FIRE Calculator

FIRE is a savings and investment approach aimed at building a large enough investment corpus that the returns alone can fund your living expenses indefinitely — letting you stop working for money well before a conventional retirement age. The core idea is that once your invested corpus reaches a multiple of your annual expenses (commonly 25x, based on a 4% withdrawal rate), you're considered financially independent, whether or not you actually stop working.

The 4% rule is a widely-cited guideline suggesting you can withdraw 4% of your investment corpus in the first year of retirement, then adjust that amount for inflation every year after, without running out of money over a long retirement — based on historical market return studies (most famously the Trinity study). It's a planning heuristic, not a guarantee: real market returns vary, and a lower withdrawal rate (e.g. 3-3.5%) is often considered safer for a very long, early retirement. This calculator lets you adjust the safe withdrawal rate yourself rather than assuming 4% is universally correct.

PayClever's Retirement Calculator assumes a fixed, conventional retirement age and a bounded retirement duration based on your life expectancy — it answers "how much do I need to retire at 60, for the next 25 years?" This FIRE Calculator instead uses an open-ended, perpetual-withdrawal framework and solves for the earliest age at which your growing corpus could sustain your expenses indefinitely — answering "when can I become financially independent?" rather than assuming any particular retirement age upfront.

Three levers move your FIRE date: investing more each month, reducing your ongoing expenses (which lowers your target FIRE number directly, since it's expenses ÷ withdrawal rate), or achieving a higher investment return (the riskiest lever to rely on, since it isn't within your control). Reducing expenses has an outsized effect compared to the other two, because it simultaneously shrinks the corpus you need and frees up more money to invest toward it.

These are planning estimates based on assumptions you choose — expected return, inflation, and safe withdrawal rate — not guaranteed outcomes or financial advice. Actual market returns vary year to year, and a withdrawal strategy that worked historically isn't a promise for the future. Use this calculator to understand your trajectory and test different scenarios, not as a certainty about the exact age you'll reach financial independence.