Idaho Paycheck Calculator 2026

How this calculator works

Idaho is one of only two states on this site with a genuinely flat income tax rate — the other is Utah, which works through a credit instead of a threshold. Idaho's version is simpler to describe: nothing is taxed up to a threshold, and every dollar above it is taxed at the same 5.3%, no matter how high your income goes. That threshold, for 2026, is $16,100 for a single filer, also $16,100 for a head of household, and $32,200 filing jointly. The single and joint figures match the 2026 federal standard deduction for those two filing statuses to the dollar; the head-of-household figure does not — Idaho groups head of household with the single filer instead of giving it the larger federal head-of-household deduction. More on that below.

The calculator applies four deductions, in this order:

• Federal income tax. Your gross pay minus the federal standard deduction for your filing status, run through the 2026 federal brackets.
• Social Security at 6.2% of gross wages, up to the 2026 wage base of $184,500.
• Medicare at 1.45% of all wages, with no cap, plus the 0.9% Additional Medicare Tax on wages above $200,000.
• Idaho income tax: your gross pay minus the $16,100 or $32,200 threshold, taxed at a flat 5.3%.

Rates come from the agencies that set them: the IRS for the federal brackets, the standard deduction and FICA, cross-checked against the Social Security Administration for the wage base; and for the state layer, the Idaho State Tax Commission’s Table for Percentage Computation Method of Withholding, document EPB00744, revised July 23, 2026, and the rate statute itself, Idaho Code section 63-3024. Both were read on September 12, 2026. tax.idaho.gov and legislature.idaho.gov would not respond to a direct connection from the machine that built this page, so both documents were read from their Internet Archive snapshots — the same PDFs, the same text, just a different route to them. Our full sourcing, including that detail, is on the methodology page.

One check worth stating, because it is what makes this figure trustworthy: the withholding table's threshold and the federal standard deduction are not obviously the same quantity — one is set by the Idaho State Tax Commission, the other by the IRS. But for a single filer and for a married couple filing jointly, they land on the identical numbers for 2026, $16,100 and $32,200, which is consistent with Idaho's own tax form: Form 40 starts from your federal adjusted gross income and then applies a standard deduction that Idaho sets to match the federal one for those two statuses. Head of household is the exception: the federal standard deduction for that status is $24,150 for 2026, but Idaho's withholding table still groups head of household with the single filer's $16,100, not its own, larger federal figure — a choice the table makes explicitly, not a rounding artifact. For tax year 2025, the comparable single/joint threshold was $4,811 single and $9,622 joint — far lower, because 2026 is the first year the withholding table lines up the threshold with the larger, OBBBA-enhanced federal standard deduction rather than the smaller indexed figure Idaho Code 63-3024 sets on its own.

What the calculator deliberately does not do: it does not itemize deductions, model Idaho's now-expired child tax credit, handle multiple jobs, or account for health insurance premiums and other employer benefit deductions.

Idaho hourly paycheck: what your rate is worth after tax

Why we ask your hours instead of assuming 2,080

Most hourly calculators multiply your rate by 2,080 and call it a year. That is 40 hours a week for 52 weeks, which describes a full-time salaried schedule rather than most hourly work. If you work 32 hours a week, or 45 with overtime, the assumed figure is wrong before any tax is applied. The calculator above asks for your hours and uses them.

What $20 an hour comes to in Idaho

At 40 hours a week, $20 an hour is $41,600 a year gross. After federal tax, Social Security, Medicare and Idaho’s flat 5.3%, that leaves about $34,254 a year, or $2,854.51 a month. Your real hourly rate — what an hour of work actually puts in your account — is $16.47. Idaho’s share of it is $1,351.50 for the year.

What $25 and $30 an hour come to

$25 an hour is $52,000 gross and about $42,059 after tax, a real rate of $20.22. $30 an hour is $62,400 gross and about $49,865 after tax, a real rate of $23.97. Because Idaho’s rate is flat, there is no bracket to cross at higher pay — every extra dollar above the threshold is taxed at the same 5.3%.

Overtime, tips and shift differentials

Idaho taxes overtime, tips and shift differentials at the same flat 5.3% as the rest of your pay, once you are past the threshold. The common complaint that “overtime is taxed more” is a federal effect: extra pay is withheld against a higher federal bracket, and nothing about Idaho’s single rate changes.

Idaho take-home pay by hourly rate

Single filer, 40 hours a week (2,080 hours a year), 2026 rates.

What this calculator does not cover

This tool models federal income tax, Social Security, Medicare and the payroll programs your state actually runs — nothing more. It deliberately leaves out:

• Itemized deductions and federal tax credits — the Child Tax Credit, the Earned Income Tax Credit, education credits. The engine always applies the standard deduction; there is no itemizing path.
• A second job, self-employment income or 1099 pay. Every dollar you enter is treated as one employer’s W-2 wages, taxed at the employee share of Social Security and Medicare — not the self-employment tax a 1099 worker actually owes.
• Pre-tax benefits other than the 401(k) field — health insurance premiums, an HSA or FSA, commuter benefits. The only amount taken out before tax is the percentage you enter for a 401(k).
• Local taxes — city income tax, county tax, or a school-district tax. Where a state levies one, our methodology page says so by name; this calculator does not add that line, with two exceptions: the Indiana and Maryland calculators add the local income tax for the county you choose.
• Overtime premiums. An hourly rate is multiplied by the hours you enter; it does not add a time-and-a-half rate for hours worked past 40 in a week.
• Wage garnishments or court-ordered deductions — child support, a wage levy. Your result assumes none exist.
• The Additional Medicare Tax, at the single-filer threshold. The 0.9% surtax above $200,000 is applied at that one figure for every filing status, the way an employer actually withholds it — not the higher threshold a married couple filing jointly may end up owing at tax return time.
• Married filing separately, or a qualifying surviving spouse. The calculator only offers single, married filing jointly, and head of household.

None of these are in the estimate. Some of them change what you owe or get back when you file, and a calculator cannot ask for everything they depend on. See why your pay stub will differ for the details.

Key facts that affect your take-home pay in Idaho

Idaho's rate is flat, but the threshold is not a rounding error

There is no bracket to climb in Idaho: 5.3% applies to every dollar above the threshold, whether you earn $30,000 or $300,000. What changes your Idaho tax bill is not a rate you cross but the size of the threshold itself, and for 2026 that threshold is set to match the federal standard deduction — $16,100 single, $32,200 married filing jointly. On $25,000 the state takes $471.70, an effective state rate of 1.89%. On $75,000 it takes $3,121.70, or 4.16%. Even on $250,000 it is only 4.96%, because the threshold is a fixed dollar amount that shelters a shrinking share of a larger income.

Head of household shares the single threshold, not the joint one

This is what most sets Idaho apart from the other flat- or near-flat-rate states on this site. The 2026 withholding table lists two columns: “Single Persons Including Head of Household” at $16,100, and “Married Persons” at $32,200. A head of household is grouped with the single filer, not with the married couple — the opposite grouping from what the prior year's annual return worksheet used. On a $75,000 salary that makes a head of household’s Idaho tax $3,121.70, identical to a single filer’s $3,121.70, rather than the lower $2,268.40 a joint filer pays.

The Idaho Child Tax Credit no longer applies

Idaho Code section 63-3029L created a nonrefundable $205-per-child credit, separate from the federal child tax credit, with its own built-in end date of January 1, 2026. The Idaho State Tax Commission confirmed the sunset in the same release that announced the 2026 withholding tables, and the withholding allowance for it has been removed from those tables. If you are budgeting around an Idaho child credit for 2026, it is not there.

Your employer cannot deduct unemployment insurance from your pay

Some states take an employee contribution for unemployment coverage; Washington is the example on this site, where paid family leave and long-term care both come off the stub. Idaho does not: the Idaho Department of Labor’s handbook for businesses states it directly, State Unemployment Tax (SUTA) is an employer-paid tax paid into the unemployment insurance trust fund. The only state line we found on an Idaho pay stub is income tax withholding.

Your 401(k) contribution does reduce your Idaho tax

Idaho’s own tax form starts from your federal adjusted gross income — Form 40, line 7, pulled straight from federal Form 1040 — and an elective deferral to a 401(k) or 403(b) is already excluded from that figure. On $75,000 with 6% going in, your Idaho tax falls by $238.50 a year. The rule is not universal: a Pennsylvania worker making the same contribution on the same salary sees their state tax fall by $0.00 — nothing at all.

Social Security stops, Medicare does not

Social Security is withheld at 6.2% until your wages reach $184,500 in 2026, then stops for the rest of the year. Medicare has no ceiling at all: 1.45% on every dollar, plus an extra 0.9% on wages above $200,000. This is why take-home pay rises unevenly through the year for high earners — the paycheck after you cross the Social Security wage base is visibly larger.

Common mistakes people make

Assuming head of household gets the married threshold

It does not, at least not for 2026 withholding. The instinct makes sense — on this site, filing as head of household usually lands between single and married filing jointly — but Idaho’s 2026 withholding table explicitly groups head of household with single, both at $16,100. Assuming the married threshold applies overstates a head of household’s take-home pay by treating $16,100 of income as untaxed when it is not.

Using the 2025 threshold

$4,811 was the tax-year-2025 annual-return figure for a single filer, not the 2026 withholding figure. Using it for 2026 taxes $11,289 of income that should be untaxed, overstating a $75,000 salary’s Idaho tax bill by a wide margin. If a page shows a threshold near $4,800 for 2026, it is showing last year's return figure, not this year's withholding table.

Expecting the Idaho Child Tax Credit

It expired on January 1, 2026. A $205-per-child figure that shows up in an older search result or a prior year's guide no longer applies to tax year 2026, and this calculator does not add it back.

Expecting the calculator to match the paystub to the dollar

It will not, and no calculator can. Idaho’s own withholding table is a per-paycheck approximation; your actual bill runs through the full annual worksheet on Form 40, where your real deductions and any credits you qualify for are counted. Health insurance premiums and other pre-tax benefit deductions come out before tax and are not modeled here, a second job changes the federal withholding picture, and your employer withholds from the Idaho Form ID W-4 you actually filed. Read why your pay stub will differ for the rest.

Example calculation

A single filer earning $75,000 in Idaho in 2026, with no retirement contribution:

• Federal taxable income: $75,000 − federal standard deduction of $16,100 = $58,900
• Federal income tax: $7,670.00
• Social Security: $75,000 × 6.2% = $4,650.00
• Medicare: $75,000 × 1.45% = $1,087.50
• Idaho taxable wages: $75,000 − $16,100 threshold = $58,900
• Idaho tax: $58,900 × 5.3% = $3,121.70
• Total withheld: $16,529.20
• Take-home pay: $58,470.80 a year, or $4,872.57 a month
• Effective tax rate: 22.0%

Frequently asked questions

Compare with other states

The same $75,000 salary, single filer, 2026 rates, state layer only:

• Montana — $58,716 take-home, an effective rate of 21.7%. A Montana worker keeps $245.10 more than an Idahoan on the same salary.
• Nevada — $61,593 take-home, an effective rate of 17.9%. A Nevada worker keeps $3,121.70 more than an Idahoan on the same salary.
• Utah — $58,255 take-home, an effective rate of 22.3%. A Utah worker keeps $215.80 less than an Idahoan on the same salary.
• Washington — $60,552 take-home, an effective rate of 19.3%. A Washington worker keeps $2,081.33 more than an Idahoan on the same salary.

Idaho borders four states already on this site, and the spread among them is wide. Nevada and Washington have no state income tax at all, which is why their workers keep more of the same salary despite Washington’s small paid-leave and long-term-care deductions. Utah’s flat 4.45% is a lower headline rate than Idaho’s 5.3%, and yet a Utah worker on this salary pays $3,337.50 to the state against Idaho’s $3,121.70 — because Utah subtracts nothing before applying its rate, while Idaho shelters $16,100 first. What is taken out before the rate applies matters as much as the rate itself. Montana, with a two-rate system and the same federal-sized deduction as Idaho, comes in close, at $2,876.60.

Sources

The federal figures on this page — the brackets, the standard deduction and FICA — are read from the official documents below. The Idaho figures are read from the state’s own law and withholding guides, which we quote and date on our methodology page: Idaho does publish its own document, but tax.idaho.gov and legislature.idaho.gov time out on every automated connection attempt from this machine, though the same figures were read from their Internet Archive snapshots, so we have no link from this machine that we have verified ourselves. If one of our numbers disagrees with one of theirs, they are right and we have a defect to fix — tell us.

The federal documents these figures are read from

• IRS — 2026 inflation adjustments (Rev. Proc. 2025-32) — the federal brackets and the $16,100 standard deduction.
• IRS — Topic no. 751, Social Security and Medicare withholding rates — the 6.2% and 1.45% rates and the 0.9% Additional Medicare Tax.
• SSA — Contribution and benefit base — the $184,500 Social Security wage base.

All links checked September 30, 2026. One source is named on this page but not linked: tax.idaho.gov and legislature.idaho.gov time out on every automated connection attempt from this machine, though the same figures were read from their Internet Archive snapshots, so we have no link we have checked ourselves and we will not publish one we have not. The figures and the dates we read them are on our methodology page.

Related reading

• Paycheck calculators by state — the full index, including which states have no income tax at all.
• Utah paycheck calculator — the other flat-rate state on this site, and the only one that works through a credit instead of a threshold.
• Methodology — the exact formula, every 2026 figure with its official source, and what these calculators deliberately do not model.
• Why your pay stub will differ — pre-tax deductions, credits and W-4 settings, and how much difference is normal.