A $40,000 salary in Idaho takes home about $33,308 a year ($1,281 per biweekly paycheck) after $2,620 federal income tax, $1,012 Idaho income tax and $3,060 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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