A $100,000 salary in Idaho takes home about $74,988 a year ($2,884 per biweekly paycheck) after $13,170 federal income tax, $4,192 Idaho income tax and $7,650 FICA (Social Security and Medicare). Assumes a single filer taking the standard deduction, 2026 federal and Idaho rates, and no 401(k) or other pre-tax deductions.
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