Emergency Fund Calculator
Size your emergency fund from what you actually spend on essentials, see the gap from where you are today, and how long it takes to close.
Your numbers
Why "essential expenses," not income
The most common sizing mistake is multiplying monthly income by six. Your emergency fund exists to cover a stripped-down version of your life — housing, food, utilities, insurance, minimum debt payments, transport — while income is interrupted. Subscriptions, restaurants, and travel pause in a real emergency. Using essential expenses instead of income typically shrinks the target by 25–40%, which turns an impossible-sounding goal into a reachable one. If you don't know your essentials number, the budget calculator is a fast way to get it.
How many months you actually need
The classic "3–6 months" isn't one-size-fits-all — it's a range that depends on how likely an income interruption is and how long one would last:
- 3 months: two stable incomes in the household, in-demand skills, low fixed obligations.
- 6 months: the standard target — single income, or one income plus dependents.
- 9–12 months: self-employed or commission income, specialized fields with long job searches, or a single income supporting several people.
The reasoning behind these tiers — including the factors that matter more than the month count — is covered in how big should your emergency fund be.
Worked example
Essentials of $3,500/month with a 6-month target means a $21,000 fund. With $2,000 saved and $400/month going in at 4% APY, the gap closes in about 3 years and 7 months — the interest quietly contributes over a thousand dollars along the way. If that timeline feels too long, the levers in order of power are: the month target (does your situation honestly need 6, or is 4–5 enough while you also pay down debt?), the monthly contribution, and only distantly the interest rate.
Where to keep it
An emergency fund has one job: being there, instantly, in full. That rules out stocks (can be down 30% the month you need it) and CDs with withdrawal penalties. A high-yield savings account at an FDIC-insured bank is the standard answer — currently paying meaningful interest while staying one transfer away. Keeping it at a different bank than your checking account adds one day of friction, which is often enough to protect it from non-emergencies.
Questions people ask
Emergency fund or debt payoff first?
A starter fund first — $1,000 to one month of essentials — because without one, any surprise goes straight onto a credit card and undoes your progress. Then attack high-interest debt hard (see the debt payoff calculator), then finish the full fund. Carrying 25% APR debt while building a 6-month fund at 4% APY costs you money every month.
What counts as an emergency?
Involuntary and necessary: job loss, medical bills, the car your job depends on, the roof. Predictable irregular expenses — holidays, annual insurance, car maintenance — deserve their own sinking funds, which is what the savings goal calculator is for.
Can it be too big?
Yes. Beyond about 12 months of essentials, extra cash is losing to inflation for a safety benefit you've already secured. Past that point, money generally works harder in retirement accounts or other investments.