Emergency Fund Calculator — How Much to Save
Enter your essential monthly expenses, how many months of cover you want, what you’ve saved, and how much you save each month. CalcWize works out your target fund, how many months you’re currently covered for, the gap, and how long to close it.
How many months you need
Three months of essential expenses is a sensible minimum, six is the common target, and twelve suits variable income, a single earner, or a tight job market. Base it on essentials only — the costs you couldn’t cut in a crisis.
Why it comes first
An emergency fund is the foundation of a financial plan: it stops a surprise — a car repair, a medical bill, a lost job — from becoming credit-card debt. Build at least a starter buffer before investing or aggressively paying down low-rate debt.
Where to keep it
Liquidity beats yield here. Keep the fund in an instant-access, high-interest savings account — not invested, where a downturn could shrink it exactly when you need it. The point is that it’s there, in full, on the day something goes wrong.
Common mistakes
Sizing the fund on total spending rather than essentials (overshooting); keeping it invested or hard to reach; and dipping into it for non-emergencies, so it’s never actually there when a real one hits.
Frequently asked questions
- How big should my emergency fund be?
- Three months of essential expenses is a floor, six is the usual target, and twelve suits variable income or a single earner. Size it on essentials, not total spending.
- Where should I keep it?
- In an instant-access, high-interest savings account — liquid and safe. Not invested, where a downturn could shrink it just when you need it.
- Emergency fund or pay off debt first?
- Build a small starter buffer (around one month) first, then balance topping up the fund against attacking high-interest debt. A buffer stops the next surprise from becoming new debt.
How we calculate it
Target fund = monthly essential expenses × months of cover. Current coverage = current savings ÷ monthly expenses. The gap is target minus current savings; time to target is the gap divided by your monthly saving.
What it doesn't do
- Investment or retirement savings (different goals, different accounts)
- Sinking funds for planned, expected expenses
- Insurance — a fund complements cover, it doesn’t replace it
Last reviewed: 2026-05