Been getting a lot of questions lately about whether you can actually retire at 62 with $400,000 in 401k. Short answer: maybe, but it's way more nuanced than most people think. Let me break down what actually matters here.

First, the math on withdrawals. A lot of people still cite that old 4 percent rule, but honestly that's outdated. Most serious advisors have moved to something more conservative—around 3 to 3.7 percent—especially given where returns and interest rates are now. So if you're working with $400,000, you're looking at roughly $12,000 to $14,800 in pre-tax withdrawals your first year. That's the starting point. It's not nothing, but it's also not going to cover most people's full retirement expenses on its own.

Here's where people mess up though: they look at that number in isolation. The real question isn't just about the 401k withdrawal. It's how that stacks with Social Security, what your health insurance costs look like before Medicare kicks in at 65, and your tax situation. Those three things change everything.

Let's talk Social Security timing because this is huge. Claiming at 62 versus waiting to full retirement age or later is probably the biggest lever you control. Claiming early means lower monthly benefits for life—that's permanent. But it also means cash flow now. If you're trying to retire at 62 with $400,000 in 401k, you're probably tempted to claim early too. That's where a lot of people get trapped. Running scenarios where you delay benefits while taking modest withdrawals often looks way better long-term than claiming both early.

The health insurance gap from 62 to 65 is something I see people completely overlook. Medicare doesn't start until 65, so you're stuck with private coverage, COBRA, or a spouse's plan for three years. That's expensive and it's real. If you don't budget explicitly for those premiums and potential out-of-pocket costs, your plan falls apart fast. This is a blind spot for a lot of retirees with modest savings.

Once Medicare starts at 65, costs shift but don't disappear. You've still got premiums, deductibles, supplemental insurance—it's just a different structure. The point is you need to model this stuff explicitly, not hope it works out.

Tax treatment matters too. Traditional 401k withdrawals are ordinary income, so your bracket in retirement affects your actual take-home. There are strategies here—Roth conversions in low-income years, withdrawal sequencing—but they require planning. Most people don't think about this until it's too late.

So can you retire at 62 with $400,000 in 401k? For some people, yes. But usually only if: you have low spending needs, you have other income sources, or you have a real bridging strategy. That might mean part-time work for a few years, delaying Social Security, or even partial annuitization to lock in some guaranteed income.

What I'd actually do if I were in this position: run three scenarios. Conservative scenario—lower withdrawal rate, delay Social Security, plan for higher health costs. Middle scenario—moderate withdrawal, claim at full retirement age, stay flexible. Bridging scenario—earn some income until 65 while taking lower withdrawals, then reassess. See which one feels realistic and which one breaks if something goes wrong.

The key is stress-testing. If a small change in assumptions kills your plan, you need a backup. Early market downturns hit different when you're withdrawing from a $400k balance. Sequence risk is real.

Bottom line: retiring at 62 with $400,000 in 401k is possible but requires honest scenario work, not wishful thinking. Don't just trust one rule. Build multiple versions of your retirement, see where they break, and adjust accordingly. That's how you actually know if you're ready.