Emergency Fund Calculator
An emergency fund is the money that keeps you afloat if your income stops. Add up what you actually have to spend each month, choose how many months you want covered, and this works out the target, how far off you are, and how long it takes to close the gap at your current saving rate.
Rent or mortgage, plus any fixed housing costs
Power, water, phone, internet
Groceries. Not restaurants
Fuel, fares, car payment, upkeep
Health, auto, home or renters
The minimum you must pay, not extra
Childcare, medication, anything you cannot skip
Your target
Your essential spending comes to $3,000 a month. 6 months of that is $18,000. You have $2,000, so you are $16,000 short. At $300 a month you would close that in about 54 months.
11% of a 6 month fund
Two things worth knowing
- Essentials only. This is what it costs to keep the lights on, not your normal spending. If you lost your income you would cut the rest, so including it inflates the target and makes the fund feel impossible.
- It has to be reachable. An emergency fund belongs somewhere you can reach within days, with no CD-style early-withdrawal penalty, subject to your bank's transfer rules. That rules out CDs, which lock the money up, and it is why a plain savings account is the usual home for it.
Once you know the number, the next question is where to keep it, and the rate matters because this money sits still for years.
How this is calculated
What you enter: Your monthly must-pay costs, months to cover, what you have saved, and what you add each month.
target = monthly costs x months to cover
gap = target - saved
months to close the gap = gap / monthly saving, rounded up
- No interest is counted. Interest would shorten the wait a little, so the real time can be a bit less than shown, never more.
- Your costs and your monthly saving stay the same each month.
- No rate is used, so there is nothing here to tax or forecast.
Three months or six, and why the answer is personal
The usual advice is three to six months of essential spending. That range is wide because the right answer depends on one thing: how long it would realistically take you to replace your income.
A household with two salaried earners in common roles can sit near the bottom of that range, because losing one income is survivable and rehiring is quick. A single earner, someone on commission or contract, or anyone in a specialised field where openings are rare, has a longer runway to cover and belongs nearer the top. Being self-employed usually argues for more again, because income can fall without ever stopping.
If the full target looks out of reach, it is worth knowing that most of the benefit arrives early. The gap between nothing and one month of cover is the difference between a surprise bill being a problem and being a catastrophe. Aim at one month, then three, then six.
Where the money should sit
An emergency fund has one job, which is being there on the day you need it. That rules out anything that locks the money up or can fall in value at the wrong moment. A CD charges a penalty to break early, so it is the wrong home for this money however good the rate looks. Investments can be down precisely when you are made redundant, because the two tend to happen in the same conditions.
That leaves a savings account you can draw on within a few days. The rate still matters, though, because this money sits still for years by design. You can model what a given rate would earn on the balance above, or compare accounts on fees, minimums and access. We do not publish bank rates here, because they change without notice and a stale figure is worse than none, so each account links to the bank for the current number.
Frequently asked questions
How much should I have in an emergency fund?
The common guidance is three to six months of essential spending, and closer to six to twelve if your income is variable, you are self-employed, or you are the only earner in your household. The figure that matters is your own essential spending, not an average, which is why this calculator asks you to add up the categories rather than guessing a round number.
What counts as an essential expense?
Anything you would still have to pay if you lost your income tomorrow. Housing, utilities, food, transport, insurance, minimum debt payments and things like childcare or medication. Streaming, holidays, restaurants and hobbies are not essentials. Including them inflates the target and makes the fund look unreachable.
Should my emergency fund be three months or six months?
It depends on how quickly you could replace your income. Two earners in stable salaried jobs can reasonably sit at the lower end. One earner, commission income, contract work or a specialised role that takes longer to rehire into all argue for the higher end. If you are unsure, three months is a real milestone worth reaching before you aim at six.
Where should I keep an emergency fund?
Somewhere you can reach within a few days with no CD-style lockup, subject to your bank's transfer rules, which in practice means a savings account rather than a CD or an investment account. A CD locks the money for a term and charges you to break it early, which defeats the purpose. Market investments can be down exactly when you need the cash.
Should I pay off debt or build an emergency fund first?
Most guidance suggests a small starter fund first, often around one month of essentials, so that an unexpected bill does not send you straight back onto a credit card, then focusing on high-interest debt, then returning to finish the fund. We cannot tell you what is right for your situation, and anyone who gives you a firm answer without knowing your interest rates is guessing.
Does an emergency fund lose value to inflation?
Its buying power does erode if it sits in an account paying close to nothing, which is the main argument for keeping it in a high-yield savings account rather than a checking account. The point of the fund is availability rather than growth, but there is no reason to accept a near-zero rate for money that will sit still for years.
This is general information, not financial advice for your situation. The right size for your fund depends on circumstances we cannot see.
What to do next
Want to know when the savings landscape changes?
We will email you when the Federal Reserve moves its target rate, when the FDIC publishes new national averages, and when we publish a newly verified comparison. We do not track individual banks’ APYs and we will not pretend to, so this is an infrequent email about things that genuinely change the picture.
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