# Muni Interest Pushes Social Security Taxable

> Municipal bond interest can make more of your Social Security taxable even when tax-free.
- Title: Muni Interest Pushes Social Security Taxable · 24/7 Wall St.
- Summary: Municipal bond interest can make more of your Social Security taxable even when tax-free. Municipal bond interest adds to Social Security taxable income…
- Keywords: social security, municipal bonds, taxable income, treasury yields, irs worksheet, bond interest, combined income, Muni, Interest, Pushes, Social, Security
- Source: 24/7 Wall St. — https://247wallst.com/personal-finance/social-security/2026/10/07/bond-yields-are-back-above-5-tax-free-municipal-bond-interest-can-still-make-more-of-social-security-taxable
- Author: Gerelyn Terzo
- Published: 2026-10-08T01:00:46+00:00
- Read time: 1 min
- Topics: social security, municipal bonds, taxable income, treasury yields, irs worksheet, bond interest, combined income
## Municipal Bonds Avoid Federal Tax
Municipal bond interest escapes federal income tax but gets added to Social Security calculations.

> Municipal bond interest escapes federal income tax, but the IRS has a separate formula that pulls it back into Social Security calculations in a way most retirees never see coming.
## Current Bond Yields Rise
The 10-year Treasury yield has risen to about 5.2% and the 20-year pays close to 5.6%.

> The 10-year Treasury yield has risen to about 5.2%, and the 20-year pays close to 5.6%
## Retirees' Taxable Thresholds
A single filer starts owing tax on benefits once combined income goes above $25,000.

> A single filer starts owing tax on benefits once combined income goes above $25,000
## Linda's Taxable Situation
Linda gets $30,000 from Social Security and $10,000 of other taxable income without munis.

> Linda gets $30,000 a year from Social Security, so half of it is $15,000. She also has $10,000 of other taxable income.
## Muni Interest Adds Taxable Portion
Adding $20,000 of municipal interest makes $13,850 of Social Security taxable.

> Now $13,850 of her Social Security, about 46% of it, counts as taxable income
## Yield Impact on Thresholds
Higher bond yields help retirees reach taxable thresholds with less portfolio money.

> At 5%, a $400,000 bond portfolio pays $20,000 a year. At 2%, you would need $1 million to get the same income
## Taxable Impact After 2027
The 2027 cost-of-living increase will push Social Security taxable thresholds higher.

> The 2027 increase is on track for 3.5%-3.6%. That raises the half-of-benefits piece of the formula
## Key takeaway

Municipal bond interest adds to Social Security taxable income despite being federally tax-exempt.