Your FIRE Number Australia: How to Calculate How Much You Need to Retire Early

Your FIRE number is the size of the investment portfolio that lets you stop working — the point where your invested assets generate enough return to fund your lifestyle indefinitely. For most Australians, it sits somewhere between $1.2 million and $2.8 million depending on your annual spending.

But unlike the US version of FIRE, Australian planning splits the number into two parts: the bridge fund (investments you can access now) and super (locked until 60). Getting the split right is what separates a workable Australian FIRE plan from one that runs out of money at 58.

The FIRE number formula

The starting point is the 4% rule: if you withdraw 4% of your portfolio in year one, then adjust for inflation each year, your portfolio has historically survived 30 years without running out. That means you need 25 times your annual expenses.

FIRE number = Annual expenses × 25

Most Australian FIRE planners adjust this to 3.5% withdrawal rate (28.5× expenses) for retirements lasting 40+ years. The 4% rule was based on US data and 30-year horizons — a 35-year-old retiring needs the money to last 50+ years, which calls for more conservatism.

Annual expenses	4% rule (×25)	3.5% rule (×28.5)	Conservative (×30)
$50,000	$1,250,000	$1,425,000	$1,500,000
$65,000	$1,625,000	$1,852,500	$1,950,000
$80,000	$2,000,000	$2,280,000	$2,400,000
$100,000	$2,500,000	$2,850,000	$3,000,000

What counts as "annual expenses"? Your current lifestyle cost, adjusted for what retirement looks like. Early retirees often spend more in the first decade (travel, activities) and less later. A common approach: use your current annual spending as the baseline.

Use our FIRE Number Calculator to calculate your personal target based on your expenses, withdrawal rate, and expected investment return.

Why Australia needs a two-part FIRE number

In Australia, super is locked until age 60 (preservation age for anyone born after 1 July 1964). You can't access it earlier except in very specific hardship circumstances.

This means if you retire at 45, you can't touch your super for 15 years. Your FIRE plan has to fund those 15 years from non-super investments only — the bridge fund.

The total FIRE number splits into:

Part 1 — Bridge fund (outside super) The amount you need in accessible investments (ETFs, shares, property) to fund living expenses from your early retirement date until you turn 60.

Part 2 — Super The amount you need in super at your retirement date, which will then grow untouched until 60 and fund the rest of your life.

Calculating your two-part FIRE number

The scenario:

Current age: 38
Target retirement age: 50
Annual expenses: $70,000
Investment return assumption: 7% nominal, 5% real

Step 1: Bridge fund (age 50 to 60 — 10 years)

You need enough in your bridge fund at age 50 to fund $70,000/year for 10 years (until super kicks in at 60), while the portfolio continues to earn returns.

A portfolio generating 5% real return covering 10 years of withdrawals needs roughly $560,000–$620,000 at age 50 (it doesn't need to be exactly 10 × $70,000 because it keeps earning returns during the drawdown period).

Step 2: Super (to fund from age 60 for the rest of life)

From 60 onward, your super takes over. At 60, you need enough in super to fund the rest of your retirement. Using a 3.5% withdrawal rate:

Super needed at age 60 = $70,000 ÷ 3.5% = $2,000,000

But you're retiring at 50 with 10 years until you can access super. So at age 50, you need super that will grow to $2M by age 60:

Super needed at age 50 = $2,000,000 ÷ (1.07)^10 = $2,000,000 ÷ 1.967 = $1,017,000

(At this point, employer SGC stops once you stop working — so super grows only from investment returns, not new contributions.)

Step 3: Total FIRE number at age 50

Component	Amount at age 50
Bridge fund (outside super)	~$590,000
Super needed at 50	~$1,017,000
Total portfolio needed	~$1,607,000

Of that total, roughly $590,000 must be in accessible investments and $1,017,000 in super. You can't swap them — super stays locked.

How the Age Pension changes the maths

From age 67, you may qualify for the Age Pension — even with a super balance, because the assets test has a homeowner threshold of approximately $301,750 (single, as at 2026). Couples have a higher threshold.

The full Age Pension for a single person is approximately $28,514 per year (2026). Even a partial pension reduces the amount your portfolio needs to produce.

If you factor in a full Age Pension from 67, your effective income shortfall drops from $70,000 to about $41,500/year from 67 onward. This means your super doesn't need to be as large — effectively reducing the total FIRE number.

Many FIRE planners model two scenarios:

Without pension (conservative): portfolio covers everything, pension is a bonus
With partial pension (moderate): assume ~50% of the full pension, reflects likely tapering

What spending level are you actually targeting?

The ASFA (Association of Superannuation Funds of Australia) Retirement Standard for 2026 estimates a comfortable retirement for:

A single person: approximately $54,240/year (homeowner)
A couple: approximately $77,375/year (homeowners)

This is a modest lifestyle — occasional domestic travel, a reliable car, some entertainment. Many early retirees budget $65,000–$90,000 to include international travel, higher activity spending, and greater buffer in the early years.

Early retirement spending typically follows a "smile curve" — higher in the active early years (50s–60s), lower in the quieter middle years (70s), then potentially rising again for healthcare in late retirement (80s+).

Adjusting your FIRE number for your situation

Lower number if:

You plan to do some part-time or casual work (even $15,000/year meaningfully reduces the required portfolio — see Barista FIRE)
You already have significant super and a short bridge period
You expect to downsize your home and invest the freed-up capital
You're comfortable with a higher withdrawal rate (4–4.5%) given your resilience and ability to reduce spending in a downturn

Higher number if:

You're retiring very early (30s) and need the portfolio to last 60+ years
You have significant future expenses (private school fees, medical costs, elderly parent care)
You want to leave an inheritance
You prefer a conservative withdrawal rate (3% or below)

The table that shows why savings rate is the real lever

How long it takes to reach your FIRE number depends far more on your savings rate than on investment returns. Here's years to FIRE from a zero starting balance at a 7% real return:

Annual income	Annual expenses	Savings rate	Years to FIRE (4% rule)
$120,000	$108,000	10%	~46 years
$120,000	$90,000	25%	~30 years
$120,000	$72,000	40%	~22 years
$120,000	$60,000	50%	~17 years
$120,000	$48,000	60%	~12 years

Cutting expenses does two things simultaneously: it increases your savings rate (building the portfolio faster) and it reduces your required FIRE number (lower annual expenses = smaller target). That double effect is why lifestyle optimisation is such a powerful tool in FIRE planning.

Frequently asked questions

What is a FIRE number?

Your FIRE number is the total investment portfolio value you need to achieve financial independence and retire early. It's calculated as your annual expenses multiplied by 25 (using the 4% safe withdrawal rate) or 28.5 (using the more conservative 3.5% rate). In Australia, the FIRE number splits into a bridge fund (accessible investments to use before 60) and super (accessible from 60).

How much do I need to retire early in Australia?

Using the 4% rule, you need 25 times your annual expenses. For a $65,000/year lifestyle, that's $1,625,000. For $80,000/year, it's $2,000,000. Many Australian FIRE planners use 3.5% (28.5× expenses) as a more conservative rate for retirements lasting 40–50 years. The Age Pension from age 67 may reduce the required portfolio size.

What is the 3.5% rule and why do Australians use it?

The 3.5% rule uses a 3.5% withdrawal rate instead of 4%, meaning you need 28.5× your annual expenses rather than 25×. Australians often use it because the 4% rule was designed for 30-year retirements using US market data. If you retire at 40, your portfolio needs to last 50+ years — a longer horizon that justifies a more conservative withdrawal rate. The Age Pension safety net from 67 partially offsets the need for such conservatism.

How does super affect my FIRE number in Australia?

Super is locked until age 60 (preservation age for most Australians). This means your FIRE number splits into two parts: a bridge fund of accessible investments to fund your lifestyle from early retirement until 60, and super to fund the rest of your life from 60 onward. You need both components to work — having $2M in super is useless if you retire at 45 with no bridge fund.

Should I include the Age Pension in my FIRE number calculation?

It's prudent to model both scenarios: one without the pension (purely portfolio-funded) and one with a partial pension from 67. Many FIRE planners don't rely on the pension in their primary model but treat it as a safety buffer. The assets test for a homeowner single is approximately $301,750 for the full pension — most FIRE retirees with a sizeable portfolio will receive at most a partial pension.

This article is for general information only and does not constitute financial, tax or legal advice. Individual circumstances vary. Consult a licensed financial adviser before making decisions based on this information.