What is FIRE? Financially Independent, Retire Early - explained.
A plain-English guide to the FIRE movement, your FIRE number, and what it means for Australians.
FIRE stands for Financially Independent, Retire Early. It's a financial strategy and a growing movement focused on saving and investing aggressively so you can choose to stop working earlier than traditional retirement age.
What does financial independence actually mean?
Financial independence means having enough money invested that the returns from your portfolio can cover your living expenses indefinitely without you needing to work. It doesn't mean being rich. It means being free. Free to work because you want to, not because you have to.
The most common rule of thumb is the 4% rule (also known as the 25× rule). Research from the Trinity Study found that if you withdraw 4% of your portfolio in the first year of retirement and adjust for inflation each year after, your money has a very high probability of lasting at least 30 years. Working backwards: if you need $60,000 per year to live, you need $60,000 × 25 = $1,500,000 invested.
The “Retire Early” part is optional. Plenty of people pursuing FIRE have no intention of quitting work entirely. They want the freedom to choose: to take a lower-paying job they love, start a business without financial pressure, take a year off, or simply know they'll be okay if they lose their job. Financial independence is the destination; early retirement is just one of many things you can do once you get there.
The 6 types of FIRE
Not everyone pursues FIRE the same way. Here are the six most common approaches.
Lean FIRE
Retire early on a lean budget, typically under $40,000 per year for singles or $55,000 for couples. Requires a smaller nest egg ($750k-$1.4M), but leaves little room for surprises. Aligns closely with the ASFA Modest Retirement Standard ($35,503 for singles, $51,299 for couples). Best suited to people who are naturally frugal and comfortable with a minimalist lifestyle.
Fat FIRE
Retire early without compromising your lifestyle. Fat FIRE typically means $120,000-$200,000+ per year in retirement, requiring a portfolio of $3M-$5M or more. Think travel, dining out, premium healthcare, and full lifestyle freedom. Popular with higher earners who want their retirement to match or exceed their working-life standard of living.
Barista FIRE
Semi-retire by building a portfolio that covers part of your expenses ($625k-$1.25M), then work part-time for the rest. The name comes from the idea of working at a coffee shop, not for the salary, but for structure, social connection, and (in the US) health insurance. In Australia, Medicare means this is purely about lifestyle balance and escaping full-time work sooner.
Coast FIRE
You have saved and invested enough ($350k-$700k depending on your age) that compound growth alone will carry your portfolio to your FIRE number by traditional retirement age, even if you never save another dollar. From this point, you can coast - work a lower-stress job, go part-time, or earn just enough to cover current expenses. It is not early retirement, but it is early freedom from the pressure to save.
Flamingo FIRE
An Australian-originated strategy. Save aggressively until you hit half your full FIRE number (12.5x your annual expenses), then semi-retire. Work just enough to cover living expenses while your portfolio compounds untouched over 10-12 years. The key difference from Barista FIRE: you never draw from the portfolio during semi-retirement, so it doubles to your full FIRE goal through compound growth alone.
Regular FIRE
The standard FIRE path. Accumulate 25 times your annual expenses and fully retire from paid work. For most Australian couples this means $75,000-$115,000 per year in retirement with a portfolio of $1.9M-$2.9M. The ASFA Comfortable Retirement Standard ($75,506 for couples) sits right in this range.
Your FIRE number
Your FIRE number is the total amount you need invested to sustain your lifestyle indefinitely without working. The simplest way to calculate it: take your annual expenses and multiply by 25.
Annual expenses × 25 = Your FIRE number
$60,000 × 25 = $1,500,000
That $1.5 million figure assumes you're drawing down from a single investment portfolio. But if you're an Australian, your situation is different, and often better. Your superannuation balance is growing tax-effectively in the background, and depending on your assets at age 67, you may qualify for the Age Pension. Both of these reduce the amount you actually need in accessible (non-super) investments to bridge the gap to preservation age.
This is exactly what ProjectFi calculates. Instead of a single “FIRE number” pulled from a US blog, ProjectFi models your super separately, accounts for the gap between your target retirement age and when your super becomes accessible, and factors in the Age Pension, giving you a much more accurate picture of what you actually need.
FIRE in Australia - what's different
Most FIRE content online is written for Americans. If you're Australian, the rules are fundamentally different, and in many ways, they work in your favour.
Superannuation
Your super is locked until your preservation age (currently 60 for most people). That means if you want to retire at 45, you can’t touch your super for 15 years. You need a separate “bridge” portfolio of non-super investments to cover your expenses from retirement until your super kicks in. Most US FIRE calculators don’t model this - they assume all your money is accessible.
Age Pension
If you retire with modest assets, you may qualify for the Australian Age Pension at 67. Even a partial pension can be worth $15,000-$25,000 per year for a single person. This dramatically reduces how much you need saved, but only if your planner actually models the assets test and income test. ProjectFi does.
Tax Advantages
Australian tax rules are genuinely favourable for long-term investors. Franking credits mean you effectively get credit for tax already paid on dividends. The 50% CGT discount means you only pay tax on half your capital gains for assets held over 12 months. And super withdrawals after age 60 are completely tax-free. These differences mean the maths for Australian FIRE are significantly more favourable than what US-centric calculators suggest.
Is FIRE right for you?
FIRE isn't about extreme frugality or eating rice and beans until you're 35. It's about intentionality: being deliberate about how you earn, spend, save, and invest so that work becomes a choice rather than a necessity.
You don't need to aim for retirement at 35 (though some people do). Even moving your retirement from 67 to 55 buys you twelve extra years of freedom, and that's life-changing. FIRE is a spectrum. Every dollar you invest and every year you shave off brings you closer to a fundamentally different relationship with work and money.
The first step is knowing your numbers. Where are you now? What would it take? How long will it actually be? That's what a good FIRE planner helps you answer.
Ready to calculate your FIRE date?
ProjectFi models your super, tax, and Age Pension, so your FIRE number is actually based on Australian rules, not American ones.
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