Emergency Fund Calculator: How Much and How Long

How to use the calculator

Add up your essential monthly expenses: the bills you would still have to pay if your income stopped, such as rent or mortgage, utilities, groceries, insurance premiums, transportation and minimum debt payments.
Choose the number of months you want the fund to cover (6 by default).
Enter what you have already saved for emergencies and how much you can save each month.
Under more options, enter the APY your savings account pays, if any.

You'll see the target, the amount still missing, how many months your current savings cover and how many months of saving remain.

How the calculation works

Target = essential monthly expenses × number of months.
Gap = target − current savings, never below zero.
Coverage = current savings ÷ monthly expenses, in months.
Months to goal: each month the balance earns the monthly equivalent of your APY, then your monthly saving is added, until the balance reaches the target. The result is rounded up to whole months.

The calculator assumes your expenses, savings amount and APY stay the same. It doesn't account for inflation, taxes on interest or withdrawals along the way. If you save nothing each month and your savings earn no interest, no date can be calculated.

Worked examples

1. Six months of $3,500

Target: $21,000. With $4,000 saved, you're covered for 1.1 months and $17,000 short. Saving $400 a month, you'll get there in 43 months; with a 4% APY, in 39 months. Raising the monthly amount to $600 cuts it to 29 months without interest.

2. A starter fund of three months

Essential expenses of $2,800 give a target of $8,400. Starting from $1,000 and saving $250 a month, you need 30 months, or 28 months if the account pays 4% APY.

3. Nine months for a single-income household

At $5,200 a month, the target is $46,800. The $12,000 already saved covers 2.3 months. Adding $800 a month to an account paying 3.5% APY, you reach the goal in 40 months instead of 44 without interest.

Reading the result

The target isn't a rule. There's no single official number of months: the Consumer Financial Protection Bureau says the amount you need depends on your situation and suggests looking at the unexpected expenses you've had before. A household with one income, variable pay or dependents may want more months; someone with very stable income may choose fewer. Even a small fund helps with car repairs or medical bills. If the number of months looks discouraging, start with a smaller target and raise it once you reach it.

Frequently asked questions

How many months of expenses should an emergency fund cover?

It depends on how secure your income is and who depends on it. The calculator starts at 6 months, but you can choose anywhere from 1 to 24. With $3,500 of essential expenses, 3 months means $10,500, which takes 17 months at $400 a month from a $4,000 start; 6 months means $21,000 and 43 months.

Should I count all my spending or only essentials?

Only what you'd still need to pay in a crisis. Subscriptions, dining out and travel can usually be cut, so leaving them out gives a smaller, more reachable target. Do include minimum debt payments, which you'd still owe.

Where should I keep my emergency fund?

Somewhere safe and easy to reach quickly, such as a savings or money market account at an insured bank or credit union. FDIC insurance covers deposits up to $250,000 per depositor, per insured bank, for each ownership category; NCUA share insurance offers the same $250,000 limit at federally insured credit unions. Stocks, bonds and mutual funds aren't covered by share insurance, even when sold at a credit union.

Does earning interest really speed things up?

A little. In the first example, a 4% APY shortens the timeline from 43 to 39 months. The monthly amount you save matters far more than the rate.

What if I can't save anything each month right now?

The calculator then shows no date: with $2,000 saved toward an $18,000 target and nothing added, the gap never closes. The CFPB suggests automatic transfers to savings, splitting a direct deposit, or setting aside part of a tax refund.

What if I already have enough?

The status shows the fund as complete. With $7,000 saved and $2,000 of monthly essentials, you're covered for 3.5 months, more than a 3-month target of $6,000. Revisit the target when your expenses change.

Sources

This calculator provides estimates for educational purposes and is not financial advice. Your target should reflect your own income, expenses and obligations.

Results