Retirement
calculator.
Enter your age, savings, and target retirement age to see a projected savings trajectory. Change the inputs to compare scenarios.
Privacy: runs in your browser. What you enter stays on your device.
This page covers personal finance fundamentals that apply regardless of your view on Bitcoin or fiat currencyfiat currencyMoney declared legal tender by a government, not backed by a physical commodity. Its value rests on trust in the issuing government.Full definition.
Two calculators. The top one projects a traditional monthly-savings-plus-index-fund trajectory, with an optional Bitcoin blend slider. The bottom one projects a pure Bitcoin DCADollar-cost averaging (DCA)Investing a fixed amount on a regular schedule, such as $50 every payday, regardless of price. It spreads out when money enters the market and buys more units when prices are low, but it does not guarantee a better price than investing all at once, a profit or protection against loss.Full definition strategy at a CAGRCompound Annual Growth Rate (CAGR)The steady yearly growth rate that would take an investment from its starting value to its ending value, with gains compounding. Example: $1,000 growing to $2,000 over 10 years is a CAGR of about 7.2%. It hides the ups and downs along the way, which matters for a volatile asset like Bitcoin. of your choosing. Both are illustrative math toys, not forecasts. Plug in your real numbers, experiment with the sliders, and compare what a small change today means 40 years out.
Retirement Calculator
See how your savings grow over time. Adjust the inputs and watch the chart update.
The Bitcoin version
Same idea as above, but DCA'ing into Bitcoin instead of an index fund. The numbers can look absurd - that's because Bitcoin's historical CAGR is absurd. Dial in your own assumption below.
SCHD income assumes you convert your BTC stack at retirement into Schwab's Dividend Equity ETFExchange-Traded Fund (ETF)A basket of investments (stocks, bonds, or Bitcoin) that trades on a stock exchange like a single share. at its ~3.5% dividend yield. Historical Bitcoin CAGR has been over 100% since 2010, but forward returns will almost certainly be lower as the market matures. The "Moderate" 20% default reflects that reality. This is a math toy, not financial advice.
How to use it
Start with the top calculator. Enter your actual age, your actual monthly savings capacity, and a target retirement age. Leave the return at 10 percent for a nominal long-run S&P estimate; drop it to 7 percent if you want a more conservative real-return assumption.
Then move the Bitcoin allocation slider from 0 to 10 to 20 to watch the final number shift. The bottom calculator is for people running a Bitcoin-heavy strategy; choose a CAGR assumption you believe and see the stack size and the SCHD conversion income at retirement.
The real value is running two scenarios: what happens if I save nothing extra, versus what happens if I add $200 a month starting this year. The gap at age 65 is usually larger than people expect. That gap is the motivator.
What the calculator assumes
Both calculators use a constant annual return applied monthly. Actual markets are volatile; the real path looks jagged, not smooth. Over 40 years the geometric mean converges, but any specific decade can dramatically under- or outperform the long-run number.
Neither calculator models taxes, inflationinflationA general increase in prices over time, meaning each dollar buys less than it did before.Full definition, or sequence-of-returns risk (the risk that a bear marketBear marketA long slide in prices, usually defined as a drop of 20% or more from a recent high in a broad market index such as the S&P 500. Bitcoin's four completed cycle bear markets bottomed 77% to 93% below their peaks, and so far it has gone on to new highs after each one. in your first retirement years damages the plan even if the long-run average still works). For those risks, see The 4% Rule, which is the conventional bridge from "what balance do I have" to "how much can I actually spend."
Where to go from here
Sources
Figures, rates and rules change: check each source’s date before acting on it.
- Investor.gov compound interestcompound interestEarning interest on your interest. Your returns reinvested to earn even more returns over time.Full definition calculator (reference methodology) - investor.gov
- Bitcoin historical price data - blockchain.com
- SCHD dividend yield reference (Schwab) - schwabassetmanagement.com
- Bengen "4% Rule" original paper (1994) - referenced in The 4% Rule
Last updated . Calculators are educational estimates, not financial advice. Not financial advice. Do your own research. Disclosures · How pages are reviewed