Treasury vs Corporate vs Municipal Bonds: Which Should You Buy?
Same word — "bond" — but three very different risk, tax, and yield profiles. A side-by-side comparison with a verified taxable-equivalent yield walkthrough so you can compare all three on the same basis.
Treasury vs Corporate vs Municipal Bonds: Which Should You Buy?
All three are called "bonds," all three pay a coupon, and all three return your principal at maturity — but Treasury, corporate, and municipal bonds carry meaningfully different credit risk, tax treatment, and typical yield. Comparing them on coupon rate alone is misleading; you have to compare on an after-tax, risk-adjusted basis.
- The three bond types at a glance — issuer, credit risk, and typical yield range
- How federal, state, and local tax treatment differs across all three
- The Taxable Equivalent Yield (TEY) formula — with a verified worked example across tax brackets
- When each bond type actually makes sense for your situation
The Three Bond Types at a Glance
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| Feature | Treasury Bonds | Corporate Bonds | Municipal Bonds |
|---|---|---|---|
| Issuer | US federal government | Companies (public or private) | State, city, or local government |
| Credit risk | Effectively risk-free (backed by the federal government) | Varies widely by issuer rating, AAA to junk | Generally low historical default rates, but varies by issuer |
| Minimum typical unit | $100 | Usually $1,000 | Usually $5,000 |
| Federal tax on interest | Taxable | Taxable | Exempt |
| State/local tax on interest | Exempt | Taxable | Often exempt if issued in your home state |
| Typical liquidity | Very high — the deepest bond market in the world | High for investment-grade, lower for smaller issuers | Lower — smaller, more fragmented secondary market |
Nominal Yield Snapshot (Mid-August 2026)
Municipal bonds show the lowest nominal yield of the three — but nominal yield is not the full picture once taxes enter the comparison.
10-Yr US Treasury
Investment-Grade Corporate
Top-Rated Municipal (Nominal)
Illustrative snapshot only — always verify current-day yields before comparing bonds.
Credit Risk: Who Is Actually Backing the Bond?
Treasury bonds carry essentially no default risk — they are backed by the full faith and credit of the US federal government, which can raise taxes or print currency to meet obligations. Corporate bonds carry default risk that varies enormously by issuer, from investment-grade (BBB-/Baa3 and above) companies with a low, priced-in default probability, to high-yield ("junk") issuers where default risk is a meaningful part of the return. Municipal bonds sit in between — general obligation municipal bonds backed by a government's taxing power have historically defaulted far less often than corporate bonds of comparable rating, but revenue bonds tied to a single project (a toll road, a stadium) carry issuer-specific risk that needs individual research.
Tax Treatment — Where the Real Differences Show Up
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| Bond Type | Federal Tax | State & Local Tax |
|---|---|---|
| Treasury | Taxable as ordinary income | Exempt |
| Corporate | Taxable as ordinary income | Taxable as ordinary income |
| Municipal | Exempt | Often exempt if you live in the issuing state |
Taxable Equivalent Yield (TEY) — Comparing Apples to Apples
A 3.6% municipal yield and a 4.5% corporate yield are not directly comparable — one is tax-free, the other is not. Taxable Equivalent Yield converts a tax-free municipal yield into the pre-tax yield a taxable bond would need to match it, so you can compare on the same basis.
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| Marginal Tax Rate | Taxable Equivalent Yield |
|---|---|
| 22% | 3.6% ÷ (1 − 0.22) = 4.62% |
| 24% | 3.6% ÷ (1 − 0.24) = 4.74% |
| 32% | 3.6% ÷ (1 − 0.32) = 5.29% |
| 35% | 3.6% ÷ (1 − 0.35) = 5.54% |
| 37% | 3.6% ÷ (1 − 0.37) = 5.71% |
Municipal Taxable-Equivalent Yield Rises With Your Tax Bracket
Same 3.6% municipal bond — the higher your marginal tax rate, the more valuable the federal tax exemption becomes.
22% Bracket
24% Bracket
32% Bracket
35% Bracket
37% Bracket
At the top bracket, the same municipal bond behaves like a 5.71% taxable bond — well above the illustrative 4.5% corporate and 4.68% Treasury yields shown earlier.
When Each Bond Type Actually Makes Sense
Which Bond Type Fits Your Situation?
A starting point, not a rule — always weigh your own tax bracket, account type, and risk tolerance.
Treasury Bonds
Best for capital preservation and state-tax avoidance
- Lowest credit risk of the three
- Ideal in high-state-tax locations
- Deepest, most liquid secondary market
Corporate Bonds
Best inside tax-advantaged accounts, for higher nominal yield
- Highest nominal yield of the three at comparable maturity
- Credit research matters — ratings vary widely
- Fully taxable, so the exemption benefit is moot in an IRA/401(k)
Municipal Bonds
Best for higher tax brackets, held in taxable accounts
- Federal tax exemption is most valuable at high marginal rates
- In-state issues often add a state exemption too
- Smaller, less liquid market — factor in wider bid-ask spreads
Held inside a tax-advantaged account (401(k), IRA), the municipal tax exemption provides no benefit — Treasuries or investment-grade corporates typically make more sense there.
Practice Question
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| Problem | Answer |
|---|---|
| An investor in the 35% tax bracket is choosing between a municipal bond yielding 3.2% and a corporate bond yielding 4.6%. Which offers the better after-tax return? | TEY of the municipal = 3.2% ÷ (1 − 0.35) = 4.92%. Since 4.92% > 4.6%, the municipal bond wins on an after-tax basis — even though its nominal yield looks lower. |
Are Treasury bonds completely risk-free?
They are considered essentially free of default risk, since they are backed by the US federal government's taxing and currency-issuing power. They still carry interest rate risk — their price falls when market yields rise, just like any bond.
Why are municipal bond yields usually lower than Treasury or corporate yields?
Municipal bond interest is exempt from federal tax (and often state tax), so issuers can offer a lower nominal yield and still be attractive to investors in higher tax brackets, once compared on a taxable-equivalent basis.
What is Taxable Equivalent Yield?
It is the pre-tax yield a taxable bond would need to match a tax-exempt municipal bond's after-tax return. Formula: TEY = Tax-Exempt Yield ÷ (1 − Marginal Tax Rate).
Do municipal bonds ever default?
Yes, though historically at much lower rates than corporate bonds of comparable credit rating. General obligation bonds (backed by a government's taxing power) have historically defaulted less than revenue bonds tied to a single project.
Should I hold municipal bonds in a 401(k) or IRA?
Generally no — the tax exemption on municipal bond interest provides no extra benefit inside an already tax-advantaged account. Taxable bonds (Treasury or corporate) typically make more sense there, saving municipal bonds for taxable brokerage accounts.
Are corporate bonds riskier than Treasury bonds?
Generally yes, since corporate bonds carry issuer-specific default risk that Treasuries do not. The gap in risk varies enormously — investment-grade corporate bonds from stable companies carry modest additional risk, while high-yield ("junk") bonds carry substantially more.
What is the difference between a general obligation and a revenue municipal bond?
A general obligation bond is backed by the issuing government's taxing power. A revenue bond is backed only by the cash flow of a specific project (like a toll road or utility), which makes it riskier and more dependent on that project's performance.
Is Treasury interest really exempt from state tax?
Yes. Interest from US Treasury securities is exempt from state and local income tax nationwide, while it remains fully taxable at the federal level.
Which bond type has the most interest rate risk?
Interest rate risk depends on duration (maturity and coupon), not bond type — a 30-year Treasury and a 30-year corporate bond with similar coupons carry similar interest rate risk. See our guide on bond duration for the full explanation.
How do I calculate the yield on any of these bonds?
The YTM and current yield formulas are identical across Treasury, corporate, and municipal bonds — only the tax treatment differs. Use our Bond Yield Calculator with the bond's face value, coupon rate, price, and maturity.
Related Bond & Fixed-Income Resources
- How to Calculate Bond Yield — every yield formula (current yield, YTM, YTC, YTW, holding period yield) with verified worked examples.
- Bond Yield Calculator: A Complete Guide to YTM & Absolute Returns — a deeper dive into YTM math and absolute returns.
- Bond Duration & Interest Rate Risk Explained — how to compare interest rate risk across bonds regardless of issuer type.
- Bond Funds vs Individual Bonds — how to hold a diversified mix of these bond types without picking each one yourself.
- Bond Yield Calculator — calculate YTM, current yield, and duration for any bond.
- Dividend Calculator — compare fixed-income yield against equity dividend income.
Written by
Do The Calculation Team
Do The Calculation Editorial Board
The Do The Calculation Editorial Board is comprised of software engineers, finance analysts, and technical contributors focused on building clean, accurate, and easy-to-use calculator tools.
Reviewed & Verified By
Dr. Elizabeth Vance, PhD
Senior Editorial Board Member (Finance)
Former investment bank strategist and university lecturer with 15+ years of research in compound growth modeling, asset allocation, and annuity projections. Dr. Vance reviews all core investment and retirement tools to ensure absolute alignment with actuarial standards.