Safety Net Calculator

Why your emergency fund target is personal

"Three to six months of expenses" gets repeated everywhere, but it's vague enough to be almost useless on its own. Three months for whom? Total spending or just the essentials? ASIC MoneySmart sets three months as the benchmark for most Australians, and that's a solid floor to work from. But your actual number depends on your expenses, your income and who's relying on you, which is exactly why this calculator gives you a range instead of a single figure.

The calculator uses essential expenses, not everything you spend, because your emergency fund exists to keep the lights on and the roof over your head if income stops, not to fund your current lifestyle. Using total spending inflates the target unnecessarily and makes the goal feel further away than it needs to be.

Three months or six? How to pick

Three months is the right starting target for most PAYG employees in stable work with a dual-income household and no mortgage. It covers the most common emergencies: a stretch of unemployment, a big repair bill, a medical event that keeps you off work for a few weeks.

Six months makes more sense once any of these apply to you:

• You've got a mortgage. Missing a repayment has serious consequences, so the buffer needs to be bigger.
• You have dependants. More people relying on your income means less room to improvise if it stops.
• You're a single-income household. A dual-income household has a built-in backup if one job disappears. A single income doesn't.
• You're self-employed. No sick leave, no redundancy pay, no employer super if the work dries up. Income can be lumpy, and quarterly BAS bills can land at the worst possible time. Many financial planners suggest nine to twelve months for sole traders in volatile industries, six months is the minimum.
• Your industry is volatile. Construction, hospitality and media all tend to have faster redundancies and slower re-employment than average.

There's also a Centrelink quirk worth knowing: JobSeeker has waiting periods before your first payment, including a longer wait if your savings sit above certain thresholds. That gap has to be covered from somewhere, and your emergency fund is the obvious answer. Our full guide to sizing an emergency fund goes deeper on how long a real Australian job search actually takes.

A worked example: from monthly budget to savings target

Here's how the numbers play out for a household spending $4,200 a month on essentials.

Once you know your monthly number, the targets are straightforward: multiply by three or by six. Here's how long each one takes to reach at a few different savings rates.

Source: ASIC MoneySmart. Figures assume a household spending $4,200/month on essentials, savings compounding effects ignored for simplicity.

A few things jump out here. Saving $500 a month toward a 6-month target takes over four years, which is exactly why starting early matters more than the amount you start with. Bump that to $1,000 a month and it drops to just over two years. And if you can throw windfalls at it, a tax refund, a bonus, an inheritance, straight into the fund, you can shave months off any of these timelines. Even MoneySmart's own example proves the point: saving $20 a week gets you over $1,000 in a year. That's not a full emergency fund, but it's a real start.

Plug your own numbers into the calculator above to see your personalised target and timeline.

Where to actually keep your emergency fund

The right account matters almost as much as the amount. Your emergency fund needs to be accessible, earning something, and mentally separate from your everyday spending money.

A high-interest savings account is the default recommendation from ASIC MoneySmart, kept separate from your everyday transaction account so it's not one tap away from disappearing into groceries money. Our guide to choosing a high-interest savings account covers exactly what to check before you pick one, including the bonus-rate traps that catch people out.

A mortgage offset account is arguably the most efficient option if you have a home loan. Every dollar sitting in offset reduces the interest you pay, effectively earning you a return equal to your mortgage rate, which usually beats any savings account. MoneySmart explicitly recommends this approach. The catch: it's psychologically harder to ring-fence than a separate account at a different bank, so it only works if you're disciplined. Our offset account vs redraw guide explains how offset accounts actually work if you're not sure.

A term deposit usually doesn't work, however tempting the rate. Term deposits lock your money away for a fixed period, and breaking the term early typically forfeits interest, sometimes all of it. If your car dies on a Tuesday and your term deposit matures in six weeks, you've got a problem. Keep term deposits for goals with a known timeline, not for the fund you need at zero notice.

Common mistakes to avoid

• Investing it in shares or ETFs. Markets can fall 20 to 30% right when you need the money most, job losses and market crashes often show up together. Your emergency fund is insurance, not an investment. Keep it in cash.
• Not having one at all. The most common mistake by far. Every month without a buffer is a month where a single unexpected bill can send you into debt.
• Keeping too much in cash. Once you've hit your target, extra cash beyond that is usually better used paying down high-interest debt or investing. Holding $50,000 when your target is $12,600 has a real cost: that excess is quietly losing purchasing power to inflation.
• Dipping into it for non-emergencies. A sale at your favourite store is not an emergency. A planned holiday is not an emergency. Protect the fund's purpose ruthlessly, once it becomes a general savings account, it stops working as a safety net.