Finance & Money
Bond After-Tax Yield Calculator
Combine entered federal and regional rates without double counting, calculate taxable after-tax yield, and translate the exempt yield into a taxable-equivalent reference.
Simplified combined tax rate-
After-tax taxable yield-
Taxable-equivalent yield of exempt bond-
After-tax annual taxable-bond income-
Annual tax-exempt income-
Exempt income minus taxable after-tax income-
Decision view
Taxable and tax-exempt yield comparison
Taxable and tax-exempt yield comparisonAfter-tax taxable yield is compared with the entered exempt yield and its taxable equivalent.
Exact scenario comparisonFederal marginal tax rate (%) changes while all other entered assumptions remain constant.
| Federal marginal tax rate (%) | Simplified combined tax rate | After-tax taxable yield | Taxable-equivalent yield of exempt bond | After-tax annual taxable-bond income | Annual tax-exempt income | Exempt income minus taxable after-tax income |
|---|
How to use Bond After-Tax Yield Calculator
- Confirm the bond's actual tax treatment.
- Use marginal rates applicable to the income.
- Compare credit, duration, liquidity, and call risk after the tax screen.
Calculator guide
Understanding Bond After-Tax Yield Calculator
Taxable and tax-exempt bonds should be compared after applying the investor's relevant marginal tax assumptions to the same investment amount.
Calculation method
How the calculation works
Combine entered federal and regional marginal rates without double counting, then compare taxable after-tax yield with a tax-exempt equivalent yield and income. Combine rates multiplicatively, reduce taxable yield by the combined rate, divide exempt yield by one minus the rate for equivalent yield, and compare annual income.
Bond comparison
Complete the decision after the tax screen
Equivalent yield is only the first comparison layer.
Worked situations
Practical examples
- A tax-exempt yield can exceed the taxable bond's after-tax yield.
- Taxable-equivalent yield rises with marginal tax rate.
- Regional exemption depends on issuer and residence.
Better inputs
Useful tips
- Check alternative minimum tax exposure.
- Use the account's tax status.
- Do not choose a bond on yield alone.
Before relying on the result
Limitations and common mistakes
- Tax law, deductions, gains, AMT, issuer, residence, account type, and surtaxes are simplified.
- Combined rate is an approximation.
- Credit and market risk are excluded.
Reference
Key terms
- After-tax taxable yield
- Taxable yield after the entered combined marginal rate.
- Taxable-equivalent yield
- Taxable yield needed to match an exempt yield.
- Marginal rate
- Rate applied to the next unit of taxable income.
- Tax exemption
- Legal exclusion that depends on instrument and taxpayer facts.
Important note
Calculated from the entered values and stated financial terms. It is not a product quote, lending decision, tax filing, or investment recommendation.
Frequently asked questions
Are municipal bonds always tax-free?
No; treatment depends on issuer, income type, residence, and law.
Why combine rates multiplicatively?
It avoids taxing the same income twice in the simplified model.
Is taxable-equivalent yield a return forecast?
No.
Does the calculator include capital gains tax?
No.