Calculate your financial independence number and years until you can retire early. Enter your annual expenses and get retire-by age and fi number instantly — no spreadsheet required.
Step 1. Enter your annual expenses in the first field.
Step 2. Fill in current portfolio, expected return to complete the required inputs.
Step 3. The calculator instantly shows Retire-By Age, Fi Number, Years Remaining based on the formula: FI Number = Annual Expenses / SWR; Years to FI = log[(FI×r+PMT)/(Balance×r+PMT)] / log(1+r); PMT=annual savings, r=expected return, SWR=withdrawal rate.
With the default inputs loaded in the form, the calculator produces a starting result you can use as a baseline. Change one field at a time to compare a new scenario.
The Early Retirement Calculator works by applying the formula: FI Number = Annual Expenses / SWR; Years to FI = log[(FI×r+PMT)/(Balance×r+PMT)] / log(1+r); PMT=annual savings, r=expected return, SWR=withdrawal rate. Each input plays a distinct role — small changes to annual expenses can shift retire-by age significantly, which is why running multiple scenarios before making a decision is valuable.
To use this calculator effectively, gather accurate values for Annual Expenses, Current Portfolio, Expected Return, Savings Rate. Estimates are fine for exploration, but the more precise your inputs, the more actionable the output. The calculator instantly returns Retire-By Age, Fi Number, Years Remaining, giving you a clear picture of where you stand.
This type of retirement calculation is commonly used in real planning scenarios — not just academic exercises. Whether you are comparing options, setting a target, or checking your current position, the Early Retirement Calculator gives you a reliable number to work from. Always revisit the calculation if any input changes significantly.
It calculates retire-by age, fi number, years remaining using the formula FI Number = Annual Expenses / SWR; Years to FI = log[(FI×r+PMT)/(Balance×r+PMT)] / log(1+r); PMT=annual savings, r=expected return, SWR=withdrawal rate. The inputs required are annual expenses, current portfolio, expected return, savings rate.
You need: Annual Expenses; Current Portfolio; Expected Return; Savings Rate. Use accurate figures from your actual situation for the most useful result.
Results are mathematically precise given the inputs you provide. The formula used is: FI Number = Annual Expenses / SWR; Years to FI = log[(FI×r+PMT)/(Balance×r+PMT)] / log(1+r); PMT=annual savings, r=expected return, SWR=withdrawal rate. Accuracy depends on how precise your input values are — estimates work for planning, but use exact figures for final decisions.
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Disclaimer: Results from this calculator are for informational and planning purposes only and do not constitute financial, legal, or professional advice. Always verify important calculations with a qualified professional.
