FIRE Basic
1779
Simple Financial Independence calculator with savings rate and investment returns
NOTEModel Overview
🔥 FIRE BASIC MODEL
Calculates years to Financial Independence based on savings rate and investment returns.
The 4% rule: You need 25x your annual expenses to retire.
CONSTANTAnnual Income
80000
Your gross annual income
income
VARIABLESavings Rate
triangular
Percentage of income saved (20-60%)
savings_rate
VARIABLEInvestment Return
normal
Expected real return (after inflation)
return_rate
CONSTANTCurrent Savings
50000
Starting portfolio value
current_savings
FORMULAAnnual Savings
income * savings_rate
How much you save per year
income
savings_rate
annual_savings
FORMULAAnnual Expenses
income * (1 - savings_rate)
Your yearly spending
income
savings_rate
annual_expenses
FORMULAFIRE Number
annual_expenses * 25
25x expenses (4% rule)
annual_expenses
fire_number
FORMULAYears to FIRE
(fire_number - current_savings) / max(annual_savings + current_savings * return_rate, 1)
Simplified years until financial independence
fire_number
current_savings
annual_savings
return_rate
years_to_fire
OUTPUTYears to FI
Years to Financial Independence
OUTPUTTarget Portfolio
FIRE Number ($)
About the creator
The team behind Carlo. We believe everyone deserves tools to reason about risk and uncertainty.
What is Carlo?
Carlo is a visual tool for Monte Carlo simulation. Model uncertainty by dragging probability distributions, connecting them visually, and running thousands of scenarios instantly.