Idaho Bonus Pay Tax Calculator

2026 Idaho bonus withholding

Idaho Bonus Pay Tax Calculator

Estimate an Idaho employee's net bonus using the state's 5.3% separately issued supplemental method or current regular-pay percentage table, 2026 federal methods, payroll-tax caps, employer costs, and net-to-gross planning.

Calculate a full Idaho paycheck Explore TimeTrex payroll

Bonus inputs

Use gross-to-net for a planned bonus or net-to-gross when a take-home amount was promised. This estimates one taxable cash bonus for a W-2 employee; use a full paycheck calculation for regular or periodic wages.

Gross bonus amount Enter the taxable bonus to be paid.

Federal withholding method

Payment presentation Federal eligibility and Idaho payment treatment are resolved separately. Idaho's 5.3% option is for a separately issued payment; a payment issued with regular wages uses the regular Idaho percentage computation.

Regular wages had federal income tax withheld

The optional 22% federal method generally requires federal income tax to have been withheld from regular wages in the current or immediately preceding year.

Regular pay frequency Used by federal aggregate withholding and the Idaho combined-pay calculation. The active Idaho table publishes daily/miscellaneous, weekly, biweekly, semimonthly, monthly, and annual rows.

YTD Social Security wages from this employer Used only for the 2026 $184,500 Social Security wage-base check.

YTD Medicare wages from this employer Used for the employer's $200,000 Additional Medicare withholding threshold.

YTD supplemental wages before bonus Include 2026 supplemental wages paid by this employer and businesses under common control for the federal $1 million test.

Regular wages for the reference pay period Used by federal aggregate withholding and by Idaho combined-pay treatment unless an actual Idaho baseline is entered.

Federal W-4 settings

Federal filing status

Use higher W-4 Step 2 checkbox tables

Annual credits from W-4 Step 3

Annual other income from W-4 Step 4(a)

Annual deductions from W-4 Step 4(b)

Extra federal withholding per regular check

Extra federal withholding in aggregate mode Added only to the aggregate result; it never changes the prescribed 22% or 37% rates.

Actual federal withholding on reference wages Aggregate mode subtracts this actual amount when provided. If the federal eligibility box is clear and this is blank, the baseline defaults to $0.

Idaho withholding settings

Idaho withholding profile Profiles are documentation prompts, not eligibility decisions. Current Tax Commission web guidance still describes a nonresident-under-$1,000 exception, but current Rule 871 omits that threshold; the review preset must be confirmed with the agency before use.

Idaho income-tax withholding applies

Clear only with current documentation. Idaho has its own Form ID W-4, and exempt claims must be renewed for each applicable year.

Idaho bonus withholding method Automatic uses 5.3% only when the payment is issued separately. A flat request on either same-check presentation falls back to the combined-pay method and is visibly flagged.

Idaho filing status Statuses A and C use the single/head-of-household threshold; status B uses the married threshold.

Form ID W-4 allowances The current table subtracts the printed per-period Idaho Child Tax Credit allowance before applying the threshold and 5.3% rate.

Idaho-taxable bonus percentage For services inside and outside Idaho, use a supportable workday, hour, mileage, or commission allocation. Keep this separate from the UI allocation below.

Daily/miscellaneous days covered Used only with Daily or miscellaneous frequency; the printed daily allowance and threshold are multiplied by this count.

Actual Idaho withholding on regular wages Optional. The combined-pay estimate otherwise subtracts a modeled regular-wage baseline using the same status, allowances, frequency, and allocation.

Manual verified Idaho base withholding Used only with Manual. Enter the verified state amount before any bonus-specific additional withholding.

Additional Idaho withholding on this bonus Optional amount applied once only when payroll records support adding it to this bonus payment. Do not automatically duplicate Form ID W-4 line 2 across aggregate baselines.

Current table basis. Idaho's current computing page still links the April 28, 2025 percentage table. This calculator uses its exact printed thresholds and allowance amounts, rounds regular percentage calculations to whole dollars, and rounds the separate 5.3% product to cents because the agency does not expressly extend its whole-dollar instruction to that flat supplemental formula.

Employer cost estimate settings

Idaho UI employer status New employers generally use the standard rate for at least six calendar quarters. Reimbursing employers repay benefit charges rather than using this percentage estimate.

YTD Idaho UI wages before bonus

Idaho UI wage base The Idaho Department of Labor's 2026 rate array sets a $58,300 taxable wage base.

Employer's assigned total Idaho UI rate Enter the employer's assigned total rate. The 2026 array runs from 0.208% to 5.400%; the 1.000% standard total already includes its 0.030% workforce-development component.

Idaho UI-taxable bonus percentage This affects employer cost only. Idaho UI is employer-funded and is never deducted from employee take-home.

YTD FUTA wages before bonus

Estimated net FUTA rate Defaults to 0.6% on the first $7,000 when the full state credit applies. Confirm timely state payments and any final credit reduction.

Estimated net bonus

Federal flat method with Idaho 5.3% separate-payment withholding.

Net bonus $0.00 Tax withholding estimate updates as inputs change.

Gross bonus$0.00

Total withheld$0.00

Effective withholding0.00%

Employer cost estimate$0.00

Withholding line	Amount

Federal method comparison

Method pair	Net bonus	Total withheld

How the 2026 Idaho bonus estimate works

Independent federal and Idaho methods

Model federal 22% or aggregate withholding separately from Idaho's payment-based choice: 5.3% for a separately issued bonus or the regular percentage computation for combined pay.

Exact current Idaho table

Use status A/B/C, the printed per-period allowance, the matching zero-withholding threshold, 5.3%, and whole-dollar rounding for regular percentage calculations.

Employee and employer costs separated

Test FICA caps, employer-only Idaho UI, and FUTA with independent wage-base inputs so employer taxes never reduce take-home.

This is a 2026 planning estimate for an ordinary taxable cash bonus paid to a W-2 employee. Pretax benefits, wage exclusions, prior same-period supplemental pay, multiple employers, common-paymaster or successor rules, multistate sourcing, exemption documentation, actual UI notices, and payroll-system treatment can change the paycheck. Withholding is not final income-tax liability.

Idaho bonus withholding FAQ

Does Idaho have a flat bonus withholding rate?

Yes for a separately issued supplemental payment: multiply the Idaho-taxable amount by 5.3%. A bonus issued with regular wages uses the regular Idaho withholding computation.

What if the bonus is paid with regular wages?

Treat the total as one wage payment. To show the part attributable to the bonus, this estimator subtracts the regular-only table result from the combined table result.

Which Idaho table is current?

The current Tax Commission computing page still links the April 28, 2025 percentage table. No newer 2026 table was posted when checked July 28, 2026.

How do ID W-4 allowances work?

The calculator subtracts the table's exact per-period allowance amount, then applies the status A/C or B threshold and 5.3% rate. Regular percentage results round to whole dollars.

How are multistate bonuses allocated?

Current Rule 871 allows a reasonable Idaho-service allocation using workdays, hours, mileage, or commissions. The allocation control applies before Idaho tax is computed.

Is the nonresident $1,000 threshold settled?

No. The Tax Commission's live web guide still describes it, but current Rule 871 omits it. The calculator offers only a review preset and tells the employer to confirm the treatment.

Does Idaho unemployment tax reduce the bonus?

No. UI is employer-funded. The employer panel applies the assigned total rate only to wages still inside the 2026 $58,300 wage base.

Are local wage taxes or paid-leave deductions included?

No Idaho local wage-withholding or statewide employee leave contribution was identified in the reviewed official employer-tax inventory. Both display as $0 and remain review items for unusual facts.

Can this calculator gross up a promised net bonus?

Yes. Net-to-gross mode solves across federal methods, Idaho whole-dollar combined calculations, the Social Security cap, and the Additional Medicare threshold.

Official sources checked

Primary government sources and the TimeTrex-owned CTA were checked July 28, 2026. Recheck the live Idaho computing page, active percentage table, current Form ID W-4 or ID-MS1, sourcing facts, and the employer's assigned UI notice before production payroll.

Idaho State Tax CommissionComputing Withholding

Idaho State Tax CommissionIncome You Must Withhold On

Idaho State Tax CommissionTable for Percentage Computation Method of Withholding

Idaho State Tax CommissionWithholding tables updated for 2025

Idaho State Tax CommissionForm ID W-4

Idaho State Tax CommissionIncome You Do Not Have to Withhold On

Idaho State Tax CommissionWithholding - Types of Employees

Idaho Administrative RulesIDAPA 35.01.01, Rules 270 and 871

Idaho State Tax CommissionMilitary and Form ID-MS1 Guidance

Idaho State Tax CommissionWithholding Forms Catalog

Idaho Department of Labor2026 Rate Class Array

Idaho Department of LaborLive Unemployment Insurance Tax Rates

Idaho Department of LaborUnemployment Insurance Program Overview

Idaho Department of LaborEmployer UI Handbook

Internal Revenue ServicePublication 15 (Circular E), 2026

Internal Revenue ServicePublication 15-T, 2026

Social Security AdministrationContribution and Benefit Base

Internal Revenue ServiceFUTA Credit Reduction

TimeTrexIdaho Payroll Tax Calculator

TimeTrexPayroll Software

Move from a bonus estimate to a complete Idaho paycheck

Estimate regular wages and the full paycheck picture with TimeTrex's free Idaho Payroll Tax Calculator, but recheck its partly 2025-led explanatory copy before relying on it for 2026. Or connect approved earnings, time records, and payroll in one workflow.

Calculate a full Idaho paycheck Explore TimeTrex payroll

Disclaimer: This calculator provides 2026 payroll estimates for regular taxable cash bonuses paid to W-2 employees based on standard federal withholding guidelines and active Idaho Tax Commission percentage tables. Actual paycheck amounts may vary due to specific employee W-4 elections, pretax deductions, wage exclusions, prior supplemental earnings within the same period, multi-state tax sourcing, or specific employer unemployment insurance rates. These calculations are intended solely for planning and illustrative purposes and do not constitute formal tax, legal, or accounting advice; always verify official tax guidance, employee documentation, and payroll records before processing production payroll.

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Disclaimer: The content provided on this webpage is for informational purposes only and is not intended to be a substitute for professional advice. While we strive to ensure the accuracy and timeliness of the information presented here, the details may change over time or vary in different jurisdictions. Therefore, we do not guarantee the completeness, reliability, or absolute accuracy of this information. The information on this page should not be used as a basis for making legal, financial, or any other key decisions. We strongly advise consulting with a qualified professional or expert in the relevant field for specific advice, guidance, or services. By using this webpage, you acknowledge that the information is offered “as is” and that we are not liable for any errors, omissions, or inaccuracies in the content, nor for any actions taken based on the information provided. We shall not be held liable for any direct, indirect, incidental, consequential, or punitive damages arising out of your access to, use of, or reliance on any content on this page.

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Idaho Bonus Pay Tax Calculator