Emergency Fund Calculator
Calculate how big your emergency fund should be and how long it will take to save. Enter expenses, coverage months and savings rate. Free, with the formula shown.
Updated 2026-06-14 · Free · No sign-up · Runs privately in your browser
Show the formula & steps
How the Emergency Fund Calculator Works
This calculator tells you how large your emergency fund should be and how long it will take to get there. Enter your monthly essential expenses, the months of coverage you want, your current savings, and your monthly contribution. It returns your target fund, the amount still needed, and the time to reach your goal.
An emergency fund is cash set aside for unexpected events, such as a job loss, a medical bill, or a major repair, so you avoid going into debt when life happens.
The Formula
Target fund = monthly essential expenses × months of coverage
Months to goal = (target − current savings) ÷ monthly contribution
The gap is the target minus what you already have, never less than zero. Dividing the gap by your monthly contribution gives the number of months to fund it, rounded up to the next whole month.
Worked Example
Suppose your essential expenses are $3,500 a month, you want 6 months of coverage, you already have $4,000 saved, and you can add $500 a month:
- Target fund = 3,500 × 6 = $21,000
- Still needed = 21,000 − 4,000 = $17,000
- Time to goal = 17,000 ÷ 500 = 34 months, rounded up to 34 months (about 2.8 years)
You are already 19% of the way to the goal.
How Many Months Should You Save?
| Situation | Suggested coverage |
|---|---|
| Stable dual income, no dependents | 3 months |
| Single income or some risk | 4 to 6 months |
| Variable income or self-employed | 6 to 12 months |
| Sole earner with dependents | 6 to 12+ months |
Tips for Building Your Fund
- Automate transfers on payday so saving happens before you can spend the money.
- Start with a starter fund of about $1,000, then build toward the full target.
- Keep it liquid in a high-yield savings account, separate from your everyday checking.
- Replenish quickly after any withdrawal so the fund is ready for the next surprise.
Frequently asked questions
How much should I have in an emergency fund?+
A common guideline is three to six months of essential living expenses. If your essential costs are $3,500 a month, a six-month fund is 3,500 × 6 = $21,000. People with variable income or dependents often aim for the higher end or beyond.
How is the emergency fund target calculated?+
Multiply your monthly essential expenses by the number of months of coverage you want. Essential expenses include housing, utilities, food, insurance, transport, and minimum debt payments, not discretionary spending like dining out or vacations.
How long will it take to build my emergency fund?+
Subtract your current savings from the target to get the gap, then divide by your monthly contribution. To save a $17,000 gap at $500 a month takes 17,000 ÷ 500 = 34 months, rounded up. Increasing the contribution shortens that time proportionally.
What counts as an essential expense?+
Essential expenses are the costs you must keep paying if your income stops: rent or mortgage, utilities, groceries, insurance, transportation, and minimum loan or credit card payments. Leave out subscriptions, entertainment, and other discretionary spending when sizing the fund.
Where should I keep my emergency fund?+
Keep it somewhere safe and liquid, such as a high-yield savings account or money market account, so you can access it instantly without losing value. Avoid investing emergency money in stocks, since you may need it during a downturn when prices are low.