Emergency Fund Calculator
How much cash to set aside before a bad month arrives
Enter your essential monthly costs and see the fund you need
Free · No sign-up · Updates as you typeAn emergency fund is the cash that keeps paying your essential bills when your income stops. Size it on what you must pay every month, not on everything you spend, because in a real emergency the holidays and the subscriptions are the first things to go.
$
Rent or mortgage, food, bills, insurance, transport, minimum debt payments. Not holidays or subscriptions.
3 to 6 months is the usual starting point, e.g. 6.
$
What is set aside today, e.g. 3,000. Enter 0 if you are starting from nothing.
$
What you can add to the fund every month, e.g. 400. Enter 0 if nothing is spare right now.
The emergency fund you need, 6 months of your essential costs
$15,000
In plain terms: your essential costs are $2,500 a month and you want 6 months of cover, so your target is $2,500 × 6 = $15,000. You have $3,000 set aside, enough to pay the essentials for 1.2 months, which leaves $12,000 to find. Saving $400 a month, you get there in 30 months.
Of your target saved
20%
Months your cash covers now
1.2
Still to save
$12,000
Months of saving to get there
30
How the months of cover you choose change the target
Three months and twelve months are very different jobs to fund. Here is the same $2,500 of essential costs at each level, measured against the $3,000 you already have.
| Months of cover | Fund you need | Still to save | Months to get there |
|---|---|---|---|
| 3 | $7,500 | $4,500 | 12 |
| 6 (yours) | $15,000 | $12,000 | 30 |
| 9 | $22,500 | $19,500 | 49 |
| 12 | $30,000 | $27,000 | 68 |
Insight: Fill this before you invest seriously. It is the buffer that stops a lost job or a broken boiler from forcing you to sell investments on a bad day or borrow at card rates, and it is worth more to you than the extra return you give up by holding cash.
An emergency fund is a reserve of cash set aside to cover essential expenses during an unexpected event such as a job loss, medical bill or urgent repair. This calculator sizes that fund from your essential monthly expenses and a target number of months of coverage, then compares it with what you have already saved to show the gap and how long it will take to close at your monthly savings rate.
Target Fund = Essential Monthly Costs × Months of Cover
Step 1: Pick your currency and add up the costs you could not stop paying in a crisis: housing, food, bills, insurance, transport, minimum debt payments.
Step 2: Choose how many months of cover you want. Start at 3 to 6, then push it higher if your income is variable or you are the only earner.
Step 3: Enter the cash you have set aside and what you can save each month, then read your target, the gap and the months of saving left. Everything updates as you type, and the table shows what a different number of months would cost you.
What Is an Emergency Fund?
An emergency fund is money set aside specifically to cover essential living costs when something unexpected happens, losing a job, a medical emergency, an urgent home or car repair. Its purpose is not to earn a return but to act as a financial shock absorber, so that a temporary crisis does not turn into long-term debt or force you to sell long-term investments at the worst possible moment.
Most personal-finance frameworks treat the emergency fund as the foundation that comes before serious investing. Without it, any unexpected expense has to be met with credit cards or loans, or by liquidating investments, undermining the compounding you are trying to build. With it, you can invest with confidence, knowing a setback will not derail your plan.
How Big Should Your Emergency Fund Be?
The common rule of thumb is three to six months of essential expenses, but the right figure depends on how stable and replaceable your income is. Someone with secure, salaried employment, dual household income and no dependents may be comfortable at the lower end. Someone who is self-employed, works on commission, is the sole earner, or supports dependents should lean toward six to twelve months, because their income is more likely to be interrupted and harder to replace quickly.
Crucially, size the fund on essential expenses, not your full lifestyle. Include housing, utilities, food, insurance, transport and minimum debt payments; exclude discretionary spending you would naturally cut in a crisis. This keeps the target realistic, and the calculator above lets you test different coverage levels to find a number that is both safe and achievable.
One thing the calculator cannot know is the safety net you already have. Statutory sick pay and unemployment cover differ sharply from country to country, and they decide how much of the gap you actually have to fund yourself. For how to weigh that, along with income risk and how long your particular job takes to replace, read Emergency Fund: How Many Months Do You Really Need?, then come back and set the months of cover accordingly.
Where to Keep It, and the Inflation Trade-off
An emergency fund must be safe and instantly accessible, so it belongs in cash-like accounts, a high-interest savings or money market account, not in the stock market, where its value could fall just when you need it. The trade-off is that cash tends to lose purchasing power to inflation over time, which is why you hold enough to be safe but no more: once the fund is full, additional savings are usually better directed toward investments that can outpace inflation. Holding it in a separate account from your day-to-day money also makes it less tempting to dip into.
Related Calculators
Once your safety net is in place, the next step is putting surplus savings to work. See how regular contributions compound over time with the compound interest calculator, and because cash held in reserve quietly loses value over the years, the inflation calculator shows how much purchasing power even a safe cash buffer gives up to inflation over time.
Frequently Asked Questions About Emergency Funds
A common guideline is three to six months of essential living expenses, but the right number depends on your situation. People with stable, secure income and few dependents may be comfortable nearer three months, while those with variable income, self-employment, a single household earner, or dependents often aim for six to twelve months. The goal is enough cash to cover essentials through a job loss or major unexpected cost without selling investments or taking on debt.
Base the fund on essential expenses, not your total spending. Include housing (rent or mortgage), utilities, food, insurance, transport, minimum debt payments, and other non-negotiable costs. Discretionary spending such as holidays, subscriptions and dining out can be excluded, because in a genuine emergency you would cut those back. Using essential expenses keeps the target realistic and achievable.
An emergency fund should be safe and immediately accessible, so it is usually kept in cash-like accounts such as a high-interest savings account or money market account rather than invested in stocks. The priority is liquidity and capital safety, not return, you must be able to withdraw it instantly without the risk of it having fallen in value. Keeping it separate from your everyday account also reduces the temptation to spend it.
Then the honest answer is that the gap will not close on its own, and the calculator says so rather than showing a comforting number. Start with a first milestone instead of the full target: one month of essential costs, or even a fixed small sum, is already enough to absorb a broken boiler or an unexpected bill without reaching for a credit card. Once that is in place, raise the monthly amount whenever a cost drops away or your income rises.
Track Your Safety Net and Your Net Worth
An emergency fund is the foundation of a healthy financial life. With Worthmap you can track your cash reserves alongside your investments and net worth, across currencies, in one place.
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