This free Idaho paycheck calculator shows your 2026 take-home pay. It covers federal income tax, Idaho state tax, Social Security and Medicare. Idaho taxes income at one flat rate of 5.3%. There are no brackets to climb through as your pay grows. The rate is the same on your first dollar and your last.
The rate came down from 5.695% under HB 40, signed on 6 March 2025. It still stands for 2026. No Idaho city or county charges an income tax. Your state tax is the whole state-level bill on your wages. That keeps an Idaho payslip short and easy to read.
How Idaho taxes your paycheck in 2026
Idaho starts from your federal taxable income. That means the federal standard deduction is what lowers your Idaho tax. Idaho writes no deduction of its own, and there is no personal exemption. Whatever the federal form leaves as taxable is what Idaho taxes. So your federal choices drive your Idaho bill.
One slice of income escapes the 5.3% rate. Idaho taxes a first band at 0%. That band is about $4,811 for a single filer and $9,622 for a married couple filing jointly. Those figures are adjusted for inflation each year. It is the only break Idaho writes into the rate itself.
Head of household filers get the larger band. Idaho treats a head of household return like a joint return here. So you get the $9,622 zero band, not the single one. Above that band the flat 5.3% applies to every dollar. Check your filing status before you estimate your Idaho tax.
What a flat rate means for your paycheck
A flat rate makes your Idaho withholding easy to predict. A raise never moves you into a higher state bracket. The extra pay is taxed at 5.3%, the same as the pay you already had. Only your federal tax steps up. That makes planning a bonus or some overtime simple at state level.
Idaho tax is only part of the story. Social Security takes 6.2% of wages up to the 2026 wage base of $184,500. Medicare takes 1.45% with no cap. An extra 0.9% Medicare surcharge starts on wages above $200,000. Those FICA rates are set by federal law, not by Idaho.
A traditional 401(k) lowers your federal taxable income. Because Idaho starts from that figure, it lowers your Idaho tax too. It does not lower your Social Security or Medicare wages. Payroll HSA money lowers all three. Roth 401(k) money lowers nothing, because you pay the tax on it now.
Local taxes, and what this page leaves out
No Idaho city charges an income tax. Boise, Meridian, Nampa and Idaho Falls take nothing extra from your pay. Some resort towns do have a local option tax. Those are sales taxes on things like lodging, not taxes on wages. So your workplace address does not change your Idaho withholding.
Idaho gives a grocery credit that shows up when you file your return. It does not change what your employer withholds. The same goes for the Idaho child tax credit. Neither one lands on your payslip. Both arrive as a refund or a smaller bill at filing time.
If you fill out a new Idaho Form ID W-4, your withholding can shift. Extra allowances lower it and extra dollars raise it. This calculator assumes standard withholding. Use the fields above to add your filing status and your pre-tax savings. The result updates as you type.
Idaho paycheck FAQ
- How much is $60,000 after taxes in Idaho?
- Start with a single filer and no pre-tax money. That worker keeps about $48,318 a year, $1,858 per biweekly paycheck, 19.5% total tax rate. The figure covers federal income tax, Idaho's flat 5.3% state tax, Social Security and Medicare.
- How much is $100,000 after taxes in Idaho?
- Take a single filer with no pre-tax money. That worker keeps about $74,988 a year, $2,884 per biweekly paycheck, 25.0% total tax rate. Idaho's flat rate means a raise never pushes you into a higher state bracket. Only your federal tax steps up.
- What is Idaho's income tax rate in 2026?
- It is a flat 5.3% on taxable income. HB 40 cut it from 5.695% and was signed on 6 March 2025. That rate still applies for 2026. A first slice of income is taxed at 0%. Every filing status pays the same rate.
- Does Idaho have a standard deduction?
- Not one of its own. Idaho starts from your federal taxable income, so the federal standard deduction is what applies. There is also no Idaho personal exemption. So your federal choices carry straight into your state return.
- What is the Idaho 0% band?
- It is a first slice of taxable income that Idaho taxes at nothing. It is about $4,811 for a single filer and $9,622 for a married couple filing jointly. Head of household filers get the $9,622 band. The amount is adjusted for inflation each year. Above the band every dollar is taxed at 5.3%.
- Do Idaho cities charge income tax?
- No. Boise, Meridian, Nampa and Idaho Falls take nothing from your wages. No county charges one either. Idaho resort towns can add a local option tax, but that falls on sales, not pay. Your state tax is the whole state-level bill on your wages.
- Does my 401(k) lower my Idaho state tax?
- Yes. A traditional 401(k) lowers your federal taxable income, and Idaho starts from that figure. It does not lower your Social Security or Medicare wages. Payroll HSA money lowers all three. The calculator handles that split for you.
Sources
All sources accessed and figures verified August 2026.