Companies are expanding their multistate and international footprint. This expansion often includes a hiring or deploying a mobile workforce. These employees could travel across state lines several days a week to visit external clients or internal colleagues from other offices, attend meetings and conferences, and otherwise transact business. Many of these companies are unaware of the complexities of each state's personal income tax rules, withholding and reporting requirements.

When a nonresident employee performs services or works on behalf of the company in another state, the employer could be required to withhold and remit state income taxes on the wages earned in the nonresident state, the state where the company is not based or which the employee is not a resident. Withholding on wages of nonresidents is required of an out-of-state employer if the employer transacts business in the state. Operating or engaging in business by an employee on behalf of the employer in a state, even though these activities are not sufficient to create an income/franchise tax business filing requirement for the employer, would likely be considered transacting business for income tax withholding purposes.

Lack of state nonresident withholding uniformity. Every state has its own law regarding state income tax withholding for nonresident employees. While some states provide for either a day or dollar de minimis threshold, the majority of states require employers to withhold from the very first day or dollar earned in the state. This lack of uniformity requires employers that deploy a mobile workforce to comprehend and apply a patchwork of state rules.

Several states have entered into reciprocal agreements exempting employers in neighboring states from withholding taxes of its employees earning income in the neighboring state. For instance, Ohio has entered into reciprocal agreements with its five border states - Indiana, Kentucky, Michigan, Pennsylvania and West Virginia. These agreements provide that Ohio businesses sending employees into the border state are not required to withhold the other state's income tax on the compensation paid therefor, and vice versa.

Compliance burden for the employer. Given this lack of uniformity, it is not surprising that employers do not always know or follow these state rules. Many employers fail to understand their obligation to withhold the other state's income tax from the employee's income earned outside their home state. The lack of uniformity creates complexity for employers that want to be compliant.

Accurately tracking employee's time and wages in other states means having to adjust timekeeping systems and payroll systems. Employers must be able to flag when an employee is working in another state. Another complication is how to handle salaried employees who are not paid hourly wages and do not have to track time at all. Thus, tracking of these employees is generally a manual process. This data could be further skewed if the traveling employee does not remit or excludes certain day's worth of information, whether they intended to or not.

Employers that are required to deduct and withhold state income tax from wages of nonresident employees could be liable for the payment of the associated tax whether or not it is collected from the employees.

Compliance burden for the employee. Employees must determine if their activity in a nonresident state is subject to tax even if their employer withheld payroll taxes for the state. Thus, employees often file multiple state individual income tax returns to either pay additional taxes or claim a refund on income incorrectly withheld. Spending several hours to complete and file a few or numerous nonresident state tax returns resulting in aggregate a few hundred dollars in state income tax is something an employee wants to avoid and is not high on the list after traveling and working a 10+ hour day. Most road warriors do not file the nonresident returns or have income withheld in these states.

What if one employer does withhold from the employee's paycheck for the nonresident state(s) and another employer in the same industry does not do this for their mobile employees? All else being equal, the employee could consider working for the other employer to not have to deal with the nonresident state income tax return compliance.

Because Texas does not have an individual income tax, employees of Texas-based companies traveling to nonresident states could receive a paycheck less than expected because many employers do not have the capacity to make the employee whole by either increasing the employees' wages to pay for the nonresident state tax and/or pay the tax compliance fees for the preparation of these nonresident individual state income tax returns.

Need a uniform standard. Moving its way through federal legislation is uniform treatment of multistate employees subject to state withholding of income tax, known as the "Mobile Workforce State Income Tax Simplification Act of 2013". The Act would limit the state's authority to tax income of employees who perform duties in states other than their resident state. With the proposed legislation on the table, if an employee travels and works in another state, withholding of state tax in that state would commence after a predetermined time period, such as 20 or 30 days. This would apply uniformly to all 50 states.

Such laws will certainly ease the employer's compliance issues of withholding income taxes from traveling employees. While this simplifies things for employers, employers still have the burden to prove time and wages of employees working in multiple states.

As states have different withholding rules, employers must be cognizant of where their employees are earning income and properly withhold taxes when income is earned outside the employee's home state, as well as what exemptions are available.

Additionally, an employee's physical presence, depending on the extent and frequency, will likely create other state tax obligations for the employer, such as sales tax collection obligations or corporate income/franchise tax liability.

For more information or questions on this topic, please contact your professional at UHY LLP in Farmington Hills 248 355 1040 or Sterling Heights 586 254 1040, or visit us on the web at www.uhy-us.com.