Free Tool
Emergency Fund Runway Calculator
Enter what you spend each month on true essentials, and see exactly what a 3, 6, and 9-month emergency fund looks like in real dollars for your household.
What Is an Emergency Fund?
An emergency fund is cash set aside specifically to cover what you can't predict — a layoff, a medical bill, an urgent car or home repair. It's the buffer that keeps a genuine emergency from turning into new debt. Unlike a sinking fund, which covers expenses you already know are coming, an emergency fund exists for the expenses you hope you never need it for. This calculator is really answering one question: what's your financial runway if your income stopped tomorrow?
How Many Months Should I Save?
Three months of essential expenses is a common starting target for a stable, dual-income household. Six months is the more typical recommendation overall, and nine months (or more) makes sense for single-income households, variable or commission-based income, or anyone in a role where a new job would take longer than average to find. There's no universally correct number — it's a trade-off between peace of mind and how much cash sits earning a lower return than it might elsewhere.
Needs, Not Your Whole Budget
The calculator above is built around essential monthly expenses on purpose — rent, utilities, groceries, insurance, minimum debt payments. Discretionary spending like dining out, subscriptions, and entertainment is usually the first thing to get cut in a real emergency, so it shouldn't inflate the size of the fund you're targeting. If you've already sorted your spending into Needs, Wants, and Savings/Debt categories, your Needs total from the Zero-Based Budget Planner drops straight into the field above.
Where Should I Keep an Emergency Fund?
This money needs to be liquid — accessible within a day or two, without penalty — while still earning something. That combination points to a high-yield savings account (HYSA) at an FDIC-insured bank, kept separate from your everyday checking account so it's harder to dip into for non-emergencies.
Already funded your emergency fund?
Use the Sinking Fund Calculator for the expenses you can already see coming, like an annual bill or the holidays.
Open the Calculator
Frequently Asked Questions
How much should I have in an emergency fund?
Most guidance lands between 3 and 6 months of essential expenses — rent or mortgage, utilities, groceries, insurance, minimum debt payments. Households with a single income, variable income, or higher job-loss risk often aim closer to 9 months instead.
Should my emergency fund cover my whole budget or just my needs?
Just your needs — the bills that don't stop if your income does. Discretionary spending like dining out or subscriptions is usually the first thing that gets cut in a real emergency, so it shouldn't inflate the size of the fund you're targeting.
Where should I keep my emergency fund?
Somewhere liquid and separate from everyday spending — typically a high-yield savings account (HYSA) at an FDIC-insured bank. You want the money accessible within a day or two without penalty, while still earning meaningfully more interest than it would sitting in a checking account.
Should I build my emergency fund before paying off debt?
Most plans start with a small starter fund (often one month of needs) before aggressively attacking debt, then return to build the full 3-9 month fund once high-interest debt is cleared. That way an unexpected expense doesn't force you back onto a credit card mid-payoff.
What counts as a real emergency?
Job loss, a medical bill, an urgent car or home repair, or another cost that's both unplanned and necessary. A predictable expense you simply forgot to budget for — an annual bill, a holiday season — belongs in a sinking fund, not your emergency reserve.