Choose Beacon if you want to track current investable assets and see a deterministic FI date. Choose FIRECalc if you want to test a retirement portfolio and spending plan across historical market sequences.
These tools answer different questions. Beacon is about the path to financial independence. FIRECalc is primarily about whether a retirement plan would have survived difficult historical conditions once you start drawing from the portfolio.
At a glance
| Area | Beacon | FIRECalc |
|---|---|---|
| Core question | When could my investable assets reach my FI target? | How would this retirement plan have held up across historical periods? |
| Inputs | Assets, savings, spending, expected return, and withdrawal rate. | Portfolio, spending, retirement length, allocation, and optional income or spending changes. |
| Method | Deterministic projection using your stated assumptions. | Historical sequence testing across past market conditions. |
| Ongoing tracking | Built for repeated manual updates as balances and plans change. | Built to run and investigate retirement scenarios. |
| Best for | Keeping the accumulation path and FI date visible. | Exploring sequence-of-returns risk and withdrawal-plan resilience. |
When Beacon is the better fit
Beacon is most useful before and during the accumulation phase, when the immediate question is how current investable assets, annual savings, target spending, return assumptions, and withdrawal rate fit together. You can update the numbers manually and see a projected date that follows directly from those inputs.
It is intentionally simple. The point is not to produce a single answer that is certain; it is to show the assumptions clearly enough that you can revisit them when savings, spending, or priorities change.
When FIRECalc is the better fit
FIRECalc tests a retirement portfolio and spending plan against historical market periods. Its official site explains that it evaluates every available historical starting point, with assumptions you can change for spending, other income, allocation, future contributions, fees, and portfolio changes. It is particularly helpful for visualizing sequence-of-returns risk: two portfolios with the same long-run average return can have very different experiences depending on when withdrawals begin.
Historical testing is not a forecast or a guarantee. It is a way to explore the conditions a plan has survived in the past and decide which risks deserve more margin.
Use a projected date and a stress test together
A useful workflow is to start with the core FI inputs and get a clear base case. Then, as retirement becomes nearer or assumptions become more consequential, test the withdrawal plan under difficult sequences. The tools do not have to compete: one can help you track the journey while the other helps you pressure-test the destination.
Which should you choose?
- Choose Beacon for ongoing manual FI tracking and a transparent deterministic projected date.
- Choose FIRECalc for historical portfolio stress testing, especially around retirement and withdrawal decisions.
- Use both concepts when you want a clear accumulation plan plus a view of sequence-of-returns risk.
Read our top FI tools guide for a wider set of planning options, and our guide to choosing a withdrawal rate for the assumption that connects spending to a portfolio target.
Keep your path to FI visible
Beacon maps current investable assets and your assumptions to a clear projected date.
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