Idaho Payroll: Employer Tax and Software Guide

Idaho is the state small employers assume will be easy, and most of that assumption holds up. One flat income tax rate. No local income tax. No paid family leave premium, no state disability contribution, no state sick leave mandate. A minimum wage that has not moved on its own in years because the statute simply tracks the federal floor.

What the simplicity hides is where the money and the deadlines actually sit. The unemployment insurance wage base climbed to $58,300 for 2026, which is high for the region and turns a rate that looks trivial into a real per-employee cost. Your rate is not something you pick; it comes out of a reserve ratio array computed on a July to June fiscal year and mailed to you in December. And the wage payment statutes carry a provision that can compress a departing employee's final check into 48 hours on nothing more than a written request.

This guide covers what Idaho requires from employers as of August 2026, the obligations that registering for a withholding account does not cover, and how 10 payroll providers price the work at 10, 25, and 50 employees.

What Idaho requires from employers

Three state obligations sit on top of federal payroll: income tax withholding, unemployment insurance, and workers compensation coverage. That is a shorter list than most states produce, and each one has a mechanic worth understanding before you buy software.

State income tax withholding

The rate is a flat 5.3 percent on taxable income. House Bill 40, signed in March 2025, cut it from 5.695 percent retroactively to January 1, 2025 and set the individual and corporate rates at the same figure. No Idaho city or county levies an income tax on top of it, so the state rate is the whole state-level story on the employee side of the stub.

Employers must keep a federal Form W-4 on file for every employee, and the Idaho State Tax Commission strongly encourages employees to complete the current Form ID W-4 for state withholding. Three calculation methods are approved: Percentage Computation, Annualized Wage, and Wage Bracket. Separately issued supplemental payments such as bonuses and commissions are withheld at a straight 5.3 percent, or combined with regular wages and treated as one payment.

How an Idaho paycheck calculation works

An Idaho payroll calculator runs the same four steps, and the steps are more useful than the number it returns. Gross pay for the period comes first. Then federal withholding from the federal W-4, plus Social Security and Medicare. Then Idaho withholding. Then the employer-side taxes that never appear on the employee's stub at all.

The Idaho step is where the flat rate stops being quite so flat. The Tax Commission tables build the standard deduction into a zero bracket, so nothing is withheld until annualized wages clear that threshold and 5.3 percent then applies to the excess. The published example for a married employee paid $1,000 a week annualizes to $52,000, takes 5.3 percent of the amount over $32,000, and lands at $1,060 for the year or $20 a week.

Deposit schedules and returns

The Tax Commission assigns filing frequency from how much you withhold, and Idaho runs four tiers rather than the usual three.

Form 967 reconciles the withholding account and transmits W-2s regardless of which Form 910 cycle you are on. Forms 1099 carrying Idaho withholding are due the last day of February. A zero payment form is required for any period in which you withheld nothing, which is the rule seasonal employers most often trip over during a quiet quarter.

Unemployment insurance

Unemployment insurance is an employer-only cost in Idaho; nothing comes out of the employee. The Idaho Department of Labor gives every new employer other than a cost-reimbursement employer the same standard rate for at least the first six calendar quarters. The department's rate class array effective January 1, 2026 puts the taxable wage base at $58,300, up from $55,300 in 2025 and $53,500 in 2024.

Two details in that table are easy to miss. The posted rate already bundles a workforce development component, so the number on your Notice of Tax Rate is the whole employer cost rather than a base you then add surcharges to. And the administrative rate is set to zero for every class in 2026, which is a saving the state applies quietly rather than something you apply for.

Rates are computed on a July to June fiscal year and assigned each calendar year, with the notice mailed in December. Qualifying for anything below the standard rate requires a positive reserve ratio, all reports filed, all money due paid before September 30, and at least six calendar quarters of participation before the June 30 computation date.

Registration, workers compensation, and new hire reporting

Get a federal EIN first, then register the business and any assumed business names with the Secretary of State. The Idaho Business Registration application then opens the withholding account with the Tax Commission and produces the permits required by the Department of Labor and the Industrial Commission in a single pass.

Workers compensation coverage is required for employers with one or more full-time, part-time, seasonal, or occasional employees unless specifically exempt, and the Industrial Commission requires it to be in place before the first employee is hired. New hires are reported to the Department of Labor within 20 days of the date of hire, and rehires are reportable when the previous employment ended at least 60 days earlier.

The local layer that state registration does not cover

Idaho has no local income tax, no city payroll tax, and no city minimum wage, so the municipal layer that complicates Colorado or New Jersey does not exist here. What registering a withholding account does not cover is a different set of obligations entirely: an insurance policy, two wage payment statutes, and six state borders.

Workers compensation is a purchase, not a registration

The Industrial Commission permit that comes out of the Idaho Business Registration process is not coverage. Coverage is a policy bought from one of the private carriers authorized to write workers compensation in Idaho or from the State Insurance Fund, which is a quasi-governmental entity rather than a state agency. An employer who lets coverage lapse and then has an injury can be personally liable for all benefits, medical and wage loss both, that the Workers' Compensation Law would have provided.

Payroll software does not buy the policy either, though several providers place coverage through partner carriers and bill premium off actual payroll rather than an annual estimate.

Two wage payment statutes with real deadlines

Idaho Code section 45-608 sets the pay frequency floor and section 45-606 sets the separation deadline. Neither is a policy question, and the second one is the one that produces claims.

Two things stand out against other states. Idaho applies the same separation deadline whether the employee quit or was discharged, and monthly pay is lawful, so the binding constraint is the 15-day lag rather than the frequency.

One wage floor, and no city can move it

Idaho Code section 44-1502 sets the minimum wage at $7.25 and provides that the amount conforms to and tracks with the federal minimum wage. There is no state indexing formula and no scheduled increase; the number moves only when Congress moves the federal floor.

The tip credit mechanic is the standard one: if tips actually received plus the $3.35 direct wage do not reach $7.25, the employer covers the difference, and the burden of proving the tip total sits with the employer. Tips shared out under a pooling arrangement do not count as received by the employee who passed them along.

The preemption in subsection (4) is genuinely useful. Because no Idaho city can set its own rate, a payroll platform can key the wage floor to the company rather than to each worksite, which eliminates a class of underpayment error that costs multi-site employers real money in Washington and other home-rule states.

Six borders and a very different neighborhood

Idaho touches Washington, Oregon, Nevada, Utah, Wyoming, and Montana, and the payroll rules on the other side of those lines are not similar. Washington has no income tax but does have paid family and medical leave premiums and a long-term care payroll deduction. Oregon has graduated income tax, its own paid leave program, and a statewide transit tax. Nevada and Wyoming have no personal income tax at all.

For a company in Coeur d'Alene or Lewiston, a hire 20 minutes away is a different tax jurisdiction with its own registration, filings, and wage base. That makes multi-state handling the most valuable feature an Idaho employer can shop for, and it is priced very differently below.

10 payroll providers for Idaho employers compared

Every provider below files Idaho withholding on Form 910, reconciles on Form 967, and files quarterly unemployment insurance wage reports. The differences that matter here are what a second state costs, how quickly an off-cycle payment can be funded, and whether the price is published at all.

OnPay

One plan at $49 per month plus $6 per employee, with every feature included and no tiers to climb. Tax filing covers all 50 states with no multi-state surcharge, and year-end W-2 and 1099 filing sits in the base price rather than being billed separately. For an Idaho employer with staff drifting across the Washington or Utah line, that no-surcharge policy is worth more than the headline base fee difference against cheaper competitors.

Gusto

The most common first payroll purchase for US small businesses. Tax filing is automatic, the interface is pleasant, and pricing is published. Simple runs $49 per month plus $6 per employee following a base increase in March 2026.

The catch for Idaho employers is that Simple covers single-state payroll only. One hire in Washington, Oregon, Utah, Nevada, Wyoming, or Montana moves you to Plus at $80 plus $12 per employee. Given how many Idaho companies sit within an hour of a border, model the Plus number rather than the Simple number if a cross-border hire is plausible inside the next year.

Patriot Software

The cheapest legitimate full-service payroll available. Full Service is $37 per month plus $5 per employee and includes federal, state, and local tax filing plus new hire reporting. Basic is $17 plus $4 if you file taxes yourself, which for an Idaho employer means running Form 910 on your assigned cycle, filing Form 967 with W-2s by the last day of January, and submitting the 20-day new hire reports by hand.

Additional state filings cost $12 per month each. For a company entirely inside Idaho that surcharge never fires, which is why Patriot stays the price leader at every headcount on the cost table below.

SurePayroll

Owned by Paychex and aimed at very small employers and household employers. Full Service is $29 per month plus $7 per employee, with a flat $9.99 monthly multi-state fee regardless of how many states are involved. For an Idaho business with a handful of people spread across the Washington and Utah lines, that flat structure beats per-state pricing outright.

QuickBooks Workforce Payroll

Formerly QuickBooks Payroll, now renamed. Core is $50 per month plus $6.50 per employee. The reason to pick it has always been the same: if your books already live in QuickBooks Online, payroll entries reach the general ledger without an export step. Per-employee pricing rose across all tiers on July 1, 2026.

ADP RUN

ADP processes payroll for roughly one in six American workers and has the deepest tax compliance engine in the category. For an Idaho employer the practical argument is cross-border: a company with people in Idaho and Washington is running two entirely different state systems, and large platforms absorb that as routine rather than as a project.

The cost is opacity. ADP does not publish RUN pricing; third-party estimates put Essential near $79 per month plus $4 per employee, but every quote is individual. Contracts typically run a year with automatic renewal and a 30 to 60 day cancellation window.

Paychex Flex

Paychex competes with ADP on the same terms: a service relationship rather than a software subscription, with a named contact at higher tiers. Pricing is quote-only, and quarterly administrative charges appear regularly in customer reports. Worth a quote if you would rather call a person when a Notice of Tax Rate arrives in December than work out why your rate class moved.

Paylocity

Paylocity sits between small-business payroll and full HCM, aimed at companies that have outgrown basic payroll but do not want enterprise complexity. It publishes detailed per-state tax facts including Idaho, and the HR module covers performance, learning, and engagement alongside payroll. Pricing is quote-based, and implementation is a project rather than a signup.

Rippling

Rippling sells a unified employee record where payroll, HR, and IT provisioning share one data model. The core platform is $35 per month plus $8 per employee, with payroll as a separate module. Real-world all-in costs land between $25 and $45 per employee per month once you assemble a working configuration.

Justworks

Two products under one name. Payroll is $50 per month plus $8 per employee and is straightforward software. PEO Basic at $79 per employee per month is a co-employment arrangement giving a small Idaho business access to benefits priced off a much larger risk pool, which matters more in a state where the small-group market is thin outside the Treasure Valley.

What each provider actually costs an Idaho employer

The table below models published rates at three headcounts, plus what happens when a second state enters the picture. That last column deserves more weight in Idaho than almost anywhere, because the state borders six others and none of them run payroll the way Idaho does.

For a business entirely inside Idaho, Patriot stays cheapest at every headcount, and at 50 employees it costs less than several competitors do at 25. The moment a second state appears, the ranking reshuffles. Gusto Simple is competitive until one border hire forces the Plus tier, at which point a 25-person payroll goes from $199 to $380 per month, while SurePayroll adds a flat $9.99 and OnPay adds nothing at all.

Software price is also not the whole Idaho number. Unemployment insurance at the standard 1.000 percent rate on a $58,300 wage base is up to $583 per employee per year, and a deficit-rated employer at 5.400 percent pays up to $3,148 for the same person. At 25 people that gap dwarfs every subscription line on the table.

Choosing a payroll provider for Idaho

Four questions separate providers that will work here from providers that will quietly generate problems.

One item sits outside the payroll engine entirely. Every Idaho new hire needs a federal I-9 and W-4, a Form ID W-4, a voluntary direct deposit authorization that the employee can revoke at any time, and a new hire report filed within 20 days.

Before you choose

FirstHR does not process payroll, file payroll taxes, or administer benefits. We do not calculate withholding, we do not move money, and we do not file Form 910, Form 967, or a quarterly unemployment insurance wage report.

Every provider above does something we do not. If running payroll is the problem in front of you, one of them is the answer, and the honest recommendation on this page is to buy from that list rather than from us.

What we handle is the layer that feeds payroll: onboarding workflows, e-signatures on I-9s and offer letters, employee records, and HR document management for small US teams at a flat $98 to $198 per month. Idaho puts a fair amount of weight on that layer, because the state form, the direct deposit authorization, and the 20-day new hire report all have to exist before the first run is anything other than a guess.

If the recurring problem is that the Form ID W-4 never got signed, the direct deposit authorization is missing, and nobody is sure whether the new hire report went out, that is a document collection failure rather than a payroll processing failure, and it is the kind of gap we built for.

Frequently Asked Questions

What is the Idaho income tax rate for payroll withholding?

A flat 5.3 percent, with no brackets and no local income tax anywhere in the state. House Bill 40, signed in March 2025, cut the rate from 5.695 percent retroactively to January 1, 2025 and aligned individual and corporate rates. Separately issued supplemental payments such as bonuses are withheld at the same 5.3 percent.

Is Form ID W-4 required for Idaho employees?

A federal Form W-4 is required on file for every employee, and the Tax Commission strongly encourages employees to complete the current Form ID W-4 for state withholding. Idaho allowances are currently valued at zero because the Idaho Child Tax Credit sunsetted, so the number of allowances claimed on the state form does not change the withholding.

What is the Idaho unemployment insurance taxable wage base?

$58,300 per employee, up from $55,300 in 2025 and $53,500 in 2024, per the Idaho Department of Labor rate class array effective January 1, 2026. Unemployment insurance is an employer-only tax in Idaho, so nothing is withheld from the employee for it.

What is the Idaho SUI rate for a new employer?

The standard rate of 1.000 percent, made up of 0.97000 percent unemployment insurance contribution plus 0.03000 percent workforce development, with the administrative rate at zero for 2026. New employers hold that rate for at least six calendar quarters before the Department of Labor assigns an experience-based rate class.

How often does an Idaho employer file withholding returns?

Semimonthly at $25,000 or more withheld per month, monthly below $25,000 a month but above $750 a quarter, quarterly at $750 or less each quarter, and annually below $750 a year. Payments and returns use Form 910, and Form 967 reconciles the account with W-2s by the last day of January.

What is the Idaho minimum wage?

$7.25 per hour under Idaho Code section 44-1502, which provides that the state rate conforms to and tracks with the federal minimum wage. There is no state indexing and no scheduled increase. The tipped direct wage is $3.35 with the employer covering any shortfall, and employees under 20 may be paid $4.25 for their first 90 consecutive calendar days.

Can an Idaho city set its own minimum wage?

No. Idaho Code section 44-1502(4) preempts every political subdivision from establishing a minimum wage higher than the state figure, so Boise, Meridian, and every other jurisdiction sit on the same $7.25 floor. A payroll system can safely key the wage floor to the company rather than to each worksite.

How often must Idaho employees be paid?

At least once during each calendar month on regular paydays designated in advance, under Idaho Code section 45-608. Monthly pay is lawful. The binding constraint is that the end of the pay period must be no more than 15 days before the payday, and if a payday falls on a nonworkday, payment moves to the preceding workday.

When is a final paycheck due in Idaho?

By the earlier of the next regularly scheduled payday or 10 days after the separation, weekends and holidays excluded, and the same deadline applies whether the employee quit or was discharged. A written request from the employee for earlier payment shortens it to 48 hours from receipt, weekends and holidays excluded.

Does Idaho have paid family leave or state disability payroll contributions?

No. Idaho has no state paid family and medical leave program, no state temporary disability insurance, and no statewide paid sick leave mandate for private employers. There is also no local income tax or city payroll tax, which is why an Idaho payroll run is shorter than one in Washington, Oregon, or Colorado.

How do I register a business for Idaho payroll taxes?

Get a federal EIN, register with the Secretary of State, then complete the Idaho Business Registration application, which opens the withholding account with the Tax Commission and produces the Department of Labor and Industrial Commission permits in one pass. An Idaho withholding account number is not transferable between owners.

How long does an Idaho employer have to report a new hire?

Twenty days from the date of hire, reported to the Idaho Department of Labor, with rehires reportable when the previous employment ended at least 60 days earlier. Reports go through the employer portal, by mail, or by fax on the department's new hire reporting form.

What does an Idaho payroll calculator actually compute?

Gross pay, then federal withholding plus Social Security and Medicare, then Idaho withholding at 5.3 percent above the standard deduction threshold built into the state tables, then the employer-side taxes that never appear on the stub. That last step is federal unemployment tax plus Idaho unemployment insurance on the first $58,300 of wages, and it is where budgeting usually goes wrong.

How much does payroll software cost for an Idaho small business?

At 10 employees, published July 2026 rates run roughly $87 for Patriot Full Service, $99 for SurePayroll, $109 for OnPay or Gusto Simple, $115 for QuickBooks Core, and $130 for Justworks Payroll. At 50 employees the same plans land between $287 and $450. Because Idaho borders six states, multi-state pricing moves the ranking more than the base fee does.