Emergency Fund & Savings Calculator: How Many Months Are You Covered?
Add your accounts on the left and your monthly bills on the right. The calculator works out your real runway in months, how far you are from a three- or six-month fund, and what to put aside each month to close the gap. Your figures are remembered on this device — nothing is uploaded.
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An emergency fund is accessible cash divided by essential monthly costs, measured in months. Three months is the usual floor, six is the usual target, and more if your income is irregular or you are the only earner. Two things most people get wrong: they count every expense (only essentials matter, because you would pause the rest) and they count every account (a fixed deposit with a lock-in cannot pay rent on Friday). Fix those two and the number becomes honest — which is exactly what this calculator does.
Runway, not a round number
Most emergency fund calculators ask one question — “what are your monthly expenses?” — and multiply it by six. The answer is only as good as the guess you typed in, and most people guess low. This calculator makes you itemise instead: each bank account with its balance, each bill with its amount. It is a minute of extra work, and it produces a number you would actually trust.
The result is your runway: how many months you could keep paying the bills that matter if every source of income stopped tomorrow. Runway is a better way to think about it than a lump sum, because it scales with your life. Someone paying 1,200 a month in essentials and someone paying 4,000 both need “six months”, but that is 7,200 for one and 24,000 for the other.
Why only essential expenses count
The fund is for the month you lose your job or the car dies, not for a normal month. In that month you cancel the streaming services, stop eating out, and postpone the holiday. What you cannot postpone is rent, the loan repayments, groceries, power, insurance and getting to interviews. Those are the essentials, and they are the only things the target should be built on.
Marking expenses as optional does two useful things. It lowers your target to a realistic figure, which makes it reachable. And it shows you, in the breakdown chart, exactly how much cash you could free up in a crisis by pausing them — which for many households is 20–30% of monthly spending.
If you are unsure, ask: “if I had no income next month, would I still pay this?” If yes, it is essential. A minimum credit-card payment is essential; the gym is not, even if you love it.
Why locked savings do not count either
A fund you cannot reach is not a fund. Fixed deposits with early-withdrawal penalties, notice accounts, pension pots, shares and property all have value, but none of them will settle a bill by Friday without a cost or a delay. The calculator asks you to mark each account as instant access or locked, counts only the accessible ones toward your runway, and then tells you separately what the picture would look like if the locked money were included — so nothing is hidden, it is just kept honest.
Where should the accessible part live? Somewhere boring: an instant-access savings account, ideally one that pays a little interest and is not the account your card is linked to. The point of an emergency fund is to be safe and available, not to grow; the growing is what the rest of your money is for.
How many months do you actually need?
“Three to six months” is the range you will see everywhere, and it is a reasonable default. But the right number depends on how quickly your income could be replaced and how many people rely on it. Use the slider in the tool to set your own target; this table is a starting point.
| Situation | Months | Why |
|---|---|---|
| Two steady incomes, no dependants | 3 | One income can carry the essentials while the other is replaced. |
| Single income, dependants at home | 6 | Nobody else's pay cheque softens a job loss. |
| Freelancer, contractor or commission-based | 6–9 | Income is lumpy; dry spells of two or three months are normal. |
| Self-employed with staff or premises | 9–12 | Fixed business costs keep running while revenue recovers. |
| Retired, living off drawdown | 12+ | A cash buffer avoids selling investments in a downturn. |
| Renting, no debt, job in high demand | 3 | Low fixed costs and a fast route back into work. |
Fund first, or debt first?
Paying 24% on a credit card while holding cash that earns 4% feels wrong, and mathematically it is. But the fund is not competing with the card on interest — it exists so that the next surprise bill does not go on the card at all. The usual compromise: build a one-month starter fund, then throw everything at the expensive debt, then grow the fund to your full target.
Here is what the starter fund is protecting you from. A 1,500 car repair paid from savings costs 1,500. The same repair put on a card at 24% APR and cleared over 12 months costs roughly 180more in interest — and that is if nothing else goes wrong in the meantime. The loan calculator will show you the exact figure for any balance and rate.
Turning the gap into a monthly number
A gap of 12,000 is abstract. “1,000 a month for a year” is a standing order. The plan table shows what closing your gap costs per month over six, twelve and twenty-four months, and — if you add your income — what share of your pay that is. Anything above about 20% of income is flagged, because plans at that level tend to be abandoned by month three. A slower plan you keep beats a fast plan you drop.
Two habits make the plan stick: move the money on payday, before it can be spent, and keep it in an account you do not look at. Then come back here every few months — your accounts and expenses are saved, so updating the balances takes thirty seconds and you get to watch the runway grow. When it passes your target, redirect the monthly amount toward the long-term goals that an emergency fund exists to protect.
Frequently asked questions
How much should I have in an emergency fund?
The most common guidance is three to six months of essential expenses — rent or mortgage, loan payments, groceries, utilities, insurance and transport — held somewhere you can withdraw from within a day or two. Three months is a sensible floor for a two-income household with stable jobs; six months or more suits single-income homes, freelancers, contractors and anyone whose income is irregular. This calculator shows both benchmarks and lets you set your own target between one and twelve months.
Why does the calculator only count essential expenses?
Because an emergency fund exists to keep the lights on when income stops, not to keep every subscription running. In a real crisis you pause the optional spending first, so the target is based on what you would still have to pay. Marking Netflix, eating out or a gym membership as optional gives you an honest, smaller target — and shows exactly how much you would free up by pausing them.
Why do my fixed deposits not count toward the fund?
An emergency fund has to be reachable in days, not weeks. Money locked in a fixed deposit, a notice account, a pension or an investment may take time to access or cost a penalty to withdraw early, so it cannot pay next week’s rent. Mark those accounts as locked and the tool shows your runway both with and without them, so you can see what is genuinely available.
Where does my data go when I use this calculator?
Nowhere. The bank names, balances and expenses you type are stored in your browser’s local storage on this device only, so they are still there when you come back. Nothing is uploaded to a server, and there is no account. That also means it will not sync to another device, and clearing your browser data removes it — there is a Clear my data button on the page for shared computers.
Should I build an emergency fund before paying off debt?
Most planners suggest a small starter fund first — often one month of essentials — so that an unexpected bill does not go straight onto a credit card and undo your progress. Then direct the bulk of spare money at the highest-interest debt, and grow the fund to three to six months once that is under control. The calculator’s plan table shows what each timeline would cost per month so you can balance the two.
Does the calculator convert between currencies?
No. The currency selector changes how amounts are formatted — the symbol, decimal places and digit grouping, so rupees show lakh grouping like ₹1,00,000 — and it is remembered for next time. Every figure you enter is treated as being in that one currency; there is no exchange-rate conversion, because live rates would require sending data to a server.
This calculator provides general guidance based on widely used rules of thumb. It is not personal financial advice and does not know your full circumstances. Figures are only as accurate as the balances and expenses you enter.