The Hidden Cost of Large IRA Withdrawals: How $50,000 Can Cost You $6,200 in Taxes

For single filers, Social Security taxation uses combined-income thresholds of $25,000 and $34,000 that have not been inflation-adjusted since 1984. Combined income equals adjusted gross income plus tax-exempt interest plus half of Social Security. With $30,000 of Social Security, combined income is $15,000, so none of Social Security is taxable and federal income tax is essentially zero after the standard deduction. Adding a $50,000 traditional IRA withdrawal raises combined income to $65,000, triggering the maximum inclusion rule where 85% of Social Security becomes taxable, adding $25,500 to taxable income. The resulting AGI is about $75,500; subtracting the 2026 standard deduction of $16,100 plus a $2,050 age add-on leaves taxable income in the low $50,000s. Using 2026 brackets (10% up to $12,400, 12% up to $50,400, then 22%), the federal bill is about $6,200. A Roth IRA withdrawal would not increase combined income in the same way, keeping Social Security untaxed.

"For a single filer, the "combined income" thresholds are $25,000 and $34,000, and they have not been adjusted for inflation since 1984. Combined income is adjusted gross income plus any tax-exempt interest plus half of Social Security."

Read at 24/7 Wall St.