It’s easy to switch. We’ll even set you up for free

Free Idaho payroll tax
calculator (and ID tax rates)

Ready to get started?

  • Get Started

  • 1

    Pay Details

  • 2


  • 3

    Federal Information

  • 4

    State Information

  • 5

    Locale Information

  • 6

    Voluntary Deductions

  • 7

    Calculate Paycheck

Welcome to our payroll calculator!

Before we jump in, who are you using this calculator for?


Our calculators are designed for employers, and they’ll ask for information you may not have. For a better experience, please check out this employee-focused paycheck calculator.

How much did your employee earn?

Gross Pay: This is the total amount of wages your employee earned before taxes and deductions are withheld.

For salaried employees, gross pay equals their annual salary divided by the number of pay periods per year. For hourly employees, gross pay equals the number of hours worked multiplied by their hourly wage.

(Don’t forget to add on any tips, commissions, or bonuses!)

Gross Pay Method: Is the gross pay amount based on your employee’s annual compensation, or by how many hours they worked in the last pay period?

Gross Pay YTD: Enter the total gross pay your employee has earned this year, prior to this paycheck. Normally, this can be found on the last pay stub.

Pay Frequency: How often do you normally issue paychecks?

Check Date: Enter the check date that should appear on your paycheck.

Is your employee exempt from any taxes?

Federal: In some cases, public and governmental employees are exempt from federal taxes. Check “yes” if your employee is exempt and Federal taxes should not be deducted.

FICA: In some cases, public and governmental employees are exempt from FICA. Check “yes” if your employee is exempt and FICA taxes should not be deducted.

Medicare: In some cases, public and governmental employees are exempt from Medicare taxes. Check “yes” if your employee is exempt and Medicare taxes should not be deducted.

Please enter your employee’s withholding information.

2020 W4: Would you like to use the 2020 withholding tables? Here’s an article that covers the 2020 W-4 updates if you aren’t sure.

Federal Filing Status: Select your employee’s filing status for federal withholding. This helps determine how much federal tax will be withheld.

Two Jobs: If the employee indicated that they have more than one job or are married and filing jointly with a working spouse, select Yes here.

Dependents Amount: Enter the amount your employee listed on Line 3 of their W-4, if any. This is where they claim dependents.

Other Income: If your employee listed another other income on line 4(a) of their W-4, enter the amount here.

Deductions: Enter any deductions that your employee listed on line 4(b) of their W-4, if applicable.

Additional Federal Withholding: If your employee has asked to have additional funds withheld from each paycheck, enter the amount here. If they have not, enter “0”.

Round Federal Withholding: Would you like us to round your employee’s withholding totals to the nearest dollar? (It’s not required, but it is permitted)

Now, add information for their state.

State: Select the state where withholding should be calculated. It should be the same state where the work was performed.

Now, add locale information if applicable.

Does your employee have any voluntary deductions?

Please add any additional deductions for items like health insurance, 401(k), HSAs/FSAs, or any other benefits.

Select type of deduction needed:


Add deduction


Add deduction


Add deduction

Let’s finish crunching the numbers!

Click the button below to see your paycheck calculated.

Here’s your paycheck information:

Leave payroll to us.

We do all the hard work to set you up, starting at just $40 + $6 per employee.

Updated: May 6, 2024

Whether you own the newest restaurant in Boise or the oldest bar in Twin Falls, there is one thing you and all other small business owners definitely don’t love: payroll taxes. Luckily, we’re here to help. All you need to do is enter wage and W-4 information for each employee and our payroll tax calculator at the top of this page will calculate all the Idaho and Federal payroll taxes for you.

Federal payroll taxes for Idaho employers

First and foremost, we have to take care of Uncle Sam. Our handy payroll calculator can help you figure out the federal payroll tax withholding for both your employees and your business.


Below is a quick 6-step overview of everything that goes into calculating the payroll tax for your employees. If you prefer to see a more detailed calculation, head on over to the step-by-step guide we created just for you.

  1. Figure out the employee’s gross wages. Gross wages represent the amount of money an employee has earned during the most recent pay period.
    1. Hourly employees: Multiply the number of hours worked in the most recent pay period by their pay rate. Make sure to calculate any overtime hours worked at the appropriate rate.
    2. Salaried employees: Divide each employee’s annual salary by the number of pay periods you have each year.
    3. Don’t forget to add bonuses, commissions, and tips in here as well.
  2. Deduct any pre-tax withholdings. Do your employees have 401(k) accounts, flexible spending accounts (FSA), or other pre-tax deductions? If so, deduct their contributions to these accounts from their gross wages before you start applying federal payroll taxes.
  3. Deduct federal income taxes, which can range from 0% to 37%. We won’t get into the nitty-gritty here, but you can find all the withholding information through this IRS publication.
  4. Deduct and match any FICA taxes to cover Medicare and Social Security taxes:
    1. Medicare tax: Withhold 1.45% of each employee’s taxable wages until they have earned $200,000 in a given calendar year. You as the employer will need to match this tax. For employees who earn more than $200,000 in taxable wages, you need to withhold what’s called an Additional Medicare Tax (super original, we know). The rate is 0.9%. Only the employee is responsible for paying the Additional Medicare Tax.
    2. Social Security tax: You need to withhold 6.2% of each employee’s taxable wages until they have earned $168,600 in the 2024 calendar year. The maximum amount of Social Security tax that employees must pay would, therefore, be $10,453.20. As the employer, you also must match this tax.
  5. Pay FUTA unemployment taxes: You as the employer are responsible for paying 6% of the first $7,000 of taxable income an employee earns annually, which comes out to a maximum tax of $420 per employee. However, you can claim a tax credit of up to 5.4% for paying your Idaho state unemployment taxes in full and on time each quarter, which means that when everything’s said and done, you’ll only have to pay 0.6% FUTA tax. Your employees are not responsible for paying FUTA taxes.
  6. Subtract any post-tax deductions: Most of your employees will be done at this point, but some of them may be responsible for court-ordered wage garnishments or child support. They may also choose to make post-tax contributions to savings accounts, elective benefits (like life insurance), or other withholdings.

Idaho state payroll taxes for 2024

Now that we’re done with federal income taxes, let’s tackle Idaho state taxes. The State of Idaho has a flat income tax of 5.8% and this change is as of 2023.

Payroll call-to-action

Staying compliant

Did you know that having a workers’ comp policy in place is a requirement for most employers in the state of Idaho? Learn how policies work, how this type of coverage protects employees from workplace injuries and illnesses, and what employers should know in our guide to Idaho workers’ compensation insurance.

Write those paychecks

You’re almost at the finish line! Once you’ve calculated your employees’ net pay by taking out the appropriate withholdings, you’re ready to cut their checks. In addition to making sure your employees get paid on time, don’t forget to set aside the employer taxes your company is responsible for. Those FICA, FUTA, and SUI payments can add up if you don’t remit them on a regular basis. Use Form 941 to file federal taxes quarterly. Use Form 940 to report your annual FUTA tax. You can pay taxes online using the EFTPS payment system. You can find more details about employment tax due dates here.

Idaho state unemployment insurance

As an employer, you’re responsible for paying SUI (remember, if you pay your state SUI in full and on time, you get a 90% tax credit on FUTA).


Idaho’s SUI rates range from 0.306% to 5.4%. The taxable wage base in 2024 is $53,500 for each employee.


New employers pay 0.97% for at least the first six quarters.


Additional Idaho payroll tax resources

If all that wasn’t enough, and you want to learn more about Idaho payroll taxes, here are a few websites we suggest you check out:


Idaho State Tax Commission – – (800) 972-7660 | Income Tax Withholding | E-Pay


Idaho Department of Labor (800) 448-2977 | Register Your Business | Employer Portal

More helpful payroll calculators for Idaho employers

Employers in the state of Idaho can use the calculator at the top of this page to quickly figure out their employees’ gross pay, net pay, and deductions in a few clicks (and feel confident when cutting paychecks). But employers sometimes have a little more math to do during the workweek. For example, do you occasionally reward top-performing employees with bonuses? In the eyes of the IRS, these payments are considered supplemental wages and require taxes to be withheld. Also, if you have workers who occasionally move on to other companies, every so often you may need to spend time calculating their final paychecks. So, if you need a little more help adding up the numbers, check out some of the calculators listed below.


It’s easy
to get started

Try OnPay out yourself to see how easy payroll and HR can be. To get started, just share a few basic details about your business. Our team of pros will set everything up and import your employees’ information for you.