The FIRE Bridge Fund Australia: How to Fund the Gap Between Early Retirement and Age 60

The bridge fund is the uniquely Australian element of FIRE planning that has no US equivalent. In the United States, retirement accounts can be accessed from 59½ with a 10% penalty, or earlier through various workarounds. In Australia, super is essentially locked until your preservation age — 60 for anyone born after 1 July 1964 — with very few exceptions.

If you want to retire at 45, you need 15 years of living expenses funded from outside super. That's your bridge fund: the investment portfolio that carries you from early retirement to the moment super becomes accessible.

Getting the bridge fund right is what makes the difference between a FIRE plan that works and one that runs out of money at 58.

What the bridge fund is

The bridge fund is your non-super investment portfolio — ETFs, shares, managed funds, property, bonds, or cash held in your own name (or in a family trust). It has two jobs:

1. Fund your lifestyle from early retirement until age 60
2. Grow enough to hand off cleanly to super drawdowns at 60

It doesn't need to last forever. Unlike a full FIRE portfolio that has to sustain indefinite withdrawals, the bridge fund has a defined end date. That makes it easier to size accurately.

Why this matters: the two-phase retirement

Australian FIRE operates in two distinct phases:

Phase 1 — Bridge period (early retirement to 60) You live off the bridge fund. Super sits untouched and keeps growing from investment returns (but not new contributions, since you've stopped working).

Phase 2 — Super drawdown (60 onward) You begin drawing from super. The bridge fund may be depleted by this point, or you can continue drawing from both if there's anything left.

This structure has important implications:

• Your bridge fund drawdown rate needs to match the number of years until 60
• Your super balance at retirement day needs to be large enough to grow — untouched — into a sufficient amount by age 60
• If your super is too small and your bridge fund runs out before 60, you have a problem

Sizing your bridge fund

The bridge fund only needs to last from your retirement date to age 60. If you retire at 48 and your preservation age is 60, your bridge fund needs to cover 12 years.

The key variable: drawdown rate vs investment return

If your bridge fund earns investment returns while you're drawing from it, you don't need 12 × annual expenses — you need less. The portfolio earns returns on the remaining balance as you draw down.

Bridge fund sizing formula:

Using a present value of annuity calculation at a given return rate:

Bridge fund needed = Annual expenses × [(1 − (1 + r)^−n) ÷ r]

Where r = annual real return rate, n = years until age 60.

Worked example:

• Annual expenses: $70,000
• Years until 60: 12
• Real return assumption: 4% (conservative, net of inflation)

Bridge fund = $70,000 × [(1 − (1.04)^−12) ÷ 0.04] = $70,000 × 9.385 = $657,000

At a higher return assumption (5% real): = $70,000 × [(1 − (1.05)^−12) ÷ 0.05] = $70,000 × 8.863 = $620,000

The bridge fund doesn't need to be the full 12 × $70,000 = $840,000 because it continues earning returns during the drawdown period.

Quick reference table (annual expenses of $70,000):

Years until 60	Real return 4%	Real return 5%	Real return 6%
5 years	$311,000	$303,000	$295,000
10 years	$567,000	$541,000	$515,000
15 years	$777,000	$725,000	$680,000
20 years	$950,000	$873,000	$803,000

Use our FIRE Calculator to model your complete plan including bridge fund and super components.

What goes in the bridge fund

The bridge fund sits outside super and is taxed at your personal marginal rate. The most common structure:

Core holdings:

• Broad Australian share ETFs (VAS, A200) — franking credits reduce effective tax rate
• International share ETFs (VGS, BGBL) — global diversification
• Possibly some high-quality bonds or a bond ETF for stability (especially as you approach 60 and need more certainty)

Avoided in most bridge funds:

• Property (illiquid — can't draw down $6,500/month from an investment property without selling)
• Term deposits for the bulk of holdings (too low return to sustain a 15-20 year draw)
• Single stock concentration (a few bad years of a single company isn't the right risk to take)

The bucket structure: Many FIRE retirees hold 1–2 years of expenses in cash or very short-term bonds. This acts as a buffer — in a market downturn, they draw from cash rather than selling ETFs at a loss. When markets recover, they refill the cash bucket from ETF sales at higher prices. This "bucket strategy" meaningfully reduces sequence of returns risk.

The interaction with super after 60

When you hit 60 and preservation age is reached, super becomes accessible. At that point you have options:

Option A — Transition to Retirement (TTR) pension at 60 Even before retiring fully, you can start drawing from super as a "transition to retirement income stream." This reduces your bridge fund drawdown while you continue working part-time.

Option B — Full retirement, access super At 60 (or whichever age you fully retire), convert super to a pension phase account. Pension phase earnings are tax-free. You begin drawing from super and the bridge fund (if any remains) runs in parallel.

Option C — Bridge fund depleted, rely on super alone Many people plan the bridge fund to be nearly zero at 60, transferring reliance fully to super at preservation age. This is fine — provided the super balance is sufficient.

The tax efficiency crossover: Super pension earnings are tax-free. Bridge fund earnings are taxed at marginal rates (though franking credits and the 50% CGT discount help). This means it's often more tax-efficient to run the bridge fund lower and keep more in super, drawing from super from 60. The balance depends on preservation age, return assumptions, and marginal tax rates during the bridge period.

Common bridge fund mistakes

1. Underestimating inflation in the bridge period A $70,000 lifestyle today costs $84,000 in 10 years at 2% inflation. Size your bridge fund for future-dollar expenses, not today's.

2. Ignoring the super accumulation during the bridge period Super keeps growing during the bridge period (from investment returns) even with no new contributions. Many people underestimate how much their super will be worth at 60 if left untouched. Factor this in — a $400,000 super balance at 45 becomes approximately $1.1M at 60 at 7% return.

3. Too conservative an allocation in the bridge fund A 15-year horizon is long enough to ride out significant market cycles. An all-cash or all-bond bridge fund won't generate enough real return to sustain a 15-year drawdown. Most of the bridge fund should still be in growth assets, with only 1–2 years in cash as a buffer.

4. Not accounting for tax on bridge fund income Bridge fund investment returns are taxed at your marginal rate. ETF distributions, dividends, and realised capital gains all appear in your tax return. In the early retirement years, with no other income, your marginal rate may be low — but it's not zero. Budget for tax.

5. Forgetting Centrelink During the bridge period (before 67), Centrelink income support (JobSeeker, low-income payments) is generally not accessible if you have substantial assets. Don't plan on Centrelink as a bridge fund safety net.

Frequently asked questions

What is a FIRE bridge fund in Australia?

The bridge fund is the investment portfolio held outside superannuation that funds your living expenses from your early retirement date until you reach preservation age (60 for most Australians) and can access super. It exists because super is preserved until 60 — if you retire at 45, you can't touch your super for 15 years, so the bridge fund covers that gap.

How much do I need in my bridge fund?

The bridge fund needs to sustain your annual expenses for the number of years until you turn 60, accounting for investment returns during the drawdown period. For $70,000/year in expenses and a 12-year bridge period at 4–5% real return, you need approximately $620,000–$657,000 at the start of your bridge period. Use our FIRE Calculator to model your specific situation.

What should I invest the bridge fund in?

The most common approach is a diversified portfolio of low-cost ETFs: broad Australian shares (for franking credits), international shares (for diversification), with 1–2 years of expenses held in cash as a buffer against bad market years. The bridge fund has a defined endpoint (your preservation age), which means you can plan the allocation around the drawdown timeline.

Can I access super before preservation age in Australia?

Generally no. Super is preserved until you reach preservation age (60 for most Australians) and meet a condition of release. Very limited early access is available under specific compassionate grounds or severe financial hardship — but these are tightly controlled and not a planning tool. The bridge fund is the correct solution, not early super access.

What happens to the bridge fund after 60?

At 60, when you can access super, most FIRE retirees begin drawing from super instead of (or alongside) the bridge fund. The bridge fund is designed to be close to zero at preservation age — all remaining capital is either spent or the residual provides a buffer. Super takes over the income generation role from 60 onward.

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This article is for general information only and does not constitute financial advice. Super access rules, preservation ages, and tax treatment can change. Consult a licensed financial adviser for personalised FIRE planning.