Tax Equivalent Yield Calculator

Written by Great Medico

Updated September 25, 2026 •2 min read

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A result from Tax Equivalent Yield Calculator becomes more meaningful when the source numbers and formula stay visible. That makes it easier to reproduce the calculation instead of relying on an unexplained figure.

What this calculator does

Tax Equivalent Yield Calculator converts a tax-exempt bond yield into the taxable yield needed to produce the same after-tax return at the entered marginal tax rate. It works from tax-exempt bond yield and marginal tax rate. For Tax Equivalent Yield Calculator, because no outside market data is inserted, the result stays tied to the exact assumptions visible on the page.

How to use it

Use the form to supply Tax-exempt bond yield and Marginal tax rate. For Tax Equivalent Yield Calculator, enter percentage or rate fields on the scale displayed by the form rather than converting them to an unstated format. Before calculating, recheck Tax-exempt bond yield, Marginal tax rate against the source numbers you intend to analyze.

How the calculation works

Tax-equivalent yield = tax-exempt yield ÷ (1 − marginal tax rate). The Tax Equivalent Yield Calculator result follows the stated equation and the form values relevant to that calculation. For Tax Equivalent Yield Calculator, the result is only meaningful for the exact values supplied, so input errors should be corrected before interpretation.

Example

A 4% tax-exempt yield and 30% marginal tax rate give a tax-equivalent yield of about 5.71%. The Tax Equivalent Yield Calculator example is a math check only; your result should come from the values entered on the form.

How to interpret the result

The result is a comparison threshold: a taxable investment would need to yield about that amount before tax to match the entered tax-exempt yield after the assumed tax rate. For a clean comparison with Tax Equivalent Yield Calculator, keep the displayed input definitions and measurement basis consistent across scenarios.

Limitations and notes

Actual tax treatment depends on jurisdiction, account type, alternative minimum tax rules, state and local taxes, and investor circumstances. The calculator uses one marginal tax rate and does not compare credit risk, maturity, liquidity, or call features. A fresh Tax Equivalent Yield Calculator calculation is appropriate whenever the values or timing represented by its displayed inputs change.