BND Is Cheap and Diversified. In a Taxable Account, Retirees Still Do Better With VTEB

Fees matter everywhere, but I think they’re particularly important in fixed income. Stocks have historically offered enough return that a few extra basis points may occasionally get lost in the noise. Bonds generally have much lower expected returns, meaning every dollar lost to management fees consumes a larger percentage of what the investment actually earns.

That’s one reason I’ve always liked the Vanguard Total Bond Market ETF (BND). Its 0.03% expense ratio creates almost no meaningful fee drag, while one ETF gives you exposure to more than 11,000 investment-grade bonds spanning U.S. Treasuries, agency mortgage-backed securities, and corporate debt across short, intermediate, and longer maturities.

But management fees aren’t the only drag for investors. Put BND inside a taxable brokerage account and taxes can consume considerably more of your return than its 0.03% expense ratio ever will. For retirees who hold a meaningful fixed-income allocation outside their IRA or other tax-advantaged accounts, that’s why I’d also consider the Vanguard Tax-Exempt Bond ETF (VTEB).

What Makes Municipal Bonds Different

VTEB invests broadly across the U.S. investment-grade municipal bond market. These securities finance everything from state and local government spending to schools, transportation systems, hospitals, utilities, and other public infrastructure.

Municipal debt generally comes in two forms. General obligation bonds rely primarily on the taxing authority of the issuing government. Revenue bonds depend instead on revenue generated by a particular facility, project, or other dedicated source.

The main advantage for a taxable investor is straightforward: interest from qualifying municipal bonds is generally exempt from federal income tax. Compare that with BND. Interest generated by its corporate bonds is generally federally taxable as ordinary income and potentially subject to state taxes as well. Treasury interest avoids state and local income taxes but remains federally taxable. Mortgage-backed securities can generate taxable income too.

Now, municipal bonds aren’t universally tax free. Certain private activity bonds can be subject to the alternative minimum tax, and selling muni bonds or ETF shares at a gain can still create capital gains taxes. A national municipal ETF also generally doesn’t provide the same state income-tax exemption that a qualifying single-state municipal fund can provide to residents of that state.

Credit quality is another important consideration. Municipal issuers can default, but broad investment-grade muni portfolios tend to hold predominantly high-quality debt. You’re therefore not necessarily accepting junk-bond-level credit risk simply to obtain the federal tax exemption.

VTEB Shows How Much Taxes Can Matter

VTEB makes the cost comparison particularly interesting because Vanguard isn’t charging investors extra for the tax efficiency. The ETF has the same 0.03% expense ratio as BND. It currently offers a 3.97% 30-day SEC yield, with qualifying municipal interest generally exempt from federal income taxes.

Vanguard’s own after-tax performance figures help illustrate why that matters. Over the trailing one-year period, VTEB returned 6.70% before taxes. After accounting for taxes on distributions and the sale of fund shares, that return fell to approximately 5.40%. Now compare that with BND. Its corresponding one-year return was 3.69% before taxes and just 2.17% after accounting for taxes on distributions and shares sold.

I wouldn’t interpret that comparison as evidence that VTEB will always outperform BND. They’re different bond portfolios, and one year is far too short to establish which will generate higher future returns. Changes in Treasury yields, municipal spreads, credit conditions, and duration can easily change the relative performance. What the numbers do demonstrate is how differently taxes can affect the returns that ultimately reach an investor.

BND’s 0.03% expense ratio is about as cheap as investing gets. Yet for a retiree holding the ETF in a taxable brokerage account, the tax drag can dwarf the management fee. VTEB tackles that problem without requiring investors to pay a higher expense ratio. You still get a diversified investment-grade bond portfolio at 0.03% annually, but qualifying interest receives the federal municipal tax exemption.

Inside an IRA, I’d be much less concerned about this distinction because the account already provides tax advantages. In a taxable brokerage account, however, I think retirees should evaluate fixed income based on after-tax return rather than expense ratios and headline yields alone.

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