An emergency fund is money set aside for unexpected but inevitable expenses: car breakdown, boiler failure, job loss. Without it, these events force you into expensive debt at the worst possible time.
How Much Do You Need?
- 3 months: Stable employment, dual income, few dependants
- 6 months: Single income, variable income, or self-employed
- 12 months: Self-employed in volatile industry or significant health concerns
For most UK households with £1,800–£2,500 monthly essential spend, this means £5,400–£15,000.
Where to Keep It
Your emergency fund must be accessible within 1–3 working days. That means easy-access savings or Cash ISA. Best rates in 2026 are around 4.5–5%, so it earns while it waits.
Key TakeawayYour emergency fund should be boring, safe and accessible. It's not an investment — its job is to be there when you need it.
Building It Quickly
- Start with a £1,000 mini emergency fund — covers most single unexpected expenses
- Set up an automatic transfer on payday
- Bank any windfalls (bonus, tax refund) straight into the fund
- Treat it as a non-negotiable bill
✦ Try the QuidCast Tool
Emergency Fund Calculator
Enter your monthly essential expenses to calculate exactly how much you need — and how long it'll take to build.
🛡️ Calculate Your Emergency Fund →