Why a taxable account belongs in the plan. Retirement accounts are powerful but constrained — annual limits, early-withdrawal penalties, required distributions. A taxable brokerage account has none of those limits. You can invest any amount, access it any time, and — critically — control when you realize taxable income. That control is why taxable accounts are the linchpin of retirement tax strategy: they let early retirees fund the years before 59½ without penalties, and they supply the low-tax dollars that make gap-year Roth conversions (Chapter 13) and bracket-filling (Chapter 20) possible.
Advantage 1 — gains are taxed only when you sell. In a taxable account, you owe nothing on an investment's growth until you actually sell it. Unrealized gains compound year after year, untaxed, entirely on your schedule. This "control over realization" is a quiet superpower: you decide which year to take a gain, letting you harvest gains in low-income years (even at 0% — below) and defer them in high ones. Held until death, the gain may never be taxed at all, thanks to the step-up (Chapter 28).
Advantage 2 — preferential long-term rates. How gains are taxed depends on how long you held the asset: - Long-term (held more than one year): taxed at preferential rates of 0%, 15%, or 20%, plus a possible 3.8% surtax at high incomes. - Short-term (held one year or less): taxed at your ordinary income rate — potentially up to 37%.
The 0% bracket is a genuine gift: in 2026 a single filer pays zero tax on long-term gains while taxable income stays under about $48,350 (roughly double for joint filers). In a low-income retirement year you can realize gains — or "tax-gain harvest," selling and immediately rebuying to reset your cost basis higher — completely tax-free. Qualified dividends get these same preferential rates. This is why a taxable account, invested tax-efficiently (broad index funds, individual long-held stocks), can be remarkably tax-light.
Treasury securities — safety plus a state-tax break. U.S. Treasuries are debt backed by the full faith and credit of the federal government — about as safe as an investment gets. They come in three maturities: bills (one year or less, sold at a discount), notes (2–10 years), and bonds (20–30 years), the latter two paying interest twice a year. A retiree-relevant perk: Treasury interest is exempt from state and local income tax (though still federally taxable), which can matter in high-tax states. Treasuries anchor the "safe" sleeve of many retirement portfolios and pair naturally with the cash-buffer approach to sequence risk (Chapter 8).
TIPS — inflation-protected Treasuries. Treasury Inflation-Protected Securities are marketable Treasuries designed to defend purchasing power. Their principal adjusts up (or down) with the CPI, and they pay a fixed coupon on that adjusted principal — so as inflation rises, both the principal and the interest payments grow. Sold in 5-, 10-, and 30-year maturities, they can be bought at TreasuryDirect or through any brokerage, and at maturity you receive the greater of the inflation-adjusted or original principal (a deflation floor). One wrinkle: the annual inflation adjustment to principal is taxable federally each year even though you don't receive it until you sell or mature ("phantom income"), which is why TIPS are often held inside tax-advantaged accounts. For a retiree worried about the retiree inflation gap (Chapters 9 and 23), TIPS are a direct hedge.
I bonds — the inflation-indexed savings bond. Series I savings bonds are a different inflation tool, aimed at smaller savers. Their rate is a composite of a fixed rate (locked for the bond's 30-year life) plus a semiannual inflation rate that resets every May 1 and November 1 based on CPI. Key rules to know: - Purchase limit: $10,000 per person per year, bought electronically at TreasuryDirect.gov (the old $5,000 paper-via-tax-refund option ended January 1, 2025). - Liquidity: locked for the first 12 months; redeeming before 5 years costs the last 3 months of interest. - Taxes: interest is federal-tax-deferred until you redeem and exempt from state and local tax (with a possible federal exclusion if used for qualified higher education).
Because of the $10,000 cap, I bonds play a supporting role — a tax-efficient, inflation-protected slice of your safe money — rather than a lead one. But for building an inflation-protected reserve over several years, they're hard to beat.
The 0% capital-gains window
In an early-retirement gap year, Dan and Lena (married, filing jointly) have $60,000 of taxable income after deductions — comfortably under the ~$96,700 top of the 0% long-term-gains bracket for joint filers. They sell appreciated index-fund shares with $30,000 of long-term gain and immediately rebuy. The gain is taxed at 0%, and their cost basis resets higher — reducing future taxable gains — all without spending a dollar in tax. That's a move only a taxable account allows.