Sequence of returns: why your first five FI years matter most

Same average, different outcome

Two indie devs hit FIRE at 45 with $1.5M. Both withdraw $60k/yr (4%). Both earn 7% annual returns on average over 30 years.

Dev A retires into a strong market: +20%, +15%, +10% in years 1-3. Then a -30% crash in year 7. Then recovery.

Dev B retires into a crash: -30% in year 1. Then recovery: +15%, +20%, +10% in years 4-6. Then steady gains.

Same average return. Same withdrawal. Different ending.

Dev A finishes with $2.1M. Dev B runs out of money at 73.

This is sequence-of-returns risk. It's the single biggest threat to early-FI plans, and most FIRE math glosses over it.

Why the math is asymmetric

Withdrawing during a drawdown locks in losses. Selling $60k of a portfolio that just dropped 30% means selling more shares than you would have in a flat market — and those shares are gone for the recovery.

A loss early in retirement compounds against you. A loss late in retirement compounds against a smaller portfolio you've already largely depleted (or doubled, in good cases). Early matters more.

The first 5–10 years of FI are the danger zone. Get through them without a major drawdown and the portfolio's growth rate generally outpaces withdrawals from there on.

The mitigations

Three real moves.

Cash buffer. Hold 12–24 months of expenses in cash or short-term Treasuries before declaring FI. In a crash year, withdraw from the buffer instead of the portfolio. Refill it during good years.

Flexible withdrawals. The 4% rule assumes inflation-adjusted withdrawals regardless of market state. In practice, cutting spending by 10–20% during a crash year extends portfolio life dramatically. If your $60k can become $50k in a bad year, your sequence risk drops sharply.

Continued income. Even modest post-FI income reshapes the math. $20k/yr from app revenue, freelance, or part-time work means you only need to withdraw $40k/yr instead of $60k from the portfolio. That's a 33% reduction in withdrawal rate during the danger window.

The indie-dev natural hedge

Most early retirees with W-2 backgrounds have to fully stop earning to call it FIRE. Indie devs usually don't.

App MRR keeps flowing. A consulting gig once a quarter pays a few months of expenses. A book, a course, a small product — the income tail is rarely zero.

This is a structural advantage. You don't have to engineer flexibility — your income stream is already flexible. Lean into it. The first five years of FI is when even token income produces outsized portfolio protection.

The practical rule

Don't declare FI on the bare 25× number. Build to 28-30× of expenses, OR 25× plus a 24-month cash buffer, OR 25× plus an honest plan for $15-25k/yr of post-FI income.

Pick one. The unprotected version of FI runs into sequence-of-returns risk hard enough that some FIRE retirees go back to work in their 60s.

The point of the exit is to walk through it once.