How Big Should an Emergency Fund Be?

An emergency fund is money you keep aside for things you can’t plan for: a car repair, a medical bill, a gap between jobs. Having it means a surprise bill stays an inconvenience instead of turning into credit card debt or a missed rent payment.

The Federal Reserve’s 2024 survey of household finances found that 63% of adults would cover an unexpected $400 expense with cash or its equivalent. That figure has hovered there for several years, so a large share of people would have to borrow, sell something or fall behind. An emergency fund is how you get into the first group and stay there.

The short answer: three to six months of essential expenses

The common guideline is three to six months of essential expenses. “Essential” is the important word: it means what you’d have to pay if your income stopped. That’s not your total spending, and it’s not your income.

Essential expenses usually include:

• Rent or mortgage, and insurance
• Utilities and a basic phone plan
• Groceries
• Transportation you need (car payment, insurance, fuel, transit)
• Health insurance and regular medical costs
• Minimum payments on debts
• Childcare, if you’d still need it

Leave out what you’d stop in an emergency: restaurants, subscriptions, travel, extra debt payments and savings contributions.

A worked example

Say your essential expenses come to $2,800 a month:

• Three months: 3 × $2,800 = $8,400
• Six months: 6 × $2,800 = $16,800

If you can save $300 a month toward it, reaching three months takes $8,400 ÷ $300 = 28 months. That’s a long time, which is why the next section matters. Our emergency fund calculator runs these numbers for you, and if you use To Budget Simply it can start from your real spending.

Closer to three months, or six (or more)?

Aim toward three months if:

• Your job is stable and in demand, and you could find similar work quickly
• Your household has two incomes that don’t depend on the same employer
• You have few dependants and modest fixed costs

Aim toward six months or more if:

• You’re self-employed, work on commission or have irregular income
• You’re the only earner, or others depend on your income
• You own a home or an older car (more ways for big repairs to happen)
• Your industry is seasonal or prone to layoffs, or finding a new job in your field takes a while
• You have health issues that could mean time off work

There’s no prize for picking the bigger number if it means years of saving while you carry high-interest debt. The guideline is a target to grow into, not a test.

Build it in stages

Starting from zero, saving months of expenses can feel impossible. Breaking it into steps helps. The Consumer Financial Protection Bureau’s Start Small, Save Up initiative is built on the same idea: start with a small, regular amount and grow the habit.

1. A starter cushion. Aim first for enough to cover a common surprise, such as a car repair or an urgent trip, perhaps $500 to $1,000. Many people find this the most important stage: it stops the cycle of small emergencies landing on a credit card. Elizabeth Warren and Amelia Warren Tyagi’s All Your Worth suggests a similar first step of $1,000 before tackling debt.
2. Pay down high-interest debt. With the starter cushion in place, it often makes sense to put more toward credit cards and other expensive debt, because their interest usually costs more than savings earn. See debt snowball vs. avalanche.
3. Grow to one month, then three. Keep a regular amount going, and add windfalls such as tax refunds, bonuses or a paid-off loan’s freed-up payment.
4. Grow to your full target if your situation calls for six months or more.

The easiest way to keep going is to make it automatic: schedule a transfer to savings for the day after payday, so the money moves before you can spend it.

Where to keep it

An emergency fund needs to be safe and available within a day or two, and ideally it should earn some interest. For most people that means:

• A high-yield savings account at a bank or credit union that’s federally insured (FDIC or NCUA), kept separate from your everyday checking account so it isn’t spent by accident.
• Not the stock market. Investments can fall in value exactly when you need the money, for example during a recession that also threatens your job.
• Not a credit card or a home-equity line. Credit can be cut or reduced when times get hard, and borrowing in an emergency adds a bill to your problems.

When to use it, and refilling it

Use the fund for things that are unexpected, necessary and urgent: a job loss, a medical bill, an essential repair. A sale, a holiday or a predictable bill like an annual insurance premium aren’t emergencies; plan for those with their own savings goals. A savings goal calculator can help you set aside a little each month instead.

When you do use it, that’s the fund doing its job. Make refilling it your next savings priority, the same way you built it.

Quick checklist

• Add up your essential monthly expenses.
• Multiply by three (and by six) for your target range.
• Pick a monthly amount you can keep up, and automate it.
• Hit a starter cushion first, then grow from there.
• Keep it separate, insured and easy to reach.

Ready to work out your number? Try the emergency fund calculator. It shows your target and how long it will take at the amount you can save.