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Tax Year 2026Updated July 23, 2026

Idaho Paycheck Calculator 2026

Idaho uses a flat income tax rate of 5.30% on all taxable income. Unlike states with graduated brackets, every dollar you earn above the exemption threshold is taxed at the same rate. Combined with federal income tax and FICA deductions, use the calculator below to see your actual take-home pay per pay period.

Idaho's Flat Income Tax

Idaho levies a flat 5.30% income tax on all taxable income. There are no progressive brackets - whether you earn $30,000 or $300,000, the state rate is the same. This simplifies withholding calculations compared to graduated-bracket states.

Groceries are taxed at a reduced 6.00% rate.

How Your Idaho Paycheck Is Calculated

  1. Gross pay: Your annual salary divided by the number of pay periods.
  2. Federal income tax: 2026 progressive brackets (10%-37%) after the federal standard deduction of $16,100 (single) or $32,200 (MFJ).
  3. Social Security: 6.2% on wages up to $184,500.
  4. Medicare: 1.45% on all wages, plus 0.9% above $200,000 (single).
  5. Idaho state income tax: Flat 5.30% on taxable income.

Idaho Standard Deduction

Idaho's standard deduction for 2026 is $16,100 for single filers and $32,200 for married filing jointly. This is subtracted from gross income before Idaho's tax brackets are applied. Note: the state deduction is separate from and much smaller than the federal standard deduction of $16,100.

Grocery Tax in Idaho

Idaho charges a 6.00% tax on groceries, which is lower than the general sales tax rate of 6.00%. While this does not affect paycheck withholding, it is a notable cost-of-living factor for Idaho residents. Most states exempt groceries from sales tax entirely.

Worked Examples

Example 1: $42,000/year - Married Filing Jointly, Weekly

Profile: $42,000 annual salary, Married Filing Jointly filer, paid weekly (52 paychecks/year)

Gross per period: $807.69
Federal income tax: -$18.85
Social Security: -$50.08
Medicare: -$11.71
Idaho state income tax: -$42.81
Net take-home pay: $684.24 per paycheck ($35,580/year)
Effective total tax rate: 15.28%

Example 2: $135,000/year - Single, Semi-monthly

Profile: $135,000 annual salary, Single filer, paid semimonthly (24 paychecks/year)

Gross per period: $5,625.00
Federal income tax: -$880.58
Social Security: -$348.75
Medicare: -$81.56
Idaho state income tax: -$298.13
Net take-home pay: $4,015.98 per paycheck ($96,384/year)
Effective total tax rate: 28.60%

Example 3: $62,000/year - Head of Household, Monthly

Profile: $62,000 annual salary, Head of Household filer, paid monthly (12 paychecks/year)

Gross per period: $5,166.67
Federal income tax: -$349.00
Social Security: -$320.33
Medicare: -$74.92
Idaho state income tax: -$273.83
Net take-home pay: $4,148.59 per paycheck ($49,783/year)
Effective total tax rate: 19.70%

Idaho Tax Notes

  • Flat tax rate: 5.30% on all taxable income.
  • Supplemental withholding rate: 5.30% for bonuses and supplemental wages.
  • Grocery tax: 6.00% on groceries (below the general sales tax rate).

Idaho does not impose local income taxes. Some resort cities levy additional local sales taxes (up to 3%).

OBBBA Conformity

Idaho has not confirmed conformity with the federal OBBBA deductions for overtime and tips. Until the state legislature or tax authority acts, these deductions apply only on the federal return. Idaho state income tax on those wages remains unchanged.

Frequently Asked Questions

What taxes are deducted from my Idaho paycheck?
Your Idaho paycheck has deductions for federal income tax (10%-37% progressive brackets), FICA (Social Security + Medicare), and Idaho state income tax at a flat rate of 5.30%.
How accurate is this paycheck calculator?
This calculator estimates take-home pay using 2026 federal and Idaho state tax rates. It models federal income tax, FICA, and state income tax. It does not include pre-tax deductions (401(k), HSA, health insurance premiums), post-tax deductions, or state-specific payroll taxes (disability insurance, paid leave). Your actual paycheck may differ.
How does Idaho's flat income tax work?
Idaho uses a flat tax rate of 5.30% that applies to all taxable income regardless of how much you earn. Unlike graduated-bracket states where higher income is taxed at higher rates, every dollar of taxable income in Idaho is taxed at the same rate.
Is Idaho's flat tax rate applied to all my income?
The flat rate applies to your taxable income, which is your gross income minus any applicable deductions or exemptions. Idaho provides a standard deduction that reduces taxable income. The flat rate does not apply to income below these thresholds.
Does Idaho tax groceries?
Yes. Idaho charges a 6.00% tax on groceries, which is lower than the general sales tax rate. While this does not directly affect your paycheck withholding, it does affect your overall cost of living in Idaho.
How are bonuses and supplemental wages taxed in Idaho?
Idaho withholds state tax on bonuses, commissions, and other supplemental wages at a flat rate of 5.30%. This may differ from your regular withholding rate. At the federal level, supplemental wages are typically withheld at a flat 22% (or 37% above $1 million).
Does Idaho conform to the OBBBA overtime and tips deductions?
Idaho has not yet confirmed whether it will conform to the federal OBBBA deductions for overtime pay and tip income. Until the state legislature or tax authority acts, these deductions reduce only your federal taxable income. Your Idaho state income tax on those wages remains unchanged.