Personal Finance · Basics — updated May 2026
Do you need an emergency fund? How much and where to keep it
The 3–6 month rule, why the right account matters (HISA vs mortgage offset), and how to build your buffer while still investing.
Why an emergency fund matters
An emergency fund is cash you keep specifically for unexpected, unavoidable expenses — a sudden job loss, a medical bill, a car breakdown, or an urgent home repair. Without one, any financial shock sends you to a credit card at 20% interest, or forces you to sell investments at potentially the worst possible moment.
The psychological value is just as real: knowing you have 3 months of expenses in accessible cash lets you invest the rest without anxiety. You can hold through a market downturn because you don't need to sell. This behavioural advantage compounds significantly over time.
Note
How much do you need? The 3–6 month rule
Single, stable employment, no dependants
Lower end is fine if you have in-demand skills and can find work quickly.
Couple, dual income, no dependants
Two incomes reduce risk — one partner can cover basics while the other job-hunts.
Single income household with dependants
Higher risk if income stops — more buffer needed.
Freelancer or contractor
Income gaps are common. Treat this as non-negotiable.
Business owner
Business cash flow is volatile. Personal emergency fund is separate from business reserves.
Count essential expenses only: rent/mortgage, utilities, groceries, transport, insurance, minimum debt repayments.
Where to keep it: renters vs homeowners
The right account depends on whether you have a mortgage.
Renters: High-interest savings account (HISA)
Look for accounts with no monthly fees and competitive rates — currently 4.5–5.5% for bonus-rate accounts from providers like ING, Macquarie, or RABOBANK. Read the conditions: most bonus rates require a minimum monthly deposit and no withdrawals. Keep your emergency fund in a separate account so you won't accidentally spend it.
Homeowners: Mortgage offset account
Every dollar in your offset reduces the interest on your mortgage. At a mortgage rate of 6.5%, a $20,000 emergency fund in your offset saves $1,300/year in interest — equivalent to earning 6.5% on that cash, after tax. This beats most savings accounts. The money remains accessible immediately; it's not locked in.
Important
Building your fund while still investing
You don't have to fully fund your emergency buffer before starting to invest. A practical middle ground: split discretionary savings — put 70% into your emergency fund until it reaches 3 months, then redirect those contributions into investments. Meanwhile, invest the other 30% from day one.
This approach means you're in the market sooner, capturing returns, while still building your safety net. The timeline depends on your savings rate — use the savings goal calculator to estimate how long it will take.
Tip
What counts as an emergency — and what doesn't
Frequently asked questions
How much should my emergency fund be?
The standard rule is 3–6 months of essential expenses — rent or mortgage, utilities, food, transport, insurance, and minimum debt repayments. Not your full lifestyle spending; just what you'd need to survive a job loss. For a single person with stable employment in a city, 3 months is often enough. For sole income households, freelancers, or people with dependants, aim for 6 months.
Should I use a savings account or mortgage offset for my emergency fund?
If you're a renter, a high-interest savings account (HISA) is your only meaningful option. If you own a home with a variable mortgage, an offset account is usually better: the money reduces your interest payable (effectively earning the mortgage rate — currently 6–7%) while remaining fully accessible. The interest you 'save' on a $30,000 offset balance at 6.5% is $1,950/year — far better than a HISA at 4–5%.
Can I count my redraw facility as an emergency fund?
Technically you can redraw extra repayments from most variable mortgages, but there's a catch: some lenders can restrict redraw access without notice, particularly if your financial situation changes. Offset accounts don't have this risk — the money is legally yours in a separate account. If you rely on redraw, check your lender's terms carefully and treat it as a backup, not a primary emergency fund.
Should I pay off debt or build an emergency fund first?
Build a small buffer first — at least $1,000–$2,000 — before aggressively paying down debt. Without any emergency buffer, a $500 car repair forces you onto a credit card at 20% interest, undoing weeks of debt repayments. Once you have a small buffer, focus on high-interest debt (credit cards, personal loans), then build the full 3–6 month fund, then invest.
What counts as an emergency?
Genuine emergencies: job loss, major medical expense, urgent car or home repair, emergency travel. Not emergencies: a holiday you didn't plan for, a sale on something you want, Christmas spending (that's predictable — budget for it separately). The discipline of only using the fund for true emergencies is what makes it work.
Can my emergency fund be invested?
No. The whole point of an emergency fund is immediate access without risk of loss. If your emergency fund is in ETFs and the market drops 30% the week you lose your job, you're forced to sell at the worst possible time. Keep it in cash — HISA or offset. Once you have 6 months covered in cash, invest everything above that.