Calculate emergency fund

Size a cash reserve from essential monthly expenses and calculate whole months needed to close its shortfall.

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ToolEmergency Fund Calculator
Input
Output
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Preview

How it works

Essential expenses multiplied by chosen cover months set the target, while current savings divided by expenses show existing cover. Shortfall divided by monthly contribution rounds upward to a whole month; savings and contribution default to 0, and the visible three-month target remains editable.

Formula
target cash = monthly essential expenses × target months
  • Only essential spending belongs in the denominator if the goal is loss-of-income cover.
  • No investment return is added because emergency reserves are modeled as immediately available cash.

Worked example

1,500 monthly expenses, 2,000 saved
A six month target, saving 300 a month towards it
Input
											Monthly essential expenses: 1500
Current savings: 2000
Target months: 6
Monthly contribution: 300
Output
												Target amount: 9000
Current months covered: 1.33
Shortfall: 7000
Months to target: 24
Assumed target months: 6

When to use this

Household essential-cost budgets, job-change planning, and self-employed cash reserves use rent, food, utilities, and transport to estimate income-gap cover.

Edge cases

  • If savings already meet the target, shortfall and months to target are both 0 even with no contribution.
  • If a shortfall exists and contribution is 0, processing stops because no finite completion month exists.
  • A fractional final month rounds upward because a partial monthly contribution does not yet fund the complete target.