Tax Efficiency of Assets

The guiding principle of asset location is to maximize the value of tax deferral by placing highly taxed assets in tax-deferred accounts. Investments that are less tax-efficient, which generate income taxed at higher ordinary rates or produce significant taxable events, should be placed in tax-advantaged accounts to defer or eliminate their tax impact.

The tax treatment of interest, dividends, and capital gains differs significantly. Interest from bonds and dividends from firms are taxed in the year they are received. In contrast, capital gains—increases in the value of stocks or bonds—are not taxed immediately. Taxation on capital gains is deferred until the asset is sold and the gain is realized.

This deferral acts like an interest-free loan from the government on the amount of the capital gains tax due. If an asset appreciates and is held for many years before being sold, the value of this “loan” can be substantial. Consequently, the present discounted value of the tax payment, when the asset is eventually sold, may be much lower than its nominal value, effectively reducing the tax rate below the statutory rate.

The effective tax rate on unrealized capital gains drops to zero at death under the basis step-up rule (section “Capital Gains Resets With Inheritance”). Under IRC §1014, an inherited asset receives a fresh basis equal to fair market value at the decedent’s death, permanently eliminating accumulated capital gains tax.

The list of asset types, ranked by tax efficiency, is as follows:

Efficient

Suitable for taxable accounts:

1.

Tax-exempt municipal bonds ( IRC §103, “Interest on State and local bonds”; beware the AMT preference on private-activity bonds and the Social Security benefit-taxation impact)

2.

Low-yield money market, cash, short-term bond funds

3.

Tax-managed stock funds and direct-indexed separate accounts (section “The Structural Obsolescence of Mutual Funds in Taxable Accounts”)

4.

Large-cap and total-market stock index funds

5.

Balanced index funds

6.

Small-cap or mid-cap index funds

7.

Value index funds

Moderately inefficient

Prefer in tax-free, but can go into taxable:

8.

Moderate-yield money market, bond funds

9.

Total-market bond funds

10.

Active stock funds

Highly inefficient

Place in tax-free or tax-deferred:

11.

Real estate or REIT funds

12.

High-turnover active funds

13.

High-yield corporate bonds

Bonds Taxable bonds are typically held in tax-deferred accounts such as traditional IRAs or 401(k)s because the interest from these bonds is taxed as ordinary income, which is often at a higher rate than the taxes on dividends and capital gains from stocks. By placing taxable bonds in these accounts, you can defer taxes until withdrawal, potentially benefiting from a lower tax rate at that time.

The exception is low-yielding bonds: with little interest to tax, the cost of holding them in a taxable account is correspondingly small, and the scarce tax-advantaged space may be better spent sheltering a higher-yielding asset instead. High-dividend stock funds sit in the same gray zone, softened by the favorable rate on qualified dividends.

Treasury bonds are exempt from state and local income taxes. This makes them an attractive option for investors facing high state income tax rates. Similarly, TIPS are exempt from state tax, but investors must pay federal tax annually on the inflation accretion to principal — treated as original issue discount under Treas. Reg. §1.1275-7, “Inflation-indexed debt instruments” — which is not distributed until maturity or sale. That phantom income makes a tax-advantaged account the natural home for individual TIPS. A TIPS fund distributes the adjustment as cash, which solves the cash-flow problem but preserves ordinary-income taxation.

Municipal bond funds, while exempt from federal taxes on interest income, typically yield less than corporate or treasury bond funds of comparable risk; whether the exemption is worth the lower coupon is a taxable-equivalent-yield question your bracket settles (section “Municipal Bonds”). This is due to the different types of risks they carry; for example, intermediate-term municipal bonds generally have higher credit risk but lower interest rate risk compared to long-term treasury bonds, potentially leading to similar after-tax yields. Interest from private-activity municipal bonds is a preference item for the Alternative Minimum Tax (AMT) under IRC §57(a)(5) (section “Alternative Minimum Tax (AMT) and Private Activity Bonds”), and all tax-exempt interest enters the provisional-income formula of IRC §86(b)(2)(B) that exposes Social Security benefits to taxation — and the MAGI that sets IRMAA surcharges.

Mutual Funds and ETFs Balanced funds, which include both stocks and bonds, are popular among individual investors for their simplicity and diversification. Balanced and target-date funds exhibit intermediate tax efficiency, as automated rebalancing inside the fund triggers periodic capital gains.

Stock funds can be tax-inefficient, especially if they generate substantial capital gains, particularly short-term ones. High dividend payouts can also reduce tax efficiency, though the impact is lessened if most dividends qualify for reduced tax rates under current law. Actively managed stock funds with high turnover rates tend to generate significant taxable gains due to frequent selling. In contrast, low-turnover index funds rarely distribute capital gains, making them ideal for taxable accounts. Investing in broad-market index funds or ETFs minimizes tax friction compared to actively managed funds.

Index funds, which track specific indices, must sell stocks that are removed from the index. This can lead to realized capital gains, especially in small-cap and value indices, which are more likely to include stocks that transition to large-cap or growth indices as their prices increase. Tax-managed funds, ETFs, and funds with an ETF class can mitigate many of these gains. Value index funds carry higher dividend tax drag due to larger yields, while small-cap funds distribute fewer dividends but more non-qualified distributions. See Table 11.2 “Comparison Of Mutual Fund’s Tax Efficiency” for examples.

International Funds International funds may have a slight tax advantage over U.S. funds due to eligibility for the foreign tax credit. However, this advantage can be offset by factors such as the reclassification of markets; for example, if an emerging market is reclassified as developed, an index fund may need to sell all its holdings in that country, potentially triggering large capital gains.

REITs, which trade like stocks, must distribute at least 90% of their taxable income to shareholders ( IRC §857(a)(1), “Taxation of real estate investment trusts and their beneficiaries”). Most of that arrives as ordinary dividends, taxed at your marginal rate instead of the qualified rate — partly offset by the IRC §199A, “Qualified business income” deduction. A portion (historically around 15%) is return of capital thrown off by depreciation. That portion is tax-deferred, not tax-free: it reduces your basis, so it comes back as additional capital gain when you sell, and once basis reaches zero further distributions are taxed immediately. Full treatment in section “REITs”.

Where you hold different types of investments—taxable or tax-advantaged accounts—should depend on expected return, tax implications, and each investment type’s specific tax advantages or disadvantages.