A crazy quilt of laws governing state income taxes for "road warriors" -- residents of one state who work in another -- can make tax collections a nightmare. Yet states don't necessarily favor streamlining the system under a proposed federal law.
The way it works now, states have varied standards for requiring workers to file personal income tax returns when those employees work for periods of time in a state where they don't live. The rules also dictate how employers withhold income tax for those employees.
Some states, such as New York, carefully monitor out-of-state workers; other states are less vigilant about it, according to the Council on State Taxation, or COST, a Washington, D.C.-based trade association for multistate corporations.
Some states have a "first day" rule, which means if you set foot in a state you don't live in and work there for one day, you owe that state income tax. Other states have varying periods of time when the nonresident income tax kicks in, ranging from 10 days to 60 days. To complicate things further, some states do not assess the income tax on a time-worked basis; rather, they assess it on an income-earned basis starting at a floor of anywhere from $300 to $1,800 a year, according to the Council on State Taxation.
Corporations would like to see a streamlined standard for withholding and collecting income taxes on nonresidents and are backing federal legislation that would make all state tax rules conform. COST officials say it's a nightmare for businesses to keep up with the different regulations.
"The problem is people who travel to other states for work. I travel to 20 or 30 states a year," said Doug Lindholm, president and executive director of COST. "Half of the states, the requirement is that as soon as I work in that state, I owe them a personal income tax return and the company has a withholding responsibility. It's a 'gotcha' waiting to happen.
"Very few people comply with it, and very few companies comply because they don't know where their employees are all the time."
Mary B. Hevener, an attorney with the Washington, D.C., firm of Morgan Lewis who specializes in interstate tax issues, said many companies are developing software that can handle the myriad state laws regarding "road warrior" workers. But the complexity of all the rules makes it difficult to keep track, she said.
"If you go to a state, you could be taxed, or if you stay there one minute, you could be taxed," she said. "If you land in a state and check your BlackBerry, some states say, 'Yeah, that's work.' How much of a day is 'work?' Is attending a conference? Attending an awards ceremony?"
Ms. Hevener said some states are more aggressive, noting New York and California as examples. She characterized Minnesota and Pennsylvania as states that "look" into workers from other states. Others are less interested.
States have attempted to ease the situation in a couple of ways. Reciprocal agreements among bordering states can eliminate the problem. Maryland and Virginia, for example, have reciprocity, which means a Virginia resident who works in Maryland does not have to pay Maryland income tax. The District of Columbia, due to its unique nature as the seat of federal government and attractiveness to out-of-state workers, has reciprocity with all states.
States have also developed model legislation through the Multistate Tax Commission that would cover the income tax treatment of nonresident workers. This legislation would not require an employer to withhold income tax on a nonresident employee who works in the state for no more than 20 days. And the nonresident is not required to pay income tax on those earnings.
But the legislation only applies to workers from states with no income tax or from states which have agreed to the model legislation. So far, only North Dakota has implemented it. Since no other state has signed on, this option does not appear to have wide appeal.
The model legislation does not include professional sports figures, whose contracts generally spell out taxation issues since they play games in many states in the course of a season, experts said.
Under the "Mobile Workforce State Income Tax Simplification Act," pending in Congress, the amount of time a worker has to work in a state to be liable for income taxes in that state would be standardized at 30 days.