Emergency Fund Calculator
How many months your savings would actually cover, what the target you want costs, and how long a monthly amount takes to get there.
The address carries whatever you changed, so anyone opening it sees these numbers. Nothing is saved on our side.
Months of cover you have
1.3months
$4,000 of a $19,200 target. Saving $500 a month closes the $15,200 gap in 2 years 5 months.
- $19,200
- 6 months of essentials
- $4,000
- $15,200
- 2 years 5 months
- $1,103
- 6.4 months
- of saving
What each target costs
Cover is priced in months of your own essentials, so the right number depends on how long you would plausibly be without income — not on a rule of thumb.
| Cover | Target amount | Still needed | vs yours |
|---|---|---|---|
| 3 months of cover11 months away | $9,600 | −$9,600 less in total | |
| 4 months of cover1 year 5 months away | $12,800 | −$6,400 less in total | |
| 6 months of coveryours2 years 5 months away | $19,200 | — | |
| 9 months of cover3 years 9 months away | $28,800 | +$9,600 more in total | |
| 12 months of cover5 years 1 month away | $38,400 | +$19,200 more in total |
How many months is right
There is no correct answer, but there are better and worse ways to arrive at one.
Steady income, two earners
Two salaries rarely stop at once, and a shorter fund frees money for debt or investing. The shorter end of the range is defensible here — the fund is covering a gap, not a collapse.
One income, or a mortgage
Fixed obligations that do not shrink when income does are the argument for more cover. The relevant question is how long your particular role takes to replace, not an average.
Irregular or commission income
The fund is smoothing normal variation as well as insuring against disaster, so it is doing two jobs and needs to be bigger. Self-employment usually argues for the top of the range.
One thing worth doing before any of this: if you carry credit card debt above 20%, a small starter fund and then the debt usually beats a full fund first. The card is charging you more than any savings account pays, and an emergency fund earning 4% while a balance costs 25% is an expensive kind of safety.
How this calculator works
Months of cover rather than a dollar target, because that is the unit the decision is actually made in.
Your target is essential monthly costs multiplied by the months of cover you want. Current savings divided by the same essentials gives the cover you already have — the figure that leads the result, because “two and a half months” means something in a way that a dollar amount does not.
The gap is then closed month by month, with the balance earning interest as it grows. Interest is included because an emergency fund does sit in a savings account for years and the growth is not nothing — but it is reported separately so you can see how little of the work it does. Contributions do almost all of it.
The last figure — months of saving per month of cover — is the exchange rate between the two. It answers “what does one more month of safety cost me?” directly, which is usually the decision being made.
What is assumed
- Essential costs stay flat while you build the fund.
- The same contribution every month, and nothing withdrawn.
- A constant savings rate, credited monthly.
- Total loss of income in the scenario being insured — no partial earnings, no benefits.
A worked example
$3,200 of essentials a month, $4,000 saved, six months wanted, $500 a month going in at 4%.
| Target | $3,200 × 6 |
|---|---|
| Cover you have | $4,000 ÷ $3,200 |
| Gap | 19,200 − 4,000 |
| Time at $500 a month | With interest at 4% |
| Interest earned along the way | Over those 29 months |
| Cost of one more month of cover | $3,200 ÷ $500 |
Two and a half years to reach six months of cover, of which interest supplies $1,102.68 — about 7% of the gap. Worth having, and clearly not the lever: the contribution is. Raising it to $700 a month matters far more than finding an account paying half a point more.
The final figure is the one worth sitting with. Each additional month of cover costs 6.4 months of saving at this rate, so the difference between a three-month and a six-month fund is well over a year of contributions. That is a real trade against paying down debt or investing, and it deserves a deliberate answer rather than a default one.
Questions people ask
It depends on how long you would plausibly be without income, which is a fact about your job and household rather than a rule. Two stable incomes argue for less, because they rarely stop together. A single income, a mortgage, or commission-based earnings argue for more. The honest question is how long your particular role takes to replace — not what a general figure suggests.
What you would still be paying with no income: housing, food, utilities, insurance, transport to interviews, and the minimum payments on any debt. Not your whole budget. Subscriptions, holidays, dining out and discretionary saving all stop in the scenario the fund exists for, and including them inflates the target by a third or more for no benefit.
Somewhere you can reach within a day or two, at an institution where the balance is insured, and earning whatever a competitive savings account pays. It should not be in stocks — the moment you need it is disproportionately likely to be a moment markets are down — and it should not be in a CD, where getting it early costs a penalty. Earning something is worth doing; reaching for yield is not.
Usually a small starter fund first, then high-interest debt, then the full fund. A card charging 25% costs far more than a savings account pays, so a fully-funded emergency fund sitting alongside a credit card balance is an expensive kind of safety. But going in with nothing at all means the next unexpected expense goes on the card, which is what caused the problem.
No, and the reason is specific. The emergencies that matter most — losing a job, a health event — are exactly the circumstances in which credit gets withdrawn or repriced. A line of credit is available until you look like you need it. Cash does not have that property, which is the entire point of holding it.
Stop adding to it and redirect the contribution. Money beyond your target is earning a savings rate when it could be invested, and the fund does not get better by being larger than the scenario it is insuring. Revisit the target when your essential costs change materially — a bigger mortgage raises the target without you doing anything.
Related calculators
Cover is measured against the essential costs you enter, so the answer is only as good as that figure. It does not model losing part of an income rather than all of it, unemployment benefits, or costs that rise during a crisis.