reserve uses three months of expenses as one common yardstick. Keep the money somewhere safe and easy to reach, such as an insured bank or credit union account.

A surprise bill is hard enough without having to borrow to pay it. This guide explains what an emergency fund is for, how to pick a savings target, where to keep the money, and simple ways to build one, using guidance from the Consumer Financial Protection Bureau (CFPB) and the Federal Reserve's 2025 survey of household finances.

What Is an Emergency Fund and What Is It For?

The CFPB describes an emergency fund as "a cash reserve that's specifically set aside for unplanned expenses or financial emergencies." Its examples are car repairs, home repairs, medical bills and a loss of income.

The point is to have money ready before you need it. Without savings, the CFPB notes, even a small financial shock can set you back. People who struggle to recover may turn to credit cards or loans, which can become debt that's harder to pay off, or they may pull money out of retirement savings. Paying with savings instead of credit also keeps interest and fees from making the bill bigger.

An emergency fund is different from saving for a planned purchase, such as a vacation or a new phone. It's money you hope to leave alone, kept for the things you can't schedule.

Why Does an Emergency Fund Matter?

The Federal Reserve's annual survey of household finances shows how much savings shape the way people handle surprises. In its report on 2025:

• 63% of adults said they would cover a hypothetical $400 emergency expense completely with cash or its equivalent. That share was unchanged from 2024.
• 70% said they could pay an expense of at least $500 using only their current savings.
• 55% said they had set aside rainy day savings to cover three months of expenses, unchanged from 2024 but down from a high of 59% in 2021.

The Fed also found that savings levels vary widely. Of households earning $100,000 or more, 75% had savings to cover three months of expenses, compared with 21% of households earning under $25,000. Among adults 60 and older, 71% had that cushion.

If you're near or in retirement, an emergency fund also protects your nest egg. The CFPB lists pulling from retirement savings as one way people cope with a shock they haven't saved for. Our guide to borrowing from your 401(k) explains what that option can cost.

How Much Should You Have in an Emergency Fund?

There's no government rule for the right amount. The CFPB's approach is practical: think about the most common unexpected expenses you've had, such as a car repair or a medical bill, and what they cost. Use that to set your first goal.

The Federal Reserve's survey uses a longer yardstick. It calls savings that would cover three months of expenses "one common measure of financial resiliency," because some problems, such as losing a job, take more money than a single surprise bill.

Putting the two together gives you a simple way to set targets in stages:

1. Start small. The CFPB notes that even a small amount can give you some security. A first goal can be enough to cover one common surprise expense.
2. Cover your typical surprise. Raise the goal to match the most expensive unplanned bill you've had in recent years.
3. Work toward three months of expenses. Add up what you spend in a month on essentials, multiply by three and use that as a longer-term target.
4. Rebuild after you use it. The CFPB recommends refilling the fund after you take money out.

Your own target depends on your income, your expenses and the kinds of surprises your household tends to face.

Where Should You Keep Your Emergency Fund?

The CFPB says your emergency fund should be safe, accessible and not too tempting to spend. It lists three options:

Option	What the CFPB says	Things to know
Bank or credit union account	Generally considered one of the safest places; ideally a dedicated account	Insured up to $250,000 per depositor, per ownership category, at FDIC-insured banks, and at least $250,000 at federally insured credit unions (see below)
Prepaid card	Not connected to a bank account; you can only spend what's loaded on it	Useful if you want to keep the money separate from everyday spending
Cash	Can be kept at home or with someone you trust	Can be stolen, lost or destroyed

Deposit insurance. FDIC deposit insurance covers $250,000 per depositor, per FDIC-insured bank, for each account ownership category. It covers checking, savings, money market deposit accounts and certificates of deposit (CDs). At a federally insured credit union, the NCUA provides at least $250,000 of coverage for share accounts, including share savings, share draft and share certificate accounts.

What isn't insured. The FDIC says its insurance doesn't cover non-deposit investment products, even those offered by FDIC-insured banks. Its examples include stocks, bonds, mutual funds, annuities, life insurance and crypto assets. The NCUA likewise doesn't insure money invested in stocks, bonds, mutual funds, life insurance policies or annuities, even when a credit union sells them. These products aren't on the CFPB's list of places for emergency savings, and because their value can drop, they may be worth less just when you need the cash.

If you're choosing between account types, our guides to checking vs. savings accounts and money market accounts vs. savings accounts compare how each one works.

How Do You Build an Emergency Fund?

The CFPB lists several ways to get started. If your budget is tight, it says managing your cash flow or saving part of a tax refund are the easiest places to begin.

1. Create a savings habit. Set a specific goal, contribute on a regular schedule, track your progress and celebrate milestones along the way.
2. Manage your cash flow. Track when money comes in and goes out. If the timing of bills and paychecks leaves you short, you may be able to adjust due dates with your creditors.
3. Save one-time money. Put all or part of a tax refund, a gift or another windfall into savings.
4. Automate it. Set up recurring transfers from checking to savings, and keep an eye on your checking balance so a transfer doesn't cause an overdraft fee.
5. Save through work. Ask your employer whether you can split your direct deposit between checking and savings, so part of each paycheck goes straight to your emergency fund.

When Should You Use Your Emergency Fund?

Not every unexpected expense is an emergency. The CFPB suggests setting your own guidelines for what counts and trying to stay consistent.

A few questions can help you decide in the moment:

• Is this cost necessary, such as keeping your car running so you can get to work?
• Is it urgent, or could you plan and save for it over the next few months?
• Would paying with a credit card or loan add interest and fees that make it cost more?

When you do use the fund, the CFPB recommends rebuilding it afterward. Restart your automatic transfers, or send your next windfall back into savings, until you're back to your goal.

The Bottom Line

An emergency fund is cash set aside for the surprises you can't plan for, from a car repair to a lost paycheck. Start with a goal you can reach, then work toward covering your typical surprise expense and, over time, three months of expenses. Keep the money in an insured bank or credit union account that you don't use for everyday spending, and refill it after you use it. Once that cushion is in place, it's easier to keep your longer-term savings, like your 401(k) contributions, on track.

Frequently asked questions

What is an emergency fund in simple terms?

It's money you set aside only for surprises. The Consumer Financial Protection Bureau describes it as a cash reserve specifically set aside for unplanned expenses or financial emergencies, such as car repairs, home repairs, medical bills or a loss of income.

How much should I have in my emergency fund?

There's no single right number. The CFPB suggests looking at the most common unexpected expenses you've had and what they cost, then setting a goal from that. The Federal Reserve treats savings that would cover three months of expenses as one common measure of financial resilience. Even a small amount gives you some security.

Where should I keep my emergency fund?

Somewhere safe, accessible and not too tempting to spend. The CFPB says a bank or credit union account is generally considered one of the safest places, ideally an account used only for emergencies. Deposits at an FDIC-insured bank are covered up to $250,000 per depositor, per ownership category, and the NCUA provides at least $250,000 of coverage at federally insured credit unions.

Should I invest my emergency fund in stocks or mutual funds?

An emergency fund is meant to be there when you need it. Stocks, bonds and mutual funds aren't covered by FDIC or NCUA insurance, even when you buy them through a bank or credit union, and their value can go down. The CFPB's suggested places for emergency savings are a bank or credit union account, a prepaid card or cash.

What should I do after I use my emergency fund?

Rebuild it. The CFPB recommends setting rules ahead of time for what counts as an emergency, and refilling the fund after you use it so it's ready for the next surprise.

Sources

1. CFPB: An Essential Guide to Building an Emergency Fund
2. Federal Reserve: Economic Well-Being of U.S. Households in 2025 — Savings and Investments
3. FDIC: Understanding Deposit Insurance
4. NCUA (MyCreditUnion.gov): Share Insurance

This guide is general information, not personal advice. Your situation may differ, so consider talking with a qualified professional, such as a fiduciary financial adviser, CPA or licensed agent, before making a decision.