Emergency Fund Calculator with Life-Shock Runway Simulator

When to use this Emergency Fund & Runway

Common use cases

• Measure months of expenses saved
• Simulate job loss or medical bills
• Plan months to a 3–6 month target

Localized examples

• Any currency
• User-defined expense and income amounts

What you get

• Life-shock simulator
• Runway chart
• Months-to-target estimate

Who this is for

Households sizing a cash buffer after a job change, move, or new dependent—anyone who needs months of runway, not a generic “save more” slogan.

Worked example

Liquid savings $12,000 and essential expenses $3,200 → about 3.8 months of runway. A job-loss shock that zeros income shows how fast that buffer burns if spending stays fixed.

How to read the runway number

Runway months = liquid savings ÷ monthly essentials. Treat it as a planning range. If your income is commission-based or freelance, aim higher than a dual-income W-2 household with the same expenses.

Use shocks as decision tools

The life-shock controls exist so you can rehearse bad months before they happen. If a medical bill or rent hike collapses runway below three months, that is a signal to cut fixed costs or pause aggressive investing—not a moral failure.

Common pitfalls

• Sizing the fund from lifestyle spend instead of essentials
• Counting illiquid investments as emergency cash
• Stopping debt payoff forever while oversaving in low-yield cash