Living with Your FIRE Number: Refining and Revisiting Your Target Over Time

A FIRE number calculated today will not be the same number you reach for in year ten of your journey. Expenses change. Markets move. Life circumstances evolve. The couples who retire on target are not those who nailed the calculation on day one — they are those who revisited it regularly, refined the inputs, and adjusted their plan without losing momentum. By the end of this course you will be able to establish a disciplined practice of recalculating and validating your FIRE number at regular intervals, identify the triggers that should prompt an unscheduled recalculation, and maintain confidence in your target even when market volatility or life changes introduce uncertainty. What you will learn: - How to set up an annual FIRE number review process with a structured checklist of inputs to update - Recognizing the events that require an immediate recalculation: a major income change, a health event, a new dependent, a significant change in planned retirement expenses - How to handle a rising FIRE number — when expenses or risk tolerance shift upward — without experiencing planning paralysis - The difference between sequence-of-returns risk in the accumulation phase versus the drawdown phase, and how each affects your target - Adjusting for tax law changes that affect the real value of tax-advantaged accounts in your calculation - How to incorporate updated life expectancy assumptions and healthcare cost projections into a long-horizon retirement model - Portfolio growth versus target divergence: how to interpret the gap between where you are and where you projected you would be at this stage - Using your FIRE number as a communication tool with a partner or financial adviser — presenting the assumptions transparently This course uses a longitudinal case study format, following a household through multiple years and multiple recalculations of its FIRE number, to show how assumptions evolve and how the revised targets affect behavior. Self-assessment exercises prompt you to review your own current calculation for stale assumptions or unconsidered variables. Reflection prompts help you build a personal update schedule. This course is designed for individuals already working toward a FIRE target who want to manage their calculation rigorously over the long term. Suitable for those new to systematic financial review practices as well as those who set a number early and have not revisited it recently. No prior coursework is required.