Gross-Up Calculator (2026)

Why gross-up math is circular

You want $10,000 in your bank after tax. Your employer agrees to pay tax on the payment so you net $10,000. Every dollar they add to cover tax is itself taxable wages—so the gross must be higher than $10,000 divided by (1 − tax rate). Payroll teams call this a gross-up; finance models it with an effective marginal rate or solver loop.

This calculator solves for gross given a net target using federal income tax brackets for 2026, standard deduction context you enter, and employee FICA at 6.2% up to $184,500 plus 1.45% Medicare. It is a planning aid for offer letters and HR policy—not a substitute for payroll system rounding rules.

Use alongside the paycheck calculator for forward math (gross to net) and the bonus tax calculator when supplemental withholding methods apply instead of annualized gross-up agreements.

2026 tax inputs that move the gross

Standard deduction amounts: $16,100 single, $24,150 head of household, $32,200 married filing jointly (Rev. Proc. 2025-32). Other wages in the year fill lower brackets first— a $10,000 net bonus gross-up for someone already earning $200,000 needs a higher gross than for someone earning $50,000 because marginal federal and FICA rates differ.

Social Security stops at $184,500 cumulative wages; Medicare does not. If the gross-up pushes wages from $180,000 to $195,000, the last slice may avoid Social Security but still pay Medicare and potentially Additional Medicare Tax at 0.9% above thresholds.

Simple formula vs full bracket solve

A rough shortcut: gross ≈ net ÷ (1 − marginal rate). If marginal federal plus FICA is 35%, gross ≈ $10,000 ÷ 0.65 ≈ $15,385. That ignores bracket steps, standard deduction absorption, and the tax-on-tax recursion. This tool uses bracket-aware math for a closer estimate.

Employers sometimes use a flat supplemental withholding rate (22%) for gross-up estimates on bonuses even when annual liability differs. Contract language matters: “net of all applicable taxes” is broader than “net of federal income tax only.”

How to use the calculator

Step 1 — Enter desired net amount

The cash you want after federal income tax and employee FICA on this payment—not after 401(k) deferrals unless you model those separately.

Step 2 — Add annual wage context

Other salary in the year determines which bracket the gross-up sits in. Include year-to-date wages if the payment lands late in the year near the Social Security cap.

Step 3 — Read gross and total employer cost

Gross is the payment before employee-side withholding. Total employer cost may also include employer FICA match and state tax gross-up if your policy covers those—add manually.

Relocation and signing bonus examples

Offer says $15,000 relocation, net of federal income tax and FICA, paid as supplemental wages, single filer, $85,000 salary, standard deduction. The gross might land in the low $20,000s depending on solver assumptions—run exact inputs above. If the offer caps employer cost at $15,000 gross instead, your net will be lower than $15,000.

Equity gross-ups for withholding at vest are a specialized variant—brokerage supplemental rates and 83(b) elections add complexity this general tool does not cover.

Gross-up vs net bonus language

Employees often hear “$20,000 bonus” and assume take-home. Without gross-up, a $20,000 supplemental payment might net near $13,000–$15,000 after federal and FICA for many middle-bracket filers, before state tax. The compare paychecks tool helps side-by-side scenarios when evaluating offers.

Employer payroll perspective

Payroll systems gross-up using either a target net algorithm or published tables. Rounding to cents, pre-tax deductions, and state reciprocity can differ by vendor. Finance should not treat this browser estimate as the payroll feed without reconciliation.

Employer FICA match on the gross-up payment is an additional company cost not shown as employee net. A $25,000 gross-up might cost the employer roughly $25,000 × 7.65% extra in FICA match on wages still under the Social Security base.

Interaction with benefits and deferrals

If gross-up payments are eligible for 401(k) deferral, pre-tax elections shrink FICA and income tax differently than a gross-up designed to hit an exact net outside the plan. Most gross-up policies specify the payment is not deferred. Clarify in writing.

State tax gross-ups

California, New York, and other states with progressive income tax increase the gross required for the same net. After using this tool, add state marginal rate in a second pass or use the state income tax calculator with iterative guessing.

Common mistakes

• Using net ÷ (1 − 22%) because that is supplemental withholding—not annual marginal rate
• Ignoring other wages that fill lower brackets
• Forgetting Medicare on wages above the Social Security cap
• Assuming gross-up covers self-employment tax on 1099 income—it does not unless structured as W-2 wages
• Not documenting whether state and local taxes are included in the employer promise

Related tools

Forward paycheck modeling: paycheck calculator. Severance net estimates: severance tax calculator. Full-year liability: federal income tax calculator.

Additional planning notes for 2026

Tax software and professional preparers reconcile annual Form 1040 liability against W-2 withholding—not any single calculator snapshot. Use the interactive form above as a transparent starting point, then validate filing status, dependents, and pre-tax elections before you treat output as a filing estimate. Where this page references 2026 figures, they follow IRS Rev. Proc. 2025-32 and SSA wage base announcements unless noted otherwise.

Federal ordinary rates remain 10%, 12%, 22%, 24%, 32%, 35%, and 37%. Employee FICA is 6.2% on wages up to $184,500 plus 1.45% Medicare on all covered wages. Additional Medicare Tax at 0.9% applies above $200,000 single / $250,000 joint / $125,000 MFS. Standard deduction amounts are $16,100 single and married filing separately, $24,150 head of household, and $32,200 married filing jointly.

State residency, local income taxes, and voluntary payroll deductions can move cash results without changing the federal concepts modeled here. When a scenario spans multiple jobs, side income, or mid-year life changes, pair this page with the federal income tax calculator, paycheck calculator, and tax refund estimator so withholding, liability, and refund expectations stay aligned.

Documentation matters at filing time: retain 1098 and 1098-E forms, charitable acknowledgments, medical receipts, mileage logs, and employer plan confirmations that support positions you claim. Rounding in browser tools may differ slightly from payroll systems that round per pay period.

Disclaimer

Educational estimate only. Offer letters, payroll systems, and state rules control actual payments. Consult HR, payroll, or a tax professional before committing to net-of-tax compensation structures.