Chapter 6: Asset location: same portfolio, lower taxes
Two households own the identical $600,000 portfolio: the same stock index fund, the same bond fund, the same returns for twenty years. One ends up about $88,000 richer after tax. The entire difference is which fund sat in which account. That decision is asset location: choosing which investments live in your taxable account, which in your traditional 401(k) or IRA, and which in your Roth. It costs nothing, takes an hour at rebalance time, and this chapter does the arithmetic that proves the $88,000.
First, the order of operations. The Personal Finance Guide builds the portfolio itself: your stock and bond mix drives most of your outcome, and that mix is chosen for risk, never for taxes. Location comes second, and it never overrides allocation. If shelving an asset tax-efficiently would change how much risk you hold, you have the steps reversed.
What each shelf actually taxes
Think of your accounts as three shelves with three different tax climates.
Taxed as you go, gently at the end
Dividends and interest are taxed every year whether you spend them or not. Sales are taxed on the gain, at long-term rates if you held more than a year. In exchange, this shelf has privileges the others lack: the 0/15/20 rates, tax-loss harvesting (Chapter 5), the step-up at death, and gifts of appreciated shares to charity (Chapter 12).
Nothing now, ordinary rates later
No tax on dividends, interest, or trades inside the account; the deferral lets everything compound untouched. Every dollar withdrawn is taxed as ordinary income, and required minimum distributions eventually force withdrawals. This shelf converts all returns, even stock gains, into future ordinary income.
Nothing now, nothing later
No tax inside, no tax out, no required distributions for the original owner. The most valuable shelf per dollar, which is exactly why the contribution doors are narrow (Chapters 7 and 8).
The insight that makes location work: investments differ in how much annual tax noise they produce. A taxable bond fund pays interest every month, taxed at ordinary rates. A REIT fund pays mostly non-qualified dividends, same problem. An actively traded fund distributes capital gains every December. A broad stock index fund is nearly silent: a modest qualified dividend taxed at 15% for most people, and almost nothing else until you sell, decades from now, at long-term rates or never. Loud assets belong behind the soundproof walls of tax-deferred accounts. Quiet assets can live in the open.
The placement table
| Holding | Best shelf | Why |
|---|---|---|
| Taxable bond funds, CDs, TIPS | Traditional 401(k) / IRA | Interest is ordinary income every single year; sheltering it stops the bleed |
| REIT funds | Traditional 401(k) / IRA | Dividends are mostly non-qualified, taxed at full rates |
| Active funds with high turnover | Traditional or Roth | They distribute taxable gains annually whether you trade or not |
| Broad stock index funds and ETFs | Taxable | Quiet qualified dividends, deferred gains, harvesting access, step-up |
| Municipal bonds | Taxable, high brackets only | Already federal tax-free; sheltering them wastes the exemption |
| Highest-expected-growth assets | Roth | The biggest compounding escapes tax entirely, with no RMDs |
Two notes on the table. The Roth row is a tilt, not a license: you fill the Roth with the highest-growth slice of the allocation you already chose, never with extra risk invented to "maximize" the account. And the municipal bond row deserves its own section, because munis are the one asset people routinely shelve backwards.
Munis: when a lower yield wins
Municipal bonds pay interest that is free of federal tax, and the market prices that privilege in: munis yield less than comparable taxable bonds. Whether the trade is worth it depends entirely on your marginal rate, and the comparison takes one line of arithmetic. The taxable-equivalent yield of a muni is the muni's yield divided by one minus your marginal rate. If that number beats what taxable bonds actually pay, the muni wins.
Take a muni fund yielding 3.5% against a taxable bond fund yielding 4.6%. For a filer in the 24% bracket, divide 3.5% by 0.76 to get a taxable-equivalent of 4.61%, a photo finish with 4.6%: at this bracket the muni is a coin flip at best, and below it, a clear loss. Jamie, at a 22% marginal rate, would be swapping a 4.6% yield for the equivalent of 4.49%, paying for a tax shield bigger than the tax.
Maya's wage income is taxed at 35%, and her investment income also carries the 3.8% NIIT, so interest reaching her taxable account loses 38.8 cents on the dollar. Muni interest is exempt from both. Dividing 3.5% by 0.612 gives a taxable-equivalent yield of 5.72%, far past the 4.6% the taxable fund pays. For bonds Maya insists on holding in her taxable account, munis win comfortably. Her cheaper move is still the placement table: her 401(k) holds taxable bonds at the full 4.6% with no tax at all until withdrawal.
The decision rule falls out of the arithmetic: munis earn their keep in roughly the 32% bracket and above, especially with NIIT stacked on top, and only in taxable accounts. Holding a muni fund inside an IRA converts tax-free interest into withdrawals taxed at full rates, the worst of both worlds.
The $600,000 proof
Now the headline number, with every assumption on the table. A couple holds $600,000, split evenly: $300,000 in a total-market stock index fund and $300,000 in a taxable bond fund. Their money is also split evenly between shelves: $300,000 in a taxable brokerage and $300,000 in a traditional 401(k). Assume stocks return 7% a year (a 2% qualified dividend plus 5% price growth), bonds yield 4.5%, the couple sits in the 24% bracket with 15% rates on qualified dividends and long-term gains, everything is reinvested, and after 20 years the 401(k) is withdrawn at 24% and the taxable account is liquidated at 15%.
The annual drag tells you who is bleeding. Bonds in taxable lose 24% of a 4.5% yield, a drag of 1.08% a year, $3,240 on day one. Stocks in taxable lose 15% of a 2% dividend, a drag of 0.30%, $900. Swapping shelves moves $2,340 of year-one drag, and the gap compounds.
Arrangement A puts bonds in taxable and stocks in the 401(k). The bonds compound at 4.5% minus the annual tax bite, 3.42% after tax, growing to $587,800 with no embedded gain. The stocks compound untouched at 7% to $1,160,900, but every dollar exits at ordinary rates: after 24%, $882,300. Total after tax: $1,470,100.
Arrangement B puts stocks in taxable and bonds in the 401(k). The stocks compound at 6.7% after the small dividend tax, reaching $1,097,500. Their basis is the original $300,000 plus about $202,400 of reinvested after-tax dividends, so liquidating means 15% tax on a $595,100 gain: $89,300, leaving $1,008,200. The bonds compound untaxed at 4.5% to $723,500, worth $549,900 after the 24% withdrawal. Total after tax: $1,558,100.
| After 20 years, after all taxes | A: bonds in taxable | B: stocks in taxable |
|---|---|---|
| Taxable account | $587,800 | $1,008,200 |
| Traditional 401(k) | $882,300 | $549,900 |
| Total | $1,470,100 | $1,558,100 |
Same funds, same returns, same risk on every day of the twenty years, and arrangement B finishes $88,000 ahead. Two engines drive the gap: the bond interest stops being taxed annually at 24%, and the stock growth escapes the 401(k), where it was being converted from 15% gains into 24% ordinary income. And B's edge is understated, because those taxable-account stocks also carry the Chapter 5 toolkit: harvest a loss in the next bear market, donate appreciated shares, or hold them to the step-up, in which case the $89,300 liquidation tax vanishes and the gap widens toward $177,300.
One honesty note: the size of the prize scales with bond yields and your bracket. At 2% bond yields the gap shrinks; at 5.5% and a 32% bracket it grows. The direction of the advice survives every reasonable assumption, which is what makes it a default rather than a forecast.
A rebalance-day decision, not a daily one
Location is the rare strategy with no urgency. The gap above accumulates over decades, so implement it on the day you already rebalance, and never pay a big tax bill to get there. Selling appreciated stock in taxable to "fix" placement can burn more in realized gains than years of drag savings. The patient route uses free moves: trades inside the 401(k) and IRA cost nothing in tax, so do most of the rearranging there, and point new contributions and dividends at the right shelf in taxable. Most portfolios can be fully located within a year or two without realizing a dollar of gain.
Choose your allocation first, for risk, with no tax input. Then, at rebalance time, shelve it: bonds and REITs in traditional accounts, broad index funds in taxable, the highest-growth slice in the Roth, and munis only in taxable and only above roughly the 32% bracket. Relocate with tax-free trades and new money, never by realizing big gains.
Where people go wrong
- Holding bond funds in taxable while a 401(k) holds index funds. The exact arrangement A above, common because it happens by default, one account at a time.
- Buying munis in a 22% or 24% bracket. Divide the yield by one minus your rate before believing the tax-free label; at 24%, a 3.5% muni merely ties a 4.6% taxable bond.
- Holding munis inside an IRA. The exemption is wasted and the interest comes out taxed at full ordinary rates.
- Selling appreciated taxable holdings just to relocate. A realized 15% gains bill today can outweigh a 0.78% annual drag for a decade; relocate with sheltered trades and new money.
- Letting the Roth tail wag the risk dog. Putting speculative assets in the Roth because losses there hurt most of all: the shelf never justifies the bet.
Key takeaways
- Allocation first, for risk; location second, for taxes. Same portfolio, different shelves, real money.
- Loud assets (bond interest, REIT dividends, active fund distributions) belong in tax-deferred accounts; quiet broad index funds belong in taxable; the highest-growth slice belongs in the Roth.
- A muni's taxable-equivalent yield is its yield divided by one minus your marginal rate: a 3.5% muni equals 4.61% at the 24% bracket and 5.72% for Maya at 38.8%, so munis are a high-bracket, taxable-account tool.
- The $600,000 worked example finishes $1,558,100 versus $1,470,100 after 20 years, an $88,000 gap from shelving alone, larger still if the stocks ride to the step-up.
- Implement at rebalance time with tax-free trades and new contributions; never realize large gains to relocate.
Sources: IRS: Publication 550, Investment Income · IRS: Publication 590-B · IRS: 2026 Tax Inflation Adjustments · Finvest Personal Finance Guide