Fidelity Financial Tools
Fidelity Taxable Equivalent Yield Calculator
Compare tax-free and taxable bond yields to see which offers a better after-tax return for your portfolio.
This chart visually compares the tax-free yield to the higher yield a taxable bond would need to match it after taxes.
What is a Fidelity Taxable Equivalent Yield Calculator?
A fidelity taxable equivalent yield calculator is a financial tool designed to help investors make an apples-to-apples comparison between the returns of a tax-free investment, like a municipal bond, and a taxable investment, such as a corporate bond. Since interest from municipal bonds is typically exempt from federal taxes (and sometimes state and local taxes), their stated yield is often lower than that of taxable bonds. This calculator reveals the yield a taxable bond must offer to provide the same after-tax return as its tax-free counterpart, a figure known as the taxable equivalent yield.
This calculation is crucial for investors, particularly those in higher income tax brackets. Without a tool like the fidelity taxable equivalent yield calculator, an investor might mistakenly choose a taxable bond with a higher stated yield, only to find its after-tax return is actually lower than a comparable tax-free option. The calculator levels the playing field, empowering users to make more informed and tax-efficient investment decisions.
The Taxable Equivalent Yield Formula and Mathematical Explanation
The core of any fidelity taxable equivalent yield calculator is its formula. The calculation is straightforward but powerful in its implications for portfolio management.
The formula is:
Taxable Equivalent Yield (TEY) = Tax-Free Yield / (1 – Combined Marginal Tax Rate)
The logic is to determine what pre-tax yield on a taxable investment would result in the same after-tax yield as a tax-free investment. It does this by dividing the tax-free yield by the percentage of income you keep after taxes (1 minus your marginal tax rate).
Variables Table
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Tax-Free Yield | The stated annual yield of the tax-exempt investment. | Percent (%) | 1% – 6% |
| Combined Marginal Tax Rate | The sum of your federal and state tax rates on the next dollar of income. | Percent (%) | 0% – 50%+ |
| Taxable Equivalent Yield (TEY) | The calculated yield a taxable bond needs to match the tax-free bond’s return. | Percent (%) | 1% – 10%+ |
Practical Examples (Real-World Use Cases)
Example 1: Investor in a High Tax Bracket
An investor in a high tax bracket (e.g., 35% federal + 5% state = 40% combined) is considering two bonds:
- A tax-free municipal bond with a 3% yield.
- A taxable corporate bond with a 4.5% yield.
Using the fidelity taxable equivalent yield calculator: TEY = 3% / (1 – 0.40) = 5.0%. In this case, the taxable bond would need to yield 5.0% to be equivalent. Since the corporate bond only yields 4.5%, the tax-free municipal bond is the better choice for this investor after taxes.
Example 2: Investor in a Low Tax Bracket
An investor in a lower tax bracket (e.g., 12% federal + 3% state = 15% combined) looks at the same bonds:
- A tax-free municipal bond with a 3% yield.
- A taxable corporate bond with a 4.5% yield.
The calculation changes: TEY = 3% / (1 – 0.15) = 3.53%. For this investor, the taxable corporate bond’s 4.5% yield is significantly more attractive than the 3.53% taxable equivalent yield of the municipal bond. This highlights how crucial a fidelity taxable equivalent yield calculator is for personalizing investment choices.
How to Use This Fidelity Taxable Equivalent Yield Calculator
- Enter the Tax-Free Yield: Input the stated yield of the tax-exempt bond you’re considering.
- Enter Your Marginal Tax Rate: This is the most critical input. You must use your *marginal* tax rate—the rate you pay on your next dollar of income—not your effective tax rate. Combine both your federal and state rates for the most accurate result. You can estimate your tax bracket if you’re unsure.
- Review the Results: The calculator instantly displays the Taxable Equivalent Yield. This is the number you should compare against the yields of any taxable bonds you are considering. The intermediate values show you the components of the calculation.
- Analyze the Chart: The bar chart provides a clear visual comparison, making it easy to see the “tax advantage” of the tax-free bond in terms of the extra yield a taxable bond would need.
| Marginal Tax Rate | Taxable Equivalent Yield |
|---|
Key Factors That Affect Taxable Equivalent Yield Results
- Federal and State Tax Rates: This is the most significant factor. The higher your combined marginal tax rate, the more valuable a tax-free bond becomes, resulting in a higher taxable equivalent yield.
- Changes in Tax Law: Future changes to federal or state tax brackets can alter the value proposition of a municipal bond over its lifetime. It’s a key consideration for long-term holdings.
- Alternative Minimum Tax (AMT): Some otherwise tax-free municipal bonds are subject to the AMT. Our fidelity taxable equivalent yield calculator assumes the bond is not subject to AMT, but investors should verify this status.
- Bond’s Credit Quality: The calculation focuses on tax implications, not risk. A lower-quality municipal bond might offer a higher tax-free yield, but it comes with increased credit risk compared to a high-quality taxable bond.
- Call Features: If a bond is callable, the yield-to-call might be a more relevant figure than yield-to-maturity, which can affect the inputs you use in a price/yield calculator.
- Location of Issuance: To be free from state and local taxes, you typically must purchase a municipal bond issued within your own state. Out-of-state municipal bonds are usually only exempt from federal taxes.
Frequently Asked Questions (FAQ)
1. Is a higher Taxable Equivalent Yield (TEY) always better?
Not necessarily. The TEY is a comparison tool. If a taxable bond’s actual yield is higher than the calculated TEY, the taxable bond is the better choice from a pure yield perspective. If it’s lower, the tax-free bond is better.
2. Does this calculator account for state and local taxes?
This fidelity taxable equivalent yield calculator is designed for you to input a *combined* tax rate (federal + state). You must add them together yourself for an accurate comparison, especially when comparing an in-state municipal bond (which is often state-tax-free) to a corporate bond.
3. What’s the difference between marginal and effective tax rate?
Your marginal tax rate is the rate charged on your last dollar of income, which is the correct rate for this calculation. Your effective tax rate is your total tax paid divided by your total income, which is an average and not suitable for this purpose.
4. Why are municipal bond yields typically lower than corporate bond yields?
The primary reason is their tax-exempt status. Investors are willing to accept a lower yield in exchange for not having to pay federal (and often state) taxes on the interest income. The market prices this benefit into the bond’s yield.
5. Can I use this calculator for investments other than bonds?
The concept applies broadly to comparing any tax-free income stream to a taxable one. However, it’s most commonly used for bonds as they are the most frequent source of tax-exempt investment income. For other comparisons, you might need a specialized financial advisor tool.
6. How does inflation affect this calculation?
This calculator does not account for inflation. Both the tax-free and taxable yields are nominal returns. An investor should separately consider the real (after-inflation) return of both options.
7. Where can I find my marginal tax rate?
You can find federal tax brackets on the IRS website. For state taxes, check your state’s department of revenue website. Remember to combine them for the most precise result in the fidelity taxable equivalent yield calculator.
8. Should I consult a professional?
Yes. This tool provides a mathematical comparison, but it does not constitute financial or tax advice. A financial advisor can help you make decisions based on your complete financial situation, risk tolerance, and goals. Check out Fidelity’s resources on portfolio construction tools & services.
Related Tools and Internal Resources
- Tax Calculators & Tools: Explore a full suite of Fidelity tools to help with tax planning, including calculators for capital gains and IRA contributions.
- Municipal Bonds Overview: A detailed PDF from Fidelity explaining the features, benefits, and risks associated with municipal bond investing.
- Investment Solutions: Discover Fidelity’s broad range of investment products and strategies to help you build a diversified portfolio.
- Fidelity Institutional Home: The main portal for financial professionals, offering market insights, research, and advanced tools.
- Price/Yield Calculator: A tool for calculating the estimated yield or price of a specific bond, which can be used to get the inputs for this calculator.
- Tools for Financial Advisors: Access a range of sophisticated calculators and planners designed for professional use.