Social Security Income tax, often known as Social Security benefits taxation, is a system within the United States that imposes taxes on a portion of Social Security retirement, survivor, and disability benefits. Not all Social Security benefits are subject to taxation. The taxable amount depends on your “combined income,” which comprises your adjusted gross income (AGI), tax-exempt interest, and half of your Social Security benefits. If you file individually and your combined income falls between $25,000 and $34,000, then you may owe income tax on up to 50% of your Social Security benefits. If your combined income exceeds $34,000, then up to 85% of your benefits may be taxable. For married couples filing jointly, the thresholds are $32,000 and $44,000, respectively.