State wages on a W-2 are the portion of your yearly earnings that a particular state counts as taxable, and the figure appears in Box 16 of the form. It’s the starting point your state uses to calculate the income tax you owe, and it often doesn’t match the federal wages reported in Box 1 because states treat certain pre-tax deductions differently from the IRS.
Where to Find State Wages on the Form
Three boxes on your W-2 work together to report state wage information:
- Box 15 shows the state and your employer’s state tax identification number.
- Box 16 shows your total taxable wages in that state for the year. This is the figure your state income tax is calculated from.
- Box 17 shows the state income tax your employer withheld from your paychecks during the year.
If you worked in more than one state during the year, you’ll see a separate line in Boxes 15 through 17 for each state. Some employers issue a separate W-2 for each state instead of stacking the lines on one form. Either presentation is normal, and you’ll use the numbers from each state when filing that state’s return.
Why Box 16 Doesn’t Match Box 1
The most common question people have when they look at their W-2 is why the state wages number isn’t the same as the federal wages number. In almost every case, the answer is a handful of deductions that your state treats differently from the federal government.
Federally, contributions to a 401(k) or similar retirement plan reduce the wages reported in Box 1. Most states follow that treatment, but not all. Pennsylvania, for example, taxes employee retirement plan contributions that the federal government lets you defer. If you live there, your Box 16 will be higher than your Box 1 by the amount you contributed.
Cafeteria plan benefits under Section 125 work the same way. Federally, health insurance premiums and dependent care contributions you pay through an employer plan come out pre-tax and reduce Box 1. New Jersey doesn’t recognize that federal exclusion for cafeteria plans, so premiums you paid pre-tax at the federal level still show up as taxable wages for state purposes.
A few states also add back certain fringe benefits the federal code excludes, or allow deductions the federal code doesn’t. The net effect is that Box 16 can be noticeably higher than Box 1 if you’re in a state that taxes retirement contributions, or slightly lower if your state offers deductions the federal code doesn’t. A gap between the two numbers isn’t a sign of error on its own; it’s expected.
What Gets Counted as Wages
State wages include most of what you’d expect: regular salary or hourly pay, bonuses, commissions, tips, overtime, and vacation pay. The value of certain non-cash benefits your employer provides, like meals or lodging, can also count. These categories track closely with what the IRS considers wages for federal purposes.1Internal Revenue Service. Topic No. 401, Wages and Salaries The interesting variation between states is in what they exclude, which is where the Box 1 versus Box 16 differences come from.
If You Worked in More Than One State
When your W-2 shows wages for two or more states, the totals in Box 16 for each state generally reflect the income attributed to work performed there. The sum of the state wage lines may be more than your federal wages in Box 1 if any of your income was effectively reported to two states, which happens when a work state and a home state both claim the earnings.
Living in one state and working in another is where this gets complicated. The work state generally gets first claim on the income earned there, and your home state gives you a credit for taxes paid to the other state. About sixteen states and the District of Columbia participate in reciprocity agreements that simplify this: your employer withholds tax only for your home state, you file a short exemption form with the work state, and no nonresident return is required. Reciprocity only works between specific pairs of states, though. Indiana, for example, has agreements with Kentucky, Michigan, Ohio, Pennsylvania, and Wisconsin, but not every neighboring state.
If your states don’t have reciprocity, expect to file a nonresident return in the work state and claim a credit on your home-state return. The state wage numbers in Box 16 are what you’ll plug into each of those returns.
What the Number Is Used For Beyond Income Tax
Your state wages don’t only drive the state income tax calculation. They also feed into benefit programs that may matter later.
Unemployment insurance eligibility and benefit amounts are based on your wages during a “base period,” usually the earliest four of the last five completed calendar quarters. Higher past wages generally mean a higher weekly benefit, up to the state’s cap. Even in states with no income tax on wages, state wage reporting still happens so that unemployment and other programs work.
Workers’ compensation benefits, which replace a portion of your wages if you’re injured on the job, are calculated as a percentage of your average weekly wage — typically around two-thirds — subject to state-set minimum and maximum limits. The definition of “wages” for workers’ comp can include overtime, tips, and the value of certain benefits, with each state drawing the line a little differently.
In California, Hawaii, New Jersey, New York, and Rhode Island, state wages also determine eligibility for short-term disability insurance when you can’t work due to a non-job-related illness or injury. Puerto Rico runs a similar mandatory program.
If the Box 16 Figure Looks Wrong
Employers make mistakes. Wages can get allocated to the wrong state, a reciprocity election can get missed, or a deduction can be miscalculated. If something looks off, start by contacting your employer’s payroll department. They can issue a corrected form called a W-2c.2Internal Revenue Service. About Form W-2c, Corrected Wage and Tax Statement
Before you call, check the obvious explanation first: pull your last pay stub of the year and see whether the gap between Box 1 and Box 16 lines up with your 401(k) contributions or pre-tax health premiums. If it does, your W-2 is probably right and your state simply taxes something the federal government doesn’t.
If your employer doesn’t cooperate or drags past the end of February, you can call the IRS at 800-829-1040. The IRS will send your employer a letter requesting a corrected W-2 within ten days. If that still doesn’t produce one, the IRS will provide Form 4852, a substitute W-2 you file using your best estimate of wages and withholding from your final pay stub.3Internal Revenue Service. W-2 – Additional, Incorrect, Lost, Non-Receipt, Omitted Filing with estimated figures invites closer IRS scrutiny, so getting a proper W-2c is the better path whenever you can manage it.