Retirement detailed calculator

I know that there are many online FIRE calculators. But I couldn't find any which was transparent about its algo or was configurable enough. So I decided to write a small script for it and wanted to share it: https://pastebin.com/tZMXEESF Hope this helps all those who have been asking about the amount of corpus required to retire safely! An example according to which 2.8 cr is enough to last whole life: Inputs: - CURRENT_YEAR = 2021 - RETIREMENT_YEAR = 2025 - DEATH_YEAR = 2080 - INFLATION_RATE = 0.06  # 6% inflation rate in India on average - SALARY_INCREASE_INTERVAL = 3  # Will get a salary bump after these many years (job hop interval) - SALARY_INCREASE_RATE = 0.5  # 50% salary hike at job switch - EQUITY_RETURN_RATE = 0.1  # Assuming 10% return rate from index funds. - CURRENT_WEALTH = 5000000.0  # The corpus you have right now - CURRENT_ANNUAL_EXPENSES = 1000000.0  # Your current annual expenses - CURRENT_ANNUAL_INCOME = 3700000.0  # Your current annual salary after tax - EXPENSE_REDUCTION_RATIO_AFTER_RETIREMENT = 0.5  # Annual expenses will become half of before due to no rents/donations etc. Output: YEAR 2025: Corpus at the start of retirement = 274.01 lacs [Real value in 2021 = 217.04 lacs] YEAR 2025: Annual expenses just before retirement = 12.62 lacs [Real value in 2021 = 10.00 lacs] YEAR 2025: At the start of retirement, your corpus is 21.70 times your annual expenses. YEAR 2025: Annual expenses (x0.50) after retirement = 6.31 lacs [Real value in 2021 = 5.00 lacs] YEAR 2080: Corpus at deathbed = 24301.30 lacs [Real value in 2021 = 780.88 lacs] YEAR 2080: Annual expenses at deathbed = 155.60 lacs [Real value in 2021 = 5.00 lacs] YEAR 2080: At deathbed, your corpus is 156.18 times your annual expenses #personalfinance #investments #FIRE