Asset location: which investments belong in which accounts

Asset allocation decides what you own. Asset location decides where you hold it — taxable brokerage, traditional 401(k)/IRA, or Roth. It's one of the few genuinely free lunches left in investing: without changing a single fund or taking on any extra risk, placing each asset in the account that taxes it most gently can add meaningful after-tax return, year after year, for decades.

Why location matters: not all returns are taxed alike

In a taxable account, every asset leaks taxes differently. Bond interest and REIT dividends are taxed as ordinary income — up to 37% federally — every single year. Qualified stock dividends get the gentler 0/15/20% rates. Index funds barely distribute gains at all; the growth compounds untouched until you sell, and then at long-term capital gains rates. Inside a 401(k), IRA, or Roth, none of this matters: everything grows tax-free until (or beyond) withdrawal. So the question becomes: which assets waste the shelter, and which desperately need it?

The placement cheat sheet

• Taxable brokerage: total-market stock index funds and ETFs (minimal distributions), municipal bonds if you're in a high bracket, individual stocks you'll hold long-term, and anything you might need before 59½.
• Traditional 401(k)/IRA: taxable bonds and bond funds, REITs, TIPS — the ordinary-income generators. The shelter neutralizes their worst feature.
• Roth IRA/401(k): your highest-expected-growth assets — small-cap value, emerging markets, aggressive stock funds. Growth here is never taxed again, so give the shelter to whatever will grow most.
• Nowhere, ideally: actively managed high-turnover funds in taxable accounts — their annual capital gains distributions are a tax faucet you can't shut off.

The order of operations

1. Set your asset allocation first — location never overrides allocation. A worse portfolio perfectly located is still a worse portfolio.
2. View all accounts as one portfolio. Your IRA doesn't need to be balanced by itself; the household does.
3. Fill the traditional 401(k)/IRA with bonds, REITs, and TIPS first.
4. Point the Roth at the highest-growth assets.
5. Let stock index funds live in taxable — they're naturally tax-efficient, and taxable is also where tax-loss harvesting and charitable donation of appreciated shares happen.

The bottom line

Decide what to own, then be deliberate about where: ordinary-income generators (bonds, REITs) behind the traditional shelter, maximum-growth assets in the Roth, and quiet index funds in taxable. It's a one-time arrangement decision that pays a small, certain, risk-free dividend every year — the rare optimization that asks nothing of the market and everything of a spreadsheet.

A worked example: same portfolio, two arrangements

Consider $600,000 split evenly across a taxable brokerage account, a traditional 401k, and a Roth IRA, targeting 70% stocks and 30% bonds overall. Arrangement one mirrors the target in every account — each holds 70/30 — which is what most people do by default. Arrangement two locates deliberately: the taxable account holds $200,000 of total-market index funds (tax-efficient, qualified dividends, gains deferred until you sell), the 401k holds the $180,000 of bonds plus some stock funds (interest shielded from annual taxation), and the Roth holds $200,000 of stocks (the highest-expected-return asset compounding permanently tax-free). Both arrangements have identical risk and identical pre-tax returns. But for an investor in the 32% bracket, arrangement two avoids annual tax on roughly $8,000 of bond interest that would otherwise sit in taxable — about $2,600 a year saved, every year, growing with the portfolio. Vanguard and Schwab both estimate thoughtful location adds roughly 0.1 to 0.3% annually for a typical multi-account investor without changing risk at all.

Common location mistakes

• Optimizing each account instead of the whole: your allocation targets apply to the combined portfolio. Individual accounts are allowed — encouraged — to look lopsided.
• Putting REITs or high-yield bond funds in taxable because 'income feels nice there': their ordinary-income distributions make them the single best candidates for the IRA shelf.
• Wasting Roth space on bonds: the account with permanent tax-free growth should hold the assets with the highest expected growth, not the lowest.
• Letting the tax tail wag the dog: if perfect location would leave your taxable account 100% stocks but you need to spend from it in three years, liquidity needs win. Location is an optimization, not a commandment.
• Forgetting rebalancing lives here too: do your rebalancing trades inside the 401k or IRA where selling triggers no taxes, and leave the taxable account's winners untouched.

Get the big placements right once — bonds and REITs sheltered, broad stock index funds in taxable, highest-growth assets in the Roth — and the strategy maintains itself with each year's contributions.