SalarySplitHub
Idaho ยท 2026 tax year State-specific estimate
Idaho salary after tax calculator
Idaho uses a flat 5.8% income tax rate, applied to federal AGI with a standard deduction matching federal amounts.
Paycheck Breakdown
| Pay Period | Gross Pay | Deductions | Take-Home Pay |
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Idaho estimate
Estimated take-home
Your estimate changes with filing status, Idaho rules, and the deductions you enter.
Idaho State Income Tax Guide (2026)
Idaho uses a flat 5.8% income tax rate, applied to federal AGI with a standard deduction matching federal amounts.
1. Idaho Flat Tax Rate
Idaho applies a single flat income tax rate of 5.8% to taxable income. Unlike progressive states, the same rate applies whether you are an entry-level worker or a high earner, which makes the calculation straightforward.
2. Deductions and Conformance
For 2026, the Idaho standard deduction is $16,100 for single filers and $32,200 for married couples filing jointly. Pre-tax 401(k) contributions, HSA contributions, and employer health premiums reduce your Idaho taxable income.
Compare With Other Flat-Tax States
Idaho is one of several states using a flat income tax rate. Compare your take-home pay across flat-tax states: Illinois (4.95%), Pennsylvania (3.07%), Georgia (4.99%), North Carolina (3.99%), Arizona (2.5%), Colorado (4.4%), Michigan (4.25%), Indiana (3.05%), Iowa (3.8%), Kentucky (3.5%), Utah (4.55%), Mississippi (4.7%).
Compare Take-Home Pay Across States
Wondering how your income taxes compare to other states? Explore our detailed guides and paycheck calculators for other states: