FIRE calculator
The portfolio that covers your spending forever — and the year your savings rate gets you there. Nothing is sent anywhere; the maths runs in this page.
Your FIRE number
€1.050.000
At €1.800 a month you reach it in 18y 11m — around July 2045. You are 11% of the way there.
Years to go
18y 11m
Still to save
€930.000
Monthly income at FIRE
€3.500
Your net worth is the input that keeps moving
This answer is only as current as the number you typed. Track your accounts and the gap to your FIRE target updates itself — no bank login required.
How the FIRE number is worked out
Your FIRE number is annual spending divided by your withdrawal rate. At 4% — the rate most of the movement anchors on — that is simply spending multiplied by 25. Spend €42,000 a year and the target is €1,050,000.
The 4% figure comes from the Trinity study, which tested US stock and bond portfolios across every 30-year window in the 20th century and asked what starting withdrawal rate survived them all. It is a rule of thumb from one country's history, not a law. A longer retirement, a more conservative portfolio, or a country whose markets did worse than America's all argue for a lower rate — which is why the slider goes down to 2%.
The years-to-target figure then compounds your current net worth and monthly savings at your realreturn — after inflation — until it reaches the target. Working in real terms is what lets today's spending figure stand in for tomorrow's without a separate inflation adjustment.
Why the withdrawal rate matters more than the return
Moving your withdrawal rate from 4% to 3% does not make the target 25% bigger. It makes it 33% bigger, because the relationship is a reciprocal: the target is spending divided by the rate, so small cuts to the rate move the goal a long way.
That asymmetry is worth sitting with before optimising anything else. Trimming annual spending has the same leverage in reverse — every €1,000 a year you do not need is €25,000 you do not have to accumulate at a 4% rate. For most people, spending is also the input they control most directly, which is why it is the first slider rather than the last.
What this calculator deliberately does not model
Sequence-of-returns risk. This projects a smooth average return. Real markets do not deliver one, and a bad first few years of retirement damages a portfolio far more than the same years later on. Treat the date as a central estimate, not a promise.
Tax and local wrappers. Withdrawals are taxed differently in every country — and in some, not at all up to a threshold. An ISA in the UK, a 401(k) in the US and Box 3 wealth tax in the Netherlands all change what a given portfolio actually supports.
State and workplace pensions. Income that starts at 67 means the years before it are the hard part, and a portfolio that only has to bridge to a pension can be much smaller than one funding a whole retirement.
None of these are reasons to skip the calculation. They are reasons to treat the output as the start of the question rather than the end of it.
Common questions
The size of portfolio that covers your annual spending indefinitely from investment returns, so working becomes optional. It is your annual spending divided by your planned withdrawal rate — at the common 4% rate, 25 times your yearly spending.
It is a rule of thumb from one country and one century, not a guarantee. The Trinity study tested 30-year US retirements; longer horizons, lower expected returns, or non-US markets all argue for something closer to 3 or 3.5%. Move the slider and watch how much the target changes — that sensitivity is the real lesson.
Real — after inflation. This calculator expresses everything in today’s money, so your current annual spending stays meaningful decades out. Long-run real returns for a global equity portfolio sit around 5%, which is why the default is 5.5% rather than the 8% often quoted in nominal terms.
No. Withdrawal taxation differs by country, by account wrapper and by income level, and a single number cannot be honest about all of them. Treat the result as a pre-tax target and adjust for your own situation.
Any of the 31 NetWorthTrackr supports, including EUR, GBP, INR, SGD and CHF. The calculator changes the symbol and digit grouping only — it never converts what you typed, so the figures stay yours.
No. Every figure is calculated in your browser and nothing is sent to us. There is no account, no email field and no cookie needed to use it.
Estimates only, not financial advice. Every figure is calculated in your browser from what you typed — nothing is sent to us and nothing is stored.All tools →