How many months of expenses should I aim for?

Three months is a common minimum; six months is the standard recommendation; nine to twelve months is conservative and appropriate for single-income households, contractors, or anyone with variable income.

Should I include rent and mortgage in monthly expenses?

Yes — these are the largest essential expenses for most people and the whole point of the fund is to cover them when income stops. Include rent or mortgage, utilities, groceries, insurance, transport, and minimum loan payments.

What should I exclude?

Discretionary spending like dining out, streaming services, hobbies, and travel. The fund covers survival expenses, not your full lifestyle. Excluding these keeps the target realistic.

Where should I keep the money?

In a high-yield savings account or money market fund — somewhere you can access within a day, but not your checking account. Avoid investing it in stocks; the fund needs to be there when markets are down, which is often exactly when emergencies hit.

Does the tool save anything?

No. All math runs locally in your browser. Your income and expense numbers never leave the page.

Emergency Fund Calculator

Find your emergency fund target from monthly expenses and estimate time to reach it.

Written by Golam Rabbani, Founder & Lead Engineer

This interactive tool requires JavaScript. Read the formula and worked example below; you can compute the result by hand.

How to use this emergency fund calculator

Enter your essential monthly expenses (rent, groceries, utilities, insurance, transport).
Choose how many months of coverage you want — 3 is a common minimum, 6 is standard.
Enter what you already have set aside (zero if starting fresh).
Optionally enter how much you can save each month to estimate time to reach the goal.
Press Calculate to see the target, remaining gap, and months to reach it.

About this emergency fund calculator

The emergency fund calculator answers two related questions: how big should my emergency fund be, and how long will it take me to build it? The size question is straightforward — multiply your essential monthly expenses by the number of months of runway you want to feel comfortable about a job loss, surprise medical bill, or major car repair.

Worked example: essential monthly expenses of $3,000 with a 6-month target gives a fund of $18,000. If you already have $4,200 set aside, the remaining gap is $13,800. Saving $500 a month, you would reach the full target in ceil(13,800 ÷ 500) = 28 months — a little over two years.

To see why the month-count matters, consider two households with the same $3,000 monthly essential expenses. Household A targets 3 months ($9,000) and already has $2,000 saved — they need $7,000 more, taking 14 months at $500/month. Household B targets 6 months ($18,000) from the same $2,000 start — they need $16,000 more, taking 32 months. The calculator makes both scenarios concrete so you can decide which target fits your risk tolerance. Use only essentials in the expenses figure (skip discretionary spending like restaurants and subscriptions), because the fund is meant to keep the lights on, not maintain your full lifestyle. The tool runs entirely in your browser.

FAQ

How many months of expenses should I aim for?: Three months is a common minimum; six months is the standard recommendation; nine to twelve months is conservative and appropriate for single-income households, contractors, or anyone with variable income.
Should I include rent and mortgage in monthly expenses?: Yes — these are the largest essential expenses for most people and the whole point of the fund is to cover them when income stops. Include rent or mortgage, utilities, groceries, insurance, transport, and minimum loan payments.
What should I exclude?: Discretionary spending like dining out, streaming services, hobbies, and travel. The fund covers survival expenses, not your full lifestyle. Excluding these keeps the target realistic.
Where should I keep the money?: In a high-yield savings account or money market fund — somewhere you can access within a day, but not your checking account. Avoid investing it in stocks; the fund needs to be there when markets are down, which is often exactly when emergencies hit.
Does the tool save anything?: No. All math runs locally in your browser. Your income and expense numbers never leave the page.