"Can I retire?" is one of the most searched questions in personal finance, and also one of the most poorly served by a single yes-or-no answer. The honest response is almost always: it depends on things you haven't specified yet. Not because the question is unanswerable, but because it's actually four separate questions wearing a trench coat.

Here's what those four questions really are, and what needs to be true for each one before the overall answer is genuinely yes.

Question 1: Does your money last as long as you might?

This is the one most calculators focus on, and for good reason — it's foundational. Take your savings, your expected spending, a reasonable investment return, and project forward. The honest version of this question isn't "will my money last to age 85" — it's "will my money last to age 95 or 100," because increasingly, people are living that long, and running out of money at 90 is a much worse outcome than having some left over.

This question is also where the order you spend your money — not just how much — starts to matter (a topic worth its own read, but the short version: which account you draw from first can be worth tens of thousands of dollars over a retirement).

Question 2: Can you bridge the gap before Medicare?

If you're retiring before 65, this question is arguably more urgent than the first one, and it's the one people are most likely to overlook. Between leaving your job and becoming eligible for Medicare, you need health coverage — usually through an ACA marketplace plan — and the subsidy that makes it affordable is based on your income during exactly those years.

This isn't a small detail. Get it wrong, and you can lose a health insurance subsidy worth thousands of dollars in a single year, over a decision (a big withdrawal, a large capital gain, a Roth conversion) that seemed unrelated to healthcare at the time. "Can I retire" quietly depends on "do I have a plan for these specific years," not just "do I have enough money overall."

Question 3: Have you accounted for what taxes do to your number?

A savings balance is not the same as spendable money. Money in a traditional 401(k) or IRA still owes income tax when it comes out. Money in a Roth account generally doesn't. Money in a regular brokerage account owes tax only on the gains, often at a lower rate.

"Can I retire on $1.5 million" has a very different answer depending on how much of that $1.5 million is pre-tax versus already-taxed. Two people with identical account balances can have meaningfully different amounts of money they actually get to spend, purely based on account type — and the decisions you make in the years right after retiring (particularly around Roth conversions) can shift that outcome substantially in either direction.

Question 4: What happens if the market misbehaves right when you start?

This is the quiet one. A retirement plan that looks perfectly fine on an average-return basis can still be fragile against a specific, well-known risk: a market downturn in the first few years of retirement, while you're also withdrawing money. This is called sequence-of-returns risk, and it's a different question from "will my money last on average" — it's "does my plan survive if the first five years go badly, specifically."

A plan that hasn't been checked against this scenario hasn't really answered "can I retire" — it's answered "can I retire if the market behaves the way it usually does," which isn't the same thing.

Putting the four together

Notice that none of these four questions can really be answered in isolation. Your tax situation affects how much of your balance is truly spendable, which affects whether your money lasts. Your healthcare bridge-years income affects your tax picture. A bad sequence of returns early on affects everything downstream. "Can I retire" isn't a single calculation — it's four calculations that all lean on each other, which is exactly why a single percentage or a single "yes" can be misleading if it isn't actually accounting for all four at once.

So, can you?

If you can answer all four of the following with real numbers — not gut feelings — you're in a genuinely strong position to answer "yes":

  1. My money lasts comfortably to age 95+, under a range of market outcomes, not just the average one.
  2. I know exactly how I'll bridge health coverage until Medicare, and I know how close my income runs to the subsidy cliff each of those years.
  3. I know how much of my balance is actually spendable after tax, not just its face value, and I have a plan for the account order I'll draw from.
  4. My plan has been checked against an early bad sequence of returns, not just an average one.

If any of those is a "not sure," that's not a reason to panic — it's simply the actual next thing worth figuring out before the bigger question can be answered honestly.

Why this is harder than it should be

Part of the reason "can I retire" feels so hard to answer is that these four questions are usually handled by four different tools, or four different tabs in the same tool, none of which talk to each other. Your healthcare bridge-year income affects your taxes. Your taxes affect how much of your balance is real. How much is real affects whether your money lasts. A plan that answers each question separately, without connecting them, isn't really answering "can I retire" at all — it's answering four smaller questions and hoping they add up. The more useful version shows all four moving together, year by year, so a decision in one area and its effect on the other three are visible at the same time, not discovered later.