Why Hold Investments in a Tax-Advantaged Account

Start NowStart Now · Part 6. A free series on building your own tax-free pension, one move at a time. New here? Start from the beginning →Thanks for reading Start Now! Subscribe for free to receive new posts and support my work.Greg M. Ostroff, CFAThe Idea · Chapter TwoWhy Hold Investments in a Tax-Advantaged AccountA Story · The Same Thousand DollarsGrace owns a neighborhood café she built from nothing. There is no employer plan behind her, because she is the employer: no paycheck, no withholding, just the quarter’s profit and a check she writes to the IRS four times a year. Income tax is coming for this money no matter what she does. So one evening after closing, she sets aside $1,000 of profit for her future. Think of it as a seed. Planted and left alone for forty years, it will grow into something many times its size: the harvest. Grace has three places she could plant it, three doors, and the income tax was never the choice. What the taxman is allowed to touch, and when, is.Behind the first door is an ordinary brokerage account. The seed is taxed before it goes in the ground, and then the taxing never stops: every dividend taxed each spring, and when she finally sells, decades from now, the harvest is taxed too. Seed taxed, growth taxed, harvest taxed. The money works its whole life with a hand reaching into its pocket.Behind the second door is a Traditional IRA. Here the government makes her an offer: plant the seed untaxed, settle up later. It feels generous. But later means retirement, when every dollar she withdraws, seed and forty years of growth alike, is taxed as ordinary income. The government skipped the seed to wait for the harvest, and the harvest is the biggest pile she will ever have.Behind the third door is a Roth. She pays her tax on the seed this year, the same as door one, and then something unusual happens: nothing. No tax on the growth. No tax on the harvest, not in her sixties, not in her nineties. The hand touches the money exactly once, while the pile is at its smallest, and never again.Same woman. Same thousand dollars. She could even plant the identical investment behind all three doors. The only difference is when the tax lands, and over a working life that one difference is worth a lot of money; in Grace’s case, as Chapter 5 will show, hundreds of thousands of dollars. The whole chapter comes down to a single question: tax the seed, or tax the harvest? The Roth taxes the seed.✦If compounding is the engine, taxes are the friction. Every dollar paid in tax along the way is a dollar that stops compounding. A dollar not invested early is enormously expensive in lost future growth. Tax-advantaged retirement accounts exist to remove that friction, and over a lifetime the difference is substantial.Of the accounts this chapter compares, this book builds on one in particular: the IRA, the individual retirement account. It is the one account almost anyone with earned income can open on their own — no employer, no workplace plan required — which is exactly why it has quietly become the single largest pool of retirement savings in the country. The Roth is its fully tax-free version, and that is the account this book is built on. (Deep Dive H maps where the IRA sits within the whole U.S. retirement system.)2.1How the three accounts actually workWhen you hold your investments in an account at a brokerage firm, there are three main kinds to choose from, each taxed in a very different way: an ordinary taxable account, a traditional IRA, and a Roth IRA. Which one you choose does more to shape your final result than almost any other decision in this book, so it helps to see exactly how each one works.Imagine you have $1,000 of pre-tax earnings to put toward retirement this year, and your income-tax rate is 24%.34* Roth IRA: pay tax now, never again. You pay income tax on the money first, so about $760 goes in. It grows for decades, and in retirement the entire balance, your contributions and all of the investment growth, comes out completely tax-free. Nothing is taxed on the way out, at any rate.* Traditional IRA: skip tax now, pay it later as income. The contribution is pre-tax, so the full $1,000 goes in and your taxable income drops by $1,000 this year, a tax saving of about $240 today. The money grows untaxed. But every dollar withdrawn in retirement, contributions and growth alike, is taxed as ordinary income, the same schedule as a paycheck, which is higher than the capital-gains rate.* Taxable account: pay tax now, a little each year, then the lower capital-gains rate at the end. Like the Roth, you invest after-tax money, so about $760 goes in. Unlike the IRAs, it is taxed as you go: dividends are taxed every year, a small but steady drag. When you finally sell, your gains are taxed at the long-term capital-gains rate, which is lower than ordinary income rates.Notice that the same $1,000 of earnings does not start equal in each account:The same $1,000 of pre-tax earnings enters each account differently: the deduction lets the Traditional invest the full $1,000, while the Roth and the taxable account invest $760 after tax.Dollar for pre-tax dollar, at the same tax rate today and in retirement, the Traditional and the Roth come out exactly even. The Traditional’s larger $1,000 head start is cancelled precisely by the ordinary-income tax due at the end, landing in the same place as the Roth’s $760 growing tax-free.What breaks the tie is the contribution limit. The limit caps the nominal amount, not the pre-tax amount: at most about $7,500 either way. And $7,500 of already-taxed Roth money shelters more real wealth than $7,500 of pre-tax Traditional money that still owes income tax. So a saver who maxes out, as the case studies assume, quietly gets more into the Roth, and it pulls ahead.The Traditional saver has one way to close that gap: invest the yearly tax refund the deduction produces, in a separate account. Do that, and the Traditional roughly ties the Roth. But most people spend the refund. Then only the capped contribution compounds, and it is taxed at the high ordinary rate on the way out. A taxable account, whose gains face only the lower capital-gains rate, can end up ahead of the Traditional. That realistic, spend-the-refund assumption is the one this book uses (see Section 3.3).One thing never changes: the Roth. Because it is taxed neither along the way nor at withdrawal, the Roth beats the taxable account in every scenario: the taxable account always pays at least the yearly dividend tax and the final capital-gains tax that the Roth escapes entirely. The interesting contest is between the Traditional IRA and the taxable account; the Roth sits above both. Inside either IRA, dividends and gains are also never taxed year to year, so the full balance compounds untouched, the taxable account’s annual drag is the price of having no contribution limit.2.2The advantages of the RothFor a long-horizon investor, the Roth structure carries several distinct advantages:* Decades of growth come out tax-free. In the case studies, a few hundred thousand dollars of contributions grows into millions. In a Roth, every dollar of that growth is yours.* No required minimum distributions (RMDs). Traditional IRAs force taxable withdrawals beginning at age 734 whether you need the money or not. Roth IRAs have no such requirement during the owner’s lifetime, so the balance can keep compounding untouched, exactly the behavior modeled in these case studies.* A hedge against higher future tax rates. A Roth locks in today’s tax cost. If income-tax rates rise over the coming decades, the Roth holder is unaffected, while the Traditional holder pays the higher future rate on every withdrawal.* “Denser” dollars when you max out. $7,500 in a Roth is $7,500 of spendable, already-taxed money. $7,500 in a Traditional IRA still has a tax bill attached. For a saver who hits the contribution limit, the Roth therefore packs more real, after-tax wealth into the same capped contribution.* Tax-free to heirs. Inherited Roth assets generally pass to beneficiaries tax-free, making the Roth a powerful vehicle for transferring wealth as well as funding retirement.One qualification sits under all of this: the entire tax-free promise rests on current law, and Congress can change tax law. Proposals to cap very large Roth balances or alter the rules surface from time to time. This is worth a sentence of awareness, not worry: wholesale repeal of a benefit that tens of millions of ordinary savers rely on is a heavy political lift, and nothing about today’s law suggests the core deal is going away. Plan on the rules holding; just don’t assume they are carved in stone.✦✦A Note for W-2 EmployeesIf Your Job Has a 401(k)If you have a company 401(k), read this. If you don’t, skip to the next chapter.If you’re a W-2 employee, on a company’s payroll, with taxes withheld from each paycheck, the first retirement account you meet probably isn’t the Roth IRA; it’s the 401(k), offered through your employer. That’s fine. The 401(k) is a good tool, and everything this book teaches (start early, own a low-cost index fund, let it compound untaxed, don’t sell) works exactly the same inside it. The one real difference is tax on the way out: a traditional 401(k) is taxed when you withdraw it, while a Roth comes out entirely tax-free. That is why this book uses the Roth to see the idea in its cleanest form. Here’s how the 401(k) and the Roth IRA fit together. (If you’re an independent contractor, you get a 1099, not a W-2, and you’re considered self-employed for retirement purposes; your version, the solo 401(k), is in Deep Dive I.)There’s one rule that comes before everything else in this book, and it applies only to you: if your 401(k) offers an employer match, contribute enough to get the full match first. A match is free money: your employer adds, say, fifty cents or a dollar for every dollar you put in, up to a limit. That’s an instant 50% or 100% return before the market does a thing, and nothing in these pages can beat a guaranteed doubling of your money. So the order is:* 1. Contribute to the 401(k) up to the full match, free money, first.* 2. Then fund a Roth IRA, the account this book is built around, for its tax-free growth and flexibility.* 3. Then, if you can, put more into the 401(k), up to its limit.A few things worth knowing:* You can do both in the same year. A 401(k) and a Roth IRA are separate buckets with separate limits: in 2026, up to $24,500 in the 401(k) and another $7,500 in the Roth IRA. They don’t reduce each other.* Many 401(k)s now offer a Roth option. A “Roth 401(k)” works just like the Roth in this book (after-tax in, tax-free out) but with the much higher 401(k) limit. Same idea, bigger scale. Early in your career, when your tax rate is relatively low, choosing it over the traditional, pre-tax option is usually the better call, so if your plan offers a Roth 401(k), make that choice on purpose rather than leaving it to a default.* The match may “vest” over time. Some employers require you to stay a few years before their contributions are fully yours; your own money is always yours immediately.* When you leave a job, the 401(k) comes with you. You can roll it into an IRA. Nothing is stranded.Case Study · Sophia, 26Sophia is 26, a mechanical engineer at an aerospace company. When she signed her offer letter, the match was one line in the benefits packet, and nobody at the company ever mentioned it again. She looked it up herself and realized what that line actually said: free money, every paycheck, for anyone who asks. Her employer matches 401(k) contributions dollar-for-dollar up to 5% of her salary, so her first move is to put in that 5%. She isn’t leaving a 100% return on the table. Then she opens a Roth IRA and funds it for the tax-free growth and flexibility. With both running, she circles back and pushes her 401(k) higher. Same principle, three steps, no wasted dollars. And if she eventually maxes the 401(k) too, the totals climb far higher still. It’s the same math, just more fuel. Run those three steps for a working lifetime and Sophia finishes ahead of every table in the chapters ahead: she started four years before Maya, and her employer paid for part of every mile.That’s the whole of it if you work for a company: grab the match, then follow the same moves as everyone else. From here, the rest of the book reads the same whether your dollars sit in a Roth IRA or a 401(k). The vehicle changes, and its tax timing can too, but the engine does not: start early, own the index, let it compound, and don’t sell.Coming next: 3 · Case StudiesA NOTE FROM THE AUTHORStart Now is free to read and free to share. A new part publishes free every Sunday. Subscribe to get each part in your inbox as it goes out.If you find that it helps you, the kindest thing you can do is subscribe and pass it to one person who needs it.If you’d like to give back, pay it forward: donate any amount to a cause you believe in. 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