A relocation gross-up is additional money your employer pays on top of your moving benefits to cover the taxes those benefits create, so the net value you receive matches what the company promised. Because the IRS treats almost every form of employer-paid relocation help as taxable wages, a $15,000 moving package would lose thousands to federal, state, and payroll taxes without one. The gross-up is calculated so that after all withholding, including the tax on the gross-up itself, you walk away whole.
Why Your Relocation Money Is Taxed
Before the Tax Cuts and Jobs Act of 2017, employees could exclude qualified moving expense reimbursements from gross income. The TCJA suspended that exclusion, and later legislation made the change permanent. The exclusion now applies only to active-duty members of the Armed Forces relocating under permanent change-of-station orders and certain intelligence community employees.1Office of the Law Revision Counsel. 26 U.S. Code 132 – Certain Fringe Benefits For everyone else, the reimbursement is added straight to W-2 wages.
The structure of the payment doesn’t change the tax outcome. A lump sum paid to you, a reimbursement based on submitted receipts, and a direct payment from your employer to a moving company are all taxable compensation.2Internal Revenue Service. Moving Expenses to and from the United States That is the whole reason gross-ups exist. Without one, you effectively pay for part of a move the company said it would cover.
What Counts as Taxable Relocation Income
Nearly every expense tied to your move creates taxable wages. Common categories include:
- Household goods: professional movers, truck rental, packing materials, and in-transit storage.
- Travel to the new location: airfare, mileage for driving your own car, lodging during the trip.
- Temporary housing: corporate apartments or hotels used while you search for permanent housing, often 30 to 60 days.
- Home sale assistance: broker commissions, closing costs, or buyer-incentive payments the employer covers.
- Miscellaneous costs: lease-breaking fees, utility connection charges, and house-hunting trips.
Home sale assistance drives the largest gross-ups because the dollar figures are large. Covering $25,000 in real estate commissions creates a far bigger tax bill than reimbursing $3,000 in truck costs, and the gross-up scales with it.
If You’re Active-Duty Military
Service members relocating under permanent change-of-station orders remain the one civilian-facing exception. Qualified moving expense reimbursements are not taxable income, and unreimbursed qualified expenses can be deducted on IRS Form 3903.3Internal Revenue Service. Instructions for Form 3903 – Moving Expenses If you’re a civilian employee, none of that applies, and the entire employer relocation payment is taxable to you.
The Gross-Up Formula
The basic formula divides the taxable relocation benefit by one minus your combined tax rate. If you receive $10,000 in relocation benefits and your combined federal, state, and FICA rate is 30%, the calculation is $10,000 ÷ 0.70 = $14,285.71. The extra $4,285.71 covers the taxes.
You divide rather than multiply because the gross-up is itself taxable income. Applying a straight percentage to the base benefit always falls short: the additional pay generates its own tax, which needs its own gross-up, and so on. Dividing by (1 − tax rate) solves the whole stack in one step.
Flat-Rate Versus Marginal-Rate Methods
Employers pick between two approaches, and the choice affects how close the result lands to your actual tax bill.
Flat-Rate Method
The flat-rate method applies the 22% supplemental wage withholding rate, plus FICA and applicable state rates, to the relocation benefit. It’s easy to run through standard payroll software. The trade-off is precision. If your actual marginal bracket is higher than 22%, you’ll owe money at tax time. If it’s lower, you get a small windfall. Companies processing hundreds of relocations a year often accept that imprecision for the simplicity.
Marginal-Rate (Iterative) Method
The marginal-rate method uses your actual bracket rather than the flat supplemental rate. Because the gross-up itself pushes taxable income higher, the calculation loops: tax on the benefit creates a new taxable amount, which creates a new tax, with each round smaller than the last until the number converges. For a $20,000 benefit at a combined 35% rate, the final grossed-up payment lands around $30,769. The method is more work, but it’s the standard for high-value packages where a few hundred dollars matters to both sides.
Inputs That Drive the Number
A gross-up that actually leaves you whole depends on getting each input right.
Federal Supplemental Rate
Relocation reimbursements are classified as supplemental wages. Employers can withhold at a flat 22% for supplemental payments up to $1 million in a calendar year. Above that threshold, the rate on the excess jumps to 37%.4Internal Revenue Service. Publication 15 – Employer’s Tax Guide – Section: 7. Supplemental Wages Most corporate relocations sit well below that line, so 22% is the standard starting point. Some employers use your actual marginal bracket instead, which for 2026 runs from 10% to 37% depending on income and filing status.
FICA and the Wage Base
Social Security tax applies at 6.2% on wages up to the annual wage base, which is $184,500 for 2026.5Social Security Administration. Contribution and Benefit Base Medicare tax applies at 1.45% with no cap.6Internal Revenue Service. Topic no. 751, Social Security and Medicare Withholding Rates Combined, that’s 7.65% on most earnings.
The wage base matters. If your regular salary already exceeds $184,500 before the relocation payment hits, no additional Social Security tax applies to the reimbursement or its gross-up. Ignoring the cap inflates the gross-up and costs the employer money.
Additional Medicare Tax
An extra 0.9% Medicare tax kicks in once your total wages pass $200,000 in a calendar year ($250,000 for joint filers). Employers must start withholding it at $200,000 regardless of your actual filing status.6Internal Revenue Service. Topic no. 751, Social Security and Medicare Withholding Rates On a large relocation for a senior employee, that 0.9% can add several hundred dollars.
State and Local Tax
State rates vary widely. A move to a no-income-tax state needs a smaller gross-up than one to a state with a top rate above 10%. Both the origin and destination states may claim a piece depending on when payments hit and how each sources relocation wages. Employers typically use the destination state’s rate but often consult tax advisors on the details. A handful of states, including California, New York, New Jersey, Massachusetts, Pennsylvania, Arkansas, and Hawaii, still let residents deduct qualified moving expenses on their state returns. Most employers don’t adjust the gross-up for this, but if you qualify, claim the deduction when filing.
How It Shows Up on Your W-2
The full grossed-up amount flows through payroll and appears on your Form W-2. Nonqualified moving expense reimbursements are reported in Box 1 (wages), Box 3 (Social Security wages), and Box 5 (Medicare wages).7Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026) Your employer withholds taxes from the gross-up and remits them to the IRS and state agencies. When you file, those prepaid taxes appear as credits against your total liability.
If the gross-up was calculated correctly, the relocation itself shouldn’t produce a surprise bill or a large refund. A meaningful discrepancy usually means the combined rate used in the formula didn’t match your actual effective rate, which is one argument for the marginal-rate method over the flat approach.
Clawbacks and Repayment
Most relocation agreements include a clawback clause requiring you to repay some or all of the benefits if you leave within a set period, usually 12 to 24 months. Repayment is often prorated: leave at six months of a two-year commitment and you might owe 75%; leave at 18 months and you might owe 25%. Terms should be spelled out in the relocation agreement before any money moves.
The tax side gets uncomfortable. Repayment typically includes the gross-up, because that was part of the total compensation reported on your W-2, but you already paid taxes on that income in the year you received it. To recover those taxes, federal law offers two options under the claim-of-right doctrine, assuming the repayment exceeds $3,000.8Office of the Law Revision Counsel. 26 USC 1341 – Computation of Tax Where Taxpayer Restores Substantial Amount Held Under Claim of Right
- Deduction method: claim the repaid amount as an itemized deduction on Schedule A in the year you repay it.
- Credit method: recalculate your tax for the original year as if you’d never received the income, and take the difference as a credit against your current-year tax.
Calculate both and use whichever produces the lower tax bill.9Internal Revenue Service. Publication 525 (2025), Taxable and Nontaxable Income If the repayment is $3,000 or less, the claim-of-right rules don’t apply, and under current law you generally cannot deduct the repayment at all, because miscellaneous itemized deductions are suspended. That’s a painful outcome worth understanding before signing.
What Gross-Ups Cost Employers
Gross-ups are expensive. Depending on tax rate and state, the gross-up typically adds 40% to 65% on top of the underlying benefit. A $30,000 relocation package can easily become $42,000 to $49,500 once the gross-up is included. That cost shapes policy. Some firms offer partial gross-ups covering only certain expense categories. Others limit gross-ups to employees above a specified level. A growing number of companies have shifted to lump-sum relocation payments with no gross-up at all, leaving you to manage both the move and the tax bill with a fixed budget. That approach saves the employer money and shifts real risk to you.