A little while ago I stumbled on a statistic that stopped me mid-scroll: as of early 2026, the investment firm Fidelity counted roughly 645,000 people who are millionaires inside their 401(k) retirement account alone. Not counting their house, their savings, or anything else — just their workplace retirement account had crossed a million dollars.
My first reaction was the same one you might be having: “Wow, the American retirement system must be incredible.” And there’s some truth to that. But when I actually dug into the numbers, I found a lesson that was far more useful — and far more encouraging for a regular person like me — than “America is just rich.” It’s the reason I now funnel almost all of my investing through my own country’s version of a retirement account. Let me walk you through it.
First, does “645,000 millionaires” mean the system is magic?
It’s tempting to look at that headline and assume everyone with a 401(k) is quietly getting rich. So let me share the honest other half of the data, because I promised on day one that this blog would never sell you a fantasy.
According to Fidelity’s own figures, the average 401(k) balance in early 2026 was about $141,000. And the median balance — the person right in the middle — was closer to $32,800. That’s a huge gap, and it tells you something important: the eye-popping average is pulled way up by a relatively small number of very large accounts. Most people are not sitting on a million dollars.
So no, the retirement account is not a magic money machine. If it were, everyone who had one would be a millionaire, and they’re clearly not.
The real lesson hiding in the numbers
Here’s the part that genuinely changed how I think.
Fidelity looked at who these 401(k) millionaires actually are. On average, they are around 59 years old, and they had been contributing to the same retirement plan for about 26 years.
Read that again. Twenty-six years. These aren’t lottery winners or crypto gamblers or stock-picking geniuses. They are, overwhelmingly, ordinary workers who did one unglamorous thing: they kept contributing to the same account, month after month, for decades — straight through crashes, recessions, and scary headlines. Fidelity even has a name for it: “savings stamina.”
That’s the whole secret. Not a hot tip. Not perfect timing. Just an ordinary amount of money, invested consistently, inside the right kind of account, given enough time to compound. And that is a recipe a regular person can actually copy — including me, and including you.
So what makes a “retirement account” so special?
If consistency is the engine, the retirement account is the high-performance chassis that lets the engine run at full speed. Different countries have different versions — the 401(k) and IRA in the United States, and in my country a system of tax-advantaged pension savings accounts — but the core superpowers are the same:
1. A tax break that pays you now. When I put money into my pension account, I get a chunk of it back as a tax deduction. That’s an immediate, guaranteed return before the market does anything at all. In a world where nothing is guaranteed, that’s remarkable.
2. Tax-deferred compounding. Inside the account, my dividends and gains aren’t taxed year after year. That means the money that would have gone to taxes stays invested and keeps compounding. Over decades, that difference is enormous — it’s like letting a snowball roll downhill without stopping to shave pieces off it every winter. This is exactly what makes my long-term projections work: the goose grows faster because the tax collector waits until the very end.
3. It locks me in — on purpose. Here’s the one most people see as a downside, and I see as a feature. My retirement money is hard to touch until I’m older. I can’t panic-sell it during a crash and I can’t raid it for an impulse purchase. If you’ve read my other posts, you know my biggest investing risk isn’t the market — it’s me. The retirement account quietly protects me from my own worst instincts by putting my future savings behind a locked door that only my future self can open.
Three Things Make It Work — and Only One Is the Tax Break
When I first read about those 645,000 millionaires, I assumed the tax treatment was the whole story. It isn’t. The American system quietly does three separate things, and two of them have nothing to do with tax at all.
1. The employer puts money in too. Many US employers match a portion of what the worker contributes — a common shape is fifty cents for every dollar, up to around 6% of salary. Think about what that actually is: an immediate, guaranteed return on the money, before it has been invested in anything. No fund manager on earth offers that.
2. Enrolment happens by default. Since 2025, most newly established 401(k) plans in the US are legally required to enrol employees automatically, at a starting rate of at least 3% of pay, rising by at least a percentage point a year until it reaches at least 10%. You have to opt out to not save. That single reversal — making saving the default instead of the decision — moves more people than any amount of financial education ever has.
3. The money never touches the bank account. Contributions come out of payroll before the paycheque arrives. You never see it, so you never budget around it, so you never have to resist spending it.
Notice what all three have in common. They remove a decision. The tax advantage is real, but the structural genius of the system is that it makes the right behaviour automatic and the wrong behaviour require effort.
That reframing changed my own setup — but it also forces me to complicate my own story, so let me do that now.
I do get an employer contribution. My company pays an amount equal to 3% of my salary into my personal pension account, spread across the year, and I put in a matching amount from my own paycheque. In substance it’s the same thing an American gets from a 401(k) match, and on the match rate it’s actually more generous — one won for one won, rather than the fifty-cents-on-the-dollar formula that’s common in the US.
But I want to be very clear that this is not how Korea works. It’s a benefit my employer chose to offer, not a feature of the national system, and most Korean workers I know don’t have anything like it. I got lucky. I’d rather say that plainly than let you read my numbers and assume the country provides it.
What I could give myself were numbers two and three: I made the contribution automatic, and I made it leave before I ever see the money.
Korea and the United States, Side by Side
People ask me how the Korean accounts compare, usually expecting a simple better-or-worse answer. It isn’t simple, so here is the actual shape of it.
| Korea | United States | |
|---|---|---|
| Workplace account | IRP / DC pension | 401(k) |
| Personal account | Pension savings | IRA |
| 2026 tax-favoured amount | ₩9m (about $6,000) | $32,000 combined |
| Benefit arrives as | Cash refund | Lower taxable income |
| Rate of benefit | 16.5% or 13.2% | Your tax bracket |
| Employer match | Rare | Common |
| Automatic enrolment | No | Required for new plans |
US figures come from the IRS announcement for 2026: $24,500 into a 401(k) plus $7,500 into an IRA, with more allowed from age 50.
One clarification the table is too small to hold, and it matters. The ₩9,000,000 is the amount that earns the tax credit — it is not the amount you’re allowed to deposit. Korean pension accounts accept up to ₩18,000,000 a year in combined contributions. Only the first ₩9,000,000 gets money back. I’ll come back to why anyone would deliberately pay in above that line.
Read the third row and the gap is obvious. An American can shelter roughly five times what I can. Over twenty-six years — the average tenure of those 401(k) millionaires — that difference compounds into an entirely different destination. This is the honest answer to why America produces so many more of them, and it isn’t because Americans are more disciplined.
When the Compounding Clock Starts
There’s a bigger difference than the ceiling, and it took me years to see it because it hides inside a word that gets translated badly.
Korean workers have something called toejikgeum — a retirement allowance. It sounds like a pension, and English articles usually render it as one, but structurally it is a different animal. In the traditional form, it is calculated at the end: your average salary over your final three months, multiplied by your years of service.
Read that again and notice what’s missing. There is no market in that sentence. The money isn’t sitting in an account buying index funds for twenty-six years. It’s a formula waiting to be applied, and the only variable that really matters is what you happen to earn in your last quarter of work. When you leave, the amount transfers into a retirement account, and only from that day forward can it actually be invested.
So compare the two clocks:
- A 401(k) starts compounding on the day you’re hired.
- A traditional Korean retirement allowance starts compounding on the day you leave.
Twenty-six years of compounding versus zero, on that portion of the money. That gap dwarfs the contribution-limit gap, and it is the honest answer to why one country produces so many retirement millionaires and the other doesn’t. It isn’t discipline. It’s where the compounding clock is allowed to start.
One consequence for my own numbers: I leave that money out of my net worth entirely. Every figure I publish on this site excludes it. It will be real one day, and it will land in an account I control, and I’d rather be pleasantly surprised at the end than count something now that depends on a salary I haven’t earned yet.
What Korea Gives Instead
Now read the fourth and fifth rows, because that’s where the Korean system is genuinely better, and almost nobody frames it this way.
In the US, the benefit is a deduction: your taxable income goes down, and you feel it as a slightly smaller tax bill somewhere in the machinery. In Korea, the benefit is a tax credit — an actual refund, in cash, at year-end settlement. Fill the ceiling and roughly ₩1,485,000 comes back at the 16.5% rate.
Let me put that in the terms this blog cares about. That money returned 16.5% before it was invested in anything. Not projected. Not average. Returned, in the same tax year, regardless of what the market did.
I spend a lot of words on this site being careful about expected returns, because nobody can promise them. This is the one place where I don’t have to hedge. It is the closest thing to a free lunch I have found in nine months of writing about money, and it is available to every salaried worker in the country, and most of the ones I know don’t fill it.
So: smaller ceiling, better mechanism. If you can only max one thing, in Korea it should be this one, and it isn’t close.
The Layer I Build on Purpose Without the Tax Break
Here’s the part that confuses people when I describe my setup, and it’s the reason I mentioned the ₩18,000,000 deposit ceiling earlier.
I fill the ₩9,000,000 that earns the refund. Then I keep paying into a second pension account that earns no tax credit at all.
Why would anyone do that voluntarily? Because money that never received a tax benefit is not treated the same way on the way out. In Korea, the portion of your contributions that never claimed the credit is exempt from the pension income tax that applies to the rest when you eventually draw on it — and it isn’t subject to the same clawback logic, because there was never anything to claw back.
What I’m buying with that layer isn’t a return. It’s optionality. When I’m older and pulling money out, having a pool that isn’t taxed the same way as everything else gives me a lever to manage which year’s income sits in which bracket. Retirement isn’t one decision; it’s thirty years of small withdrawal decisions, and having two differently-taxed buckets makes those decisions easier.
Two honest caveats. First, this only makes sense after the credit-earning ceiling is full — taking a certain refund always comes first. Second, in Korea the exemption isn’t automatic: you have to register those contributions as uncredited with your provider and the tax office, or the paperwork won’t know which won is which. If you’re reading this from another country the specifics will differ entirely, and this is exactly the kind of question to put to a qualified professional rather than to a blog.
So my structure has three layers: the part my employer helps with, the part that earns the refund, and the part that buys flexibility. Only the middle one is conventional advice.
Why I pour my money into these accounts
Once I understood all this, my choice became obvious. I don’t chase exciting stocks in a regular trading account. Instead, month after month, I invest through my country’s pension savings accounts, and I buy the same broad, low-cost, S&P 500-centered funds every time.
I’m essentially trying to become one of those “boring” 26-year millionaires on purpose — copying the one behavior that the data says actually works, inside the accounts specifically designed to reward it. The tax deduction gives me an instant head start. The tax-deferred growth lets my dividends compound without leaking. And the locked door keeps me from sabotaging the whole plan on a bad day.
The American 401(k) millionaires didn’t get there because they were special. They got there because a good account plus a boring habit plus a lot of time is a genuinely powerful combination. I can’t do anything about how much time has already passed. But I can absolutely control the account I use and the habit I keep — and so can you.
Questions I Get Asked
Isn’t the money locked up until I’m old?
Largely, yes, and withdrawing early usually means giving back the tax benefit. I treat that as a feature rather than a cost. The illiquidity is what stopped me raiding the account in my thirties, which is precisely the behaviour that separates the people in the Fidelity statistic from everyone else.
What if I change jobs?
The account follows you. That’s the entire point of these structures. The people who ended up as 401(k) millionaires averaged 26 years in a plan, not 26 years at one company.
Should I fill the retirement account before a regular brokerage account?
In my own case the order is settled: the tax-favoured ceiling first, everything else after. A certain refund beats an uncertain return. Your situation may differ, and this is one of those questions worth putting to someone qualified in your own country rather than to a blog.
What do I actually buy inside the account?
Broad index funds, mostly tracking the S&P 500, bought automatically each month. The account is the container; it doesn’t invest anything by itself. A tax-advantaged account sitting in cash is a very well-organised way of earning nothing.
Is 26 years really the requirement?
No — 26 years is what the current millionaires happened to have. It’s an observation, not an entry fee. The useful version of that number is simpler: the ones who got there were the ones who didn’t stop.
The takeaway
The huge number of retirement-account millionaires isn’t proof that the system hands out riches. It’s proof of something better: that ordinary, consistent investing, sheltered inside a tax-advantaged account and left alone for a long time, quietly works. That’s not a secret reserved for Americans or for the wealthy. It’s a blueprint. It’s the exact one I’m following, one automatic contribution at a time.
This post is part of my honest, public journey from roughly $96,000 in savings toward $100,000 a year in passive income. I’m a 40-something engineer, not a financial advisor or a tax professional, and nothing here is financial advice — tax rules and retirement accounts differ by country, so please do your own research and check your local rules before investing.