A real comparison of the leading financial independence calculators — what each does best, where each falls short, and how to choose the right one for your path.
Pricing verified July 2026
At-a-glance comparison matrix
Tool
Best For
Account Sync
Free Tier
FIRE Variants
Fire Horizon
Tracking a FIRE plan against real accounts automatically
SnapTrade & Plaid (Daily)
Yes — full analytics & account linking on free tier
Native Built-In
ProjectionLab
Deep manual scenario modeling without linking accounts
None (Manual)
Yes — forecasting and Monte Carlo included
Manual Edit
Boldin (formerly NewRetirement)
Traditional retirement tax planning & Roth conversion ladders
Plaid ($120/yr tier)
Yes — basic cash flow planner
Manual Edit
Empower (formerly Personal Capital)
Free high-level net worth dashboard
Plaid / Yodlee (Free)
Yes — full dashboard is free
Manual Edit
FI Calc
Comparing withdrawal strategies against 100+ years of history
None (Manual)
Yes — entirely free
Manual Edit
cFIREsim
Open-source historical simulation with fine control
Best for: Tracking a FIRE plan against real accounts automatically
Free, paid from $6.99/mo
A FIRE-native portfolio tracker and planner. The FIRE variants — Coast, Barista, Lean, Fat — are first-class plan types with dedicated target lines, and the plan re-checks itself daily against your actual brokerage holdings.
Strengths
✓Coast, Barista, Lean and Fat FIRE are built-in plan types, each with their own target line and markers
✓Links to brokerages (SnapTrade and Plaid) or imports broker CSVs, then prices holdings daily
✓Monte Carlo, dividend income, what-if scenarios and net worth are free on every tier
✓Choose how you draw down: fixed dollar, percent-of-balance, or guardrails with a floor
✓The math is public at /methodology, and the projection engine is open to read
Trade-offs
•No tax bracket engine — no Roth conversion planner, no state/federal tax projections
•No Social Security claiming optimizer
•The newest product here, with the smallest track record
Best for: Deep manual scenario modeling without linking accounts
Free tier; Premium $129/yr; Pro $549/yr
The most respected pure planning tool in the FIRE community, and deliberately manual: it does not ask to link your accounts, which is precisely why a lot of privacy-minded planners choose it.
Strengths
✓Extremely flexible life-event and cash-flow milestone modeling
✓Historical backtesting alongside Monte Carlo simulations
✓No account linking by design — nothing of yours leaves your control
✓Genuinely capable free tier
Trade-offs
•You keep it current by hand — it is a planner, not an automated tracker
•Tax and withdrawal-strategy depth sits behind the $129/yr Premium tier
Best for: Traditional retirement tax planning & Roth conversion ladders
Free basic planner; PlannerPlus $120/yr
A deeply detailed financial planner built for traditional retirement. Its strength is in the tax engine — state taxes, federal brackets, Roth conversions, and Social Security claiming strategies.
Strengths
✓Roth conversion optimizer and tax bracket modeling
✓Social Security claiming age strategies
✓Granular income stream modeling
Trade-offs
•Interface feels complex and traditional-retirement focused
•Not structured for FIRE variants (Coast, Barista, Lean FIRE)
•Account linking and Monte Carlo require the $120/yr PlannerPlus tier
Best for: Comparing withdrawal strategies against 100+ years of history
Free
A focused, elegant historical simulator. Instead of one 4%-rule answer, it lets you test a retirement strategy against 100+ years of real market history under a range of withdrawal rules.
When choosing a calculator for early retirement, five criteria determine whether the output is useful or misleading:
Does it model uncertainty honestly?
A single average return is the most common way a calculator flatters you. Monte Carlo or historical backtesting — ideally with a stated success rate — is the minimum bar for a number you would act on.
Does it stay true without manual work?
A plan is only right on the day you typed it in. Tools that connect to real accounts keep answering the question months later; pure planners need you to come back and update them.
Does it model the drawdown, not just the climb?
Reaching a number is half the question. Whether the money lasts depends on how you withdraw — a fixed inflation-adjusted amount behaves very differently from a percentage of the balance.
Can you check the math?
Any tool making a claim about your retirement date should be willing to show its assumptions and its method. Published methodology beats a confident-looking chart.
What does it actually cost?
Free is not always free. A tool funded by an advisory business is priced in a different currency — your contact details and a sales conversation.
Frequently asked questions
What is the best FIRE calculator in 2026?
There is no single best calculator for everyone because tools solve different needs. For daily automated account tracking and native FIRE variants (Coast, Barista, Lean, Fat), Fire Horizon is built for it. For deep manual scenario planning without linking accounts, ProjectionLab is best. For tax and Roth conversion planning, Boldin. For free historical backtesting, FI Calc or cFIREsim.
Are there genuinely free FIRE calculators?
Yes. FI Calc and cFIREsim are free with no upsell at all. Fire Horizon, ProjectionLab and Boldin each have free tiers. Empower is free because it serves as a lead generation funnel for a paid wealth management service.
Do I need a paid retirement planner?
Not to get a credible answer. A free tool with Monte Carlo will tell you roughly when you can retire. Paid tiers unlock automation, daily brokerage syncing, advanced tax modeling, or multiple scenario comparisons.
What makes a FIRE calculator different from a retirement calculator?
FIRE planning assumes a much longer retirement, usually funded entirely by a portfolio rather than by Social Security and a pension. It comes with its own variants — Coast, Barista, Lean and Fat FIRE. Most mainstream retirement calculators assume retirement in your sixties over a 25 to 30 year horizon, which is overly optimistic for someone retiring at 45.
How accurate are these calculators?
None predict the future. Useful tools provide a probability distribution rather than a single fixed date (via Monte Carlo simulations or historical backtests). Treat outputs as conditional projections based on supplied assumptions — not financial advice.
Track your FIRE horizon with live account syncing.
Free to start, no card required — link accounts via SnapTrade or Plaid.
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.
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