Amount of BTC you add each month via purchase or DCA
Use conservative assumptions. 10-15% is defensible.
Monthly expenses in today's dollars
Years to financial independence
17 years
Portfolio value at FI: $1,640,017
BTC at retirement
2.540 BTC
Portfolio value
$1,640,017
| Year | BTC held | BTC price | Portfolio value |
|---|---|---|---|
| Year 5 | 1.100 BTC | $120,681 | $132,750 |
| Year 10 | 1.700 BTC | $242,733 | $412,647 |
| Year 15 | 2.300 BTC | $488,224 | $1,122,915 |
| Year 20 | 2.900 BTC | $981,992 | $2,847,778 |
How crypto retirement planning works
Financial independence through Bitcoin accumulation follows the same fundamental math as any retirement plan: you need a portfolio large enough that sustainable withdrawals from it cover your living expenses indefinitely. The 4% rule provides the threshold — your portfolio value multiplied by 4% must equal or exceed your annual withdrawal need.
What makes a BTC-denominated plan different is that both your asset quantity and its price appreciation simultaneously determine the outcome. This calculator tracks BTC accumulation month by month, applies yearly price appreciation compounding, and checks each year whether the resulting portfolio value crosses the 4% withdrawal threshold for your stated expenses.
The 4% withdrawal rule applied to crypto
The original Trinity Study analyzed US stock and bond portfolios from 1926 to 1995 and found that a 4% annual withdrawal rate allowed portfolios to survive 30-year retirement periods across all historical scenarios. Applied to a $1,000,000 portfolio, this means $40,000 per year ($3,333/month) is the maximum sustainable withdrawal without depleting the principal.
For a crypto-heavy portfolio, there are legitimate reasons to use a more conservative withdrawal rate — perhaps 2–3% — given Bitcoin's higher volatility and the potential for multi-year bear markets that are more severe than anything in historical equity data. The calculator uses 4% as the baseline; applying your own safety margin by targeting a portfolio 50% larger than the strict 4% calculation implies is prudent.
Why accumulation behavior matters more than price
In the early years of a BTC accumulation plan, price movements — which are outside your control — determine portfolio value. But your monthly accumulation rate — which is entirely within your control — determines how many BTC you hold. Over a 10-year horizon, the number of BTC you accumulate is a more reliable variable than the price at any given time.
Scenario: two investors both start with 0 BTC in 2020. Investor A accumulates 0.01 BTC/month consistently. Investor B tries to time purchases and accumulates 0.005 BTC/month on average due to missed opportunities. After 10 years, Investor A holds 1.2 BTC versus Investor B's 0.6 BTC — a 2× difference in holdings that will persist regardless of what price does. Consistent accumulation is the only variable you fully control.
Stress testing your assumptions
Run the calculator three times: once at 5% annual appreciation (conservative/bearish), once at 15% (moderate), and once at 30% (optimistic). The range of outcomes across these scenarios gives you a realistic planning bracket. Build your financial plan around achieving adequacy in the conservative scenario. The moderate and optimistic outcomes are bonuses, not guarantees.
If the conservative scenario produces financial independence within an acceptable timeframe, your plan is robust. If it requires the optimistic scenario, you are betting on a specific price outcome — which is not a plan, it is speculation.