IDAHO PAYCHECK CALCULATOR

Idaho has spent the last several years steadily cutting its income tax and simplifying it at the same time. The state now runs a single flat rate rather than the multi-bracket system it used a few years ago, and that rate has come down further recently: House Bill 40, signed by Governor Brad Little on March 6, 2025, cut it from 5.695% to 5.3%, retroactive to the start of that year, and the same rate carries into 2026 with no further reduction currently scheduled. The Tax Foundation’s 2026 State Tax Competitiveness Index ranks Idaho 9th overall out of 50 states, a strong showing built on that flat, moderate income tax and property taxes that run well below the national average. Idaho has also seen a genuine population boom in recent years, with Boise, Meridian, and Nampa ranking among the fastest-growing metro areas in the country, driven partly by employers like Micron Technology and HP and partly by residents moving in from higher-tax states like California.

What lands on an Idaho paystub is short and easy to follow. Federal income tax, Social Security, and Medicare come out first, the same as anywhere else. Idaho state tax follows, calculated at a single 5.3% rate on taxable income after the standard deduction, and Idaho simply uses the federal standard deduction rather than setting its own. There is no city or county income tax anywhere in the state, and no state disability insurance or paid family leave deduction either. If you are comparing Idaho against a move, the Mountain West has some of the widest tax variation in the country: see the Washington paycheck calculator and Nevada paycheck calculator for neighbors with no income tax at all, and keep in mind that Oregon, right next door, has no sales tax but a top income tax rate approaching 10%.

Idaho Paycheck Calculator

How the Federal Number Was Worked Out

Take the default example above, a single filer earning $70,000 a year with no other adjustments. Here is exactly how the federal piece gets built, step by step, using the 2026 IRS brackets and the $16,100 single standard deduction, the same deduction Idaho borrows for its own state return.

On the Idaho side, that same $53,900 in taxable income (after the same $16,100 deduction) just gets multiplied by 5.3%, no further brackets involved.

Idaho vs Its No-Tax Neighbors at $70,000 (Single Filer)

Idaho sits in an unusual neighborhood: Washington and Nevada charge no wage income tax at all, while Oregon has no sales tax but one of the steepest income tax structures in the country. These numbers assume a single filer taking the standard deduction, with no local or city-level tax added.

*Net pay estimate includes federal tax and FICA at $70,000 gross, single filer, standard deduction, before any local or city-level tax. Oregon and Utah are left out of this table since their standard deduction figures for 2026 vary meaningfully across sources; Oregon runs a much steeper progressive structure topping out at 9.9%, while Utah charges a flat 4.5%, both worth checking directly before comparing precise dollar amounts.

Washington and Nevada obviously win outright on paper since neither taxes wages at all, and that gap widens the higher an income climbs. What keeps Idaho competitive anyway is everything around the income tax rather than the rate itself: property taxes near 0.69% effective are genuinely low, there is no local income tax anywhere in the state, and the flat structure means no bracket creep to worry about as raises come in. For anyone weighing Idaho against Oregon specifically, the calculus flips depending on spending habits: Oregon’s missing sales tax helps big spenders, while Idaho’s flatter, lower income tax tends to help most working households more.

Where Your Paycheck Money Actually Goes

Picture that same $70,000 salary landing as a biweekly paycheck of $2,692.31 before anything is taken out. Here is the order things get pulled, and what is left standing at the end.

Idaho’s Move to a Flat Tax and the 2025 Rate Cut

Idaho collapsed what used to be a multi-bracket progressive income tax into a single flat rate over the past several legislative sessions, part of a broader, consistently bipartisan push to cut income taxes while state revenue ran high. The most recent and best-documented step in that trajectory is House Bill 40. Governor Little signed it on March 6, 2025, cutting the flat rate from 5.695% to 5.3%, and the Legislature followed up with House Bill 479 to make the cut retroactive to January 1, 2025. That 5.3% rate is the one still in effect for tax year 2026, with no further scheduled reduction currently written into law, though lawmakers have signaled openness to cutting it again if state revenue allows. The same bill that cut the rate also expanded Idaho’s exemption for military retirement pay and removed the state capital gains tax on the sale of gold bullion, two narrower provisions that moved through the Legislature alongside the headline rate cut.

How Idaho’s Tax Burden Stacks Up

Idaho’s tax mix leans on all three major categories fairly evenly rather than skipping one entirely, which is part of why it lands in the top 10 on the Tax Foundation’s competitiveness ranking without being a headline no-tax state like its neighbors Washington or Wyoming. The one place Idaho stands out less favorably is groceries: unlike states such as Utah or Illinois that tax food at a reduced rate, Idaho applies its full 6% sales tax to groceries, offset only partially by the state’s Grocery Tax Credit of $120 per person per year, or $140 for residents 65 and older.

New Residents and Idaho’s Domicile Scrutiny

Idaho’s population growth over the past several years, particularly around Boise, Meridian, and Nampa, has been driven heavily by people moving in from higher-tax, higher-cost states, California especially. That growth has made Idaho’s tax authority notably attentive to residency claims from people who still spend significant time or maintain significant ties in their old state. Simply buying a home in Idaho and registering to vote is not enough to establish residency if the bulk of someone’s life, their job, their driver’s license, their primary home, is still genuinely elsewhere. Idaho generally expects a new resident to spend a meaningful majority of the year physically in the state, roughly 270 or more days, or to clearly establish domicile through steps like an Idaho driver’s license, vehicle registration, and voter registration, before treating that person as a full-year Idaho taxpayer for state income tax purposes. Anyone moving from a state like California, which is known for auditing residency claims aggressively when a taxpayer leaves, should keep clear documentation of the move date and update the practical details of their life, not just their mailing address, to avoid disputes with either state over where they actually owed tax during the transition year.

Idaho’s tax code has gotten simpler at almost exactly the same pace it has gotten cheaper, a combination not every state manages. A single flat rate is easy to plan a raise or bonus around, borrowing the federal standard deduction means one less set of numbers to track, and low property taxes do a lot of quiet work in the background that a headline income tax rate does not capture. The tradeoff shows up mostly at the grocery store, where Idaho taxes food at the full rate with only a partial credit to offset it, a detail easy to miss until the first grocery run after moving in.