The 2026 federal income tax brackets for single, married and head of household filers: 10% to 37%, with the 2026 standard deduction ($16,100 single, $32,200 married) and a worked example.
The 2027 federal income tax brackets for single, married and head of household filers: 10% to 37%, with the 2027 standard deduction ($16,600 single, $33,200 married) and a worked example.
January 1, 2027. They set withholding on 2027 paychecks and apply to the return you file in early 2028. Returns filed in early 2027 still use the 2026 brackets.