How much do I need to retire?

Why can’t I just use the “4% rule”?

The 4% rule says withdraw 4% of your savings in year one, adjust for inflation after that, and — historically — your money had a good chance of lasting 30 years.

That’s useful research. It is not an answer to your question.

It tells you the odds your money holds up. It doesn’t tell you the dollar amount you can safely spend starting the month you retire. Those are two different questions, and most of the retirement-planning industry answers the one you didn’t ask.

There’s a second problem hiding inside the math: a loss early in retirement does more damage than the same loss later. A 30% drop needs a 43% gain just to get back to even. If that 30% drop lands in year one or two of retirement — while you’re also withdrawing income — the recovery gets much harder, because you’re pulling money out of a smaller account on the way back up. A probability-based rule can’t tell you, in advance, whether you’re about to be that unlucky sequence.

So what’s my real number — the income gap?

Start simpler than any withdrawal rule. Two lists.

List one: what your life actually costs — housing, health care, food, the trips you actually want to take, everything.

List two: what’s already guaranteed for life, no matter what markets do — Social Security, any pension, any existing annuity income.

Subtract list two from list one. What’s left is your income gap — the part of your monthly number nothing is currently covering.

That gap is the real question. Not “what’s a safe withdrawal rate,” but “what has to reliably fund this exact number, for as long as I’m alive.” Everything else in a retirement plan — investment mix, Social Security timing, whether guaranteed income makes sense for part of the money — exists to answer that one question in dollars, not percentages.

Why does Social Security timing change the math this much?

Claim at 62 and you lock in roughly 70% of your full benefit. Wait until 70 and you lock in roughly 124% of it — about 77% more, every month, for the rest of your life. That’s the Social Security Administration’s own reduction and delayed-retirement-credit formula (source below), not a projection.

That’s not a projection or a market bet. It’s arithmetic built into the benefit formula itself, and it’s one of the few places in a retirement plan where waiting is close to a guaranteed raise. It doesn’t mean 70 is the right claiming age for everyone — health, other income, and your spouse’s benefit all matter — but it means the decision deserves real math, not a guess made the year you happen to stop working.

Why does retirement need a different plan than the one that got me here?

Building your savings and living off your savings are two different jobs, and the industry mostly built its playbook for the first one.

Mountaineers describe something similar. Most climbers who die on Mount Everest don’t die climbing up — a study of 94 fatalities between 1921 and 2006, published in the BMJ (source below), found 56% happened on the descent, versus about 10% on the way up. The climb up gets all the attention. The way down is where the real risk lives, because you’re tired, resources are lower, and one bad decision compounds fast.

Retirement is the descent. The accumulation years reward patience and time in the market — a loss can wait to recover. The income years don’t offer that patience, because you’re withdrawing while the market moves, not just watching it. A plan built only for climbing doesn’t automatically know how to get you down safely.

So what’s the actual answer?

There isn’t a universal number, and anyone who hands you one without seeing your real expenses, your real guaranteed income, and your real timeline is guessing on your behalf.

What you can get instead is a specific one: your income gap, your Social Security math, and a plan for funding the gap that doesn’t rely on hoping the next 30 years look like the last 30. That’s a math problem with your numbers in it — not a percentage borrowed from someone else’s.