| What it does | Paycheck, tax and money calculators with formulas and sources
| Free FIRE financial planner with Monte Carlo simulation and historical backtesting
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| Stage | Not given
| Established
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| Founded | Not given
| 2019
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| Based in | US
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| Pricing model | Free
| Free
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| Pricing | Not given
| Not given
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| Key features | - Paycheck calculators for all 50 states and DC
- Federal income tax and W-4 withholding calculators
- Savings, retirement, credit and loan calculators
- Roth IRA calculator
- CD calculator
- Savings calculator with compound interest
- Mortgage payoff calculator
- Loan payment calculator
- Credit card payoff calculator
- Dividend calculator
| - Monte Carlo simulation with up to 5,000 runs
- Historical backtesting against every market period since 1872
- US federal, state and payroll tax calculations for all 50 states
- Roth conversion ladder and RMD planning
- Six stress tests including market crash and job loss
- Three withdrawal strategies with 59.5 rule enforcement
- Support for 9 asset types with individual growth rates
- Month-by-month income and expense modeling with custom timelines
- Life event planning
- 9-currency support with auto-detection
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| What makes it different | - Shows all formulas and cites official sources
- Calculations run entirely in browser without collecting personal data
- Updated annually with current tax year data
- Explains assumptions and provides reproducible examples
- Free with no ads or product sales
| - Runs entirely in your browser with no account needed or data stored on servers
- Tests retirement against 154 years of historical market data since 1872
- Calculates exact tax liability for all 50 US states plus federal and payroll taxes
- Completely private with no data collection, selling or sharing
- Works offline on Android with full planner functionality
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 10 ▼ −1 (down) since last check | 12 ● no change since last check |
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| Trust Flow (Majestic) | 7 | 4 |
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| Citation Flow (Majestic) | 23 | 34 |
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| Referring domains (Majestic) | 14 | 127 |
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TakeHomeDesk
firenum™