Emergency Fund Calculator

Compound interest needs both a meaningful balance and enough time to make a visible dent, and an emergency fund built from a modest starting balance over a relatively short horizon (often under three years) doesn't give the interest rate much to work with. The bulk of the progress toward the goal comes from your own monthly contributions, not from what the bank pays you -- which is a very different dynamic than, say, a 30-year retirement account, where compounding dominates.

The commonly cited range is 3-6 months, but the right number depends on factors this calculator doesn't ask about: how stable your income is, whether you have a single earner or two in the household, and how quickly you could realistically find comparable work if you lost your job. Freelancers, commission-based earners, and single-income households are frequently advised to target the higher end (6-12 months) given the greater uncertainty in when income would resume.

This calculator multiplies whatever you enter as Monthly Expenses directly, so the honesty of that number matters more than the target-months slider. Using your full current spending (including discretionary categories) produces a bigger, more conservative goal; using only essential costs -- housing, food, utilities, insurance, minimum debt payments -- produces a leaner goal that's faster to reach but assumes you'd cut non-essentials immediately in a real emergency, which is a real behavioral assumption to test against your own habits.

With $0 in Monthly Savings and a goal not yet fully funded, the math has no finite answer -- contributions of zero never close a positive gap, no matter how much time passes. This calculator surfaces that as a large placeholder figure rather than showing a small number, since a small number would misleadingly suggest the goal is close when it is, in fact, not being approached at all.