Asset Location: Which Accounts Hold Which Investments

Asset allocation is what you own. Asset location is which account each asset lives in. For a household with taxable, tax-deferred, and Roth accounts, getting location right is worth 0.25% to 0.75% of additional annual return — for free, with no extra risk.

The principle

Three account types tax investment returns three different ways:

• Taxable brokerage: dividends and interest taxed annually; capital gains taxed when realized, with qualified dividends and long-term gains at preferential rates (0/15/20%) under IRC §1(h).
• Tax-deferred (Traditional 401(k) or IRA): no annual tax; all withdrawals taxed as ordinary income.
• Tax-free (Roth): no tax on growth or qualified withdrawals.

The asset-location rule follows from the tax treatment: put the most tax-inefficient assets in the most tax-protected accounts, and the most tax-efficient assets in taxable.

The hierarchy

Why bonds belong in tax-deferred

Bond interest is taxed at ordinary income rates with no preferential treatment. A 5% Treasury yield held in a taxable account by a 37%-bracket investor becomes 3.15% after federal tax. Held inside a Traditional 401(k) the full 5% compounds, taxed only on withdrawal. Roth is technically even better — but Roth space is more valuable than tax-deferred space because Roth is permanently tax-free; using it on a 5% bond rather than a 10% equity wastes the shelter.

Why high-growth equities belong in Roth

Roth withdrawals after age 59½ and the five-year clock are tax-free under IRC §408A(d)(2). The IRS will never collect a dollar of tax on a Roth account again. The best use of a permanent tax shelter is the asset with the highest expected long-term return — typically equities, especially the higher-volatility, higher-expected-return subset.

Where the rule bends

• Direct indexing in taxable. A taxable account with separately-held stocks lets you harvest losses individually, generating $3,000+ of annual ordinary-income offset under IRC §1211 — a small ongoing benefit that argues for keeping some equity in taxable even if Roth space is available.
• Step-up in basis on death. Appreciated taxable assets get a basis reset under IRC §1014 when an heir inherits — the entire embedded gain disappears. For older investors with estate-planning intent, holding low-basis equities in taxable can be more tax-efficient than the location-only analysis suggests.
• State tax on bond interest. U.S. Treasuries are exempt from state income tax even when held in a taxable account. For a California investor in the 13.3% bracket, that exemption can outweigh the federal-deferral advantage of a 401(k).

Common mistakes

• Identical 60/40 in every account. The household ends up paying ordinary-income tax on bond interest in taxable and forgoing tax-free equity growth in Roth. Coordinate across accounts, not within each one.
• Holding municipal bonds in a Roth. Munis pay federally tax-exempt interest already; placing them inside a Roth wastes both shelters.
• Holding REITs in taxable. REIT dividends are generally not qualified and are taxed at ordinary rates with a 20% §199A deduction (made permanent by OBBBA). Tax-deferred is the natural home.

Sources

• Internal Revenue Code §1(h), preferential rates on long-term capital gains and qualified dividends: law.cornell.edu/uscode/text/26/1
• Internal Revenue Code §1014, basis of property acquired from a decedent: law.cornell.edu/uscode/text/26/1014
• Internal Revenue Code §408A, Roth IRAs: law.cornell.edu/uscode/text/26/408A
• Internal Revenue Code §199A, qualified business income deduction (REIT dividends): law.cornell.edu/uscode/text/26/199A
• Vanguard Research, "Tax-Efficient Equity Investing: Solutions for Maximizing After-Tax Returns" (2023): corporate.vanguard.com (Vanguard Research)
• William Reichenstein and William Meyer, "Asset Location Decisions Revisited," Journal of Financial Planning (2013).

RetirementCheck101's worksheet captures your account types so we can recommend location, not just allocation. Explore the free educational tool.