Bitcoin FIRE Calculator

Want to know if your Bitcoin stack can actually carry you to early retirement? Enter your holdings, your monthly buys, and your target spending, and this calculator models the whole journey year by year, then tells you plainly whether the money lasts.

[Run your numbers in the calculator](/)

Most retirement calculators were built for index funds and bonds. They assume steady, boring growth, which is exactly what Bitcoin is not. Feeding a volatile, cyclical asset into a tool designed for a 7% stock market average gives you a number that looks precise and means very little.

A Bitcoin FIRE calculator is different in one important way: it models Bitcoin as Bitcoin. It accounts for the kind of long-run growth curve Bitcoin has actually followed, it lets you set your own assumptions rather than pretending there is one true answer, and it runs both halves of the journey (building the stack, then drawing it down in retirement) so you see not just how big your pile gets, but whether it survives you spending from it.

This page explains what the tool does, walks through a real example, and shows you how to turn your own inputs into a plan you can keep.

What the calculator actually models

FIRE stands for Financial Independence, Retire Early. The whole idea rests on one question: can your assets generate enough to live on for the rest of your life without you working? If the term is new to you, start with what FIRE actually means. For a Bitcoin-based plan, answering that means modeling two distinct phases.

The first phase is accumulation. You start with whatever Bitcoin you hold today, you keep buying a set amount each month, and the stack grows both from your contributions and from Bitcoin's price appreciation over time. The second phase is drawdown. You stop buying, you start selling small amounts to cover your living costs, those costs rise every year with inflation, and the remaining stack keeps growing (or not) underneath you. The calculator runs both phases and reports the outcome that matters: does your Bitcoin outlast your lifespan, or does it run dry early?

That drawdown half is where most free tools go quiet. Plenty of calculators will happily project a big future number for your stack. Far fewer will honestly model you selling from it for thirty years while inflation eats your expenses. That second question is the one that decides whether you can actually retire, and it is the one this tool is built to answer.

A worked example

Say you are 35, you hold 0.5 BTC today, and you can add 300 dollars a month. You want to stop working at 55 and live on the equivalent of 40,000 dollars a year, and you expect to need that income for 30 years of retirement.

Here is the shape of what you enter and what comes back:

The calculator projects your stack forward to 55 using the growth model you chose, then simulates you selling from it each year through retirement, raising your withdrawals with inflation as it goes. The output is not a single number. It is a year-by-year path that shows the stack building, peaking around your retirement date, then drawing down, and a clear verdict at the end: on track, or short by a given margin.

The value is in what that verdict lets you do. If the plan comes up short, you can immediately see which lever fixes it: buy a little more each month, retire two years later, trim retirement spending, or accept a more aggressive growth assumption (and understand the risk that carries). You change one input, you rerun, you watch the verdict move. That is planning, not guessing. If the monthly buy is your main lever, dollar cost averaging is worth reading next.

The numbers above are illustrative, chosen to show how the inputs connect. Your own figures are the ones that matter, which is the entire point of running it yourself.

Why a report beats a number on a screen

An on-screen result answers your question once, then vanishes when you close the tab. A plan you are going to revisit, adjust, and maybe show a partner needs to be something you can keep.

The calculator can generate a full PDF report of your scenario: the year-by-year projection, the assumptions you used, the drawdown path, and the final verdict, laid out in a document you can save, print, revisit next year, or sanity-check against your own thinking. It is the difference between a quick look and an actual retirement plan on paper.

[Generate your PDF report](/report)

How the projection is modeled

The tool does not assume Bitcoin repeats its early explosive years forever. It uses growth curves with diminishing returns, so the aggressive gains sit in the early years and flatten over decades, which keeps the plan realistic rather than fantastical. You can set conservative, balanced, or bullish assumptions, because nobody actually knows the future price and a good plan tests more than one belief about it. For a fuller explanation of how Bitcoin's long-run price is modeled, see the power law methodology explainer.

Frequently asked questions

Is there a free Bitcoin FIRE calculator? Yes, you can run scenarios in the calculator for free and see your on-screen verdict. The paid PDF report is optional, for when you want a keepable, printable version of your full plan.

How is a Bitcoin FIRE calculator different from a normal retirement calculator? A standard retirement calculator assumes steady stock-and-bond growth. A Bitcoin FIRE calculator models Bitcoin's actual long-run growth pattern, lets you set your own assumptions, and simulates selling from a volatile asset in retirement rather than a smooth one.

How much Bitcoin do I need to retire early? It depends entirely on your target spending, your timeline, and your growth assumptions, which is why a calculator beats any single headline figure. For the fuller picture, see how much Bitcoin you need to retire.

Can I retire on Bitcoin alone? Some people plan to, others use Bitcoin as one part of a broader retirement mix. The calculator lets you model a Bitcoin-only plan and see honestly whether it holds up under your own numbers.

What growth rate should I assume? There is no correct answer, which is the point of testing several. Running a conservative, a balanced, and a bullish scenario shows you the range of outcomes rather than a false single prediction.

Start planning

Enter your holdings, set your assumptions, and see whether your stack carries you to early retirement. When you want it as a document you can keep, generate the full PDF report.

[Open the calculator](/)

This calculator and the information on this page are for educational and informational purposes only. They do not constitute financial, investment, or retirement advice. Bitcoin is volatile and past performance does not predict future results. Consult a qualified financial professional before making decisions.

Related: how long will my Bitcoin last in retirement?