Gross-Up Calculator
Promised a net amount? Employers gross up bonuses, relocation packages, and reimbursements so you keep exactly what was promised — this calculator finds the gross figure.
How to use this calculator
- Enter net amount to keep.
- Enter tax rate.
- Your results appear instantly below and update as you change the numbers.
How this calculator works
Divide the net amount by (1 − tax rate) to get gross, and the difference is the tax. Worked example: $100 net at 22% requires $128.21 gross — the $28.21 extra covers the withholding.
Frequently asked questions
When is grossing up used?
Whenever an employer promises an after-tax amount: one-time bonuses, relocation reimbursements, moving expenses, and prizes or awards. The employer pays the tax so the employee receives the stated figure.
What tax rate should I use?
Supplemental income is withheld at a flat 22% federally (37% above $1 million). State taxes add on top — include your state's rate in the total if the employer grosses up for state too.
Does grossing up change my taxable income?
Yes — the grossed-up amount is all taxable income, including the portion used to pay the tax itself. That is why the formula divides by (1 − rate) rather than simply adding the rate on top.
How is gross-up different from net pay?
Net pay is what you take home after normal payroll withholding. A gross-up is a deliberate calculation to hit a target net for a specific payment — the two use the same tax math but answer different questions.
Disclaimer: Results are estimates for general information only and do not constitute financial, tax, or legal advice. Figures reflect 2026 rules and may change. Always confirm current limits and consult a qualified professional before making decisions. Official figures: IRS.gov · 2026 limits per IRS tax inflation adjustments.