Municipal Bond Tax-Equivalent Yield Calculator
Calculate the taxable equivalent yield required on a corporate bond or CD to match the after-tax cash return of a tax-exempt municipal bond.
A taxable corporate bond or CD must pay at least 7.72% to match this 3.85% muni bond.
Municipal Bond Tax-Equivalent Yield Calculator (TEY): Calculate taxable equivalent yield required on corporate bonds to match tax-exempt municipal bonds. Fast, interactive, and completely free with instant results.
How to Use the Municipal Bond Tax-Equivalent Yield Calculator
Enter Municipal Bond Yield
Input the tax-exempt annual yield offered by the municipal bond or muni bond ETF.
Select Federal Tax Bracket
Choose your marginal federal income tax bracket (from 10% up to 37%).
Add State Tax & NIIT
Enter your state income tax rate and indicate if you are subject to the 3.8% Net Investment Income Tax.
Compare Taxable Equivalent
Review the gross taxable yield required on corporate bonds or CDs to beat the municipal bond.
Financial Planning Guide: Municipal Bonds and Tax-Equivalent Yield (TEY): Maximizing After-Tax Income
Municipal bonds ("munis") are debt securities issued by state, city, and local governments to finance essential public infrastructure projects, such as highways, bridges, public schools, and water utilities. Under federal tax law, the interest income earned on qualified municipal bonds is 100% exempt from federal income taxes. Furthermore, if you reside in the state where the bond was issued, the interest is typically exempt from state and local income taxes as well, making the bond "double tax-free."
Because municipal bonds are tax-exempt, they generally offer lower nominal interest rates than taxable corporate or Treasury bonds. To fairly compare a tax-exempt municipal yield against a taxable corporate bond or bank CD, an investor must calculate the Tax-Equivalent Yield (TEY):
TEY = Municipal Yield / (1 - Effective Combined Marginal Tax Rate)
For investors in high federal tax brackets (such as 32%, 35%, or 37%)—especially those residing in high-tax states like California, New York, or New Jersey, or those subject to the 3.8% Affordable Care Act Net Investment Income Tax (NIIT)—the combined marginal tax rate frequently exceeds 45% to 50%. At a 50% combined tax rate, a tax-free 4.0% municipal bond delivers the exact same net cash flow as an 8.0% taxable corporate bond.
Calculating your TEY ensures you never mistakenly reject a municipal bond simply because its nominal headline yield appears lower than a fully taxable CD or corporate bond.
Key Benefits & Features
True After-Tax Benchmark
Reveals the exact taxable interest rate needed on a corporate bond or CD to match a muni bond.
Triple Tax Integration
Seamlessly incorporates Federal tax brackets, State tax rates, and the 3.8% NIIT surtax.
In-State vs Out-of-State
Models double-tax-exempt in-state bonds versus federal-only out-of-state bonds.
Annual Tax Savings Metric
Calculates the real cash tax dollars retained in your pocket per $100,000 invested.
High-Bracket Optimization
Empowers high-income earners to optimize taxable brokerage allocations.
100% Client-Side Privacy
Your tax brackets and state residency details remain completely private on your machine.
Why do municipal bonds pay lower interest than corporate bonds?
Because municipal bond interest is tax-free. Investors are willing to accept a lower coupon rate because they do not have to pay federal (and often state) taxes on the interest received.
What is the Net Investment Income Tax (NIIT)?
The NIIT is a 3.8% surtax on net investment income (including capital gains, dividends, and taxable interest) that applies to high-income individuals with modified adjusted gross incomes above $200,000 (single) or $250,000 (married filing jointly).
Are municipal bonds safe from default?
Historically, investment-grade municipal bonds have an exceptionally low default rate (under 0.1% over 10-year horizons), far safer than corporate bonds of equivalent rating tiers.
Should I hold municipal bonds in a 401(k) or IRA?
No! Never hold tax-exempt municipal bonds inside an IRA or 401(k). Retirement accounts are already tax-sheltered, so you would be accepting a lower interest rate for a tax benefit you cannot use.
What is the Alternative Minimum Tax (AMT) risk on munis?
Certain municipal bonds issued for private purposes (like airport renovations or housing developments) are subject to the federal Alternative Minimum Tax (AMT). Check if a bond is classified as "AMT-free" if you are subject to the AMT.
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Frequently Asked Questions
Yes, Municipal Bond Tax-Equivalent Yield Calculator (TEY) is 100% completely free to use online with no hidden subscription fees, accounts, or software installation required.
Absolutely. All processing occurs securely within your web browser. Your inputs, calculations, and files are never stored, logged, or uploaded to external servers.
Yes. Municipal Bond Tax-Equivalent Yield Calculator (TEY) is fully responsive and optimized for seamless use across smartphones, tablets, laptops, and desktop computers.
No plugins, extensions, or downloads are required. Municipal Bond Tax-Equivalent Yield Calculator (TEY) operates directly in any standard, modern web browser.