FI Age Is When Work Becomes Optional. Retirement Age Is When You Stop.

Why FI Age is the better target

Retirement age is binary — you're working or you're not. FI Age is structural — it's the moment at which work becomes a choice. Most people who hit FI keep working, but on dramatically different terms (less hours, less stress, more meaningful work, lower comp by choice). The gap between FI Age and stop-working age is where modern financial planning happens.

• FI Age ≈ portfolio reaches ~25× the expenses it must cover after Social Security — roughly 20× your total annual expenses
• Hitting FI doesn't mean quitting — it means freedom to choose
• Most FI Age decisions live 10–15 years before retirement

Why this number changes everything

Plans optimized for retirement age tend to over-grind in the last 5 years and under-optimize the previous 25. Plans optimized for FI Age tend to make better decisions earlier — housing sized for optionality, careers chosen for sustainability, lifestyle calibrated to the freedom math.

How PeakWorth calculates FI Age

PeakWorth runs your real numbers (income, expenses, assets, debts, goals) through a long-horizon model and surfaces the year your portfolio crosses your FI threshold. Every scenario you model shows the FI Age impact, so you can see how each decision moves the date — earlier or later.