Quick Answer
Idaho employers withhold income tax at a flat 5.3%. SUI runs 0.208%–5.4% (new employer 1.0%) on a $58,300 wage base. The minimum wage is $7.25/hr (the Idaho rate, which matches the federal minimum). Final paychecks are due on the next regular payday or within 10 days, whichever is sooner. There is no state PFL or SDI program. The high SUI wage base is Idaho's defining payroll cost driver.
Table of Contents
Idaho has a reputation as a low-regulation state for business, and in many respects the payroll environment reflects that. No state paid family leave, no state disability insurance, minimum wage at the federal floor. A recent income tax reform simplified withholding to a single flat rate.
But don't overlook Idaho's SUI wage base. A new employer pays SUI on the first $58,300 of every employee's wages — more than eight times the federal FUTA base of $7,000. For businesses adding staff quickly, this is a real budget item that surprises employers accustomed to states with low bases.
Idaho Payroll at a Glance
| Obligation | Rate / Amount | Wage Base / Limit | Who Pays |
|---|---|---|---|
| SUI | 0.208%–5.4% (new: 1.0%) | $58,300 per employee | Employer only |
| ID Income Tax Withholding | Flat 5.3% | All wages | Employee (withheld by employer) |
| State SDI / PFL | None | — | — |
| Minimum Wage | $7.25/hr (federal) | — | — |
State Unemployment Insurance: The $58,300 Wage Base
Idaho SUI is administered by the Idaho Department of Labor (IDOL). The $58,300 taxable wage base is the defining financial fact of Idaho payroll. It's the employer's primary state-specific cost — and it dwarfs what employers pay in most other states.
SUI Rates for 2026
- New employer rate: 1.0%
- Experienced employer range: 0.208% to 5.4%
- Taxable wage base: $58,300 per employee per year
- Maximum annual cost per employee (new employer at 1.0%): $583.00
- Maximum possible cost per employee (at 5.4%): $3,148.20
The $58,300 Wage Base in Context
To understand what the $58,300 base means in practice, compare it to the federal FUTA base:
| State | SUI Wage Base | New Employer Rate | Max New Employer Cost/Employee |
|---|---|---|---|
| Idaho | $58,300 | 1.0% | $583.00 |
| Federal (FUTA) | $7,000 | 6.0% (0.6% effective) | $42.00 |
Idaho's low rate (1.0% for new employers) partially offsets the high base. An Idaho employer with 10 new employees who each earn at least $58,300 pays approximately $5,830.00 in SUI in year one.
Plan SUI Costs Into Your Idaho Labor Budget
Out-of-state businesses expanding into Idaho sometimes model Idaho payroll costs using their home state's SUI base as a benchmark. That produces a severe undercount. Budget specifically for the $58,300 Idaho wage base in your initial hiring projections.
Quarterly SUI Filing
Idaho SUI returns are filed quarterly through the IDOL employer portal. Deadlines: April 30, July 31, October 31, January 31. Late filing generates a penalty of 10% of tax due per quarter.
State Income Tax: Flat 5.3%
Idaho taxes individual income at a single flat rate of 5.3%.
Withholding: Form ID W-4
Employees complete Idaho Form ID W-4 to declare their withholding allowances. If an employee doesn't provide one, withhold at the zero-allowance rate. Withholding tables are published by the Idaho State Tax Commission and updated when rates change.
Idaho income tax withholding is remitted to the Idaho State Tax Commission through the Taxpayer Access Point (tap.idaho.gov). Filing frequency is assigned by the Tax Commission based on your withholding volume:
- Annual: Withhold less than $750 per year
- Quarterly: Withhold $750 or less each quarter
- Monthly: Withhold more than $750 a quarter but less than $25,000 a month
- Semimonthly: Withhold at least $25,000 a month or at least $300,000 in a 12-month period
Year-end W-2s and annual reconciliation are filed with the Tax Commission by January 31.
Keep Your Withholding Tables Current
If you're using old withholding tables or older payroll software that hasn't been updated, you may be over-withholding. Verify your Tax Commission tables are current.
Minimum Wage
Idaho's state minimum wage is $7.25 per hour, the same as the federal minimum. The $7.25 rate has been unchanged since July 2009.
Local governments in Idaho are preempted from setting higher minimum wages. So $7.25 applies uniformly across the state, from Boise to Coeur d'Alene to rural farming communities.
Tipped Employees
Idaho allows the federal tip credit. Tipped employees can be paid as little as $3.35 per hour in direct wages, with tips making up the difference to $7.25. Idaho's tip credit is $3.90 per hour (the difference between $7.25 and $3.35). If tips don't cover the gap, you pay the shortfall.
Overtime
Idaho follows FLSA: 1.5x for all hours over 40 in a workweek for non-exempt employees. No Idaho-specific overtime rules beyond FLSA.
Final Paycheck Rules
Idaho requires final wages to be paid on the next regular payday or within 10 days of separation — whichever comes first. The 10-day rule prevents employers from delaying payment when the next regular payday is far out.
There's an additional layer: if the separated employee makes a written request for early payment, Idaho law requires the employer to pay within 48 hours of receiving that request. That's a tight turnaround. Make sure your payroll or accounting team knows that a written request from a former employee for their final check triggers a 48-hour payment obligation.
What to Include
The final paycheck must cover all wages earned through the last day worked. Idaho does not mandate vacation payout at termination by statute. Your written policy controls — a policy that promises vacation payout creates an enforceable obligation, while a properly disclosed "use it or lose it" policy is generally enforceable.
Federal Payroll Taxes
Idaho employers owe federal payroll taxes in addition to state obligations:
- Social Security: 6.2% employer + 6.2% employee on wages up to $184,500
- Medicare: 1.45% employer + 1.45% employee on all wages; 0.9% Additional Medicare Tax on employee wages over $200,000
- FUTA: 6.0% on first $7,000, effective 0.6% with state UI credit
- Federal income tax withholding: Per each employee's W-4
The contrast between Idaho's $58,300 SUI wage base and FUTA's $7,000 base is worth noting. You owe FUTA only on the first $7,000 of each employee's wages. But you owe Idaho SUI on the first $58,300. These are separate calculations with completely different wage ceilings.
Registering as a New Employer in Idaho
Two registrations are required before running Idaho payroll:
- IDOL registration: Register with the Idaho Department of Labor for your SUI account at labor.idaho.gov. You'll receive your employer account number and initial rate assignment.
- Idaho Tax Commission registration: Register with the Idaho State Tax Commission for income tax withholding at tap.idaho.gov. You'll receive your withholding account number and filing frequency assignment.
Both registrations require your FEIN and basic business information. Process time is typically a few business days for online filings.
Filing Deadlines and Penalties
Idaho Withholding Penalties
- Late filing: 5% of tax due per month, up to 25%
- Late payment: 0.5% per month on unpaid balances plus interest (6% per year for 2026)
- Failure to withhold: Employer is liable for amounts that should have been withheld
SUI Penalties
- Late quarterly report: 10% of contributions due for the quarter
- Late payment: Interest at the IDOL-set rate on unpaid contributions
Idaho Payroll Is Simpler Than the Wage Base Suggests
Despite the notable $58,300 SUI base, Idaho payroll is operationally simple. A flat income tax, no PFL, no SDI, federal minimum wage. The compliance burden is light — just budget the SUI cost correctly and configure your withholding for the 5.3% flat rate. A payroll platform like Gusto handles Idaho automatically, including the high-base SUI calculations.
Frequently Asked Questions
What is Idaho's SUI wage base for 2026?
Idaho's SUI taxable wage base for 2026 is $58,300 per employee per year. New employers pay 1.0% on that base, costing up to $583.00 per employee annually before experience rating adjustments.
What is Idaho's state income tax rate for 2026?
Idaho has a flat 5.3% state income tax rate.
What is Idaho's minimum wage in 2026?
Idaho's minimum wage is $7.25 per hour, the same as the federal minimum.
When is a final paycheck due in Idaho?
On the next regular payday or within 10 days of separation, whichever is sooner. If the employee makes a written demand for payment, you must pay within 48 hours of receiving that request.
Does Idaho have a paid family leave or state disability insurance program?
No. Idaho has no PFL or SDI program. Federal FMLA applies to employers with 50+ employees, but Idaho imposes no state leave insurance contribution.
How does Idaho's $58,300 SUI wage base compare to the federal FUTA base?
It is more than eight times the $7,000 FUTA wage base. Idaho employers pay SUI on a far larger share of each employee's wages than they pay FUTA on.
Simplify Idaho Payroll
Gusto handles Idaho's $58,300 SUI wage base, 5.3% flat income tax withholding, W-2s, and IDOL filings automatically. Trusted by 300,000+ small businesses.
Legal & Tax Disclaimer
This article is for general informational purposes only and does not constitute legal, tax, or professional advice. Employment laws, tax regulations, and compliance requirements change frequently. Always consult a qualified attorney, CPA, or HR professional familiar with Idaho law before making payroll or compliance decisions for your business.