The Math That Most Investors Miss
When investors compare bond yields, they almost always make the same mistake: they compare nominal yields. A corporate bond yielding 5.15% looks better than a municipal bond yielding 4.00%. Simple, right?
Wrong. The comparison is meaningless without adjusting for taxes. And when you run the actual math, municipal bonds are not just competitive — they are often the clear winner for investors in the 32% federal tax bracket and above.
The concept is straightforward but powerful: the taxable equivalent yield (TEY). This is the yield a taxable bond would need to offer to match the after-tax income of a tax-exempt municipal bond. The formula is simple:
Taxable Equivalent Yield = Tax-Free Yield ÷ (1 – Your Tax Rate)
For an investor in the top federal bracket (37%) plus the 3.8% Net Investment Income Tax — a combined rate of 40.8% — the numbers are eye-opening. A municipal bond yielding 4.36% tax-free translates to a taxable equivalent yield of 7.37%. Add state tax exemption for in-state bonds and the advantage widens further. For a California or New York investor facing a combined federal and state rate north of 50%, a 4.36% muni effectively delivers the equivalent of an 8.7% taxable yield.
That is not a rounding error. That is a structural advantage that most investors fail to exploit.
Where Yields Stand Today
The current yield environment for municipal bonds is the most attractive it has been in over a decade. A portfolio of A-rated or better municipal bonds in the 20-to-30-year maturity range can produce a federal tax-free yield to worst of approximately 4.36%, which equates to a taxable equivalent yield of roughly 7.37% for investors in the top bracket. If callable bonds are held to maturity rather than called, the yield to maturity increases to approximately 4.71% — a taxable equivalent of nearly 8.00%.
To put this in concrete terms: an investor deploying $1 million in par value into a diversified municipal bond portfolio can generate approximately $43,600 to $47,100 in annual tax-free income. A taxable bond would need to produce $73,700 to $79,500 in pre-tax income to deliver the same after-tax result. That spread — roughly $30,000 per million in phantom yield — is the tax-free edge.
This advantage extends across the yield curve. Short-term munis in the one-to-three-year range offer attractive yields with minimal duration risk, while the long end of the curve is especially steep, with 20-to-30-year maturities offering an additional 70 basis points over 10-to-20-year bonds without dramatically increasing volatility.
The Supply Constraint That Nobody Is Talking About
The supply picture for municipal bonds is more nuanced — and more bullish for investors — than headline numbers suggest.
Yes, 2025 was a record year for municipal bond issuance, surpassing $500 billion as borrowers rushed to market amid fears that the tax-exempt status of munis could be curtailed under the One Big Beautiful Bill Act. That legislative threat has now largely passed — the final bill, signed into law on July 4, 2025, preserved the federal tax exemption for all municipal bonds, including qualified private activity bonds. It even expanded the tax code to authorize tax-exempt bonds for new categories like spaceport facilities.
But here is the critical dynamic most investors are missing: while gross issuance was elevated, much of it was refinancing activity, not new money. Net new supply — the amount of bonds actually added to the market after accounting for maturities, calls, and redemptions — has been far more constrained. And looking ahead, several forces are likely to tighten supply further.
First, the legislative scare itself pulled forward issuance. Many municipalities that would have issued in 2026 or 2027 rushed to market in 2025 as a precautionary measure. That front-loaded supply now creates a relative scarcity going forward.
Second, rising construction and infrastructure costs mean municipalities need to borrow more per project, but political resistance to new debt issuance — particularly in states where the SALT deduction cap made taxpayers more sensitive to local tax burdens — constrains the ability to issue. The OBBBA increased the SALT cap from $10,000 to $40,000, which may ease some of that political resistance over time, but the shift will not happen overnight.
Third, and perhaps most importantly, there is nearly $8 trillion sitting in money market funds, waiting for redeployment as the Fed continues to ease and cash rates decline. As those dollars seek higher-yielding, tax-advantaged alternatives, municipal bonds are likely to be among the top destinations. Inflows into municipal bond funds already surged to $50 billion in 2025. We expect that trend to accelerate as short-term rates fall and investors are forced out of cash.
The implication is clear: strong and growing demand meeting constrained net supply. That is a recipe for tighter spreads, higher prices, and total returns that could meaningfully outpace expectations.
Credit Quality: Stronger Than You Think
One of the enduring advantages of the municipal bond market is credit quality. Historical default rates for investment-grade munis hover around 0.5% — a fraction of comparably rated corporate bonds. States entered fiscal year 2026 in solid financial position, with rainy-day fund reserves reaching $183 billion at the end of fiscal 2024, matching an all-time high. Tax revenue growth, while normalizing from the surge of 2021–2022, remains on its longer-term trajectory.
This credit strength matters because it means investors can earn taxable equivalent yields north of 7% without taking on meaningful credit risk. In the corporate bond market, achieving similar yields requires moving down the credit spectrum into BBB or high-yield territory — where default risk is materially higher and spread volatility can erode returns.
The Income Opportunity: How We Are Positioning
At Keel Wealth Management, we believe the current municipal bond market presents one of the most compelling income opportunities in a generation. The combination of elevated nominal yields, structural tax advantages, constrained net supply, and strong credit fundamentals creates a rare alignment of factors that favors municipal bond investors.
Our approach emphasizes several key principles:
A barbell maturity structure: We pair short-term positions in the one-to-three-year range — where yields are attractive and reinvestment flexibility is preserved — with longer-dated bonds in the 20-to-30-year range where the yield curve is steepest and roll-down return potential is greatest.
Credit quality discipline: We focus the bulk of municipal bond portfolios on A-rated or better issuers. The incremental yield from reaching into lower-rated territory does not justify the risk for most investors. Where we do extend down the credit spectrum, it is in sectors with strong structural protections — essential-service revenue bonds, pre-paid natural gas bonds backed by money-center banks, and housing-related credits where supply shortages support fundamentals.
State tax optimization: For clients in high-tax states, in-state municipal bonds offer double or triple tax exemption. A Texas investor already avoids state income tax, but clients with exposure to California, New York, or New Jersey can capture significant additional yield advantage through careful state-level allocation.
Individual bonds over funds: We generally prefer building portfolios of individual municipal bonds rather than using bond funds. Individual bonds provide certainty of maturity, predictable cash flows, and the ability to hold to maturity without being subject to the forced selling that fund managers face during redemption cycles. This is particularly important in volatile rate environments where bond fund NAVs can swing based on flows rather than fundamentals.
The Bottom Line
The municipal bond market in 2026 offers something rare: high income with low risk, amplified by a tax advantage that most investors underestimate. A well-constructed municipal bond portfolio can deliver taxable equivalent yields of 7–8% for high-bracket investors, backed by credit quality that is among the strongest in all of fixed income.
The window may not stay open forever. As $8 trillion in money market cash begins to migrate into the bond market, demand will compress yields and tighten spreads. Investors who position now — while yields are elevated and supply dynamics remain favorable — will lock in income streams that may look exceptionally attractive in hindsight.
Tax-free income is not exciting. It does not make headlines. But for investors focused on building durable, after-tax wealth, it may be the single most powerful tool available today.
Keel Wealth Management, LLC is a Registered Investment Advisor based in Austin, Texas. This article is for informational purposes only and does not constitute investment advice. Municipal bonds are subject to credit risk, interest rate risk, and liquidity risk. Consult your tax advisor regarding your individual tax situation. Contact Scott Zodin at scott@keelwealth.com to learn more about our municipal bond strategy.
