Gross-Up Calculator

Do you want to send your employee home with a certain amount of pay? A gross-up calculator helps determine the right gross pay for your employee so they can pocket the net pay you're aiming for.

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An employee's gross salary differs substantially from the amount they take home on payday. Their employer (that's you!) has to withhold income tax, Medicare and Social Security taxes, and other deductions from their gross pay to write them a check for their net pay.

So what gross pay should you offer an employee to ensure they end up with the net pay you have in mind? Well, you could do a bunch of tricky calculations to add federal taxes and other deductions to the net amount . . . or you could use the free gross-up calculator on this page. You just need your employee's net pay and tax information to get started.

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SurePayroll is an affordable and straightforward payroll software that offers automatic payroll runs, tax filing, and exceptional customer service.

Gross income calculator information

You don't need much info to calculate gross income. Along with the net pay you have in mind for this particular employee, you'll input the following information:

  • Your employee's federal tax filing status (married, single, married but withholding at a higher rate, or nonresident alien)
  • The number of allowances your employee lists on their W-4 tax form

You'll also need the same basic pay information you'd enter in any other type of payroll calculator, including these:

  • Payment date
  • Year-to-date pay
  • Pay frequency (for instance, biweekly, weekly, or monthly)

And don't forget to select your employee's state of residence from the calculator's drop-down menu. State income taxes vary across the country, so if you don't choose the right state, you won't calculate the right local tax withholding amount.

Supplemental flat tax rate

Are you trying to calculate the right gross pay for an employee's bonus? Supplemental income, bonuses included, are subject to a 22% federal flat tax and typical federal and state taxes. If you're using this net-to-gross calculator specifically for a bonus, make sure to check Yes on the Federal Supplemental Flat line.

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Pro tip: New 2020 W-4 forms

Employees hired in 2020 should submit a streamlined W-4 form that looks quite different from previous years' forms. Most importantly, the new tax form gets rid of allowances. If your employee submitted a 2020 W-4 form, choose Yes on the calculator's Use 2020 W-4 line and add any information about the employee's additional jobs, dependents, or other income sources as listed on their W-4.

Ready to invest in payroll software? Use this tool to find the best match for your business.

Gross-up FAQ

Gross pay is how much an employee earns before any deductions, which could include taxes, child support payments, health care plan premiums, or 401(k) plans. After deductions, the employee takes home the remaining amount as net pay.

Payroll taxes is an umbrella term for the taxes an employer withholds from their employees' gross earnings. These taxes include the following:

  • Federal and state income taxes
  • FICA taxes, which are Medicare and Social Security taxes
  • FUTA tax, which is the federal unemployment tax

Employers are required to match their employees' FICA and FUTA tax contributions.

Bonuses given in 2020 are subject to a 22% flat federal tax rate along with the typical payroll taxes.

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The takeaway

Working backwards isn't second nature for a lot of us, especially mathematically. Fortunately, the same isn't true of a gross pay calculator—just make sure you're entering the right data to get the most accurate gross-up result.

Do you already have an employee's gross pay and need to calculate their net pay instead? Try this net paycheck calculator to withhold the right amount.


At, our research is meant to offer general product and service recommendations. We don't guarantee that our suggestions will work best for each individual or business, so consider your unique needs when choosing products and services.

Compare the best payroll software costs and features

Starting monthly base price
Monthly fee per employee
Free year-end tax filing
Health benefits administration
Free trial
Get started


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2 mos.


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Free demo


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3 mos.
Icon No  DarkAdditional fee
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2 mos.


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1 mo.

Data as of 3/9/23. Offers and availability may vary by location and are subject to change.

Kylie McQuarrie
Written by
Kylie McQuarrie
Former staff writer Kylie McQuarrie has been writing for and about small businesses since 2014. Her work has been featured on, G2, and Fairygodboss, among others. She's worked closely with small-business owners in every industry—from freelance writing to real-estate startups—which has given her a front-row look at small-business owners' struggles, frustrations, and successes.
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