How the emergency fund calculator works
An emergency fund covers essential costs if your income stops or a large unexpected bill arrives. The target is a multiple of your essential monthly expenses, not your income.
Months to fund = (Target − Current savings) ÷ Monthly savings
Essential expenses are housing, utilities, food, insurance, transport, minimum debt payments and childcare: what you would still pay if you cut every extra. Three months is a common minimum for dual-income households with stable jobs; six months or more suits single earners, the self-employed and people in industries with long job searches. Keep the money in a liquid, insured account such as a high-yield savings account.
Worked example
With essential costs of $3,200 a month and a six-month goal, the target is $19,200. You have $4,000, which covers 1.3 months, so you still need $15,200. Saving $400 a month gets you there in 38 months; doubling to $800 cuts it to 19 months.
Frequently asked questions
How many months of expenses should I save?
Three to six months is the usual guidance. Consider more if your income is irregular, you are the only earner, or you have dependants.
Should I use income or expenses?
Expenses, specifically essential ones. Your spending in a crisis is usually lower than your normal budget.
Where should I keep an emergency fund?
In an FDIC- or NCUA-insured savings or money market account that you can reach within a day or two, separate from everyday checking.
Should I build an emergency fund or pay off debt first?
Many planners suggest a small starter fund first, then high-interest debt, then the full fund, so a surprise bill does not go on a credit card.
Updated October 2026. Results are estimates for education, not financial or medical advice. All math runs in your browser; nothing you type is sent anywhere.