How much cash should you keep for emergencies?

An emergency fund is boring. It sits there doing almost nothing. And that's exactly the point. It's not supposed to grow your wealth — it's supposed to stop you from losing it.

Without one, any unexpected expense — a broken boiler, redundancy, an emergency flight home — forces you into debt. Credit cards at 20%+, overdrafts, buy now pay later. The cost of not having an emergency fund isn't hypothetical — it's the interest you pay when life happens.

The standard rule is 3 months of essential costs. Not 3 months of salary — essential costs. The stuff you'd still need to pay if you lost your job tomorrow: rent, utilities, food, transport, insurance, minimum debt repayments.

Stretch it to 6 months if your income is less predictable — freelancers, contractors, commission-based roles, anyone without a notice period or statutory redundancy pay. Or if you have dependants who rely on your income.

Your emergency fund needs to be instantly accessible. That rules out fixed-rate accounts, investments, and LISAs (25% withdrawal penalty). The two good options:

Easy-access savings account — the simplest option. Rates are currently 4-5% at the best providers. Your money is there when you need it, same day or next day. It earns interest in the meantime. If you're a basic-rate taxpayer, the first £1,000 of interest is tax-free (Personal Savings Allowance).

Cash ISA — same accessibility, but all interest is tax-free regardless of amount. Worth considering if your total savings are above £20k and you're hitting the Personal Savings Allowance, or if you're a higher-rate taxpayer (£500 PSA only).

Either is fine. The important thing is that it's separate from your current account. If your emergency fund is sitting alongside your day-to-day spending, it'll get spent on non-emergencies. Put it somewhere you can see it but can't casually dip into.

Emergency fund. Always. Every time.

The logic is simple: if you invest £200/month but have no emergency fund, the first unexpected £500 expense goes on a credit card at 20%+ interest. You'd need your investments to return 20%+ just to break even — and they won't.

Get 1 month of cover first. Then you can start splitting: keep building the emergency fund while also beginning to invest. By the time you hit 3 months, your fund is done — redirect everything to investing, pension, or whatever your next priority is.

The exception: employer pension match. If your employer matches contributions and you're not contributing enough to get the full match, do that first. It's a guaranteed 100% return. Even while building an emergency fund, don't leave free money on the table.