hakluke@~

~$ finance/fire

When can I stop working? πŸ”₯

The whole FIRE idea in one page: a portfolio big enough that a safe annual draw covers your spending, forever. This works out the target, when you hit it, and how much of the final pile is compounding doing your job for you β€” all in today’s dollars, so the goalposts don’t move while you watch.

Saved

Fill in Your numbers. The Assumptions have sensible defaults β€” open them only if you want to argue with one.

Your numbers

Assumptions all set for you β€” change any if you disagree

Growth & the rule

Together those make a real return of β€” β€” that’s the number doing the actual work here.

Crunching…

Verdict

Crunching…

FI number β€”
Years to go β€”
Age at FI β€”
Coast FIRE number β€”

The climb

everything in today’s dollars
Portfolio FI target

The target holds still because everything is inflation-adjusted. In the dollars of the day you’d actually need β€” by then.

Who builds the pile

measured at the day you hit the target
You put in β€”
Compounding added β€”

Argue with the 4% rule

same portfolio, different draw

Lower draw, bigger target, safer retirement β€” pick your paranoia level.

What the return assumption is worth

Years to the target across nominal returns, your inflation held constant. A flat line at 60 means “not inside 60 years”.

How this works

  • Everything is in today’s dollars. The nominal return you enter is converted to a real return β€” (1 + return) Γ· (1 + inflation) βˆ’ 1, not a lazy subtraction β€” and growth is compounded at that. It means the target never moves and every figure on this page is money you can feel the size of.
  • Your contributions track inflation. The monthly amount is held constant in real terms, which in cash terms means it creeps up with inflation the way a salary-linked habit actually does. If your savings won’t grow with your pay, the timeline stretches.
  • The 4% rule is an observation, not a law. It comes from backtesting US retirements: a portfolio of shares and bonds survived 30 years in almost every historical window when the draw started at 4% and rose with inflation. It has failure modes β€” long retirements, bad early years (sequence-of-returns risk), and fees all eat into it. The table above lets you pick a more or less nervous number.
  • Coast FIRE is the balance where you could stop adding money entirely and compounding alone would finish the job by 60. Past that point, work is funding your lifestyle, not your retirement.
  • Tax isn’t modelled. Dividends and realised gains along the way are taxed at your rate; inside super in pension phase they’re taxed at nothing after 60. Both effects push in opposite directions and depend heavily on your structure β€” treat the return input as your after-tax expectation.
  • Super is the missing wing. For most Australians the super guarantee is quietly building a second FIRE fund that unlocks at 60. If your number lands near that age, you likely need far less outside super than this page implies.
  • Returns are smooth here and lumpy in reality. A straight compounding line at 8.8% hides drawdowns of 30–50% that will happen along the way. The destination maths holds; the ride will not look like the chart.
  • Also not modelled: pay rises, career breaks, kids, the age pension, HECS, or the possibility that you like your job.

General information only β€” not financial advice, and I’m not a financial adviser. Your numbers stay in your browser.

Fair warning, before you trust anything above: this was built by one random guy on the internet who likes spreadsheets β€” not an accountant, not a financial adviser, not a lawyer. It almost certainly contains bugs, simplifications, and rules that have quietly gone out of date. You probably shouldn’t use it for anything that matters.

Nothing on this page is financial, tax or legal advice, or a recommendation to do anything. The numbers are provided as-is with no warranty of any kind, and I accept no liability for any loss that comes from relying on them. Before making a real decision, check the figures against the ATO’s published rates and talk to someone actually licensed to advise you. If you use these numbers anyway, you do so entirely at your own risk.