Work out your real safety-net number — months of essential expenses, not salary — and a realistic date for having it.
An emergency fund exists to keep the essential machinery running — housing, food, heat, transport — while income is interrupted or a large surprise lands. In an actual emergency you'd cut the extras immediately, so sizing the fund on your full salary over-shoots the target and makes it feel impossibly far away. Sizing it on essential spend gives you a smaller, honest, reachable number.
If the "you can save per month" box was hard to answer, that's the budget talking — a zero-based budget will find the number, and the subscription audit usually funds the first milestone by itself.
target = essential monthly spending × months of cover, gap = target − already saved, and time = gap ÷ monthly saving, rounded up to whole months. Interest on the fund is ignored, which keeps the date cautious.
Essential spending of $1,800 a month, $500 already saved and $150 a month set aside:
| Cover | Target | Still to save | Fully funded in |
|---|---|---|---|
| 3 months | $5,400 | $4,900 | 33 months (2 years 9 months) |
| 6 months | $10,800 | $10,300 | 69 months (5 years 9 months) |
The starter milestone, one month of essentials, is $1,800, which at $150 a month is reached in 9 months. Hitting the first milestone is what turns most surprises from new debt into an annoyance.
Choose £ for the UK, or $ for Canadian and Australian dollars. Keep the fund somewhere instantly reachable: an easy-access savings account (in the UK a Cash ISA can be one, and in Canada a TFSA savings account can be) at a bank that is covered by deposit protection. The limits at the time of writing are up to £120,000 per person per authorised firm from the FSCS in the UK, up to $100,000 per category from CDIC in Canada, and up to $250,000 per account holder per institution from the Financial Claims Scheme in Australia. Check your own bank and the scheme's website for the current position.
The common guidance is 3–6 months of essential expenses: 3 months if your income is stable and you have a second earner in the household, 6 or more if you are self-employed, on variable income, or the sole earner. Note it is months of essential expenses — rent, food, utilities, transport, insurance, minimum debt payments — not months of salary.
Somewhere boring and instantly reachable: an easy-access savings account, ideally at a different bank from your current account so it is not one tap away. Not investments (they can be down exactly when you need them) and not cash under the mattress. This is general information, not financial advice.
A common approach: build a small starter fund first (around one month of essentials or $1,000) so a surprise doesn’t become new debt, then attack high-interest debt hard, then return and build the full 3–6 months. High-interest credit card debt usually costs more than savings earn.
Unexpected, necessary, urgent — job loss, a boiler failure, an emergency vet bill, essential travel. A sale is never an emergency. Naming the account "Emergencies only" genuinely helps.
Work out your essential monthly spending in pounds, choose 3 to 6 months of cover (more if your income is variable), and multiply. Our UK article prices four different answers for one household: how much emergency fund do I need? Four answers, priced.
The same method applies in any currency: essential monthly spending times the months of cover that suit your risk. Choose the $ option, keep the money in an easy-access account, and check that the account is covered by your country’s deposit protection scheme.