Can I retire at 55?

A 30+ year retirement needs numbers the 4% rule was never built for. See how much you need saved, what 20 years of contributions get you, and your real survival odds at a lower withdrawal rate.

Target needed at 55
Projected balance at 55
Gap (target − projected)
Retirement survival horizon (yrs)
Why a lower withdrawal rate than 4%?For a 55-year-old the money must last 35-40+ years, and the Trinity 4% study was built on 30-year sequences. Most planners use 3.3-3.5% for early retirement — the long horizon changes the safe number.
How is the target calculated?Target = annual spending ÷ withdrawal rate. $50k ÷ 3.5% = about $1.43M. That's after-inflation spending power, so the projection runs in real returns: (1+nominal)/(1+inflation) − 1.
What if the projection is short?Look at the gap: every $500/month of extra contributions or 0.5% of return cuts the working years needed. The tool is a lever finder — move contributions, spending, and rate to close the gap in numbers you can actually control.
Is this advice?No — a planning estimate. Real early retirement also needs healthcare (pre-Medicare is expensive), sequence-of-return luck and a buffer. Use the 20% lower return scenario as your paranoid twin.