US Gross-Up Calculator: Calculate the Gross Pay Needed for a Target Net Payment

Gross-up basics

What is a gross-up payment?

A gross-up payment is a payment increased to account for taxes or other deductions so the recipient receives a predetermined net amount. It is a reverse payroll calculation: instead of starting with gross pay and finding the resulting take-home pay, you start with the desired take-home amount and solve for the gross payment.

Gross-up calculations can be relevant when an employer wants an employee to receive a particular after-tax amount. Examples can include certain bonuses, relocation payments, signing payments, taxable reimbursements, and other taxable compensation arrangements.

How to calculate gross pay from net pay

A simplified gross-up calculation starts with the target net amount and an assumed deduction rate. Because deductions are taken from gross pay, the required gross amount must be higher than the desired net payment.

Gross-up example: $5,000 target net payment

Suppose the recipient must receive $5,000 after deductions and a simplified example assumes a combined deduction rate of 25%. The calculation would be $5,000 ÷ 0.75, producing an estimated gross payment of $6,666.67.

This is a simplified mathematical example, not a statement that 25% is the actual payroll withholding rate for a specific employee.

Gross-up vs. gross-to-net

The two calculations solve opposite sides of the same payroll relationship. Gross-to-net starts with gross pay and estimates the resulting net pay. Gross-up starts with the desired net amount and estimates the gross payment required to reach it.

When is a gross-up calculation used?

Gross-up calculations are useful when the amount the recipient keeps matters more than the stated gross payment. Common situations can include:

• Net bonuses: an employer wants a bonus to result in a specified amount after withholding.
• Relocation payments: a taxable relocation benefit is structured around a target net amount.
• Taxable reimbursements: a reimbursement is treated as taxable compensation and the recipient is expected to receive a particular net amount.
• Signing payments: compensation is structured around an intended amount after withholding.
• Taxable benefits: payroll needs to account for taxes associated with an employer-provided benefit.

Federal withholding

2026 IRS supplemental tax withholding for bonuses

A bonus or other supplemental wage may be withheld differently from regular wages. In 2026, employers may generally use the optional 22% federal income-tax withholding rate for eligible supplemental wages that are separately identified and meet IRS requirements. When an employee's supplemental wages exceed $1 million for the calendar year, the excess is subject to mandatory 37% federal income-tax withholding. These are withholding rates, not necessarily the employee's final tax rates.

Federal supplemental withholding is only one part of a bonus gross-up. Social Security and Medicare may also apply, as may state income tax and deductions. This calculator does not select a supplemental-wage payment method or apply the optional 22% flat rate; it estimates the gross amount through its regular 2026 paycheck calculation. For a bonus payroll run, confirm the payment method and withholding setup with the employer's payroll provider.

Statutory payroll taxes

2026 FICA payroll tax breakdown

FICA combines Social Security and Medicare taxes on covered wages. The employee portion reduces take-home pay, and year-to-date wages can change the Social Security and Additional Medicare amounts withheld from a particular check.

These are employee-side rates. The employer generally pays a matching 6.2% Social Security and 1.45% Medicare tax; the Additional Medicare Tax is not matched by the employer. Wage caps and withholding thresholds apply as described above.

State income tax, local taxes, and gross-up estimates

State income-tax rates and withholding methods vary, so the same target net payment may require different gross pay in different states. Some states do not tax individual wage income, while others use progressive brackets or additional payroll rules. The calculator includes an estimated state income-tax amount for the selected state.

Local income taxes may apply in some cities and counties, but this tool has no local-jurisdiction input and does not include local wage taxes in its result. It also does not model every employee-specific W-4 election or every employer withholding configuration. Include those limits when comparing the result with a payroll quote or an actual pay statement.

Pre-tax deductions, year-to-date wages, and net pay

A pre-tax benefit or retirement contribution can change which wages are subject to particular payroll taxes, but treatment depends on the deduction and plan. The calculator accepts supported Section 125 and HSA amounts, 401(k) contributions, and post-tax deductions. Enter the deduction for the pay period being estimated and follow the input labels; do not assume every deduction reduces both income-tax and FICA wages.

Year-to-date inputs matter most when a payment crosses a wage base or withholding threshold. For example, an employee who has already reached the Social Security wage base may have little or no additional Social Security withholding on later covered wages for the year, while Medicare withholding continues. An employer may also begin Additional Medicare withholding after its payments to an employee exceed $200,000.

Gross-up amount versus total employer payroll cost

A net-to-gross calculation estimates the employee's gross taxable payment. It is not a complete employer-cost estimate. Employers may also owe their share of Social Security and Medicare, federal and state unemployment taxes, workers' compensation premiums, and benefit costs. Budgeting for a guaranteed net bonus or relocation payment should account for both the grossed-up compensation and these employer-side costs.

The employer's accounting and payroll teams should confirm the payment classification, taxability, withholding method, state and local obligations, and any compensation-plan terms. This calculator estimates employee-side net pay, not the organization's total cost.

Grossing up relocation, severance, and other payments

Employers sometimes gross up taxable relocation assistance, severance, signing bonuses, or reimbursements so an employee receives a stated net amount. The gross-up itself is generally additional compensation and may create further withholding, which is why the calculation must solve for a gross figure rather than add a simple tax estimate to the target amount.

First confirm whether the underlying payment is taxable wages and how it should be reported. Rules differ by payment type and circumstance; not every reimbursement is treated the same. This calculator can estimate a net-to-gross amount with its supported inputs, but it does not determine a payment's legal or tax classification.

Common mistakes when estimating gross pay from net

• Treating one rate as the whole tax calculation: federal income tax, FICA, state tax, and deductions do not all follow one flat percentage.
• Confusing withholding with final tax: paycheck withholding is a prepayment; final income-tax liability depends on the full tax-year situation.
• Ignoring year-to-date wage limits: prior wages can affect Social Security and Additional Medicare withholding on a new payment.
• Assuming the tool covers every payroll item: local wage taxes and a separately selected supplemental-wage method are not included in this calculator's estimate.
• Forgetting employer costs: employee gross pay is not the same as the employer's total payroll cost.

Why a gross-up estimate can differ from an actual paycheck

An online gross-up estimate may differ from an employer's actual payroll calculation. Payroll can use employee-specific W-4 information, year-to-date wages, pay frequency, supplemental-wage treatment, state and local taxes, benefit deductions, retirement contributions, wage limits, and employer-specific settings.

Withholding is also different from final tax liability. Payroll withholding is an amount withheld during the year, while final income-tax liability is determined under the applicable tax rules for the complete tax year.