Emergency Fund Calculator
Set your emergency fund target from your essential expenses and see how many months it takes to reach it.
Educational estimate only, not financial advice. Essential expenses means rent or mortgage, utilities, food, insurance, minimum debt payments, and transportation, not discretionary spending.
How it works
Enter your essential monthly expenses, the number of months of cushion you want (3, 6, 9, or 12), what you've already saved, and how much you can add each month. The calculator multiplies your expenses by the cushion to get a dollar target, subtracts what you already have to find the gap, and divides the gap by your monthly contribution to see how many months it will take, rounding up so you don't undershoot.
Worked example: essential expenses of $3,500 a month with a 6-month cushion sets a target of $21,000. If you already have $3,000 saved and can put away $500 a month, the gap is $18,000, and at $500 a month that takes 36 months, exactly 3 years. Bumping the monthly contribution up, even by $100, shortens that timeline noticeably, since it's a straight division of the remaining gap.
FAQ
Why 3, 6, 9, or 12 months, and which one should I pick?
Three months is a common minimum for a stable, dual-income household with low job risk. Six months is the standard general recommendation. Nine to twelve months makes more sense if you're self-employed, on commission, single-income, or in a field with irregular or seasonal work. Pick the number that matches how quickly you could realistically replace your income if it stopped.
What counts as an essential monthly expense?
Rent or mortgage, utilities, groceries, insurance premiums, minimum debt payments, and transportation you need to get to work. Leave out things you'd cut immediately in a real emergency, like subscriptions, dining out, or discretionary shopping. The point is to cover survival, not your normal lifestyle.
Should my emergency fund earn interest?
Yes, keep it in a high-yield savings account rather than a checking account or under a mattress. You still want it liquid and boring, not invested in stocks, since the whole point is that it's there instantly when you need it, but there's no reason to leave it earning nothing while it sits.
What if the calculator says 0 months?
That means your current savings already meet or exceed your target for the cushion you selected. You're done funding it for now, at least until your expenses go up and the target rises with them.
For more on building this fund from scratch, see how to build an emergency fund, how much you should have in savings, and saving money on a low income.