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What's an Emergency Fund
and How Much Do You Actually Need?
An emergency fund is the financial concept most people agree with and fewest people actually have. Here's what it is, the rule of thumb, why the rule of thumb might be wrong for you, and where to keep it.
The expensive consequences of not having one
Something goes wrong. The car needs a $2,000 repair. The hot water system gives up. A medical bill arrives that wasn't expected. It's not a question of whether these things happen - it's a question of whether you have money set aside when they do.
Without an emergency fund, the options are credit card debt, a personal loan, asking a family member, or dipping into long-term savings at the wrong time. All of these options cost more than having the money ready - either in interest paid, in the compounding growth lost from liquidating investments early, or in the relationship strain of borrowing from people you know.
An emergency fund isn't a savings goal in the conventional sense. It's liquidity insurance. The return isn't measured in interest earned - it's measured in expensive alternatives avoided.
The 3-6 month rule - and when it doesn't apply
The standard advice is a starting point, not a universal answer.
The standard guidance is to keep 3 to 6 months of essential expenses in an accessible account. Essential expenses means the things you'd still need to pay if your income stopped tomorrow - rent or mortgage, utilities, groceries, insurance, minimum loan repayments. Not discretionary spending.
Three months is a reasonable starting target for someone in stable employment with a partner who also works. Six months is more appropriate if you're self-employed, a contractor, the sole income earner in a household, or in an industry with volatile employment. The more variable your income or the longer it would realistically take to replace it, the larger your buffer should be.
Stable employment
Permanent role, dual income household, industry with low unemployment. Three months covers most disruptions.
Variable income
Contractor, sole income earner, senior role with longer recruitment cycles. Six months gives breathing room to find the right next step.
Self-employed
Business owner, freelancer with seasonal income, or anyone whose income can stop abruptly without notice. Higher buffer, higher peace of mind.
What counts as an essential expense
The calculation only works if you're using the right number.
Essential expenses are what you'd spend in a month if you were trying to keep the lights on and nothing else. Not what you currently spend - what you'd spend if you had to cut everything non-essential.
Include these
Rent or mortgage repayments
Electricity, gas, water
Groceries (basics, not dining out)
Internet and mobile phone
Health insurance premiums
Minimum loan repayments
Childcare or school fees
Essential medications
Exclude these
Dining out and takeaway
Subscriptions you could cancel
Gym memberships
Entertainment and events
Clothing beyond basics
Travel and holidays
Discretionary shopping
Extra loan repayments
The calculation: add up your essential monthly expenses, multiply by 3 (or 6, or 12 depending on your situation). That's your target. It's usually less alarming than people expect once you strip out the discretionary spending.
Where to keep it
Accessible, but not too accessible.
An emergency fund needs to be accessible quickly - within 24 to 48 hours at most. That rules out term deposits with lock-up periods and investment accounts where market timing matters. It also rules out your everyday transaction account, where the money is too easy to spend before an actual emergency arises.
A high-interest savings account at a separate bank from your everyday banking is the conventional recommendation. The friction of logging in to a different institution is small enough that a genuine emergency isn't inconvenient, but large enough that you won't drain it for a spontaneous purchase.
While it's sitting there, it should be earning something. A savings account with a competitive rate means your emergency fund isn't just idle - it's growing slowly while it waits to be needed.
High-interest savings
Best default option. Accessible within 24-48 hours. Earns interest while waiting. Compare rates on Canstar or RateCity.
Offset account
If you have a mortgage with an offset feature, keeping the emergency fund here reduces your interest bill. Effective, but be disciplined about not raiding it for non-emergencies.
Not here
Superannuation (can't access it), shares (market timing risk), term deposits with penalties, or your everyday transaction account (too easy to spend).
Building it when you don't have it
You don't need to fund it all at once.
If the target feels out of reach, start with a smaller goal. $1,000 in a separate account handles most minor emergencies - a car repair, an unexpected medical bill, a broken appliance. That alone removes the need for credit card debt in most situations.
From there, automate a fixed amount per fortnight into the account. It doesn't have to be large. $100 per fortnight over a year is $2,600. Alongside interest, that builds meaningful buffer without requiring a dramatic lifestyle change.
Tax returns, bonuses, and any other irregular income sources are an opportunity to accelerate the fund without affecting everyday cash flow. Deposit it before you have a chance to spend it on something else.
This content is general information only and not personal financial advice. Consider your own circumstances and consult a licensed financial adviser where appropriate.
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