How long until you're financially independent?
You know your FIRE number. The next question is how long it takes to get there. The answer is set by three levers, and one of them matters far more than the size of your paycheque: your savings rate.
Once you know your FIRE number, everyone asks the same next question: how long? The honest answer is not “the number divided by what I save each year.” Compounding bends that line, and three levers set its slope: your savings rate, your real return, and how far you already are. One of them dwarfs the others, and it is not how much you earn.
Run it as you read: our free FIRE Number calculator gives you years to FI and a projected date from your own numbers. No sign-up. If you haven’t pinned the target itself yet, start with How to calculate your FIRE number.
Lever one: your savings rate (the one that matters)
This is the counterintuitive heart of FIRE. Your time to independence depends far more on the percentage of your income you save than on how much you earn. The reason is that a high savings rate does two things at once: it grows the pile faster and it shrinks the life the pile has to fund. Double your income and blow the raise, and your timeline barely moves; hold your spending and bank the raise, and it collapses.
20% savings rate ≈ 37 years · 40% ≈ 22 years · 50% ≈ 17 years · 65% ≈ 10.5 years.
Lever two: your real return, not your nominal one
The growth rate in the math is your real return, nominal minus inflation. This is where cross-border savers get fooled. A 12% nominal return in a 6% inflation economy is the same ~6% real engine as a 5% nominal return in a 1% inflation economy, even though the first number looks twice as good. We pull that apart in The 4% rule, for people who don’t retire in America.
Lever three: how far you already are (and Coast FI)
The closer your pile is to your number, the more the timeline is driven by compounding than by fresh saving. There is a milestone before the finish line worth knowing: Coast FI, the point where what you have already invested will grow into your full number by your target age with no further contributions. Past Coast FI, the clock keeps running without you. Find yours with the Coast FI calculator or read the full set of milestones in Types of FIRE.
The cross-border twist: FX makes the timeline lie
If your money lives in more than one currency, your net worth jumps around every month for reasons that have nothing to do with saving. A strong-krone month flatters your progress; a weak one erases a quarter of it on paper. Recompute “years to FI” on a bad FX month and the finish line lurches away, even though you saved exactly as planned. The fix is to separate the money you actually saved from the currency noise, which we cover in Your savings rate is half FX.
Putting it together
Your timeline is not a fixed number, it is a slope you can steepen. Lift your savings rate first, because it is the strongest lever and the one you control. Use your real return rather than the flattering nominal one. Track your distance to Coast FI as the near milestone. And stop trusting any single month, because across currencies a month is mostly weather.
How fjordFIRE handles this
fjordFIRE recomputes your years to FI and projected date every month from your real check-in numbers, using your real return and your currency, not a one-shot guess. Because it decomposes each month into real saving, market movement, and FX, the timeline reflects what you actually put away rather than what the exchange rate did. And it runs a Monte Carlo fan around that date, so you see a probable range instead of one confident line.
We don’t pretend the date is certain. Markets and currencies make any single projection a best guess; what we can do honestly is keep it current, keep it in your currency, and show you the spread rather than a false point.
Go deeper: Lesson: The FI Spectrum · Lesson: The 4% Rule.
Companion tools: FIRE Number calculator · Coast FI calculator · Savings Rate calculator.