The four retirement vehicles, in plain words
Retirement planning has a vocabulary problem: the words are acronyms, the explanations are sales pitches, and the stakes are your entire future income. This letter lays out the four main vehicles in plain language — what each is, how the tax treatment differs, and the filling order that fits most professional situations.
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The four vehicles, and what each one IS
| Vehicle | What it is | The tax treatment |
|---|---|---|
| 401(k) | Your employer's retirement plan | Traditional: pre-tax dollars in, taxed coming out. Roth 401(k) option (if offered): taxed going in, tax-free coming out |
| IRA | An individual account you open yourself | Same two treatments — traditional or Roth — with lower contribution limits |
| Roth IRA | The IRA's after-tax flavor | Contributions taxed now; qualified withdrawals in retirement are entirely tax-free |
| HSA | A health savings account (high-deductible health plan required) | Triple-advantaged: deductible in, tax-free growth, tax-free out FOR QUALIFIED MEDICAL — the only vehicle with three favorable treatments |
The difference between traditional and Roth is not which is 'better' — it's a bet on your tax rate: traditional bets you'll pay LESS in retirement than now; Roth bets you'll pay MORE. Both can win; the honest answer depends on income now vs. expected income later.
The filling order (for most professional situations)
- Employer match to the maximum — an instant 50–100% return on those dollars, before any market exposure.
- HSA to its annual limit (if eligible) — the triple treatment, and medical costs are a certainty of retirement.
- 401(k) up to the full employee limit — the biggest contribution door available.
- Roth IRA or backdoor Roth (if income allows) — tax diversification: some money that will never be taxed again.
- Taxable brokerage — no special treatment, total flexibility, no limits.
The order is a strong default, not a prescription — it bends for employer stock plans, state tax quirks, and your cash reserve needs. The point of a default is that you START, and adjust with a professional when your situation stops being typical.
The two questions people actually ask
- 'How much is enough?' There is no universal number — the honest method works backward from your expected spending in retirement, which only you can estimate. The mechanics: expected annual spending × ~25 is one common starting point for the total, adjusted for what Social Security will cover. Treat every multiplier you read online as a starting point for a conversation, not a verdict.
- 'What do I invest it in?' Inside the vehicles, the boring answer dominates: diversified, low-cost funds — the same Level of restraint our investing letters always teach. The vehicle (the tax wrapper) and the investment (what's inside it) are SEPARATE decisions; don't let a salesperson merge them.
Retirement planning is not a product you buy. It's a sequence of small, boring, automatic decisions — the sooner automatic, the better.
The Quiet Money Review, letter one
Frequently asked questions
What happens if I withdraw early?
Generally a 10% penalty plus income tax on pre-tax money — with real exceptions worth knowing (certain medical, first-home purchase for IRAs, the 'rule of 55' for some 401(k)s). The penalty exists because the tax treatment is the deal: patience is what you're being paid for.
Is the backdoor Roth legal?
Yes — it's a documented contribution method (non-deductible traditional IRA contribution, then conversion), not a loophole. It has real mechanics (the pro-rata rule) that matter if you hold other IRA balances — this is exactly where a professional earns their fee.
My employer offers both traditional and Roth 401(k) — split it?
Splitting is legitimate tax diversification. A common approach: traditional in your peak earning years, Roth in the early and late years. The split depends entirely on your income trajectory — which makes it a perfect once-a-year question for a tax professional.