Idaho uses a flat state income tax. Everyone pays the same percentage on taxable wages, regardless of income.
PayslipIQ provides educational information and estimated calculations only. It does not provide tax, legal, financial, accounting, employment, benefits, or payroll advice. PayslipIQ is not a CPA firm, law firm, financial advisor, payroll provider, or tax authority. Always verify your paycheck, deductions, withholdings, and tax position with your employer's payroll department, a qualified CPA, the IRS, your state tax authority, or another appropriately qualified professional. Calculations are estimates; your actual paycheck may differ based on factors specific to your employer, location, benefits elections, and personal tax situation.
How a Idaho paycheck is built
Every Idaho worker pays federal income tax, calculated on the W-4 you submitted to your employer using the IRS Publication 15-T tables. Federal income tax is followed by FICA: 6.2 percent Social Security up to the annual wage base, plus 1.45 percent Medicare on every dollar. The 0.9 percent Additional Medicare Tax applies once year-to-date wages cross $200,000 single or $250,000 married filing jointly.
Idaho adds a flat state income tax of approximately 5.80 percent. Verify the current rate with the Idaho State Tax Commission.
What changed recently in Idaho
- Flat 5.8% rate effective 2023.
- No state PFL or SDI.
- Standard deduction tied to federal.
Idaho payroll quirks workers should know
- Idaho W-4 form for state withholding.
- No local payroll tax.
Example breakdown
A hypothetical Idaho worker on a $65,000 annual salary, paid bi-weekly, single filer, no extra adjustments. Educational only, your real paycheck differs.
| Gross (bi-weekly) | $2500.00 |
| Federal income tax | -$250.00 |
| Social Security (6.2%) | -$155.00 |
| Medicare (1.45%) | -$36.25 |
| Idaho state tax | -$145.00 |
| Estimated take-home | $1913.75 |
Run your own numbers in the Idaho paycheck calculator.
Authoritative sources
Frequently asked questions
- Does Idaho have state income tax?
- Yes. Idaho uses a flat state income tax rate. Verify the current rate with the Idaho State Tax Commission.
- Are there local income taxes in Idaho?
- No. Idaho does not have local income taxes on wages.
- Does Idaho have State Disability Insurance or Paid Family Leave premiums?
- No. Idaho does not have state-mandated SDI or PFL employee premiums.
- Does Idaho have daily-overtime rules?
- No. Idaho follows federal FLSA: 1.5x for hours above 40 in a workweek.
- What is FICA on a Idaho paycheck?
- FICA is federal: 6.2 percent Social Security up to the annual wage base, plus 1.45 percent Medicare on every dollar. The 0.9 percent Additional Medicare Tax applies above $200,000 single or $250,000 married filing jointly. FICA applies in every state.
- Where do I verify Idaho state tax withholding?
- The Idaho State Tax Commission (https://tax.idaho.gov/) is the authoritative source. For your specific paycheck, contact your employer's payroll team or a CPA.
- Why is my Idaho tax flat?
- Idaho consolidated multiple brackets to a single 5.8% rate in 2023. Simpler, but high-income earners no longer get the lower-bracket relief on their first dollars.