ProjectionLab is the most respected pure planning tool in the FIRE community, and deservedly so — for a lot of people it is the right answer and this page will say so. Here is an honest Fire Horizon vs ProjectionLab comparison. The split: it is the deeper model, Fire Horizon is the live tracker. The decision usually comes down to one question — do you want to link your accounts, or not?
Pricing verified July 2026
| Feature | Fire Horizon | ProjectionLab | Edge |
|---|---|---|---|
| Starting price | Free tier, paid from $6.99/mo | Free tier; Premium $129/yr; Pro $549/yr | Fire Horizon |
| Free tier | Monte Carlo, dividends, what-ifs and net worth all free | Forecasting, Monte Carlo and historical backtesting | Comparable |
| Account linking | Plaid, SnapTrade or CSV import, priced daily | None by design — entered and maintained by hand | Fire Horizon |
| Privacy posture | Linking is optional, but syncing means holding your data | Nothing to link, so nothing to leak — a deliberate choice | ProjectionLab |
| Historical backtesting | Monte Carlo only | Historical backtesting alongside Monte Carlo | ProjectionLab |
| Modelling depth | Focused on the FIRE question and the portfolio behind it | Very deep — life events, estate, ACA subsidies, tax optimization | ProjectionLab |
| FIRE variants | Coast, Barista, Lean and Fat as first-class plan types | Expressible through flexible modelling, not preset types | Fire Horizon |
| Live portfolio tracking | Holdings, dividends and splits tracked and priced daily | A planner rather than a tracker | Fire Horizon |
| Withdrawal strategies | Fixed dollar, percent-of-balance, or guardrails with a floor | Withdrawal strategies included on the paid tier | Comparable |
ProjectionLab does not connect to your brokerage, and that is not an oversight — it is the product's position, and a reason people recommend it. The cost of that position is maintenance: a hand-built model is accurate on the day you build it and drifts quietly afterwards. Fire Horizon takes the other side of the trade, syncing through Plaid or SnapTrade so the answer stays current, which means we do hold your holdings data. Neither choice is wrong; they suit different people.
Historical backtesting is a real gap on our side. Replaying a plan through actual market sequences — including the ones that broke retirements — catches things a Monte Carlo drawn from a distribution can smooth over. Their life-event and tax modelling also goes further than ours does today.
A plan you check twice a year is a plan that was right twice a year. Because Fire Horizon prices your real holdings daily, the retirement date moves when your portfolio does, and the readiness check re-runs on the balances you actually hold rather than the ones you last typed in.
See what a tracked plan looks like.
Free to start, no card required — and linking a brokerage stays optional. Import a CSV instead, or just type the numbers in.
Create your free accountNot financial advice — projections are estimates based on your assumptions
Disclosure: we build Fire Horizon, so we are not a neutral party — read this the way you would any comparison written by one of the entrants. Every competitor figure is quoted from their own public pricing and feature pages, and we have tried to be specific about what they do better.