Social Security (SS) income is not taxable until a taxpayer’s AGI (without Social Security income), 50% of their Social Security income, tax-exempt interest income, and certain other infrequently encountered additions total and exceed a specific threshold. The threshold is $32,000 for married taxpayers filing jointly, zero for married taxpayers filing separately and $25,000 for all others. Once the threshold is exceeded, the Social Security income subject to tax varies from 50% to 85%.
Few taxpayers understand this threshold for SS taxation and...