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Emergency Fund Calculator

Size an emergency fund from essential monthly costs and the months of cover you want.

About Emergency Fund Calculator

The fund is sized on essential spending rather than total spending, because discretionary costs stop in an emergency. Three months is the usual floor and six is the common target, with more for variable or single-income households. An emergency fund is what stops a temporary shock becoming permanent debt, and it is the prerequisite for taking any investment risk elsewhere.

Formula

Emergency Fund

Target = essential monthly expenses × months of cover wanted

essential expenses
Costs that continue regardless of income, excluding discretionary spending

Worked example

With the default values below, Emergency Fund Calculator returns Emergency Fund Target of $15,600.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Essential monthly expensesminimum 0
2,600
Months of cover wantedaccepts 1–24 months
6 months
Emergency savings heldminimum 0
8,000
Monthly amount you can saveminimum 0
400

Results

Emergency Fund Target
$15,600.00
Shortfall to the Target
$7,600.00
Months to Reach the Target
19.0 months
Cover You Have Today
3.1 months
Progress Toward the Target
51.3%

Step by step

  1. 1Values used
  2. 2Emergency Fund
  3. 3Emergency Fund Target= 15,600.00
  4. 4Shortfall to the Target= 7,600.00
  5. 5Months to Reach the Target= 19.0 months
  6. 6Cover You Have Today= 3.1 months
  7. 7Progress Toward the Target= 51.3

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is Emergency Fund calculated?

Target = essential monthly expenses × months of cover wanted The fund is sized on essential spending rather than total spending, because discretionary costs stop in an emergency. Three months is the usual floor and six is the common target, with more for variable or single-income households.

Why does Emergency Fund matter?

An emergency fund is what stops a temporary shock becoming permanent debt, and it is the prerequisite for taking any investment risk elsewhere.

What values do I need to enter?

This calculator takes 4 inputs: Essential monthly expenses, Months of cover wanted, Emergency savings held, Monthly amount you can save. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.

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