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See what happens if you point more cash at freedom every month.
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See your FI number, your biggest lever, and whether the plan survives bad decades before you trust the timeline.
You are not here to browse calculators. You are here to see when work becomes optional, what moves that date most, and what could still break the plan.
This sample plan is loaded on purpose so you can instantly see the freedom date, FI number, biggest lever, and bad-decade warning before entering your own numbers.
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This sample plan is already loaded so you can see how FourPercent thinks before you enter your own numbers.
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This turns the timeline into something you can feel.
See what happens if you point more cash at freedom every month.
Lower the target from both ends by trimming lifestyle spend.
See what breaks if markets disappoint when you need them most.
The number alone is not the product. The useful part is knowing what to change next, and whether the plan is sturdy enough to trust.
Save the current plan, compare it against your last checkpoint, and make improvement visible instead of forgettable.
These insights translate the output into decisions: what is doing the work, what looks fragile, and where the next useful move probably is.
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FourPercent is built to show the difference between changes that feel productive and changes that actually move the freedom date.
Cutting spending lowers the target portfolio and shortens the runway at the same time. In many plans, this beats chasing slightly better returns.
Monthly investing is immediate, controllable, and compounding starts now. It often changes the date faster than small tweaks to your return assumption.
Higher returns can help, but relying on them is fragile. The real job is building a plan that still looks believable when markets do not cooperate.
This is built to show timing, tradeoffs, scenario comparisons, and what to do next instead of leaving the interpretation work to you.
You enter a few inputs, get a number, and leave with the burden of figuring out what matters, what is fragile, and what to change next.
People do not need more retirement math on the internet. They need a faster way to understand whether the plan is believable, what improves it most, and what could still break it.
A useful FIRE product should help you make a better decision, not leave you with more interpretation work after the number appears.
Start with the base freedom date, refine the assumptions, stress-test the weak points, backtest against history, and then compare alternatives if the plan still needs work.
Get the base freedom date, portfolio target, and strongest lever without digging through a dozen separate tools first.
Open the full planner →Run the weaker-market version, compare alternate futures, and see whether the timeline is robust or quietly fragile.
Try Monte Carlo FIRE →Once you understand the base case, use Coast FIRE, taxes, geography, and timing comparisons to decide which path is actually worth living.
The goal is not to sell optimism. The goal is to show whether your plan is early, fragile, flexible, or stronger than you thought.
The product makes the spending target, return assumption, and scenario tradeoffs legible instead of hiding them behind one magic number.
The downside case is part of the workflow. If a bad stretch meaningfully damages the timeline, FourPercent is supposed to make that uncomfortable fact obvious.
This is planning support, not financial advice. It is for people who want a clearer way to think through independence, tradeoffs, and resilience on their own terms.
The product is strongest when you move with intent: get the date, move it sooner, or find out whether the current plan survives bad markets.
Start with the planner that turns your current setup into a real timeline you can react to.
Use the tools that reveal whether saving more, spending less, or changing the structure of the plan buys back the most life.
Challenge the base case before you trust it with actual life decisions.