Emergency fund calculator: how many months you need

Why a calculator for a rule of thumb

"Keep six months of expenses aside" is the advice everyone has heard. It is a reasonable default and a poor fit for many households. A freelancer with lumpy income, a single earner with two children and a home loan, and a two-income couple with no dependants do not need the same buffer. The emergency fund calculator starts at six months and adjusts for the things that change how long you might need the money.

The inputs

Four checkboxes follow, all unticked at first: I am self-employed or freelance, Mine is the only income in the household, There are two earners in the household, and We have no health insurance, or very little.

The first field matters most. The hint under it lists what counts: rent or EMI, utilities, groceries, fees, insurance and transport. Count only what you could not stop paying. Leave out eating out, travel and your SIPs, because pausing those is exactly what the fund lets you do.

The outputs

Three boxes: You should hold (the target, with the number of months under it), Still to save, and Currently covers (how many months your existing savings last). A short table repeats monthly essentials, "Months recommended for your situation" and the target.

Worked example: the defaults

With ₹60,000 of essentials and nothing ticked, the calculator recommends 6 months, a target of ₹3,60,000. The ₹2,00,000 already set aside covers 3.3 months, so ₹1,60,000 is still to save. The EMIs of ₹40,000 are 26.7% of take-home, below the threshold where they would add months.

How the months move

The rules, as the calculator applies them, in order:

1. Start at 6 months.
2. Add 2 if yours is the only income. Otherwise, take 2 off if there are two earners and you entered zero dependants.
3. Add 2 if EMIs are more than 40% of take-home.
4. Add 2 if you have little or no health cover.
5. Add 1 if you are over 50.
6. Then the floors: at least 9 months if self-employed, at least 9 if you are the only earner and have dependants.
7. Finally, keep the answer between 3 and 12 months.

The adjustments come before the floors on purpose. Otherwise a freelancer with no dependants could have the two-earner reduction undo the nine-month floor that variable income calls for.

Here is the same ₹60,000 household under different situations:

In the second row the only-earner rule gives 8 months, and the floor for an only earner with dependants lifts it to 9. In the last row the adjustments add up to 13 and the cap brings it back to 12. If you tick both "only income" and "two earners", the calculator uses only the first.

How to read the result

The target is a figure in today's money for today's expenses. Re-run it when rent, EMIs or school fees change, not only once.

The "Currently covers" figure is the more useful one if you are starting out: it tells you how long you could pay the bills with no income right now. Our first salary checklist puts building that buffer near the top of the list.

What it does not tell you

• Where to keep it. The note on the page suggests roughly a month in a savings account or sweep-in deposit, two months in a liquid or overnight fund, and the rest in a short deposit ladder, and not in equity. Our post on where to keep an emergency fund compares how fast each pays out and what each earned in the past year. The guide comparing overnight, liquid and ultra-short funds explains the differences in risk.
• Health shocks. The fund is not a replacement for health insurance; the calculator only adds months when cover is thin. Our post on health insurance super top-ups covers one way to raise cover.
• Irregular income in detail. The self-employed floor of nine months is a starting point. Freelancers with very uneven months should read emergency funds for irregular income, which works through a 12-month example.

The guide to the emergency fund and liquid funds covers the reasoning behind months of expenses as the unit. Once the target is set, the FD calculator helps size the deposit ladder. Put your own expenses into the emergency fund calculator and tick the boxes that apply. The result is a planning estimate, not advice.