Should You Skip the 401(k)? A CPA's Contrarian Math

By Tom, CPA · Updated October 25, 2026

TL;DR: Get the employer match first. A 401(k) or IRA is worth roughly 0.5% to 1% a year on index funds, but taxable assets already defer gains until you sell, and losses inside the account are wasted. A proven venture can win; most aren't proven, so score yourself before skipping.

Educational only, not tax, legal, or investment advice. Examples are illustrations, not predictions. Rules and limits change; verify current figures and talk to a qualified professional about your situation.

Should you skip the 401(k)? Short answer first, because someone will screenshot this: get the employer match first. A match is an instant 50% to 100% return, and nothing in this article beats free money with a bow on it. Now that the compliance gremlin is fed, let's be contrarian.

Here is the heretical thought. A 401(k) or IRA is basically a nonprofit for your money. It pays no tax on its earnings, just like a charity. In exchange it takes a vow of poverty: no self-dealing, no personal benefit, no running a business without a tax bill, and a short list of things you may and may not do with it. That deal is fantastic for index funds. It is a lot less fantastic for someone who can turn $7,500 of inventory into $30,000 of sales, buy a duplex with a sweat-equity rehab, or fund a side business that is already working.

So the honest question isn't "are retirement accounts good?" (they are). It's "what is the wrapper actually worth per dollar, and can your best alternative use of that dollar beat it after tax and after risk?" Let's run the math like a CPA who has had exactly one coffee.

CPA Warning Label: Running your own business or rental through an IRA is how a retirement account turns into a fully taxable distribution in one afternoon. Keep ventures outside, and never self-deal.

The 401(k) as a nonprofit: tax-exempt, no fun allowed

Retirement accounts are tax-exempt trusts. The price of that exemption is a set of rules that looks a lot like what a charity accepts:

• No self-dealing. Internal Revenue Code section 4975 bans transactions between the plan and "disqualified persons": you, your spouse, your parents and grandparents, your kids and grandkids and their spouses, plan fiduciaries, and entities you own 50% or more of. You can't sell your IRA a property, lend it money, live in its rental, or fix its rental with your own hammer.
• A nuclear failure mode. If an IRA owner engages in a prohibited transaction, the IRA stops being an IRA as of January 1 of that year, and the whole account is treated as distributed (IRC 408(e)(2)). That means income tax on everything, plus the 10% early penalty if you're under 59½. The Tax Court has applied this to a personal guarantee of a loan to the IRA's company (Peek v. Commissioner, 140 T.C. 216 (2013)) and treated gold coins a checkbook-IRA owner kept at home as distributions (McNulty v. Commissioner, 157 T.C. No. 10 (2021)).
• Business income gets taxed anyway. If the account runs an active trade or business, or owns debt-financed property, the income can be unrelated business taxable income (UBTI). The account files Form 990-T and pays tax at trust rates after a $1,000 specific deduction. For 2026, trust rates hit 37% above just $16,250 of taxable income. (A solo 401(k) has a narrow exception for some debt-financed real estate under IRC 514(c)(9). It doesn't cover an operating business.)
• Losses vanish. If an investment inside an IRA goes to zero, you don't get a capital loss deduction. The money just quietly leaves the building.

None of this is a scandal. It's the deal. But it means the account is a great home for passive, boring assets and a terrible home for anything you actively run.

What the 2025-2026 alternatives push changed (and didn't)

In August 2025, Executive Order 14330, "Democratizing Access to Alternative Assets for 401(k) Investors," directed the Department of Labor to revisit its guidance on alternatives such as private equity, private credit, real estate, digital assets, commodities and infrastructure. On March 31, 2026, the Labor Department's Employee Benefits Security Administration published a proposed rule, "Fiduciary Duties in Selecting Designated Investment Alternatives" (RIN 1210-AC38). As of October 25, 2026, it is still a proposed rule, not a final one.

Translation: your employer may someday add a target-date-style fund with a slice of private equity in it. That is not the same as letting you put your own flip business, your own rental, or your cousin's food truck inside your 401(k). The self-dealing rules above didn't move. The thesis of this article survives the new rules intact, with a small hat tip to the regulators for trying.

The math: what the tax wrapper is actually worth

Let's measure the wrapper on its home turf, a plain index fund, so we know the number a venture has to beat.

Illustration (assumptions): $10,000 invested once, 7% annual return, 25 years, no dividends taxed along the way (generous to the taxable account), 15% long-term capital gains rate on the gain at the end. These are illustrations, not predictions.

The Roth ends up about 13.9% ahead. Spread over 25 years, that's roughly 0.5% a year of extra return. Add realistic dividend drag in a taxable account and the gap widens, so call the wrapper worth roughly half a percent to one percent a year on index funds. Real, valuable, compounding, and also not magic.

Worked example: Venture vs. Tax Wrapper

Illustration (assumptions): Frugal Fran has $7,500. Option A: a Roth IRA index fund earning 7%. Option B: her inventory-flipping side business, where one turn of $7,500 has historically produced $22,500 of net profit (a 300% return on cost). She is a sole proprietor in the 22% bracket, qualifies for the full 20% qualified business income deduction, and has no other self-employment income. State tax ignored.

On paper the venture wins by about 30 to 1. Note what happens if Fran tries to do the flipping inside a self-directed IRA instead: the profit is likely UBTI taxed at trust rates, and if she does the sourcing and selling herself, she's probably providing services to her own IRA, which is the kind of thing section 4975 exists to punish. The venture belongs outside the account. The real question is only whether her cash should go to the venture first.

Now the asterisks, which are doing a lot of work: that 300% has to repeat, it has to scale with more capital (most flipping is limited by Fran's time, not her cash), and the business can't fail. Many do. Labor returns are not capital returns, and Fran's evenings are not free.

Tax tools you keep outside the account

Owning a venture or property in your own name (or your own LLC) keeps tools a retirement account throws away:

• Depreciation on rental property, which can shelter rental income (see the real estate depreciation guide). Inside an IRA, depreciation doesn't help you at all.
• 1031 exchanges to defer gain when you swap properties.
• The QBI deduction, made permanent by the 2025 tax law for tax years after 2025, with phase-in thresholds of $75,000 single and $150,000 joint.
• Leverage without UDFI, which matters for strategies like house hacking.

Your taxable account is already a deferral machine

Here's the part the "max everything" crowd skips: an unrealized gain isn't taxed. Buy a stock, a rental or a slice of your own company, hold it, and the appreciation compounds with zero annual tax. You owe nothing until you sell, and you pick when that is. That's tax deferral without a contribution limit, a custodian or a 59½ rule.

• You control the timing. Sell in a low-income year, like a sabbatical or the early years of FIRE, and long-term gains can land in the 0% bracket. For 2026, the 0% rate applies up to $49,450 of taxable income for single filers and $98,900 for joint filers (see 0% capital gains harvesting).
• Preferential rates. Long-term gains top out at 15% or 20% (plus the 3.8% net investment income tax for high earners), while every traditional 401(k) withdrawal is ordinary income.
• Step-up at death. Under IRC 1014, heirs generally get a basis equal to fair market value at death, so a lifetime of deferred gain can simply never be taxed. Nothing inside an IRA gets this.
• Give it away. Donating appreciated shares held over a year generally gets you a fair-market-value deduction (subject to AGI limits) and nobody pays the gain.
• Real estate extras. Depreciation, 1031 exchanges and sometimes the QBI deduction, covered above.

Now the honest counterweights, because "deferral" has fine print:

• Not everything defers. Dividends, interest, short-term gains and mutual fund capital gain distributions are taxed every year. Broad index ETFs distribute little, but "little" isn't zero.
• Ordinary-income ventures get nothing. Flips, inventory and short-term trades are taxed as you go. Fran's 300% flip business from the example above defers nothing, so this argument helps the rental and the buy-and-hold stake, not the hustle.
• Rebalancing costs you. Selling to rebalance in a taxable account triggers gains. Inside a 401(k) you can trade all day, tax-free.
• The wrapper still starts ahead. A traditional account adds an upfront deduction; a Roth makes growth permanently tax-free, which beats "taxed later, maybe at 0%." Deferral is good. Never is better.

Capital gains vs. ordinary income, and who controls the clock

Here's the part of the deal nobody prints on the brochure: a traditional 401(k) or IRA launders capital gains into ordinary income. It doesn't matter whether the money inside earned long-term gains, qualified dividends or interest. Every dollar that comes out of a traditional account is ordinary income, taxed at up to 37%. The same long-term gains and qualified dividends earned in a taxable account get 0%, 15% or 20%. For 2026 (Rev. Proc. 2025-32), the 0% rate applies up to $49,450 of taxable income for single filers ($98,900 joint), and 15% applies up to $545,500 ($613,700 joint). High earners add the 3.8% net investment income tax above $200,000 of MAGI ($250,000 joint), and those thresholds aren't indexed.

You pick the year, unless it's a 401(k)

A taxable holding has no required distributions. You can sell in a low-income year, harvest gains at 0%, donate appreciated shares, spread a sale over several years with an installment sale (IRC 453), swap real estate with a 1031 exchange, or hold until death for the step-up in basis. Or you can never sell at all.

The timing of 401(k) withdrawals is often not yours to choose:

• RMDs. Under SECURE 2.0, required minimum distributions start at age 73 if you were born 1951 to 1959, and at 75 if you were born in 1960 or later. They're taxable whether or not you need the cash.
• Heirs get a deadline. Most non-spouse beneficiaries must empty an inherited account within 10 years. Under the IRS final regulations issued in 2024, they also take annual RMDs in years 1 to 9 if the owner had already started RMDs. Those distributions often land in the heirs' peak earning years.
• The 59½ gate. Withdrawals before 59½ generally cost a 10% penalty on top of income tax. The workarounds are real but partial: 72(t) SEPP, the rule of 55 and other exceptions.
• Plan rules. Many employer plans restrict in-service withdrawals while you still work there, and some limit partial distributions after you leave. Your money, their paperwork.
• Side effects. Forced ordinary income can raise IRMAA Medicare surcharges, make more of your Social Security taxable, and shrink ACA premium credits before 65 (see ACA MAGI management).

Illustration (assumptions): the same $44,274 of growth from the wrapper example above, with long-term capital gain character outside and ordinary income at 24% inside.

Ouch. But this is the balance section, so in fairness to the 401(k): that table ignores the deduction. A $10,000 traditional contribution at 24% costs only $7,600 of take-home pay, so the fair comparison is $10,000 going into the 401(k) and $7,600 going into a taxable account. After 25 years at 7%, the 401(k)'s $54,274 withdrawn at 24% leaves $41,248. The taxable account grows to $41,248, and after 15% on the $33,648 gain it leaves $36,201. The traditional account still wins, and at a 12% retirement bracket it leaves $47,761. The taxable account only comes out ahead if the withdrawal rate is above roughly 33% or the money never got a deduction in the first place. Add the employer match and it isn't close.

Other honest asterisks:

• Roth money is different. Qualified Roth withdrawals are tax-free, Roth IRAs have no lifetime RMDs, and Roth 401(k)s have had none since 2024.
• QCDs soften RMDs. From age 70½, up to $111,000 for 2026 can go straight from an IRA to charity, tax-free, and it counts toward your RMD.
• Capital gain character is only for capital assets. Flips, inventory, short-term trades and interest are ordinary income outside the account too.

So this argument favors buy-and-hold assets you'd own anyway, especially for people whose retirement bracket won't be much lower than today's.

Tax losses go to die inside a 401(k)

Inside a 401(k) or IRA, a loss is invisible to the IRS. No Schedule D, no ordinary loss, no carryforward, no tax-loss harvesting. Outside, losses are a real asset:

• Capital losses offset capital gains in full, plus up to $3,000 a year of ordinary income ($1,500 married filing separately), with the rest carried forward indefinitely (see the capital loss carryforward guide and tax-loss harvesting).
• Business and rental losses can offset other income, subject to the basis, at-risk and passive activity limits and the excess business loss cap under IRC 461(l) ($256,000 single, $512,000 joint for 2026).
• Section 1244 stock. A loss on qualifying small business corporation stock you bought at original issue can be an ordinary loss up to $50,000 a year ($100,000 joint) instead of a capped capital loss. An IRA can't use it.

Illustration (assumptions): Two siblings each put $20,000 into the same small-business C corporation stock, and it goes to zero. Both are in the 24% bracket with no capital gains. One bought with taxable money and the stock qualifies under section 1244. The other used a self-directed IRA.

The balance: a loss is only worth something if you have gains or income to soak it up, and the $3,000 drip is slow. And the deal cuts both ways. Had that stock tripled inside a Roth, the gain would be tax-free forever. The account trades away your losses in exchange for your wins. Whether that's a good deal depends on how often you lose.

Self-directed IRAs, solo 401(k)s and ROBS: read the label

The usual "fix" is a self-directed IRA (SDIRA) that can hold real estate, private notes or private company stock. It's legal, and it isn't a loophole. It adds custodian fees (setup, annual and per-asset charges vary by custodian), annual fair-market-value reporting, non-recourse-only loans for IRA real estate, possible UBTI, and the whole-account blowup risk above. You still can't use the property, guarantee its loan, or swing the hammer.

A solo 401(k) or SEP gives a self-employed person a much bigger shelter, not a smaller one; compare them in SEP IRA vs solo 401(k). If you have business income, these accounts often weaken the "skip it" case.

Then there's ROBS, "rollovers as business start-ups," where a new C corporation's 401(k) buys the company's stock using your rolled-over savings. The IRS says ROBS arrangements aren't considered abusive tax avoidance transactions but are "questionable," and its compliance project found that most ROBS businesses either failed or were on the road to failure, with some owners losing both their retirement savings and their business. ROBS is not a hack.

The case for the boring account

Now the counterarguments, at full strength:

• The match. A 4% match on a $100,000 salary is $4,000 a year for doing nothing. Skipping it is almost never right. Check what your plan charges with a 401(k) fee audit, then take the money anyway.
• Bracket arbitrage, the FIRE engine. A traditional contribution deducted at 24% and withdrawn at 12% (or 0%) in early retirement is a large, near-certain win. Illustration: $10,000 contributed saves $2,400 now; withdrawn later at 12% it costs $1,200. That 12-point spread on every dollar is hard for most ventures to beat on a risk-adjusted basis. See Roth vs traditional.
• Creditor protection. ERISA plans are generally protected from creditors (Patterson v. Shumate, 1992). In bankruptcy, IRA contributions and earnings are protected up to $1,711,975 (adjusted April 1, 2025, under 11 U.S.C. 522(n)), with rollovers from employer plans generally not counted against that cap. Outside bankruptcy, IRA protection depends on state law. Business owners are exactly the people who get sued.
• Forced savings. Money in a taxable account has a way of becoming a boat. Lavish Larry's "opportunity fund" has funded three opportunities, all of them jet skis.
• The money isn't really locked up. Roth contributions come out anytime (Roth ordering rules). There's the Roth conversion ladder, 72(t) SEPP, the rule of 55, and other penalty exceptions. Model a ladder with the Roth conversion calculator.

Middle paths: you don't have to pick a side

• Match first, venture second. Contribute exactly enough to get the match, then send the next dollars to the venture.
• Solo 401(k) loan feature. If the plan allows loans, you can generally borrow up to 50% of your vested balance, capped at $50,000, repaid with interest, usually within five years. Miss payments and it becomes a taxable distribution. See the solo 401(k) guide.
• Roth contributions as a reserve. Contributions (not earnings) come out of a Roth IRA tax- and penalty-free anytime, so a Roth can double as an opportunity fund (ordering rules).
• The HSA. Triple tax treatment if eligible; see HSA investing strategy.
• A taxable bridge. Taxable money funds the years before 59½ (bridge accounts). Selling high-basis shares keeps reported income low, which matters because ACA premium credits are based on MAGI; see ACA MAGI management and the Roth conversion ladder.

What failure looks like

• Illiquidity. A rental or private stake can't be sold in a week. If you lose your job in a downturn, that's exactly when buyers vanish.
• Concentration. One venture is one bet. An index fund is thousands of them, and your paycheck plus your side business plus your savings in the same industry is a single point of failure.
• Survivorship bias. Forums are full of the 300% flip and empty of the garage full of unsold fidget spinners.
• Locked-in deferral. Big unrealized gains can make you hold too long, because selling hurts. Deferral is only a win if the asset keeps earning.

Calculator idea: we're planning a "Venture vs. Tax Wrapper" break-even tool: enter the expected return, years tied up and your tax rates, and it shows the return a taxable venture needs to beat a Roth or traditional index fund. It isn't built yet.

The capability test: score yourself before skipping

The real thesis isn't "retirement accounts bad." It's "know what you can actually do before defaulting." Score each line 0 (no), 1 (sort of) or 2 (yes, with receipts):

1. Repeatable edge. Can you explain why you earn above-market returns, and why it isn't luck?
2. Track record. Have you done it several times with real money, with books to prove it?
3. Time to run it. Is the venture limited by capital, not by your evenings?
4. Liquidity. Can you get the money out within a year without a fire sale?
5. Failure survivability. If it goes to zero, is your retirement still on track and the match still captured?

Score 8 to 10: the contrarian case may genuinely fit some of your unmatched dollars. 5 to 7: split the difference. 4 or less: the boring account is your friend. Non-negotiable either way: the full employer match is captured, there's an emergency fund, and nobody runs the venture through an IRA.

The verdict

Retirement accounts are excellent for passive investing and lousy for anything you actively run. The wrapper is worth roughly half a percent to one percent a year on index funds, the match is worth far more than that, and bracket arbitrage is the quiet engine of most early retirements. A proven, capital-hungry venture can beat the wrapper on paper. Most "ventures" are not that.

So: match first, then think. Keep the venture outside the account, keep the boring money inside it, and run the numbers before following either the status quo or the contrarian on the internet (hi). This is education, not advice; for decisions involving self-directed accounts or ROBS, talk to a qualified professional.