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Emergency Fund Calculator

An emergency fund is your own insurance against life's expensive surprises. Add up your monthly essentials to size the target, see how far your savings already go, and get a month-by-month plan to finish the job.

How big should your safety net be?

Start with the size: list your essential monthly costs and your safety-net months. Then flip to the plan tab to see how long deposits into a high-yield account take you to the finish line.

How it works: your essentials add up to one monthly number, and the target is that number times your safety-net months — target = monthly essentials × months. The ring shows what share of the target your current savings already cover, and "months covered" is savings ÷ monthly essentials.

How it works: each month your balance earns APY ÷ 12, then the deposit lands — balance = old × (1 + APY/12) + deposit. The simulator repeats this month by month until the target is reached, exactly like interest posting to a savings account.

How emergency fund math works

An emergency fund is not built from your whole paycheck — it is built from your survival number: what it costs to keep your life running with everything non-essential cut. Three to six months of that number is the classic target because most financial emergencies (job loss, a major car repair, a medical bill) resolve within that window.

The formulas

monthly essentials = housing + food + transport + bills + other essentials · fund target = monthly essentials × safety-net months · months covered = savings ÷ monthly essentials · monthly balance = old × (1 + APY ÷ 12) + deposit

Use essentials, not income: a $6,000 paycheck with $3,250 of essentials needs $19,500 for six months, not $36,000. If income is variable (freelance, commission, gig work), push toward 9–12 months, because your next dry spell can arrive before the fund is finished.

Worked example: $3,250/month of essentials

Sizing: housing $1,800 + food $600 + transport $300 + bills $250 + other $300 = $3,250/month. Six safety-net months gives a target of $19,500. With $5,000 already saved, that covers 1.5 months and the fund is 25.6% funded — $14,500 still to save.

The plan: depositing $400/month into a 5.00% APY high-yield account reaches the full $19,500 in about 33 months — and earns roughly $1,654 in interest along the way. Bump the deposit to $500 and the finish line moves to about 27 months.

Where to keep the fund

Liquid, boring, and separate: a high-yield savings account at a different bank than your checking beats your mattress and beats the stock market. It must be reachable in days without selling anything, and "separate" keeps a routine shopping trip from accidentally becoming an emergency withdrawal.

Where this comes in handy

Size it honestly: list only costs that would keep running if your income stopped — the emergency fund guide shows who needs 3 months and who needs 12.
Debt first or fund first? The $1,000 starter cushion, then attack high-interest debt: run your balance through the credit card payoff calculator to price the delay.
Turn the target into a habit: the savings goal calculator converts any target into the monthly deposit that hits a deadline.
Know your survival number: build it from real spending — your take-home pay calculator shows what actually lands per check.
After the emergency: rebuild with the "how fast" tab above — the first deposit goes back the month after you spend it.

Emergency fund — frequently asked questions

How many months of expenses should I save?

Three to six months of essential expenses is the standard answer: three if you have a stable job plus a second income, six for a typical single-income household. Variable income (freelance, commission, gig work) calls for nine to twelve months, because dry spells can overlap with emergencies.

What counts as a monthly essential?

Only the bills that would keep running if your income stopped: housing, food, transport, utilities, phone, insurance, and minimum debt payments. Leave out dining out, travel, clothing budgets, and hobbies — the fund protects your survival number, not your lifestyle.

Should I build an emergency fund or pay off debt first?

Do both in order: save a $500–$1,000 starter cushion first, then throw every extra dollar at high-interest debt, then grow the fund to its full size. A tiny cushion keeps a flat tire from becoming new credit card debt while you are paying the old balance down.

Where should I keep my emergency fund?

In a high-yield savings account, ideally at a different bank than your checking. It must be liquid (reachable within days) and psychologically separate — money that mixes with everyday spending gets spent on everyday things.

Should I invest my emergency fund for a higher return?

No. An emergency fund can be needed at the worst possible moment — the same market crash that costs a job can cut a portfolio in half. Keep the fund in savings; invest everything beyond it. The 5% from a high-yield account is a bonus, not the point.

What actually counts as an emergency?

An unexpected, necessary, and urgent expense: job loss, a major car repair, an emergency medical bill, a furnace dying in January. A sale, a vacation, or a "can't-miss" deal is not an emergency — that is what sinking funds (separate small savings for planned purchases) are for.

What if I spend part of the fund?

That is what it is for — don't feel guilty. Rebuild it with the same monthly deposit starting the very next month, as if the emergency never happened. Funds that are never replenished become a one-time gift to a bad week instead of a permanent safety net.

Learn the method: the free emergency fund guide walks through the 3–6 month rule, who needs more, where to keep the money, and the debt-vs-fund decision — step by step with worked numbers.