FIRE planning
How Much Money Do I Need to Retire Early?
A practical guide to estimating your FIRE number, savings rate, investment assumptions, and early retirement timeline.
7 min read
Start with annual spending, not your salary
The cleanest way to estimate early retirement is to begin with annual expenses. Income matters because it funds savings, but expenses determine how large your portfolio must become.
A common first estimate is annual expenses divided by a withdrawal rate. For example, $40,000 of annual spending divided by 4% creates a $1,000,000 target portfolio.
Your savings rate controls the timeline
Two people with the same salary can have very different FIRE timelines. The person who saves 50% of income is buying back time much faster than the person saving 10%.
This is why WorkAINow connects the FIRE calculator with compound interest. The FIRE target is the destination; monthly investing is the engine.
Use scenarios instead of one perfect number
No early retirement estimate is exact. Market returns, housing costs, healthcare, taxes, inflation, and lifestyle changes all matter.
A useful planning habit is to test conservative, base, and optimistic cases. If the plan works in a cautious case, it is more resilient.