Compare municipal bond yields to taxable bond yields on an after-tax basis. Enter your federal and state tax rates along with the municipal bond yield to see the taxable-equivalent yield you would need to earn to match the tax-free income from a muni bond.
Municipal bonds ("munis") are debt securities issued by U.S. state and local governments, school districts, and certain public authorities. Their defining feature: interest income is exempt from federal income tax, and often from state and local tax for in-state bonds. This tax exemption gives munis lower nominal yields than comparable taxable bonds — but for investors in high tax brackets, the after-tax yield can be substantially higher than taxable alternatives.
The "tax-equivalent yield" framework is the key concept. A 3.5% muni for a high-bracket investor in California (24% federal + 9.3% state = 33.3% combined) has a tax-equivalent yield of 3.5% / (1 − 0.333) = 5.25%. That means a taxable bond would need to yield 5.25% to provide the same after-tax income. Current Treasury yields (around 4-5%) often look attractive nominally but become less competitive after tax for high-bracket investors.
This calculator computes the tax-equivalent yield of a municipal bond given your tax brackets, allowing direct comparison to taxable alternatives. Use it for: deciding between Treasury bonds and munis, evaluating muni offerings in your specific tax situation, and planning income generation in retirement when tax bracket may shift. Munis are particularly valuable for high-bracket investors in high-tax states who hold significant fixed income in taxable accounts.
California resident, 35% federal + 9.3% state = 44.3% combined. Comparing 3.5% in-state muni vs. 5% taxable corporate. Muni TEY: 3.5% / (1 − 0.443) = 6.29% Taxable after-tax: 5% × (1 − 0.443) = 2.79% Muni wins by a large margin. The combination of high federal bracket and high state tax makes in-state CA munis dramatically more attractive than taxable alternatives.
Texas resident, 24% federal + 0% state = 24% combined. Comparing 3.5% muni vs. 4.5% Treasury. Muni TEY: 3.5% / (1 − 0.24) = 4.61% Treasury after-tax: 4.5% × (1 − 0.24) = 3.42% Muni still wins (4.61% TEY > 4.5% Treasury yield), but the margin is much smaller than for the CA investor. For Texas residents at moderate brackets, the muni advantage is modest. Worth considering but less critical.
12% federal bracket, no state tax. Comparing 3.5% muni vs. 5% taxable corporate. Muni TEY: 3.5% / (1 − 0.12) = 3.98% Taxable after-tax: 5% × (1 − 0.12) = 4.40% Taxable wins. At low brackets, the tax exemption isn't worth as much, and the higher taxable yield more than compensates. Low-bracket investors should generally prefer taxable bonds in taxable accounts. Generally: muni bonds make sense when combined marginal rate exceeds 25-30%. Below that, taxable bonds usually win on after-tax basis.
Use this calculator when evaluating municipal bond offerings, comparing fixed income alternatives across account types (taxable brokerage vs. retirement accounts), or planning income generation in taxable accounts.
Pair with bond-yield calculator (general bond analysis) and the various tax calculators for marginal rate context.
Important practical considerations:
1. **Munis are most valuable in high tax brackets.** Below 25-30% combined marginal rate, taxable bonds usually provide better after-tax income. High-bracket investors in high-tax states benefit most.
2. **In-state vs. out-of-state.** Bonds issued in your state of residence are typically exempt from both federal AND state tax. Out-of-state munis are exempt from federal only (state tax applies). Buying in-state maximizes the exemption.
3. **AMT exposure.** Private activity bonds (a subset of munis) can be subject to Alternative Minimum Tax. For high-income investors potentially subject to AMT, screen out AMT-eligible bonds or hold them in retirement accounts where AMT doesn't apply.
4. **Credit quality varies.** State general obligation bonds are typically very safe (state backing). Revenue bonds depend on specific revenue streams (toll roads, water systems, etc.) — variable credit quality. Defaults are rare but not unheard of (Detroit, Puerto Rico).
5. **Liquidity.** Individual munis trade less actively than Treasuries. Bid-ask spreads can be 0.5-2% — meaningful drag for small lots. Muni bond ETFs and mutual funds provide better liquidity and instant diversification at small fee cost.
6. **Don't hold munis in retirement accounts.** Munis' tax exemption is wasted inside IRAs and 401(k)s (which are already tax-deferred or tax-free). Hold munis in taxable accounts; hold taxable bonds in tax-advantaged accounts when allocating across accounts.
Calculate current yield and yield to maturity for bonds.
See how your money grows over time with compound interest and regular contributions.
See how mutual fund fees impact your returns over time.
Calculate basic and diluted earnings per share.
Calculate tax deferral and reinvestment requirements for a 1031 like-kind exchange.
Calculate tax savings using Net Unrealized Appreciation (NUA) for employer stock distributions.
Tax-Equivalent Yield
4.85%
Muni Annual Income
$3,500
Taxable After-Tax Income
$3,610
Annual Tax Savings
$-110
Taxable bond wins